PSU-12 2-Rail Adjustable PSU
The PSU-12 was designed as a reduced version of the PSU-8, where only two rails and a reduced size were required. It features two adjustable rails using the LM317 and LM337 devices.
The LM317/337 devices will require heatsinking of some form for most applications. The size and type of heatsink will depend on the application and the mechanical design of the equipment. In many applications I use a 3mm bracket to the sub-assembly baseplate, which is adequate. Thermal past is required to get good thermal conduction between joining surfaces, and the regulator tabs need to be electrically insulated from the heatsink.
The LM317/337 devices will require heatsinking of some form for most applications. The size and type of heatsink will depend on the application and the mechanical design of the equipment. In many applications I use a 3mm bracket to the sub-assembly baseplate, which is adequate. Thermal past is required to get good thermal conduction between joining surfaces, and the regulator tabs need to be electrically insulated from the heatsink.
V+ Rail (LM317)
V- Rail (LM337)
R4
Vout
R3
Vout
2K
11.9 to 17.2V
2K
-11.9 to -17.2V
