Fig. 1 - High Fidelity 14W - 12V Power Amplifier using TDA2030 IC

The TDA2030 is a monolithic integrated circuit in a Pentawatt® package, intended to be used as a low frequency Class AB amplifier. 

Typically, it provides output power of 14W (d = 0.5%) at 14V / 4Ω; at ± 14V the guaranteed output power is 12W with a load of 4Ω and 8W on an 8Ω.

In Figure 2, we can see the pinout of the TDA2030, it provides a high current output and very low harmonic and cross distortion. 

Fig. 2 - Pinout TDA2030

In addition, the device incorporates a short-circuit protection system and an arrangement to automatically limit the dissipated energy so as to keep the working point of the output transistors within their safe operating area. A conventional thermal shutdown system is also included.

Features

• Wide-range supply voltage, up to 36 V
• Single power supply
• Short-circuit protection to ground
• Thermal shutdown
• Low distortion
  
  

PROTECTION AGAINST SHORT CIRCUIT

The TDA2030 has a unique circuit that limits current from the output transistors. the maximum output current is a function of the emitter-collector voltage; hence the output transistors work within their safe operating area. 

This function can therefore be considered to be peak power limiting rather than simple current limiting. Reduces the possibility of the device being damaged during an accidental output short circuit.

THERMAL DISCONNECTION

The presence of a thermal limiting circuit offers the following advantages:

1. An output overload (even if it is permanent), or an ambient temperature above the limit can be easily withstood as the Tj cannot exceed 150°C.
   
   
2. The heat sink may have a lower safety factor compared to a conventional circuit. There is no possibility of damage to the device due to high junction temperature. If for some reason the junction temperature rises up to 150°C, thermal shutdown simply reduces power dissipation at current consumption.

The maximum allowable power dissipation depends on the size of the external heat sink (ie thermal resistance); this power is dissipated depending on the ambient temperature for different thermal resistance.

The schematic circuit is shown in Figure 3, it is a very simple circuit, which can be easily assembled even by people who are not experienced in circuit assembly.

Fig. 3 - Schematic High Fidelity 14W - 12V Power Amplifier using TDA2030 IC

Component List

• Semiconductors
• U1 .................. TDA2030 Integrated Circuit
• D1, D2 ........... 1N4007 Silicon Diode
  
  
• Resistors:    
• R1, R2, R3 ..... 100KΩ resistor (brown, black, yellow, gold)
• R4 .................. 4K7Ω resistor (yellow, red, purple, gold)
• R5 .................. 150KΩ resistor (brown, green, yellow, gold)
• R6 .................. 1Ω / 1W resistor (brown, black, gold, gold) 
• RP1 ............... 22KΩ Potentiometer
  
  
• Capacitors
• C1 ................. 2.2µF / 35V Electrolytic Capacitor
• C2 ................. 22µF / 35V Electrolytic Capacitor
• C3 ................. 1000µF / 35V Electrolytic Capacitor
• C4 ................. 2µF / 35V Electrolytic Capacitor
• C5 ................. 100nF Polyester or Ceramic Capacitor
• C6.................. 220nF polyester or ceramic
• C7 ................. 2200µF / 35V Electrolytic Capacitor
  
  
• Others
• P1, P2, P3 ... Screw Terminal Type 5mm 2-Pin Connector
• Printed circuit board, heat sink, box, wires, etc.
  
  

In Figure 4, we are offering the PCB - Printed Circuit Board, in GERBER, PDF and PNG files, for you who want to do the most optimized assembly, either at home, or if you prefer in a company that develops the board, you can is downloading and make the files in the Download option below.

Fig. 4 - PCB - High Fidelity 14W - 12V Power Amplifier using TDA2030 IC

Files to Download, Direct Link:

Fig. 1 - 400W Class AB Amplifier using MJL4281A and MJL4302A transistors + PCB

This amplifier circuit can be used for virtually any type of application that requires an amplifier of high performance, low noise and low distortion, and excellent sound quality.

It uses 4 power transistors on the output; two NPN transistors MJL4281 and two PNP MJL4302, forming a double pair of complementary transistors.

