pavandanyasi
Newbie level 6
Hai This is pavan .i am designing 65v/3amps flyback charger circuit with the reference circuit from PI.
when I connected the input supply through resistor (33ohms 10watt) in phase for protecting the circuit .when i switch on the supply the input current is going 3.5 amps .and resistor got very hot (burn). i thing some where short in primary side .but i am not clear what is the problem and how to find the exact problem . please tell me what is the problem . i have attached the circuit schematic .pls help me
Note: I did'not connect the zener diode (Vr1 160v) . because Vr1 is not available.
input voltage =110vac
output voltage=38vdc
input current =3.5amps This voltages i am getting
when I connected the input supply through resistor (33ohms 10watt) in phase for protecting the circuit .when i switch on the supply the input current is going 3.5 amps .and resistor got very hot (burn). i thing some where short in primary side .but i am not clear what is the problem and how to find the exact problem . please tell me what is the problem . i have attached the circuit schematic .pls help me
Note: I did'not connect the zener diode (Vr1 160v) . because Vr1 is not available.
input voltage =110vac
output voltage=38vdc
input current =3.5amps This voltages i am getting