All-discrete topology
Single-pass, series regulator design.
No IC (integrated circuits) are used.
Low noise, high PSRR.
A long-tailed pair differential amplifier with current mirror and constant current source forms the first stage of the error amplifier.
The second stage is the voltage amplification stage (VAS), also with constant current source load.
Onboard heatsinks can be used which would allow to supply up to 0.3A continuous
More sustained currents are possible by using larger, offboard heatsinks.
Typical output voltages are ±5V, ±9V, ±10V, ±12V, ±15V, ±18V, ±24V, ±27V, ±30V , ±36V. ±48V,±60V.

Typical Application
Input voltage VAC= (Output voltage +8)/1.414
For example:
±12VDC-OUT,
Input voltage VAC=（12+8)/1.414=14.14VAC, Please choose Dual  15VAC
±5VDC-OUT    Dual 9VAC-IN
±9VD-COUT    Dual 12VAC-IN
±12VDC-OUT   Dual 15VAC-IN
±15VDC-OUT   Dual 18VAC-IN
±18VDC-OUT   Dual 18VAC-IN
±24VDC-OUT   Dual 22-24VAC-IN
±30VDC-OUT   Dual 26-28VAC-IN
±36VDC-OUT   Dual 32VAC-IN
±48VDC-OUT   Dual 40VAC-IN
±60VDC-OUT   Dual 48VAC-IN


Quiescent current setting

Quiescent current= Load current*1.4
R1=0.65/ Quiescent current

For example:
Load current=0.09A;
Quiescent current=0.09*1.4=0.126
R1=0.65/0.126=5.1R
There are two R1 position on the PCB, you can choose to install two 10R or one 5R resisto.

Do not short the output terminal to discharge capacitor, otherwise it will damage the power board.