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The Power Transistors

The MJL4281A and MJL4302A transistors are power transistors designed for high power audio, they have a collector-emitter sustaining voltage of 350 V, high gain - 80 to 240, with the hFE = 50 (min) 8A collector current. And a low harmonic distortion, which makes a transistor exceptional for high power operation and audio quality.

The Circuit

The complexity of the circuit is at an advanced level, it is not recommended for those who do not have experience in electronics and in assembling amplifier circuits, you must have minimal knowledge at an advanced level to assemble this type of power amplifier.

The schematic diagram of the complete circuit, shown in Figure 2 below, is a very robust amplifier, with great sound quality, and very stable, responding very well at all audible frequencies, with little attenuation in the auditory frequency range 20Hz to 20Khz.

Fig. 2 - Schematic 400W Class AB Amplifier using MJL4281A and MJL4302A transistors

Power supply

The power supply is symmetrical, with a voltage of +65V | 0V | -65V, and direct current, with at least 6 Amps of current. For continuous use, we recommend 8A, especially if used in a subwoofer.

In Figure 3 below, we have a suggestion for a power supply that we use in our projects. In this article, besides having the schematic diagram with the Printed Circuit Board, you will understand how to easily calculate your own Power Supply, with the desired voltage.

You can in the link below:

• Symmetrical Power Supply for Power Amplifiers using Calculation + PCB

Fig. 3 - Symmetrical Power Supply for Power Amplifiers

Components List

We are offering the PCB - Printed Circuit Board, in GERBER, PDF and PNG files, for you who want to do the most optimized assembly, either at home. 

If you prefer in a company that develops the board, you can is downloading and make the files in the Download option below.

Fig. 4 - PCB - 400W Class AB Amplifier using MJL4281A and MJL4302A transistors

Files to download, Direct Link:

Fig.- 24W Stereo Hi-Fi Audio Amplifier using TDA2616 + PCB

In this article, we show you how to build a simple and portable 12W + 12W audio amplifier using the TDA2616 Integrated Circuit.

The TDA2616 IC is a stereo power audio amplifier, it comes with plastic package (SOT131) single-in-line 9-lead (SIL9).

This IC is explicitly designed for mains powered amplifier circuits, such as stereo radio, instrument return box, TV sets and so on.

The TDA2616 IC has a good input gain balance on both channels in accordance with IEC 268 and DIN 45500 standards.

In addition, the TDA2616 has a special integrated circuit for the suppression of noise signals at the inputs during activation and deactivation, which avoids clicking sounds or the famous popping during circuit operation.

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Features

• Requires very few external components
• No switch-on/switch-off clicks
• Input mute during switch-on and switch-off
• Low offset voltage between output and ground
• Excellent gain balance of both amplifiers
• Hi-fi in accordance with IEC 268 and DIN 45500
• Short-circuit proof and thermal protected
• Mute possibility.
  
  

In Figure 2 below, we show the complete 24W Stereo Audio Amplifier Circuit using TDA2616 IC, as we can see, there are few external components, which makes it easier for those who do not have much experience with assembling electronic circuits.

Fig. 2 - Schematic 24W Stereo Hi-Fi Audio Amplifier with Mute using TDA2616

Amplifier Operation 

This amplifier circuit was designed to work with a symmetrical power supply, the maximum power supply voltage is 21V, however the recommended is 16V, with this voltage, an output power of 2 × 12 W is obtained (with THD = 0 .5%) with a load of 8Ω.

The mute circuit can also be activated via pin 2. When a current of 300µA is present at pin 2, the circuit is in the mute condition.

The internal gain voltage is fixed at 30dB, which allows us a stable balance between the two amplifier channels (0.2dB).

Components List

Fig. 3 - PCB - 3D - 24W Stereo Hi-Fi Audio Amplifier with Mute using TDA2616

Click on the direct link to download the files: Layout PCB, PDF, GERBER, JPG

If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

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My Best Regards!!!

This circuit built based on TEA2025 IC which is a monolithic integrated audio amplifier in a 16-pin plastic dual in line package manufactured by UTC. 

The circuit has Internal Thermal Protector. It is designed for portable cassette players, mp3 players and radios. 

You can also use it as your smartphone or PC audio amplifier. This circuit requires 9V power supply to work, you may use a power supply circuit with output 9V 500mA DC current or a 9V lead acid battery.

