SMPS circuit diagram - using switching regulator IC - STR W6251 - Used with Hitachi HDR081
The Sanken concept is used for
power supply. Sanken SRTW6252 is designed. The receiver works between 85 and
265 VAC mains voltage by using STRW6252. In SMPS applications, secondary
voltage regulation is adjusted according to the feedback voltage from the secondary
side of transformer. The feedback voltages are 3.3V and 5V. This is connected
to the comparator pin of STRW6252 via IC2 (Opto-coupler). The comparator pin
also protects the box against short circuits and overload. The supply voltage
of STRW6252 is between 8.9V 17V at pin 4.
Circuit Diagram [Schematic]
Click on the circuit diagram to magnify
