Arquivo de Switched Power Supply - Electronic Circuits https://www.elcircuits.com/category/power-supply/switched-power-supply/ Circuits, tips, projects, and electronics tutorials for beginners and enthusiasts. Wed, 04 Feb 2026 16:07:35 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.elcircuits.com/wp-content/uploads/2025/11/cropped-LOGO-ELC-500x500px-elcircuits.com_-1-32x32.png Arquivo de Switched Power Supply - Electronic Circuits https://www.elcircuits.com/category/power-supply/switched-power-supply/ 32 32 Symmetrical SMPS Switched Power Supply with IR2153 and IRF840 – Complete Guide 2x50V 350W + PCB https://www.elcircuits.com/symmetrical-smps-ir2153-irf840-2x50v-350w-pcb/ https://www.elcircuits.com/symmetrical-smps-ir2153-irf840-2x50v-350w-pcb/#respond Sun, 02 Nov 2025 01:05:00 +0000 https://elcircuits.com/?p=1142 Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840 🌐 You can read this article in: Português | Español 🔧 Who this guide is for: This article is perfect for electronics students, enthusiasts, designers, and hobbyists who want to build a high-power (350W) SMPS switched power supply with excellent cost-benefit ratio. We’ll detail every step of the process, from theory to final assembly! Hello Everyone! In today’s post, we’ll dive into the fascinating world of SMPS (Switched-Mode Power Supply), exploring a project based on the IR2153 Integrated Circuit. This 8-pin PWM (Pulse Width Modulation) controller is a true gem for electronics, allowing us to build an excellent quality unregulated switched power supply for various applications. What makes this project special is the combination of simplicity and performance. With a relatively low cost, we can obtain a robust symmetrical power supply capable of delivering up to 350W of power, ideal for powering audio amplifiers, laboratory power supplies, or other projects that require high symmetrical voltages. 💡 Expert tip: SMPS power supplies like this are up to 85% more efficient than traditional linear power supplies, generating less heat and taking up less space. This makes them ideal for portable applications or where space is limited. ⚡ Understanding the Power Stage The power stage is the heart of our SMPS power supply, responsible for delivering the necessary energy for your applications. In this project, we use two N-type IRF840 MOSFET transistors, robust components widely available in the market, which receive the PWM pulses from the IR2153 integrated circuit. The power supply for the IR2153 IC is provided through the 27K 5W power resistor. An important detail is that, in the internal package of this IR2153D IC, there is already a 15.6V Zener diode for protection. However, the current is limited, so we must be careful not to use a resistor R3 with lower resistance, as this would increase the current at the IC input, potentially damaging the Zener and, consequently, the IC. Attention: If you are using the IR2153D (version with internal diode), there is no need to use the D2 (FR107 or BA159) diode, as this IC already has this component internally. If it’s the IR2153 “without the letter D”, keep the D2 diode as indicated in the schematic. Blocking Filters and Protection At the circuit input, we implement an EMI (Electromagnetic Interference) filter and protection system. We use an NTC Thermistor to limit the peak current during the initial charging of capacitors, avoiding overloads. This same topology can be found in computer AT/ATX power supplies, which demonstrates its effectiveness and reliability. 📚 Learn more: The EMI filter is essential to prevent noise generated by the switching of MOSFETs from returning to the power grid, interfering with other equipment. It also protects the power supply against external noise that could affect its operation. 🔌 Circuit Electrical Schematic In Figure 2, we present the complete schematic diagram of our Symmetrical SMPS Switched Power Supply, with power up to 350W using the IR2153 Integrated Circuit as PWM controller and IRF840 Power Transistors. This compact circuit is extremely functional and can be adapted for various applications. Fig 2 – Schematic Diagram Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840 🔍 Circuit analysis: The schematic shows a classic half-bridge configuration, where the IR2153 generates complementary PWM signals to drive the MOSFETs Q1 and Q2. The transformer TR1 receives these pulses and transfers them to the secondary, where they are rectified and filtered to produce the symmetrical output voltages. 🌀 Detailed Guide: Winding the Transformer The transformer TR1 is a critical component and was salvaged from a scrap ATX power supply. After rewinding, its primary inductance was approximately 6.4 mH, an ideal value for this application. ⚠️ Attention: The transformer core should not have an air gap. Some transformers from ATX power supplies have a gap spacing. If yours has one, you’ll need to sand the surfaces until this spacing is completely eliminated, ensuring full contact between the core halves. Primary Winding Process The primary winding consists of 40 turnsof 0.6 mm super enameled copper wire, configured without Center Tap (center point). Secondary Winding The secondary consists of a winding of 28 turns with Center Tap of 0.6 mm super enameled copper wire. This configuration will provide us with symmetrical voltages of approximately ±50V after rectification and filtering. Filtering Inductors The inductor L1 L2is the same one used in the original ATX power supply and does not require modifications. The inductors L3 and L4, from the output EMI filters, can be wound on ferrite toroidal cores. For the output inductors, we recommend winding the paired coils on the same toroidal cores, using 0.6 mm super enameled copper wire with 25 turns on each power terminal. This will ensure effective filtering and reduce output ripple. 💡 Practical tip: When winding the inductors, keep the wire always taut and distribute the turns evenly around the core. This will prevent heat buildup at specific points and improve the filter’s performance. 🔗 Related Content If you liked this project, you might also be interested in these other articles: Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 + PCB Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB How to Modify an ATX Power Supply to 13.6V, 22 Amperes Mini Switching Power Supply 5V – 24V, 3A using TNY268 with PCB 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC + PCB 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 + PCB How ATX Power Supplies Work: Learn to Diagnose Problems in 10 Simple Steps 🧾 Detailed Materials List To ensure the success of your project, the quality of components is essential. Below, we present the complete list of materials in an organized way, with clear specifications to facilitate your purchase and avoid errors. Reference Component Specification Notes CI1 Integrated Circuit IR2153 or IR2153D PWM Controller Q1, Q2 Mosfet Transistors IRF840 500V, 8A. Heat sink required. R1, R2 Resistor 150k (1/4W) Brown, green, yellow

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Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840
Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840

🌐 You can read this article in: Português | Español

🔧 Who this guide is for: This article is perfect for electronics students, enthusiasts, designers, and hobbyists who want to build a high-power (350W) SMPS switched power supply with excellent cost-benefit ratio. We’ll detail every step of the process, from theory to final assembly!

Hello Everyone!

In today’s post, we’ll dive into the fascinating world of SMPS (Switched-Mode Power Supply), exploring a project based on the IR2153 Integrated Circuit. This 8-pin PWM (Pulse Width Modulation) controller is a true gem for electronics, allowing us to build an excellent quality unregulated switched power supply for various applications.

What makes this project special is the combination of simplicity and performance. With a relatively low cost, we can obtain a robust symmetrical power supply capable of delivering up to 350W of power, ideal for powering audio amplifiers, laboratory power supplies, or other projects that require high symmetrical voltages.

💡 Expert tip: SMPS power supplies like this are up to 85% more efficient than traditional linear power supplies, generating less heat and taking up less space. This makes them ideal for portable applications or where space is limited.

⚡ Understanding the Power Stage

The power stage is the heart of our SMPS power supply, responsible for delivering the necessary energy for your applications. In this project, we use two N-type IRF840 MOSFET transistors, robust components widely available in the market, which receive the PWM pulses from the IR2153 integrated circuit.

The power supply for the IR2153 IC is provided through the 27K 5W power resistor. An important detail is that, in the internal package of this IR2153D IC, there is already a 15.6V Zener diode for protection. However, the current is limited, so we must be careful not to use a resistor R3 with lower resistance, as this would increase the current at the IC input, potentially damaging the Zener and, consequently, the IC.

Attention: If you are using the IR2153D (version with internal diode), there is no need to use the D2 (FR107 or BA159) diode, as this IC already has this component internally. If it’s the IR2153 “without the letter D”, keep the D2 diode as indicated in the schematic.

Blocking Filters and Protection

At the circuit input, we implement an EMI (Electromagnetic Interference) filter and protection system. We use an NTC Thermistor to limit the peak current during the initial charging of capacitors, avoiding overloads. This same topology can be found in computer AT/ATX power supplies, which demonstrates its effectiveness and reliability.

📚 Learn more: The EMI filter is essential to prevent noise generated by the switching of MOSFETs from returning to the power grid, interfering with other equipment. It also protects the power supply against external noise that could affect its operation.

🔌 Circuit Electrical Schematic

In Figure 2, we present the complete schematic diagram of our Symmetrical SMPS Switched Power Supply, with power up to 350W using the IR2153 Integrated Circuit as PWM controller and IRF840 Power Transistors. This compact circuit is extremely functional and can be adapted for various applications.

Schematic Diagram Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840
Fig 2 – Schematic Diagram Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840

🔍 Circuit analysis: The schematic shows a classic half-bridge configuration, where the IR2153 generates complementary PWM signals to drive the MOSFETs Q1 and Q2. The transformer TR1 receives these pulses and transfers them to the secondary, where they are rectified and filtered to produce the symmetrical output voltages.

