Simple vehicle power converter - power supply circuit - Circuit diagram

MOS power IC full range

Photocoupler

In the figure, R2~R6 are output voltage setting resistors. If other grade voltages are required, they can be calculated as follows:

V _OUT =(1+R2/R1)V _REF +I _ADJ ≌(1+R2/R1)V _REF

Where V _REF is the reference voltage, typically 1.25V, I _ADJ is the current flowing out of the ADJ pin, typically 50μA, and R2 represents one of R2~R6 in the figure.

In the figure, C1 and C2 are anti-vibration capacitors, C3 can improve the ripple removal rate and circuit stability, D1 is the output short-circuit protection diode, and D2 prevents the output terminal from being damaged above the input terminal potential.