High input voltage power supply ...?
I need to design a dc-dc converter that can take an input voltage of 600Vdc and output 12Vdc. The current output is less than 100mA, but I still would like decent efficiency
Perhaps one of the "off-line" type designs used in computer/laptop supplies. Ive seen some rectify 240Vac and drop it to about 18V putting out 50W or so.
Any help finding semiconductors (controller ICs, switching transistors, diodes, etc.) rated up to 600V would be greatly appreciated.
Thanks in advance!
Update:I'm willing to do this in two stages if needed. First convert 600Vdc to any 'reasonable' voltage; then regulate to 12Vdc.
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You won't find much rated at 600 volts (you probably need 800 volts rating for a margin). What circuit do you plan on using? I doubt it needs more than a few parts rated for the high voltage. Probably diodes, capacitor and a power transistor. Diodes are no problem, 1N4007, for example. Caps, you may have to put 2 in series.
You can find MOSFETS (IRF830) that are good to 500 volts, and there may be some that are a bit higher. Otherwise you will need to put two in series.
This is a lot of work for 1 watt of power.
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