🌀 Detailed Guide: Winding the Transformer

The transformer TR1 is a critical component and was salvaged from a scrap ATX power supply. After rewinding, its primary inductance was approximately 6.4 mH, an ideal value for this application.

⚠️ Attention: The transformer core should not have an air gap. Some transformers from ATX power supplies have a gap spacing. If yours has one, you’ll need to sand the surfaces until this spacing is completely eliminated, ensuring full contact between the core halves.

Primary Winding Process

The primary winding consists of 40 turnsof 0.6 mm super enameled copper wire, configured without Center Tap (center point).

Secondary Winding

The secondary consists of a winding of 28 turns with Center Tap of 0.6 mm super enameled copper wire. This configuration will provide us with symmetrical voltages of approximately ±50V after rectification and filtering.

Filtering Inductors

The inductor L1 L2is the same one used in the original ATX power supply and does not require modifications. The inductors L3 and L4, from the output EMI filters, can be wound on ferrite toroidal cores.

For the output inductors, we recommend winding the paired coils on the same toroidal cores, using 0.6 mm super enameled copper wire with 25 turns on each power terminal. This will ensure effective filtering and reduce output ripple.

💡 Practical tip: When winding the inductors, keep the wire always taut and distribute the turns evenly around the core. This will prevent heat buildup at specific points and improve the filter’s performance.

🔗 Related Content

🧾 Detailed Materials List

To ensure the success of your project, the quality of components is essential. Below, we present the complete list of materials in an organized way, with clear specifications to facilitate your purchase and avoid errors.

Reference Component Specification Notes
CI1 Integrated Circuit IR2153 or IR2153D PWM Controller
Q1, Q2 Mosfet Transistors IRF840 500V, 8A. Heat sink required.
R1, R2 Resistor 150k (1/4W) Brown, green, yellow
R3 Power Resistor 27K 5W Red, violet, orange. Do not use lower value!
R4 Resistor 10K (1/4W) Brown, black, orange
R5, R6 Resistor 10Ω (1/4W) Brown, black, black. MOSFET gates.
R7, R8 Resistor 22Ω2W Red, red, black. Discharges Snubber Cap.
D1 Diode Bridge GBJ2510 Input rectification. 1000v 25A.
D2 Fast Diode FR107 or BA159 Do not use with IR2153D (already has internal).
D3 à D6 Fast Diodes MUR460 Output rectification. 600V, 4A.
C1, C2 Polyester Capacitor 470nF – 250Vac Input EMI filter (X type).
C3, C4 Electrolytic Capacitor 680uF – 450V DC bus filter.
C5, C7 Electrolytic Capacitor 100uF – 50V IC power supply (bootstrap).
C6 Ceramic Capacitor 470pF Sets the oscillation frequency.
C8 Polyester Capacitor 2.2uF – 400V Transformer primary coupling.
C9, C10 Electrolytic Capacitor 2200uF – 65V Output filter. Use low ESR.
C11, C12 MKP Ceramic 1nF – 1000V RC Snubber
P1 Potentiometer 100kΩ Fine frequency adjustment (optional).
NTC1 Thermistor 5Ω Inrush current protection.
L1, L2, L3, L4 Inductors *See details in text EMI and output filters.
TR1 Transformer *See details in text EE or EI core from ATX power supply.
F1 Fuse 3A (solderable) Main overcurrent protection.

🖨️ Printed Circuit Board (PCB) – Optimized Design

To facilitate your assembly and ensure maximum performance and safety, we have prepared a professionally designed printed circuit board (PCB). The layout was optimized to:

  • Wide Traces: To support high currents without overheating.
  • Adequate Separation: Safe distance between high voltage and low voltage parts.
  • Thermal Planning: Strategic positioning of heat-dissipating components.
  • Compatibility: Standard drilling for the listed components.
We are making available for Download all the necessary materials for those who want to assemble with the suggested board: files in webp, PDF for home printing and Gerber files for those who want to send for professional manufacturing.
PCB Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840
Fig. 3 – PCB Symmetrical SMPS 2×50V 350W Using IR2153 and IRF840

📥 Download the Project Files Now!

To download the necessary files for assembling the electronic circuit, simply click on the direct link provided below:

Download Link:PCB Layout, PDF, GERBER, JPG

🤔 Frequently Asked Questions (FAQ) – IR2153 IRF840 Symmetrical SMPS Power Supply

To ensure your project is a success, we’ve compiled some of the most common questions about the IR2153 and IRF840 Symmetrical Switch-Mode Power Supply.

❓ Can I use this power supply for an audio amplifier? 🔽

Yes, this power supply is excellent for audio amplifiers that require a symmetrical supply, such as class AB or D amplifiers. The low ripple and high current capacity ensure superior sound quality.

❓ What should I do if the power supply doesn’t turn on? 🔽

First, check the F1 fuse. Then, with the power supply disconnected from the mains, measure the continuity of the main components. A common mistake is a faulty transformer winding or cold solder joints on the MOSFETs and the IC. Use a lamp in series with the input for a safe test.

❓ Is it necessary to add a fan for cooling? 🔽

For operations at powers close to 350W or for long periods, it is highly recommended. A small 12V fan can be powered by the supply itself (with a 7812 regulator, for example) to keep the MOSFETs and transformer at a safe temperature.

🎉 Conclusion and Next Steps

We’ve reached the end of this complete guide for building your 350W Symmetrical SMPS Switched Power Supply. With this project, you not only build a powerful tool for your applications but also deepen your knowledge in power electronics, a fundamental and rewarding area.

Always remember to prioritize safety, working carefully and using appropriate protective equipment. The assembly of switched power supplies involves high voltages and can be dangerous if handled incorrectly.

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

Your Feedback is Invaluable:

Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community.

If you found this guide helpful, spread the knowledge!

🔗 Share This Guide

Best regards,

The ElCircuits Team ⚡

O post Symmetrical SMPS Switched Power Supply with IR2153 and IRF840 – Complete Guide 2x50V 350W + PCB apareceu primeiro em Electronic Circuits.

