hello everybody,
I'm working in a switching transformer less power supply based on the great mc34063 ic.
I want a fare current capability and a duel output voltage supply that could reach 0v, so i will put it like this:
220/110v ac,60hz-------> -15v -0- +15v @ 3A, because I'm using a switching supply we would have some voltage ripple,i could deal with 100mv pk-pk .
after some
work i got these measurements -raw rectified dc-:
@ 220v AC, i got 306.6v dc and a max current of around 325mA,
@ 110v AC, i got 152.2v dc or so, and a max current of around 175mA,
so the first problem is the big voltage drop that should be present to run the mc34063 and the second problem is the the output current capability, the third is efficiency related problems.
oh! by the way, I'm using a capacitor based transformer less design, I already dealt with inrush current problems, so u don't need to worry about that.
please help!
thanks .