I'm testing a ir2153 based smps on breadboard. For the first time i switched on the circuit it turned on and gave 18.8V on output. Mains 220V ac is connected to the circuit using a 100W bulb in series. When i switched on the mains supply the bulb turned on for a fraction of a second and then turned off, this is for the first time I powered the circuit.
Immediately after turning off the supply, i touched the MOSFET and diodes to see if they are getting warm. Everything was normal. Then in the second run as i connected the mains supply the bulb firstly glow for a fraction of second and then started flashing and after that it remained turned on as if there is a short in the circuit.
I quickly disconnected the mains and check the MOSFETs and they both were gone. What is the reason behind this?
Circuit is attached below
C1 and C2 in the circuit is 330uF but i don't had those so i used 680uF ones, is this the reason?
Immediately after turning off the supply, i touched the MOSFET and diodes to see if they are getting warm. Everything was normal. Then in the second run as i connected the mains supply the bulb firstly glow for a fraction of second and then started flashing and after that it remained turned on as if there is a short in the circuit.
I quickly disconnected the mains and check the MOSFETs and they both were gone. What is the reason behind this?
Circuit is attached below
C1 and C2 in the circuit is 330uF but i don't had those so i used 680uF ones, is this the reason?