]]> https://www.elcircuits.com/symmetrical-smps-ir2153-irf840-2x50v-350w-pcb/feed/ 0 Convert an ATX Power Supply to 13.6V 22A – Step-by-Step Guide https://www.elcircuits.com/convert-atx-power-supply-to-13v6-22a/ https://www.elcircuits.com/convert-atx-power-supply-to-13v6-22a/#respond Sat, 18 Oct 2025 18:56:00 +0000 https://elcircuits.com/how-to-modify-an-atx-power-supply-to-13-6v-22-amperes-complete-step-by-step-guide/ Modifying ATX Power Supply PS-350WXMH to provide 13.6V 🌐 You can read this article in: Português | Español Hello, electronics enthusiasts! Whether you’re an engineer, electronics technician, designer, or hobbyist, an adjustable bench power supply is an indispensable tool in any workspace. The problem? Quality commercial power supplies tend to be expensive and, often, limited in current. But what if I told you that you can build your own robust bench power supply with 6 amperes of current and adjustable voltage from 1.25V to 33V for a fraction of the cost? Keep reading to find out how! 🧐 Why Build Your Own Bench Power Supply? Professional bench power supplies are essential for testing and developing electronic projects, but the market offers options with two main limitations: low maximum current and high prices. Quality models easily exceed R$500.00, making them inaccessible for many students and enthusiasts. This is exactly where our project shines! We’ve developed a fantastic module that offers: Adjustable voltage: 1.25V to 33V Robust current: Up to 6 continuous amperes Short-circuit protection Thermal protection Affordable cost and easy-to-find materials 📝 Required Materials To build this adjustable bench power supply, we’ll use components that are easy to acquire and affordable. Many of them can be salvaged from old ATX power supplies! Fig. 2 – Materials needed for the voltage regulator circuit Component List: 2x LM350 ICs – 3A voltage regulators each 2x 220Ω Resistors (colors: Red, Red, Brown) 1x 5KΩ Potentiometer (preferably multi-turn for greater precision) 1x SCHOTTKY S16C45C Barrier Rectifier (16A) or alternatives 1x Universal printed circuit board or perfboard Heat sink (can be salvaged from an ATX power supply) Thermal insulators for ICs and rectifier 💡 Expert Tip: Don’t have a S16C45C rectifier? No problem! You can replace it with two common diodes, connecting anodes to the output of each LM and joining the cathodes to form a single output, as shown in the schematic. 🛠️ Step-by-Step Assembly Now that we have all the components in hand, let’s start the assembly! Follow each step carefully to ensure the correct and safe operation of your module. Step 1: Component Preparation Start by mounting the two LM350 ICs and the SCHOTTKY rectifier on the heat sink. Attention: Don’t forget to use thermal insulators between each component and the heat sink to avoid short circuits! Fig. 3 – Components mounted on heat sink with thermal insulators Step 2: Board Assembly With the components already mounted on the heat sink, fit them onto the printed circuit board. Follow the schematic to make the correct connections. The layout of components can be adapted according to your preference, as long as you maintain the correct connections. Step 3: Resistor Connection Solder the two 220Ω resistors as indicated in the schematic. They are essential for the correct operation of the regulator circuit. Fig. 4 – Schematic Diagram Adjustable Power Supply Module 1.25V to 33V, 6A Step 4: Potentiometer Installation The voltage control potentiometer will not be soldered directly to the board. Instead, we recommend installing it remotely on the front panel of your power supply. To facilitate assembly and disassembly, we’ll use a two-pin connector. 💡 Expert Tip: For greater precision in voltage adjustment, consider using a multi-turn potentiometer. They allow for finer adjustments, essential for applications that require specific voltages. Step 5: Soldering Connections With all components properly positioned, proceed with soldering all connections. Make sure There are no solder bridges or cold joints that could compromise the circuit’s operation. Fig. 5 – Soldering all connections on the universal board Step 6: Remote Potentiometer Connection Use a cable with a two-pin male connector to connect the potentiometer. This will facilitate the final assembly of your bench power supply, allowing the potentiometer to be installed on the front panel while the regulator module remains inside. Fig. 6 – Cable with connector for remote potentiometer connection 🏋️‍♀️ Want More Power? Expand to 12 Amperes! For those who think 6A is still not enough, we have excellent news! With a simple modification, it’s possible to double the current capacity to an impressive 12 amperes. The secret? Simply build two identical modules to this one and connect them in parallel. This way, you’ll have an extremely powerful bench power supply, maintaining all protections (short-circuit and thermal) and precise voltage regulation. ⚠️ Safety Warning: When working with high currents like 12A, make sure to use appropriate wires and connectors for this capacity. High currents generate more heat and require greater care with thermal dissipation. 💡 Testing and Validation Before powering your module, it’s essential to perform some safety checks: Confirm that the ICs and rectifier are properly insulated from the heat sink Check for short circuits on the board traces Test the continuity of the main connections With everything verified, let’s connect a power supply. In our example, we used a 24V supply. Remember that the maximum output voltage will be limited by the input voltage minus the voltage drop across the components (approximately 1.95V). Load Test To validate our module under real conditions, we used as a load a car headlight halogen lamp (55W, 12V). According to Ohm’s Law, this lamp consumes approximately 4.58A (55W ÷ 12V). Fig. 7 – Load test with 55W halogen lamp We adjusted the voltage to 13.52V (typical voltage of a car with an alternator running) and connected the load. The result? Excellent stability, with a voltage drop of only 0.4V under a load of 4.58A! Fig. 8 – Load test with 55W halogen lamp 🔗 Related Content If you liked this project, you might also be interested in these other articles: Adjustable Power Supply 1.25v to 57V, 6 Amps with TIP36C + LM317HV + PCB Adjustable Power Supply 1.25v to 33V, 3 Amps with LM350 + PCB Stabilized Power Supply 13.8V High Current 10 Amps with PCB Adjustable Power Supply 1.2V to 37V High Current 20A with LM317 and TIP35C + PCB Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB Adjustable Power Supply 1.2V to 37V,

O post Convert an ATX Power Supply to 13.6V 22A – Step-by-Step Guide apareceu primeiro em Electronic Circuits.

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Modifying ATX Power Supply PS-350WXMH to provide 13.6V - elcircuits.com

Modifying ATX Power Supply PS-350WXMH to provide 13.6V

🌐 You can read this article in: Português | Español

Hello, electronics enthusiasts!

Whether you’re an engineer, electronics technician, designer, or hobbyist, an adjustable bench power supply is an indispensable tool in any workspace. The problem? Quality commercial power supplies tend to be expensive and, often, limited in current. But what if I told you that you can build your own robust bench power supply with 6 amperes of current and adjustable voltage from 1.25V to 33V for a fraction of the cost? Keep reading to find out how!

🧐 Why Build Your Own Bench Power Supply?

Professional bench power supplies are essential for testing and developing electronic projects, but the market offers options with two main limitations: low maximum current and high prices. Quality models easily exceed R$500.00, making them inaccessible for many students and enthusiasts.

This is exactly where our project shines! We’ve developed a fantastic module that offers:

  • Adjustable voltage: 1.25V to 33V
  • Robust current: Up to 6 continuous amperes
  • Short-circuit protection
  • Thermal protection
  • Affordable cost and easy-to-find materials

📝 Required Materials

To build this adjustable bench power supply, we’ll use components that are easy to acquire and affordable. Many of them can be salvaged from old ATX power supplies!

Materials needed for the voltage regulator circuit

Fig. 2 – Materials needed for the voltage regulator circuit

Component List:

  • 2x LM350 ICs – 3A voltage regulators each
  • 2x 220Ω Resistors (colors: Red, Red, Brown)
  • 1x 5KΩ Potentiometer (preferably multi-turn for greater precision)
  • 1x SCHOTTKY S16C45C Barrier Rectifier (16A) or alternatives
  • 1x Universal printed circuit board or perfboard
  • Heat sink (can be salvaged from an ATX power supply)
  • Thermal insulators for ICs and rectifier

💡 Expert Tip: Don’t have a S16C45C rectifier? No problem! You can replace it with two common diodes, connecting anodes to the output of each LM and joining the cathodes to form a single output, as shown in the schematic.

🛠️ Step-by-Step Assembly

Now that we have all the components in hand, let’s start the assembly! Follow each step carefully to ensure the correct and safe operation of your module.

Step 1: Component Preparation

Start by mounting the two LM350 ICs and the SCHOTTKY rectifier on the heat sink. Attention: Don’t forget to use thermal insulators between each component and the heat sink to avoid short circuits!

Components mounted on heat sink with thermal insulators

Fig. 3 – Components mounted on heat sink with thermal insulators

Step 2: Board Assembly

With the components already mounted on the heat sink, fit them onto the printed circuit board. Follow the schematic to make the correct connections. The layout of components can be adapted according to your preference, as long as you maintain the correct connections.

Step 3: Resistor Connection

Solder the two 220Ω resistors as indicated in the schematic. They are essential for the correct operation of the regulator circuit.

Schematic Diagram Adjustable Power Supply Module 1.25V to 33V, 6A

Fig. 4 – Schematic Diagram Adjustable Power Supply Module 1.25V to 33V, 6A

Step 4: Potentiometer Installation

The voltage control potentiometer will not be soldered directly to the board. Instead, we recommend installing it remotely on the front panel of your power supply. To facilitate assembly and disassembly, we’ll use a two-pin connector.

💡 Expert Tip: For greater precision in voltage adjustment, consider using a multi-turn potentiometer. They allow for finer adjustments, essential for applications that require specific voltages.

Step 5: Soldering Connections

With all components properly positioned, proceed with soldering all connections. Make sure There are no solder bridges or cold joints that could compromise the circuit’s operation.

Soldering all connections on the universal board

Fig. 5 – Soldering all connections on the universal board

Step 6: Remote Potentiometer Connection

Use a cable with a two-pin male connector to connect the potentiometer. This will facilitate the final assembly of your bench power supply, allowing the potentiometer to be installed on the front panel while the regulator module remains inside.

Cable with connector for remote potentiometer connection

Fig. 6 – Cable with connector for remote potentiometer connection

🏋️‍♀️ Want More Power? Expand to 12 Amperes!

For those who think 6A is still not enough, we have excellent news! With a simple modification, it’s possible to double the current capacity to an impressive 12 amperes.

The secret? Simply build two identical modules to this one and connect them in parallel. This way, you’ll have an extremely powerful bench power supply, maintaining all protections (short-circuit and thermal) and precise voltage regulation.

⚠️ Safety Warning: When working with high currents like 12A, make sure to use appropriate wires and connectors for this capacity. High currents generate more heat and require greater care with thermal dissipation.

💡 Testing and Validation

Before powering your module, it’s essential to perform some safety checks:

  1. Confirm that the ICs and rectifier are properly insulated from the heat sink
  2. Check for short circuits on the board traces
  3. Test the continuity of the main connections

With everything verified, let’s connect a power supply. In our example, we used a 24V supply. Remember that the maximum output voltage will be limited by the input voltage minus the voltage drop across the components (approximately 1.95V).

Load Test

To validate our module under real conditions, we used as a load a car headlight halogen lamp (55W, 12V). According to Ohm’s Law, this lamp consumes approximately 4.58A (55W ÷ 12V).

Load test with 55W halogen lamp

Fig. 7 – Load test with 55W halogen lamp

We adjusted the voltage to 13.52V (typical voltage of a car with an alternator running) and connected the load. The result? Excellent stability, with a voltage drop of only 0.4V under a load of 4.58A!

Load test with 55W halogen lamp

Fig. 8 – Load test with 55W halogen lamp

🔗 Related Content

📥 Download Files

Direct link: Download Files

🧾 Conclusion

Our 6A adjustable bench power supply project demonstrates that it’s possible to build quality equipment with low cost and high efficiency. The simplicity of the circuit, combined with the robustness of the components used, results in a reliable and versatile power supply for various applications.

