Power supply
About the Power supply PCB
Power supply is an open source PCB design by prydin, published on GitHub. It is a 2-layer board measuring 106.9 × 48 mm, with 16 components from 9 distinct parts.
By type, the board carries 6 connectors, 6 capacitors and 4 diodes.
It belongs with the audio and power & battery designs in this gallery.
From the project
MOSFET-based 50W Class AB amplifier
The amplifier has been tested with rail voltages ranging from +-24V to +-37V with good results. Obviously, higher output power requires more voltage. The recommended supply voltage range is +-24V to +-40V.
In my build, I'm using a 2x25V toroidial transformer. Where I live, this ended up giving me 2x39V rectified voltage, which is a bit overkill for 50W, but some extra headroom is never a bad thing.
Power supply bill of materials (BOM)
16 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AC1 | Spade Connector | J1 |
| 1 | GND | Spade Connector | J2 |
| 1 | CT | Spade Connector | J3 |
| 1 | AC2 | Spade Connector | J4 |
| 1 | V- | Spade Connector | J5 |
| 1 | V+ | Spade Connector | J6 |
| 4 | GI754 | D_P600_R-6_P12.70mm_Horizontal | D1, D2, D3, D4 |
| 4 | 4700u | CP_Radial_D18.0mm_P7.50mm | C1, C2, C5, C6 |
| 2 | 100n | C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C3, C4 |
Power supply design files
The KiCad project lives in the prydin/classab-amp-mosfet repository on GitHub; these links point at the commit this page was built from.
Power supply: common questions
How big is the Power supply PCB?
The Power supply measures 106.9 × 48 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Power supply?
16 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Power supply design files?
From the prydin/classab-amp-mosfet repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Power supply design in my own project?
The repository has no license, so all rights stay with prydin. Use it as a reference, and ask the author before reusing the design.
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