Presumably this chip controls a switching power supply. There is a transistor on the bottom of the board. The transformer has two isolated windings on the output.

It is probably automotive.

MLAB
SSKB
​

Any ideas?

 

Presumably this chip controls a switching power supply. There is a transistor on the bottom of the board. The transformer has two isolated windings on the output.

It is probably automotive.

MLAB
SSKB
​

Any ideas?View attachment 141046

Fair bet its a house coded part, but that could just be *their* number stamped on a regular off the shelf chip.

If you can't get a service manual, you may have to hand trace. If you hit a matching commercial chip pin layout, you can investigate the electrical characteristics and see how similar the device is.

PWM chips can have some odd wrinkles like UVLO and duty cycle, but once you identify the family, its explained on the data sheet.

 

Presumably this chip controls a switching power supply. There is a transistor on the bottom of the board. The transformer has two isolated windings on the output.

It is probably automotive.

MLAB
SSKB
​

Any ideas?View attachment 141046

Hello King Ottokrarll, So you do your benchmark from All about circuit. This IC is used in Rinehart Motion System LLC Driver PCB. BTW the IC is not for new design. So you can find another one.