Whether for testing prototypes, powering circuits during development or for use in your home laboratory, this adjustable bench power supply will certainly meet your needs with excellent performance and stability.

Detailed Video

For those who would like more details about the assembly process and testing, we’ve prepared a complete video on our YouTube channel. In it, we show each step in detail and share additional tips:

🤔 FAQ: Winget Upgrade Command – Common Questions Answered

The Windows Package Manager, Winget, is a powerful tool, but it’s normal to have questions. Below, we’ve answered the most frequently asked questions to help you master the winget upgrade command.

❓ What is Winget and why should I use it to update apps?🔽

Winget (Windows Package Manager) is an official command-line tool from Microsoft to install, configure, update, and remove software on Windows. Using it to update apps is efficient, fast, and automates the process, avoiding the need to check for updates for each program individually.

❓ What’s the difference between winget upgrade and winget update?🔽

In the context of Winget, the upgrade and update commands are functionally identical. Both are used to update installed packages to their latest versions. The upgrade command is the more common and traditionally used term, but update was added as an alias for greater clarity and consistency with other package managers. You can use either one.

❓ How do I update ALL my apps at once?🔽

To update all apps managed by Winget that have a newer version available, use the command: winget upgrade –all Winget will list the found packages and ask for your confirmation before proceeding with the update for each one.

❓ The winget upgrade –all command asks for confirmation for each app. How can I automate this?🔽

To run the update for all apps without needing confirmation for each one, add the –all flag along with the –accept-package-agreements and –accept-source-agreements flags. The full command is: winget upgrade –all –accept-package-agreements –accept-source-agreements This is useful for scripts and scheduled tasks.

❓ How do I update a specific app instead of all of them?🔽

First, find the exact ID of the app with winget list. Then, use the winget upgrade command followed by the app’s name or ID. For example, to update Visual Studio Code, the command would be: winget upgrade Microsoft.VisualStudioCode

❓ Why are some apps not updated with winget upgrade –all?🔽

This can happen for a few reasons: 1. The app was not installed via Winget. 2. The Winget repository (source) that manages that app may not have information on a newer version. 3. The app might have been installed with an installer that does not support silent or automatic updates. 4. There might be a conflict, or the app is in use.

❓ What does the error ‘No installed package found matching input criteria’ mean?🔽

This error means that Winget could not find any installed application that matches the name or ID you provided. Check if the app name is typed correctly or use winget list to find the exact name as Winget recognizes it.

❓ Is it possible to exclude a specific app from updating when using –all?🔽

Yes. You can use the –exclude flag to ignore one or more apps. For example, to update everything except ‘Microsoft.PowerToys’, the command would be: winget upgrade –all –exclude Microsoft.PowerToys You can list multiple apps by separating them with commas.

❓ How can I see which apps need to be updated before running the upgrade?🔽

Use the command winget upgrade. Without the –all flag, it will list all apps that have available updates but will not update them. It’s a great way to check what will be changed before confirming the action.

❓ Does Winget work in Windows PowerShell and CMD?🔽

Yes, Winget works perfectly in both the Command Prompt (CMD) and Windows PowerShell. It is also compatible with Windows Terminal and the Windows Subsystem for Linux (WSL), allowing you to manage your Windows applications from the Linux environment.

Original article published on FVML (Portuguese) – December 13, 2018

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

Your Feedback is Invaluable:

Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community.

If you found this guide helpful, spread the knowledge!

🔗 Share This Guide

Best regards, The ElCircuits Team ⚡

O post Convert an ATX Power Supply to 13.6V 22A – Step-by-Step Guide apareceu primeiro em Electronic Circuits.

]]> https://www.elcircuits.com/convert-atx-power-supply-to-13v6-22a/feed/ 0 Mini Switching Power Supply 5V–25V 3A Using TNY268 – With PCB https://www.elcircuits.com/mini-switching-power-supply-5v-25v-3a-tny268/ https://www.elcircuits.com/mini-switching-power-supply-5v-25v-3a-tny268/#respond Fri, 14 Apr 2023 17:36:00 +0000 https://elcircuits.com/mini-switching-power-supply-5v-25v-3a-using-tny268-and-pcb/ Mini Switching Power Supply 5V – 25V, 3A with TNY268 and PCB 🌐 You can read this article in: Português|Español Compact 3A Mini Switching Power Supply: Build Your Own 5V-25V Solution with TNY268 and PCB Hello, electronics enthusiasts! In this article, we will be discussing a mini switched power supply that provides 5V to 25Vdc output. This power supply is perfect for various electronic devices that require a stable and reliable power supply. This is a power supply based on the TNY268 Integrated Circuit, which is part of a series of TinySwitch-II circuits: TNY263, TNY264, TNY265, TNY266, TNY267 and TNY268. For a Flyback-type switched power supply like the one proposed, this IC is ideal, it integrates in its encapsulation the components necessary for it to work: PWM Control, Power Mosfets Overcurrent Protection Over-Temperature Protection Self-Feeding System It does not need auxiliary windings, which makes it a complete IC, with DIP8 encapsulation, with a PWM working frequency of 132kHz and a voltage of up to 700V. We will dive into the technical specifications, design, and features of this power supply and how it compares to other similar products in the market. 📖 Technical Specifications The mini switched power supply has an input voltage range of 80V to 260V AC, which makes it suitable for use in different parts of the world. It provides an output voltage that can be regulated between 5V to 25V, with a current of up to 3A, depending on the configuration that we choose. The power supply also has short-circuit protection and overvoltage protection, ensuring the safety of the connected devices. ℹ️ Design The mini switched power supply has a compact design, with dimensions of 55mm x 26mm x 21mm. The power supply is enclosed in a plastic case that protects the circuitry from dust and other environmental factors. The power supply has a standard WJ2EDGVC-5.08-2P connector, making it easy to connect different electronic devices. ⚠️ Caution!⚠️ “This circuit works directly connected to the electrical network, this is extremely dangerous, any carelessness, or wrong connections, design error, or any other occasion, can lead to irreversible damage. We are not responsible for any type of occurrence. If you don’t have enough experience, don’t build this circuit, and if you build it, when testing it, be sure to have the proper protections and be accompanied by someone else.” 🛠️ Features One of the standout features of this mini switched power supply is its efficiency. It has a high efficiency rating of up to 85%, which means that it wastes less energy as heat compared to other similar products. This feature is especially important for electronic devices that are battery-powered, as it helps to extend their battery life. Another feature of this power supply is its low ripple and noise. The power supply has a ripple voltage of less than 50mV, which ensures that the connected devices receive a stable and noise-free power supply. This is especially important for audio devices, where any noise in the power supply can cause unwanted noise in the audio output. 🧷 TNY268 – Pinout and Description The TNY268 is packaged in a DIP-8B structure for perforated pinouts and an SMD-8B package for SMD. The package is similar to the well-known IC LM555, with the exception of pin 6 hidden in the TNY268, as we can see in the pinout of Figure 2, below. Fig. 2 -Pinout TNY268 🧮 We leave below the description of each pin of the TNY268 Integrated Circuit to facilitate our understanding. DRAIN (D): Power MOSFET drain connection. Provides internal operating current for start-up and steady-state operation. BYPASS (BP): Connection point for an external 0.1 µF bypass capacitor for the internally generated 5.8 V supply. ENABLE/UNDERVOLTAGE (EN/UV): This pin has two functions: input enable and line undervoltage detection. During normal operation, power MOSFET switching is controlled by this pin. MOSFET switching is terminated when a current greater than 240 μA is drawn from this pin.This pin also detects line undervoltage conditions through an external resistor connected to the DC line voltage. If there is no external resistor connected to this pin, TinySwitch-II detects its absence and disables the line undervoltage function. SOURCE (S): Common control circuit, connected internally to the output MOSFET source. SOURCE (HV RTN): MOSFET source connection output for high voltage feedback. 🔌 The Switched Power Supply Circuit The Mini Switched Power Supply Circuit with TNY268 for 5V – 24V, 3A output is a simple yet powerful design, as shown in Figure 3 below. However, due to the involvement of electricity, it requires careful handling and at least intermediate knowledge of electronics to assemble the circuit. Fig. 3 – Schematic Diagram Mini Switching Power Supply 5V – 25V, 3A with TNY268 The schematic diagram of the Mini Switched Power Supply Circuit is well laid out and easy to understand. It includes a TNY268 controller that regulates the output voltage and current of the power supply. The circuit has a few essential components such as capacitors, resistors, diodes, and an inductor, which work together to provide stable and efficient power. 🔗 Related Content   If you liked this project, you might also be interested in these other articles: Symmetrical SMPS Switched Power Supply with IR2153 and IRF840 – 2x50V 350W + PCB Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 + PCB Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB How to Modify an ATX Power Supply to 13.6V, 22 Amperes 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC + PCB 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 + PCB How ATX Power Supplies Work: Learn to Diagnose Problems in 10 Simple Steps 🔧 Regulate The Output Voltage The output voltage is adjusted through two parameters in the circuit: The D4 diode, which is a 1W Power Zener diode. The secondary winding of the transformer. 📌 The Zener Diode The zener diode D4, is the diode that will adjust the output voltage, we must configure it as follows, when

O post Mini Switching Power Supply 5V–25V 3A Using TNY268 – With PCB apareceu primeiro em Electronic Circuits.

