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STD SRPP+ Headphone Amp

Project Status: Ongoing

License: Public Domain

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Creation time: 2022-06-08 03:46:05
Update time: 2023-11-01 21:07:38
Description

Mosfet Shunt Regulated Push Pull Design from TubeCad converted to be used as a Headphone Amp.

 

OG https://www.tubecad.com/2005/February/blog0037.htm

 

R9 and R21 Set the Gain. 3.3X gain in the example, increase resistance to 100K for 10X. Tha pair of resistors R2, R3 and R14,15 set the Current. This run in Class A so it will be always drawing max current. Increase the pair value for more current but you will need bigger heatsinks.

 

Design Drawing
schematic diagram
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ID Name Designator Footprint Quantity
1 .1u C1,C6,C7,C10,C11,C12,C13,C16,C17,C18 ALEX POLY CAP 10
2 470uF C2,C3,C4,C5 ALEX ELEC CAP 4
3 2.2u C8,C14 ALEX POLY CAP 2
4 2.2n C9,C15 ALEX POLY CAP 2
5 1N4007 D1,D2,D3,D4 DO-35_BD2.0-L4.2-P8.20-D0.5-RD 4
6 LED LED HDR-F-2.54_1X2 1
7 IRF510 M1,M2,M3,M4 TO-220-3_2SD526-Y 4
8 Out P1 ALEX 3 PIN 1
9 In P2 ALEX 3 PIN 1
10 PW PW ALEX 2 PIN 1
11 10k R1 AXIAL-0.3 1
12 22k R2,R3,R14,R15 AXIAL-0.3 4
13 100 R4,R12,R13,R16,R24,R25 AXIAL-0.3 6
14 4.7k R5,R6,R17,R18 AXIAL-0.3 4
15 1k R7,R19 AXIAL-0.3 2
16 10K R8,R20 AXIAL-0.3 2
17 33k R9,R21 AXIAL-0.3 2
18 1 R10,R11,R22,R23 AXIAL-0.3 4
19 SW1 SW1 ALEX 2 PIN 1
20 SW2 SW2 ALEX 2 PIN 1
21 L7812 U1 TO-220-3_L10.0-W4.5-P2.54-L 1
22 L7912 U2 TO-220-3_L10.0-W4.5-P2.54-L 1
23 OPA2134 U3,U4 DIP08 2

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