DC to DC converter PWM sg3525 SMPS control circuit transformer model based on integrated EE42/21/15 far as I know there was on the market. 4N35 opto feedback with Kubla made ​​stable driver output MOSFETs IRFZ48 4 You can use... Electronics Projects, 400W DC to DC Converter Power Supply Circuit SG3525 DCDC SMPS "dc dc converter circuit, power electronic projects, sg3525 circuit, " Date 2019/08/02