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ok ..i think the the problem will be from diode...or transistor...i will buy logic mosfet from digikey next week and some fast diode..but i am really think the problem from the diode.!
as i said i had tried 500khz..250khz..no results
here is my circuit
hi BradtheRad..i had tried 250khz and 500khz but the the vout fall and never rise..my inductor 15a & 28a saturation.i think that more enough to handle peak current and the resistance 10mohm...i am using electrolytic capacitor 25v 4500u and tried 100u & 1000u with no result. may be the diode not...
hi
i am trying to make dc_dc boost converter...vin 5v(old compurt power supply) vout 20v...load 27ohm.....i have 3.3u inductor 15a & 28a saturation ...transistor c5200.. Diode RF307
the problem is i cant reach above 11v. with 33khz reach 11.4v@16% duty and then the voltage fall when duty more...
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