 |
| Symmetrical Power Supply for Power Amplifiers |
For power amplifier lovers, who build their own audio power amplifiers, here is a good full wave rectifier linear symmetric power supply that will meet the power demand without leaving anything to be desired in terms of stability.
This power supply is designed for amplifiers with power up to 2500W, it will work without any problems with great stability.
Most power amplifier circuits require a symmetrical power supply, and what differs from each other is always the power required from the supply.
As we know, a good power supply with good filtering will determine the quality and final power of your amplifier.
You may be interested in:
- Switched Power Supply SMPS 13.8V 10A using IR2153 IC and IRF840, with PCB
- Adjustable Power Supply 1.2V to 37V, 6A, Short Circuit Protection with LM317 and TIP36 + PCB
- Adjustable Switching Power Supply 5.1 to 40V, 2.5 Amp using L4960 + PCB
- Symmetrical Adjustable Power Supply 1.25V to 47V 10 Amps with Short Circuit Protection + PCB
- Adjustable Power Supply 1.2 to 37V High Current 20A with LM317 and TIP35C + PCB
- 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
The Schematic Diagram
The complete schematic diagram of the power supply is shown below in Figure 2, it is a simple but complete power supply.
 |
| Fig.2 - Electrical schematic Symmetrical Power Supply for Power Amplifiers |
However, it is worth remembering that for each amplifier power range, we can assemble a type of power supply according to the power of your amplifier.
Circuits Configuration
We are presenting 3 different configurations to exemplify the different types of power amplifiers.
There are 3 examples of simplified formulas for you to calculate the power supply Current and Voltage according to the power of your amplifier.
Remembering that the PCB printed circuit board is the same for all configurations.
1° Configuration:
In this configuration, we can use amplifiers that have a total power up to 400W
We need to calculate the maximum power supply current, considering 45V supply, and the maximum power of 400W. Calculating ohms Law: P = V * I
- I = P / V
- I = 400/45
- I = 8.88A
Now you need to stipulate the maximum ripple allowed in your design, in this case: If you set the maximum ripple voltage to 5%!
- V_ripple = V_ps * 5%
- V_ripple = 45V * 5%
- V_ripple = 2.25V
Once the maximum ripple voltage has been stipulated, we need to calculate the capacitor for that ripple at 5% of the source, "You may be calculating the percentage that best suits your design."
Capacitor Calculation Formula : C = I / F * V_ripple
- C = 8.88 / 120 * 2.25
- C = 8.88 / 270
- C = 0.032888 = > C = 32.888X10^-6 = 32.888uF
As our board was designed to support 6 capacitors. We can divide the entire value into uF and divide by 6 Capacitors.
- C_individual = 32.888 / 6
- C_individual = 5.481uF
For a closer commercial capacitors value, we have:
C_individual = 6.800uF / 63V
- 6 x 6.800uF Capacitor
- 15A rectifier bridge
2° Configuration:
In this configuration, we can use amplifiers that have a total power up to 1200W
We need to calculate the maximum power supply current, considering 75V supply, and the maximum power of 1200W. Calculating ohms Law: P = V * I
- I = P / V
- I = 1200/75
- I = 16A
Now you need to stipulate the maximum ripple allowed in your design, in this case: If you set the maximum ripple voltage to 5%!
- V_ripple = V_ps * 5%
- V_ripple = 75V * 5%
- V_ripple = 3.75V
Once the maximum ripple voltage has been stipulated, we need to calculate the capacitor for that ripple at 5% of the source, "You may be calculating the percentage that best suits your design."
Capacitor Calculation Formula : V_ripple = I / F * C
- C = I / F * V_ripple
- C = 16 / 120 * 3.75
- C = 16 / 450
- C = 0.035555 = > C = 35.555X10^-6 = 35.555uF
As our board was designed to support 6 capacitors. We can divide the entire value into uF and divide by 6 Capacitors.
- C_individual = 35.555 / 6
- C_individual = 5.925uF
For a closer commercial capacitors value, we have:
- 6 x 6.800uF Capacitor
- 25A rectifier bridge
3° Configuration:
In this configuration, we can use amplifiers that have a total power up to 2500W
We need to calculate the maximum power supply current, considering 95V supply, and the maximum power of 2500W. Calculating ohms Law: P = V * I
- I = P / V
- I = 2500/95
- I = 26A
Now you need to stipulate the maximum ripple allowed in your design, in this case: If you set the maximum ripple voltage to 5%!
- V_ripple = V_ps * 5%
- V_ripple = 95V * 5%
- V_ripple = 4.75V
Once the maximum ripple voltage has been stipulated, we need to calculate the capacitor for that ripple at 5% of the source, "You may be calculating the percentage that best suits your design."
Capacitor Calculation Formula : C = I / F * V_ripple
- C = 26 / 120 * 4.75
- C = 26 / 570
- C = 0.045614 = > C = 45.614X10^-6 = 45.614uF
As our board was designed to support 6 capacitors. We can divide the entire value into uF and divide by 6 Capacitors.
- C_individual = 45.614 / 6
- C_individual = 7.602uF
For a closer commercial capacitors value, we have:
C_individual = 10.000uF / 200V
- 6 x 10.000uF Capacitor
- 40A rectifier bridge
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".
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!!!
No comments:
Post a Comment