Recent content by bud17

Hi, I have built my first SMPS. I use IR2153 oscilator 50 kHz and 2x EE4215 ferrite core. Primary turn 40 turn (0.5mm 3 strand) and secondary turn 4 turn (0.5mm 8 strand). My first target is only 15V 20A, but when I attach load (DC Vacum Cleaner 12V 100Watt), output current only 3.5A. What's...

Thank you for your replay. Here is picture of bottom side and when this driver circuite running. Unfortunately I still do not have an oscilloscope. Now I am using IRF840 (after try to use IRF740 with the same result) with 10 ohm resistor on the gate. Yes, I installed ceramic capasitor for Ct...

Here is the picture mosfets installed. The lamp's light still poor and mosfet very-very hot.

Thank You for your replay. Ok, next I will attc picture of the PCB with mosfet installed. I had updated this schema and the mosfets not die again. But light of the lamp is very poor and all the mosfet is very hot. When I measure pin 1 Vcc (IR2153) to ground is 14.8 volt. But when I measure...

I update this circuit but all mosfet still is died. I try to test the IR2153 using LED and resistor with change Rt (2M) and Ct (47nf) the frequency aprox 7Hz and all LED lights FLIP-FLOP. Please advice.

I try buid simple SMPS driver and output connected to bohlamp (AC). Why all the mosfet always die but IR2153 is running well. Please help me. Thank You.

Hi Vorez and all member, I have ferrite core may be EER40. I get it from TV. Can I use this core to build Half Bridge SMPS? Thankyou.