qolpa
Junior Member level 2
ml4800
hi,
i am using ML4800(PFC and PWM IC) for a battery charger circuit with PFC and topology is forward converter with a reset winding. something like in the below link.
**broken link removed**
i made the calculations with respect to application notes and datasheet. when i test my circuit with small voltages all the waveforms look allright but D3(in the picture above) draws some current and get hot. and when i start working with high voltage, then ML4800 couldnt get start because of PWM side of IC get shorted with ground internally. i think it could not drive pwm mosfet.
i could not solve the problem for a long time and looking for some advise.
any help will be appreciated. thanks in advance
hi,
i am using ML4800(PFC and PWM IC) for a battery charger circuit with PFC and topology is forward converter with a reset winding. something like in the below link.
**broken link removed**
i made the calculations with respect to application notes and datasheet. when i test my circuit with small voltages all the waveforms look allright but D3(in the picture above) draws some current and get hot. and when i start working with high voltage, then ML4800 couldnt get start because of PWM side of IC get shorted with ground internally. i think it could not drive pwm mosfet.
i could not solve the problem for a long time and looking for some advise.
any help will be appreciated. thanks in advance