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Mini Switching Power Supply 5V - 25V, 3A with TNY268 and PCB - Elcircuits

Mini Switching Power Supply 5V – 25V, 3A with TNY268 and PCB

🌐 You can read this article in: Português|Español

Compact 3A Mini Switching Power Supply: Build Your Own 5V-25V Solution with TNY268 and PCB

Hello, electronics enthusiasts!

In this article, we will be discussing a mini switched power supply that provides 5V to 25Vdc output. This power supply is perfect for various electronic devices that require a stable and reliable power supply.

This is a power supply based on the TNY268 Integrated Circuit, which is part of a series of TinySwitch-II circuits: TNY263, TNY264, TNY265, TNY266, TNY267 and TNY268.

For a Flyback-type switched power supply like the one proposed, this IC is ideal, it integrates in its encapsulation the components necessary for it to work:

  • PWM Control, Power Mosfets
  • Overcurrent Protection
  • Over-Temperature Protection
  • Self-Feeding System

It does not need auxiliary windings, which makes it a complete IC, with DIP8 encapsulation, with a PWM working frequency of 132kHz and a voltage of up to 700V.

We will dive into the technical specifications, design, and features of this power supply and how it compares to other similar products in the market.

📖 Technical Specifications

The mini switched power supply has an input voltage range of 80V to 260V AC, which makes it suitable for use in different parts of the world.

It provides an output voltage that can be regulated between 5V to 25V, with a current of up to 3A, depending on the configuration that we choose.

The power supply also has short-circuit protection and overvoltage protection, ensuring the safety of the connected devices.

ℹ️ Design

The mini switched power supply has a compact design, with dimensions of 55mm x 26mm x 21mm. The power supply is enclosed in a plastic case that protects the circuitry from dust and other environmental factors.

The power supply has a standard WJ2EDGVC-5.08-2P connector, making it easy to connect different electronic devices.

⚠️ Caution!⚠️

“This circuit works directly connected to the electrical network, this is extremely dangerous, any carelessness, or wrong connections, design error, or any other occasion, can lead to irreversible damage. We are not responsible for any type of occurrence. If you don’t have enough experience, don’t build this circuit, and if you build it, when testing it, be sure to have the proper protections and be accompanied by someone else.”

🛠️ Features

One of the standout features of this mini switched power supply is its efficiency. It has a high efficiency rating of up to 85%, which means that it wastes less energy as heat compared to other similar products.

This feature is especially important for electronic devices that are battery-powered, as it helps to extend their battery life.

Another feature of this power supply is its low ripple and noise. The power supply has a ripple voltage of less than 50mV, which ensures that the connected devices receive a stable and noise-free power supply.

This is especially important for audio devices, where any noise in the power supply can cause unwanted noise in the audio output.

🧷 TNY268 – Pinout and Description

The TNY268 is packaged in a DIP-8B structure for perforated pinouts and an SMD-8B package for SMD. The package is similar to the well-known IC LM555, with the exception of pin 6 hidden in the TNY268, as we can see in the pinout of Figure 2, below.
Pinout - Pinout TNY268 - Elcircuits

Fig. 2 -Pinout TNY268

🧮 We leave below the description of each pin of the TNY268 Integrated Circuit to facilitate our understanding.

  • DRAIN (D): Power MOSFET drain connection. Provides internal operating current for start-up and steady-state operation.
  • BYPASS (BP): Connection point for an external 0.1 µF bypass capacitor for the internally generated 5.8 V supply.
  • ENABLE/UNDERVOLTAGE (EN/UV): This pin has two functions: input enable and line undervoltage detection. During normal operation, power MOSFET switching is controlled by this pin. MOSFET switching is terminated when a current greater than 240 μA is drawn from this pin.This pin also detects line undervoltage conditions through an external resistor connected to the DC line voltage. If there is no external resistor connected to this pin, TinySwitch-II detects its absence and disables the line undervoltage function.
  • SOURCE (S): Common control circuit, connected internally to the output MOSFET source.
  • SOURCE (HV RTN): MOSFET source connection output for high voltage feedback.

🔌 The Switched Power Supply Circuit

The Mini Switched Power Supply Circuit with TNY268 for 5V – 24V, 3A output is a simple yet powerful design, as shown in Figure 3 below. However, due to the involvement of electricity, it requires careful handling and at least intermediate knowledge of electronics to assemble the circuit.
Schematic Diagram Mini Switching Power Supply 5V - 25V, 3A with TNY268 - Elcircuits

Fig. 3 – Schematic Diagram Mini Switching Power Supply 5V – 25V, 3A with TNY268

The schematic diagram of the Mini Switched Power Supply Circuit is well laid out and easy to understand. It includes a TNY268 controller that regulates the output voltage and current of the power supply. The circuit has a few essential components such as capacitors, resistors, diodes, and an inductor, which work together to provide stable and efficient power.

🔗 Related Content

 

🔧 Regulate The Output Voltage

The output voltage is adjusted through two parameters in the circuit:

  • The D4 diode, which is a 1W Power Zener diode.
  • The secondary winding of the transformer.

📌 The Zener Diode

The zener diode D4, is the diode that will adjust the output voltage, we must configure it as follows, when the desired voltage is Xv, the zener diode must have a voltage Xv – 1. The diode should be 1V lower than the nominal voltage of the power supply, this lower voltage is due to the photocoupler being connected in series with the zener diode, and since it is an “LED” diode, we have the voltage drop on it.

💡 For example:

To obtain a voltage of 5V at the power supply output:
  • The zener diode D4 = 4V. We use a commercial 4.3V, 1N4731 zener diode.
To obtain a voltage of 9V at the power supply output:
  • The zener diode D4 = 8V. We use a commercial 8.2V, 1N4738 zener diode.
To obtain a voltage of 12V at the power supply output:
  • The zener diode D4 = 11V. We use a commercial 11V, 1N4741 zener diode.
To obtain a voltage of 25V at the power supply output:
  • The zener diode D4 = 24V. We use a commercial 24V, 1N4749 zener diode.

🌀 The Transformer

The transformer used in this circuit was a high frequency transformer, often found in PC power supplies, as illustrated in Figure 4 below, a model EE-25 Ferrite transformer.
4 EE-25 Ferrite Transformer - Elcircuits

Fig. 4 EE-25 Ferrite Transformer

✔️ Primary coil winding

The primary will be wound to support a voltage between 85V and 260V, and this will be done by winding 140 turns of 33AWG enamelled wire, or 0.18 mm diameter wire.

Right after winding the primary, place appropriate insulation tape, with electrical and thermal insulation, to insulate the primary from the secondary.

✔️ Secondary coil winding

The secondary will be wound according to the desired output voltage, and this will be done in such a way that, for each desired 1V, 1.4 turns of 17AWG enameled wire or 1.15 mm wire are wound.

👉 The calculation for an output voltage of 5V can be achieved using the formula below:

Formula: N = V * F
  • N = Number of Turns
  • V = Desired Voltage
  • C = Constant = 1.4
  • V = 5V
  • C = 1.4
  • N = ?
  • N = 5 * 1.4
  • N = 7 laps
For 5V on the output, we have 7 turns to wind in the secondary.

👉 The calculation for an output voltage of 9V:

  • V = 9V
  • F = 1.4
  • N = ?
  • N = 9 * 1.4
  • N = 12.6 = ~13 Rounds
For 9V on the output, we have 13 turns to wind in the secondary.

👉 The calculation for an output voltage of 12V:

  • V = 12V
  • F = 1.4
  • N = ?
  • N = 12 * 1.4
  • N = 16.8 = ~17 Rounds
For 12V output, we have 17 turns to wind in the secondary.

👉 The calculation for an output voltage of 24V:

  • V = 25V
  • F = 1.4
  • N = ?
  • N = 25 * 1.4
  • N = 35 Turns

For 24V output, we have 37 turns to wind in the secondary.

The good thing is that with the formula, we can calculate any voltage we want to get at the output of our switching power supply.

🧾 Bill of Materials

Semiconductor

  • U1 ……… Integrated Circuit TNY268P
  • OPT……. TLP181 Opto-Coupler
  • D1, D2 … Diode 1N4007
  • D3 ……… Fast Diode FR307
  • D4 ……… Zener Diode *See Text

Resistor

  • R1 …. Resistor 10Ω / 1W (brown, black, black, gold)
  • R2 …. Resistor 200KΩ / 1/4W (red, black, yellow, gold)
  • R3 …. Resistor 470Ω / 1/4W (yellow, violet, brown, gold)

Capacitors

  • C1 ……. Electrolytic Capacitor 47uF/400V
  • C2 ……. Polyester Capacitor 2.2nF
  • C3 ……. Polyester Capacitor 100nF
  • C4 ……. Electrolytic Capacitor 470uF/35V

Several

  • T1 ……… EE-25 Ferrite Transformer
  • P1, P2 … Connector WJ2EDGVC-5.08-2P
  • Others… PCI, Wires, Solders, Etc.

