Precision ±15V regulator for pre-amp or headphone amplifier

This is a precision ±15V regulator on a single side PCB. The circuit is based on EB-802 with design by zerosoft on www.headphoneamp.co.kr . I have replaced some components that easy to find in the market and design a new PCB that look like symmetry layout. But, you can replace the components with high quality component if you can find.

Precision ±15V regulator for pre-amp or headphone amplifier

Prototype the top layer of PCB I use as ground plane only and unnecessary becuase all importance PCB route is the bottom only.

Adjust VR1 and VR2 to achieve the desired voltage output (±15V at CON2).

Schematic

Precision ±15V regulator for pre-amp or headphone amplifier
Click to enlarge image

PCB

Precision ±15V regulator for pre-amp or headphone amplifier
Click to enlarge image

Components

D1-D4
1N5822
C1-C4, C13, C14, C19, C20
0.1uF/63V flim capacitor
C11, C12
220uF/16V
C15, C16
47uF/35V
C5-C10
2200uF/25V or 35V Electrolytic capacitor
(C7 and C10 may be 1000uF/25V)
L1 and L2
100uH
Q1
IRF640 N-channel MOSFET
Q2
IRF9640 P-channel MOSFET
IC1 and IC2
NE5534 OP-Amp
D9 and D10
LM326-5.0 Voltage reference or LM329DZ/6.9V
Ttransformer
15-0-15 V, 2A
All resistors are Vishey/Dale RN-55

 Precision ±15V regulator for pre-amp or headphone amplifier

Precision ±15V regulator for pre-amp or headphone amplifier

coolcircuit.com

You may have to register before you can post comments and get full access to forum.
EMS supplier