Thanks LuV for PCB design More pictures and test results will upload very. Help me to change feedback.what should i do? Hello I wanted to share our SMPS based on IR2110 and SG3525. Without feedback there is no noisy sound and smps works fine.but when i connect a 300 watt load voltage droped about 20 volts. A feedback that control output voltage by decreas or increase duty cycle. Sg3525 Ir2110 Smps Rar File Extension Sg3525 Ir2110 Smps Rar Files I used for bobinating of the primar winding an number of 4 wires with a diameter of 0.6mm and for secoundary, two simetrical bobins made with 6 wires and the same diameter. The main transformer will be an ETD 49 wich it's made for an switching frecwenci of 70kHz and 62Vcc. I want to make an audio power supply and I don't need regulation, What I want it's an simple and robust design. Here is the scheme which I'm based (for the upper transistor) and for the lower one it's more easy.īefore driver I will use PWM oscillator SG3525 without regulation for output voltage. ![]() ![]() ![]() In the past I built some smps, but with transformer driver ( GTD ) and also I tryed the IC IR2110 ( and I couldn't made this to work.every time when I used this driver the IC and transistors burned.) I'm new in this domain and I want to make a smps with optocoupler driver.
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