🖨️ Printed Circuit Board (PCB) – Download

In Figure 5 below, we are making the PCI available in GERBER, PDF and JPEG files, for those who want to create a more optimized assembly, either at home, or if you prefer, at a company that prints the board.
PCB-Mini Switching Power Supply 5V - 25V, 3A with TNY268 - Elcircuits

Fig. 5 – PCB-Mini Switching Power Supply 5V – 25V, 3A with TNY268

📥 Files to Download, Direct Link:

Click on the link beside: GERBER, PDF and PNG files

🧾 Conclusion

In conclusion, the mini switched power supply that provides a programable 5V to 25Vdc output is an excellent choice for various electronic devices. Its compact design, high efficiency, and low ripple and noise make it stand out compared to other similar products in the market.

Its safety features, such as short-circuit protection and overvoltage protection, ensure that connected devices are protected from damage. If you are looking for a reliable and efficient power supply for your electronic devices, then this mini switched power supply is a great choice.

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

Your Feedback is Invaluable:

Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community.

If you found this guide helpful, spread the knowledge!

🔗 Share This Guide

Best regards,

The ElCircuits Team ⚡

O post Mini Switching Power Supply 5V–25V 3A Using TNY268 – With PCB apareceu primeiro em Electronic Circuits.

]]> https://www.elcircuits.com/mini-switching-power-supply-5v-25v-3a-tny268/feed/ 0 5A Step-Down Converter 1.22V-26V Using RT8289 IC – With PCB https://www.elcircuits.com/step-down-converter-1v22-26v-5a-rt8289/ https://www.elcircuits.com/step-down-converter-1v22-26v-5a-rt8289/#respond Wed, 22 Jun 2022 10:29:00 +0000 https://elcircuits.com/5a-1-22v-to-26v-500khz-step-down-converter-using-rt8289-ic-with-pcb/ Fig. 1 – 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC with PCB Powerful 5A Step-Down Converter: Build a Versatile 1.22V to 26V Solution at 500kHz with RT8289 IC and PCB This is a DC-DC 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC, it works with a Step-Down conversion system. This powerful chip manages to work with very few external components and provides a preset voltage between 1.22V to 26V, with 5 Amps of output current. 📖 General IC Description The RT8289 is a step-down regulator with an internal Power MOSFET. It achieves 5A of continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. The RT8289 provides protections such as cycle-by-cycle current limiting and thermal shutdown. In shutdown mode, the regulator draws 25μA of supply current. The RT8289 requires a minimum number of external components, to provide a compact solution. The RT8289 is available in a SOP-8 (Exposed Pad) package. 🛠️ Features High Output Current up to 5A Internal Soft-Start 100mΩ Internal Power MOSFET Switch Internal Compensation Minimizes External Parts Count High Efficiency up to 90% 25μA Shutdown Current Fixed 500kHz Frequency Thermal Shutdown Protection Cycle-by-Cycle Over Current Protection Wide 5.5V to 32V Operating Input Range Adjustable Output Voltage from 1.222V to 26V Available in an SOP-8 (Exposed Pad) Package RoHS Compliant and Halogen Free ⚡ Output Voltage Setting To define the output voltage, we use a voltage divider formed by 2 resistors, R1 and R2, this allows the FB pin of the integrated circuit to detect changes in the output voltage, and recalibrate the circuit keeping it stabilized. To set this output voltage, we can calculate the external resistive divider, according to the equation formulated below: VOUT = VREF *(1 + (R1/R2)) Where VREF is the reference voltage (type 1.222V). Where R1 = 10kΩ. We exemplify in our circuit, the voltage divider is formed by R1 and R2. ✔️ General Formula: VOUT = VREF *(1 + R1/R2) Where VREF is the reference voltage (type 1.222V). Where R1 = 10kΩ. ✔️ For a 3.3V output, our formula would look like: Vout = 1,222 * (1+ (10/5.8)) Vout = 3.328V ✔️ For a 5V output, our formula would look like: Vout = 1,222 * (1+ (10/3.16)) Vout = 5,089V ✔️ For a 9V output, our formula would look like: Vout = 1,222 * (1+ (10/1.57)) Vout = 9,005V ✔️ For a 12V output, our formula would look like: Vout = 1,222 * (1+ (10/1.13)) Vout = 12,036V ✔️ For a 26V output, our formula would look like: Vout = 1,222 * (1+ (10/0.493)) Vout = 26,009V We may be using a trimpot instead of R2, this allows you to vary the output voltage through the Trimpot. 🔌 The Circuit Schematic In Figure 2, below, we can see the schematic diagram of the Low Noise and High Frequency 5A DC-DC Step-Down Converter. All circuit components are SMD, except the terminal blocks, “optional”, you can solder directly to the board. This type of SMD circuit is great to be implemented in miniaturized circuits. It is preferable to use tantalum capacitors, but if you cannot find them, electrolytic capacitors can be used, but for more sensitive circuits, we recommend using tantalum. The DC-DC converter supports input from 5.5V to 32V, and at the output it maintains the preset voltage completely stabilized. Fig. 2 – Schematic 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC 🔗 Related Content If you liked this project, you might also be interested in these other articles: Symmetrical SMPS Switched Power Supply with IR2153 and IRF840 – 2x50V 350W + PCB Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 + PCB Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB How to Modify an ATX Power Supply to 13.6V, 22 Amperes Mini Switching Power Supply 5V – 24V, 3A using TNY268 with PCB 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 + PCB How ATX Power Supplies Work: Learn to Diagnose Problems in 10 Simple Steps 🖨️ Printed Circuit Board In Figure 3, we provide the PCB – Printed Circuit Board, in GERBER, PDF and PNG files. These files are available for free download, on the MEGA server, in a direct link, without any bypass. All to make it easier for you to do a more optimized assembly, either at home, or with a company that prints the board. You can download the files in the Download option below. The PCB tracks are doubled, the main ones have their tracks on the bottom and top of the PCB as the current is 5 amps. Fig. 3 – PCB 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC 📥 Files to download, Direct Link: Click on the link beside: GERBER, PDF and PNG files ✨ Our Gratitude and Next Steps We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content. Your Feedback is Invaluable: Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community. If you found this guide helpful, spread the knowledge! 🔗 Share This Guide Best regards, The ElCircuits Team ⚡

O post 5A Step-Down Converter 1.22V-26V Using RT8289 IC – With PCB apareceu primeiro em Electronic Circuits.

]]>
5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC with PCB

Fig. 1 – 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC with PCB

Powerful 5A Step-Down Converter: Build a Versatile 1.22V to 26V Solution at 500kHz with RT8289 IC and PCB

This is a DC-DC 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC, it works with a Step-Down conversion system.

This powerful chip manages to work with very few external components and provides a preset voltage between 1.22V to 26V, with 5 Amps of output current.

📖 General IC Description

The RT8289 is a step-down regulator with an internal Power MOSFET. It achieves 5A of continuous output current over a wide input supply range with excellent load and line regulation.

Current mode operation provides fast transient response and eases loop stabilization. The RT8289 provides protections such as cycle-by-cycle current limiting and thermal shutdown.

In shutdown mode, the regulator draws 25μA of supply current. The RT8289 requires a minimum number of external components, to provide a compact solution. The RT8289 is available in a SOP-8 (Exposed Pad) package.

🛠️ Features

  • High Output Current up to 5A
  • Internal Soft-Start
  • 100mΩ Internal Power MOSFET Switch
  • Internal Compensation Minimizes External Parts Count
  • High Efficiency up to 90%
  • 25μA Shutdown Current
  • Fixed 500kHz Frequency
  • Thermal Shutdown Protection
  • Cycle-by-Cycle Over Current Protection
  • Wide 5.5V to 32V Operating Input Range
  • Adjustable Output Voltage from 1.222V to 26V
  • Available in an SOP-8 (Exposed Pad) Package
  • RoHS Compliant and Halogen Free

⚡ Output Voltage Setting

To define the output voltage, we use a voltage divider formed by 2 resistors, R1 and R2, this allows the FB pin of the integrated circuit to detect changes in the output voltage, and recalibrate the circuit keeping it stabilized.

To set this output voltage, we can calculate the external resistive divider, according to the equation formulated below:

  • VOUT = VREF *(1 + (R1/R2))
    • Where VREF is the reference voltage (type 1.222V).
    • Where R1 = 10kΩ.

We exemplify in our circuit, the voltage divider is formed by R1 and R2.

✔️ General Formula:

  • VOUT = VREF *(1 + R1/R2)
  • Where VREF is the reference voltage (type 1.222V).
  • Where R1 = 10kΩ.

