(ExcellentIT calculations) I expected everything to run smoothly but after running it, all I get in the secondary output is +/- 2 volts!! Also the transformer makes an unpleasant noise. So, I used a 36v zener and as for turns ratio, (Primary 26 turns of 1.7mm ) and (Secondary 2X4 turns of.7mmX5) are my winding. The only difference is that I adjusted the circuit for +36/-36 volts. I built it using the exact same parts written in the schematic. Hello everyone, I made a 50Khz SMPS using the schematic I have attached to my message. So I have two identical half bridge smps, each uses two mosfets and one IR2110 which drives the mosftets, both IR2110 are powered from a single small transformer and rectifier/voltage regulator. SG5325 and IR2110 do make a good combination for an offline regulated half bridge, you don't need to use a 'dedicated half bridge driver' as DjLeco said. SG3525 is a voltage mode controller, which is right for the half-bridge topology, but typically requires type III compensation which you don't have. Circuit diagrams for the same smps pwm control output is used to drive the integrated MOSFET sg3525 ir2110. I’ve been trying to repair a 1.6A 5V SMPS.

Sg3525 ir2110 smps rar files