Power supply for the modular high end audio amplifier system

Project presentation

Abstract

The power supply presented here is part of my modular audio amplifier system. It is a scaled down version of the large power supply for the modular high end audio system. The power supply here provides enough energy for a reasonable sized high end audio amplifier for domestic use.

Design presentation

Design considerations

The design is exactly the same like the large power supply for the modular high end audio system, but with half the number of storage capacitors.

Schematic

Assembly

Cost

Here is the cost breakdown of the module:

Part Quantity Cost p.p. [€] Cost total [€]
Storage capacitors 4 13.00 52.00
Rectifier diodes 8 2.00 16.00
Heat sinks 8 2.50 20.00
Cage clamp terminals 36 0.25 9.00
Small capacitors 14 0.50 7.00
Resistors 14 0.15 2.00
PCB 1 8.00 8.00
114€ incl. VAT

The calculation shows that the module cost is only roughly 30% lower than the large power supply.

Summary

This is a reasonable sized power supply targeted towards medium power applications in the range of up to 500W. For higher power applications, the large power supply for the modular high end audio system would be more suitable.