✔️ For a 3.3V output, our formula would look like:

  • Vout = 1,222 * (1+ (10/5.8))
  • Vout = 3.328V

✔️ For a 5V output, our formula would look like:

  • Vout = 1,222 * (1+ (10/3.16))
  • Vout = 5,089V

✔️ For a 9V output, our formula would look like:

  • Vout = 1,222 * (1+ (10/1.57))
  • Vout = 9,005V

✔️ For a 12V output, our formula would look like:

  • Vout = 1,222 * (1+ (10/1.13))
  • Vout = 12,036V

✔️ For a 26V output, our formula would look like:

  • Vout = 1,222 * (1+ (10/0.493))
  • Vout = 26,009V

We may be using a trimpot instead of R2, this allows you to vary the output voltage through the Trimpot.

🔌 The Circuit Schematic

In Figure 2, below, we can see the schematic diagram of the Low Noise and High Frequency 5A DC-DC Step-Down Converter.

All circuit components are SMD, except the terminal blocks, “optional”, you can solder directly to the board. This type of SMD circuit is great to be implemented in miniaturized circuits.

It is preferable to use tantalum capacitors, but if you cannot find them, electrolytic capacitors can be used, but for more sensitive circuits, we recommend using tantalum.

The DC-DC converter supports input from 5.5V to 32V, and at the output it maintains the preset voltage completely stabilized.

Schematic 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC

Fig. 2 – Schematic 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC

🔗 Related Content

If you liked this project, you might also be interested in these other articles:

🖨️ Printed Circuit Board

In Figure 3, we provide the PCB – Printed Circuit Board, in GERBER, PDF and PNG files. These files are available for free download, on the MEGA server, in a direct link, without any bypass.

All to make it easier for you to do a more optimized assembly, either at home, or with a company that prints the board. You can download the files in the Download option below.

The PCB tracks are doubled, the main ones have their tracks on the bottom and top of the PCB as the current is 5 amps.

PCB 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC

Fig. 3 – PCB 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC

📥 Files to download, Direct Link:

Click on the link beside: GERBER, PDF and PNG files

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

Your Feedback is Invaluable:

Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community.

If you found this guide helpful, spread the knowledge!

🔗 Share This Guide

Best regards,
The ElCircuits Team ⚡

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]]> https://www.elcircuits.com/step-down-converter-1v22-26v-5a-rt8289/feed/ 0 4A Low-Noise High-Frequency Boost Converter with MAX1709 + PCB https://www.elcircuits.com/max1709-4a-step-up-boost-converter-pcb/ https://www.elcircuits.com/max1709-4a-step-up-boost-converter-pcb/#respond Sat, 26 Feb 2022 23:15:00 +0000 https://elcircuits.com/4a-low-noise-high-frequency-step-up-dc-dc-converter-using-max1709-with-pcb/ 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 with PCB This is a DC-DC converter circuit that uses a MAX1709 series Integrated Circuit as the main component, it works with a Step-Up conversion system. This powerful microcircuit is able to work with very few external components and deliver a fixed 3.3V or 5V or adjustable 2.5V to 5.5V voltage, with 4 Amperes of output current. 📖 Integrated Circuit General Description The MAX1709 sets a new standard of space savings for high-power, step-up DC-DC conversion. It delivers up to 20W at a fixed (3.3V or 5V) or adjustable (2.5V to5.5V) output, using an on-chip power MOSFET from a +0.7V to +5V supply. Fixed-frequency PWM operation ensures that switching noise spectrum is constrained to 600kHz fundamental and its harmonics, allowing easy post filtering for noise reduction. External clock synchronization capability allows for even tighter noise spectrum control. Quiescent power consumption is less than 1mW to extend operating time in battery-powered systems. Two control inputs (ONA, ONB) allow simple push-on, push-off control through a single momentary push button switch, as well as conventional on/off logic control. The MAX1709 also features programmable soft-start and current limit for design flexibility and optimum performance with batteries. The maximum RMS switch current rating is 10A. For a device with a lower current rating, smaller size, and lower cost, refer to MAX1708 datasheet. 🔌The Circuit Schematic In Figure 2, below, we can see the schematic diagram of 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709. The circuit is simple to assemble, there are few external components, and there is no need for adjustment, once assembled, it is ready to work, if everything is correct, of course! The PCB tracks are bent, main ones have their tracks at the bottom and at the top of the PCB, because the current is 4 amperes. The capacitors are tantalum, however if you can’t find them, electrolytic capacitors can be used, however for more sensitive circuits, performance may not be as expected, but in most circuits they work very well. The DC-DC converter supports input from 0.7V up to 5V, and at the output it maintains a stabilized voltage of 5V, however to get the promised 4 Amps, it is necessary to have at least 3.3V at the input. Fig. 2 – Schematic Circuit 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 🔗 Related Content Symmetrical SMPS Switched Power Supply with IR2153 and IRF840 – 2x50V 350W + PCB Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 + PCB Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB How to Modify an ATX Power Supply to 13.6V, 22 Amperes Mini Switching Power Supply 5V – 24V, 3A using TNY268 with PCB 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC + PCB How ATX Power Supplies Work: Learn to Diagnose Problems in 10 Simple Steps 🧾 Bill of Materials Semiconductors U1 …… MAX1709 SMD Integrated Circuit D1 ….. B520C SMD Schottky Diode 5A Resistor R1 ….. 312KΩ SMD resistor (orange, brown, red, orange, gold) R2 ….. 2Ω SMD resistor (red, black, black, gold) Capacitor C1, C2, C6, C7 … 150uF SMD Tantalum Capacitor C3 ………………….. 10nF SMD Ceramic Capacitor C4 ………………….. 220nF SMD Ceramic Capacitor C5 ………………….. 100nF SMD Ceramic Capacitor Miscellaneous L1 ………. 1uH 5A SMD Inductor P1, P2 …. 2-pin PCB soldering terminal blocks (Optional) Others …. Printed Circuit Board, wires, etc. 🖨️ Printed Circuit Board (PCB) – Download In Figure 3, we provide PCB – Printed Circuit Board, in GERBER, PDF and PNG files. These files are available for free download, on MEGA server, in a direct link, without any bypass. All to make it easier for you to do a more optimized assembly, either at home, or with a company that prints the board. You can download the files in the Download option below. Fig. 3 – PCB – 4A Low-Noise High-Frequency Step-Up DC-DC Converter Using MAX1709 📥 Files to Download, Direct Link: Click on the link beside: GERBER, PDF and PNG files ✨ Our Gratitude and Next Steps We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content. Your Feedback is Invaluable: Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community. If you found this guide helpful, spread the knowledge! 🔗 Share This Guide Best regards, The ElCircuits Team ⚡

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4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 with PCB

4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 with PCB

This is a DC-DC converter circuit that uses a MAX1709 series Integrated Circuit as the main component, it works with a Step-Up conversion system.

This powerful microcircuit is able to work with very few external components and deliver a fixed 3.3V or 5V or adjustable 2.5V to 5.5V voltage, with 4 Amperes of output current.

📖 Integrated Circuit General Description

The MAX1709 sets a new standard of space savings for high-power, step-up DC-DC conversion. It delivers up to 20W at a fixed (3.3V or 5V) or adjustable (2.5V to5.5V) output, using an on-chip power MOSFET from a +0.7V to +5V supply.

Fixed-frequency PWM operation ensures that switching noise spectrum is constrained to 600kHz fundamental and its harmonics, allowing easy post filtering for noise reduction.

External clock synchronization capability allows for even tighter noise spectrum control. Quiescent power consumption is less than 1mW to extend operating time in battery-powered systems.

Two control inputs (ONA, ONB) allow simple push-on, push-off control through a single momentary push button switch, as well as conventional on/off logic control.

The MAX1709 also features programmable soft-start and current limit for design flexibility and optimum performance with batteries.

The maximum RMS switch current rating is 10A. For a device with a lower current rating, smaller size, and lower cost, refer to MAX1708 datasheet.

🔌The Circuit Schematic

In Figure 2, below, we can see the schematic diagram of 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709.

The circuit is simple to assemble, there are few external components, and there is no need for adjustment, once assembled, it is ready to work, if everything is correct, of course!

The PCB tracks are bent, main ones have their tracks at the bottom and at the top of the PCB, because the current is 4 amperes.

The capacitors are tantalum, however if you can’t find them, electrolytic capacitors can be used, however for more sensitive circuits, performance may not be as expected, but in most circuits they work very well.

The DC-DC converter supports input from 0.7V up to 5V, and at the output it maintains a stabilized voltage of 5V, however to get the promised 4 Amps, it is necessary to have at least 3.3V at the input.