Features

• The power supply voltage range is from 3V to 15V.
• Working Voltage down to 3V
• Few External components
• Dual or Bridge Connection Modes
• High Channel isolation
  
• Very low switch On/Off Noise
• Voltage gain up to 45dB(Adjustable with external resistor)
• Soft clipping
• Internal Thermal protection
  
  

Working Explanation

Applications

• Electronic Instruments
• PC sound speaker
• Home theater systems
• Hi-fi electronic gadgets and devices
• Robotics applications 
• Children’s gadgets and toys, etc.
  
  

Fig. 1 - Schematic 5W Stereo Audio Amplifier Circuit using TEA2025 IC

Components List

• U1 ................................ TEA2025 Integrated circuit
  
  
• R1, R2 ......................... 10K resistor (brown, black, orange, gold)
  
  
• C1, C2 ......................... 0.47uF ceramic, polyester capacitor 
• C3, C4, C5, C6, C9 ..... 100uF electrolytic capacitor
• C7, C11 ....................... 470uF electrolytic capacitor
• C8, C10 ....................... 0.15uF ceramic, polyester capacitor 
  
  
• P1, P2, P3, P4, P5 ....... Screw Terminal Type 5mm 2-Pin Connector

• Others ......................... PCB, tin, wires, etc.
  
  

PCB - Download

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

Fig. 2 - 5W Stereo Audio Amplifier Circuit using TEA2025

Click on the direct link to download the files: Layout PCB, PDF, GERBER, JPG

If you have any questions, suggestions or corrections, please leave them in the comments, and we will answer them soon.

Subscribe to our blog!!! Click here - elcircuits.com!!!

My Best Regards!!!

Fig 1. - PCB 4 x 50W High Power Amplifier, 14.4V - IC TDA7563A

Para versão em Português, Clique Aqui!!!

Also, the circuit is very easy to build as it requires very few external components.

The TDA7563A is a quad-bridge type amplifier of BCD technology in Flexiwatt27 and Power SO36 packages designed specifically for car radio applications.

Thanks to the DMOS output stage, the TDA7563A has very low distortion, which allows for clear and powerful sound. 

Features include its superior efficiency performance resulting from the unique internal system structure, making it the device best suited to simplify thermal management in high power packages.

This device is equipped with a complete diagnostic matrix that communicates the status of each speaker via the I2C bus.

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Features

• Multiple Power BCD Technology
• MOSFET output power stage
• DMOS power output
• New high efficiency technology (SB class)
• High output power capacity 4x28W / 4Ω @ 14.4V, 1kHz, 10% THD, maximum power 4x50W
• Maximum output power 4x72W / 2Ω
• Complete conduction of I2C bus:
• Standby
• Front/rear independent, smoothed play/mute
• Selectable 26dB / 12dB gain (for low noise line output function)
• Enable / disable high efficiency
• I2C bus digital diagnostics (including DC AC load detection)
• Total failure protection
• DC offset detection
• Four independent short circuit protection
• Cutting Detector Pin with Selectable Threshold (2% / 10%)
• Standby/mute pin
• Linear thermal shutdown with multiple thermal warnings
• ESD protection

In Figure 2 below, you can see the schematic of the High Efficiency Power Amplifier. We can understand and analyze the simplicity of the circuit and see that it is an easy to assemble circuit with few external components.

Fig 2 - Schematic Diagram 4 x 50W High Power Amplifier, 14.4V - IC TDA7563A

Power Supply

This amplifier is powered by a single positive and negative voltage power supply and has a supply voltage range that varies with a minimum voltage of 8V and a maximum voltage of 18V. 

The typical working voltage with no load on the integrated circuit is 14.4V.

The power supply must have a current of at least 5 amps to be used in mono mode, when mounted in stereo version, "two channels", the current must be doubled, and it must also be provided with a good filtering to avoid a ripples system that can cause noise in the amplifier.

The working impedance value of this amplifier to reach its total power is 4 ohms, but we can also set it to 8 ohms, but then we will not get the maximum power from the amplifier.