Fig. 2 - Schematic Circuit 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709

Fig. 2 – Schematic Circuit 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709

🔗 Related Content

🧾 Bill of Materials

Semiconductors

  • U1 …… MAX1709 SMD Integrated Circuit
  • D1 ….. B520C SMD Schottky Diode 5A

Resistor

  • R1 ….. 312KΩ SMD resistor (orange, brown, red, orange, gold)
  • R2 ….. 2Ω SMD resistor (red, black, black, gold)

Capacitor

  • C1, C2, C6, C7 … 150uF SMD Tantalum Capacitor
  • C3 ………………….. 10nF SMD Ceramic Capacitor
  • C4 ………………….. 220nF SMD Ceramic Capacitor
  • C5 ………………….. 100nF SMD Ceramic Capacitor

Miscellaneous

  • L1 ………. 1uH 5A SMD Inductor
  • P1, P2 …. 2-pin PCB soldering terminal blocks (Optional)
  • Others …. Printed Circuit Board, wires, etc.

🖨️ Printed Circuit Board (PCB) – Download

In Figure 3, we provide PCB – Printed Circuit Board, in GERBER, PDF and PNG files. These files are available for free download, on MEGA server, in a direct link, without any bypass.

All to make it easier for you to do a more optimized assembly, either at home, or with a company that prints the board. You can download the files in the Download option below.

Fig. 3 - PCB - 4A Low-Noise High-Frequency Step-Up DC-DC Converter Using MAX1709

Fig. 3 – PCB – 4A Low-Noise High-Frequency Step-Up DC-DC Converter Using MAX1709

📥 Files to Download, Direct Link:

Click on the link beside: GERBER, PDF and PNG files

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

Your Feedback is Invaluable:

Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community.

If you found this guide helpful, spread the knowledge!

🔗 Share This Guide

Best regards,
The ElCircuits Team ⚡

O post 4A Low-Noise High-Frequency Boost Converter with MAX1709 + PCB apareceu primeiro em Electronic Circuits.

]]> https://www.elcircuits.com/max1709-4a-step-up-boost-converter-pcb/feed/ 0 Adjustable Switching Power Supply 5.1V-40V 2.5A using L4960 + PCB https://www.elcircuits.com/l4960-adjustable-switching-power-supply-40v-pcb/ https://www.elcircuits.com/l4960-adjustable-switching-power-supply-40v-pcb/#respond Mon, 06 Dec 2021 17:10:00 +0000 https://elcircuits.com/adjustable-switching-power-supply-5-1-to-40v-2-5-amp-using-l4960-pcb/ Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 In this article, we present an adjustable power supply with a stabilized output that varies from 5.1 to 40V, with a current of 2.5 amps. This one can also have its stabilized voltage fixed, everything will depend on the type of project you are going to use. The adjustable power supply is based on IC L4960 which is a monolithic power switching regulator IC, delivering 2.5A at a voltage variable from 5V to 40V in step down configuration. Features of device include current limiting, soft start, thermal protection and 0 to 100% duty cycle for continuous operation mode. Schematic Diagram The complete schematic diagram of power supply is shown below in Figure 2, it is a simple but complete power supply. Fig. 2 – Schematic Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 CIRCUIT OPERATION The L4960 is a monolithic step down switching regulator providing output voltages from 5.1V to 40V and delivering 2.5A. The regulation loop consists of a sawtooth oscillator, error amplifier, comparator and output stage. An error signal is produced by comparing the output voltage with a precise 5.1V on-chip reference (zener zap trimmed to ± 2%). This error signal is then compared with the sawtooth signal to generate a fixed frequency pulse width modulated pulses which drive the output stage. The gain and frequency stability of loop can be adjusted by an external RC network connected to pin 3. Closing loop directly gives an output voltage of 5.1V. Higher voltages are obtained by inserting a voltage divider. 🔗 Related Content If you liked this project, you might also be interested in these other articles: Symmetrical SMPS Switched Power Supply using IR2153 and IRF840 – 2x50V 350W + PCB Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB How to Modify an ATX Power Supply to 13.6V, 22 Amperes Mini Switching Power Supply 5V – 24V, 3A using TNY268 with PCB 5A, 1.22V to 26V, 500kHz Step-Down Converter Using RT8289 IC + PCB 4A Low-Noise High-Frequency Step-Up DC-DC Converter using MAX1709 + PCB How ATX Power Supplies Work: Learn to Diagnose Problems in 10 Simple Steps Output overcurrent at switch on are prevented by the soft start function. The error amplifier output is initially clamped by the external capacitor Css and allowed to rise, linearly, as this capacitor is charged by a constant current source. Output overload protection is provided in the form of a current limiter. The load current is sensed by an internal metal resistor connected to a comparator. When the load current exceeds a preset threshold this comparator sets a flip flop which disables the output stage and discharges the soft start capacitor. A second comparator resets the flip flop when the voltage across the soft start capacitor has fallen to 0.4V. The output stage is thus re-enabled and output voltage rises under control of the soft start network. If the overload condition is still present, the limiter will trigger again when the threshold current is reached. The average short circuit current is limited to a safe value by the dead time introduced by the soft start network. The thermal overload circuit disables circuit operation when the junction temperature reaches about 150°C and has hysteresis to prevent unstable conditions. Efficient operation at switching frequencies up to 150KHz allows a reduction in the size and cost of external filter components. The L4960 is mounted in a plastic Heptawatt power pack, and pinouts are shown in Figure 3 below. Fig. 3 – L4960 IC Heptawatt Pinout 🖨️ Printed Circuit Board (PCB) – Download We provide files with the PCB, schematic, PDF, GERBER and JPG, PNG and provide a direct link for free download and a direct link, “MEGA“. Fig. 4 – Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 📥 Files to Download, Direct Link: Click on the link beside: Layout PCB, PDF, GERBER, JPG ✨ Our Gratitude and Next Steps We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content. Your Feedback is Invaluable: Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community. If you found this guide helpful, spread the knowledge! 🔗 Share This Guide Best regards, The ElCircuits Team ⚡

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Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960

Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960

In this article, we present an adjustable power supply with a stabilized output that varies from 5.1 to 40V, with a current of 2.5 amps.

This one can also have its stabilized voltage fixed, everything will depend on the type of project you are going to use.

The adjustable power supply is based on IC L4960 which is a monolithic power switching regulator IC, delivering 2.5A at a voltage variable from 5V to 40V in step down configuration.

Features of device include current limiting, soft start, thermal protection and 0 to 100% duty cycle for continuous operation mode.

Schematic Diagram

The complete schematic diagram of power supply is shown below in Figure 2, it is a simple but complete power supply.

Fig. 2 - Schematic Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960

Fig. 2 - Schematic Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960

CIRCUIT OPERATION

The L4960 is a monolithic step down switching regulator providing output voltages from 5.1V to 40V and delivering 2.5A.

The regulation loop consists of a sawtooth oscillator, error amplifier, comparator and output stage. An error signal is produced by comparing the output voltage with a precise 5.1V on-chip reference (zener zap trimmed to ± 2%).

This error signal is then compared with the sawtooth signal to generate a fixed frequency pulse width modulated pulses which drive the output stage.

The gain and frequency stability of loop can be adjusted by an external RC network connected to pin 3.

Closing loop directly gives an output voltage of 5.1V. Higher voltages are obtained by inserting a voltage divider.

🔗 Related Content

Output overcurrent at switch on are prevented by the soft start function. The error amplifier output is initially clamped by the external capacitor Css and allowed to rise, linearly, as this capacitor is charged by a constant current source. Output overload protection is provided in the form of a current limiter.

The load current is sensed by an internal metal resistor connected to a comparator. When the load current exceeds a preset threshold this comparator sets a flip flop which disables the output stage and discharges the soft start capacitor.

A second comparator resets the flip flop when the voltage across the soft start capacitor has fallen to 0.4V.

The output stage is thus re-enabled and output voltage rises under control of the soft start network.

If the overload condition is still present, the limiter will trigger again when the threshold current is reached. The average short circuit current is limited to a safe value by the dead time introduced by the soft start network.

The thermal overload circuit disables circuit operation when the junction temperature reaches about 150°C and has hysteresis to prevent unstable conditions.

Efficient operation at switching frequencies up to 150KHz allows a reduction in the size and cost of external filter components.

The L4960 is mounted in a plastic Heptawatt power pack, and pinouts are shown in Figure 3 below.

Fig. 3 - L4960 IC Heptawatt Pinout

Fig. 3 - L4960 IC Heptawatt Pinout

🖨️ Printed Circuit Board (PCB) - Download

We provide files with the PCB, schematic, PDF, GERBER and JPG, PNG and provide a direct link for free download and a direct link, "MEGA".

Fig. 4 - Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960

Fig. 4 - Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960

📥 Files to Download, Direct Link:

Click on the link beside: Layout PCB, PDF, GERBER, JPG

✨ Our Gratitude and Next Steps

We sincerely hope this guide has been useful and enriching for your projects! Thank you for dedicating your time to this content.

Your Feedback is Invaluable:

Have any questions, suggestions, or corrections? Feel free to share them in the comments below! Your contribution helps us refine this content for the entire ElCircuits community.

If you found this guide helpful, spread the knowledge!

🔗 Share This Guide

Best regards, The ElCircuits Team ⚡

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