Components List

• CI1 ......................... Integrated Circuit TDA7563A
• C1, C2, C3, C4 ...... 220nF Ceramic / Polyester Capacitors
• C5 ........................... Capacitors 1uF / 63v
• C6 ........................... Electrolytic Capacitor 10uF / 63v
• R1 ........................... 47K Ohm resistors
• R2 ........................... 8K2 ohm resistor
• R3 ........................... Resistor 4K7 ohms
• P1 to P9 .................. KF301 solderable 2-Pin Bolt-On Connector (Optional)
• J1............................. 3 Ways 1x3 Weldable Male Pin Bar
• Others ..................... Heatsink for IC, wires, connectors, PCI, tin etc.

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

Direct Download Link

Click on the link to download the files: Layout PCB, PDF, GERBER, JPG

If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

Subscribe to our blog!!! Click here - Elcircuits.com!!!

My Best Regards!!!

Fig. 3 - PCB - 1W Amplifier for Stereo Headphone with IC TDA2822M

Simple headphone amplifier with few external components that is easy and inexpensive to assemble. This IC is designed for amplifying portable devices such as CD players, portable radios, small speakers, etc.

First of all, we will use it to amplify the audio signal for headphones, that is, we will build a headphone amplifier, whether to listen to music from a mobile phone, connect instruments to study, such as electric guitar, bass guitar, ukulele, guitar, or any other audio signal that needs to be amplified. 

You might also be interested in:

• 24W Stereo Hi-Fi Audio Amplifier using TDA2616 + PCB
• 4 x 50W High Power Amplifier, 14.4V - IC TDA7563A + PCB
• 320W Power Audio Amplifier, Powered with 14.4V - 2Ω with IC TDA7560 + PCB
• 100W RMS Audio Amplifier IC TDA7294 + PCB
• 200W RMS Stereo Power Amplifier with IC STK4231II + PCB
  
  

The main component is the TDA2822, a monolithic integrated circuit in an 8-pin lead  Mini-dip package. It is intended for use as a dual audio power amplifier in portable audios.

FEATURES

• Dual Low-voltage power amplifier 
• Supply voltage down to 1.8V 
• Low crossover distortion                                
• Low quiescent current z Bridge or stereo configuration

Fig. 2 - 1W Amplifier for Stereo Headphone with IC TDA2822M

Fig. 1 - PCB  68W Hi-Fi Audio Power Amplifier - IC LM3886T

The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. 

The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). 

SPiKe protection means that these parts are completely safeguarded at the output against over-voltage, under-voltage, over-loads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The IC pinout is shown in Figure 2 below.

Fig. 2 - Pinout IC LM3886T

The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0μV. It exhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides exceptional linearity with an IMD (SMPTE) typical rating of 0.004%.

You might also be interested in:

• 170W AB Class Bridge Mode Amplifier using TDA7294 IC + PCB
• High Fidelity 14W - 12V Power Amplifier using TDA2030 IC + PCB
• 24W Stereo Hi-Fi Audio Amplifier using TDA2616 + PCB
• HI-FI 120W RMS Amplifier Circuit using LM4780 IC + PCB
• 4 x 50W High Power Amplifier, 14.4V - IC TDA7563A + PCB
• 180W RMS 4-Channel Amplifier with TDA7386 + PCB
• 320W Power Audio Amplifier, Powered with 14.4V - 2Ω with IC TDA7560 + PCB
• 100W RMS Audio Amplifier IC TDA7294 + PCB
• 200W RMS Stereo Power Amplifier with IC STK4231II + PCB
  
  

Features

• 68W cont. avg. output power into 4Ω at VCC = ±28V
• 50W cont. avg. output power into 8Ω at VCC = ±35V
• 38W cont. avg. output power into 8Ω at VCC = ±28V
• 135W Instantaneous Peak Output Power Capability
• Signal-to-Noise Ratio ≥ 92dB
• An Input Mute Function
• Output Protection from a Short to Ground or to the Supplies via Internal Current Limiting Circuitry
• Output Over-Voltage Protection against Transients from Inductive Loads
• Supply Under-Voltage Protection, not Allowing Internal Biasing to Occur when |VEE| + |VCC| ≤ 12V, thus Eliminating Turn-On and Turn-Off Transients
• 11-Lead TO-220 Package

The Power Supply

Fig. 3 - Schematic  68W Hi-Fi Audio Power Amplifier - IC LM3886T