The clasical answer would be that you need a switching power supply, 12 Volts in, +/- 20 out.
for example: www.national.com if you want to build such a supply.
http://www.national.com/appinfo/power/
(center page = design)
using 12 to 14 input, 20 volts @ 2 amps out suggests using a
LM2587-adj chip for the +20.
If I was doing it for an Industrial solution I would use a vicor supply (www.vicr.com) - but not cheap.
the 10 Amp part is not as easy though.
for example: www.national.com if you want to build such a supply.
http://www.national.com/appinfo/power/
(center page = design)
using 12 to 14 input, 20 volts @ 2 amps out suggests using a
LM2587-adj chip for the +20.
If I was doing it for an Industrial solution I would use a vicor supply (www.vicr.com) - but not cheap.
the 10 Amp part is not as easy though.
i think he's gonna need real FETs for this. the flyback or forward topology may be ok, but he is asking for 400VA, not that they can't be built for such.
in anycase, the center taps would be on the transformer, with an example being on page 1 of the datasheet. it looks like thre is 5A into the IC which means less then 5A on the transformer output.
in anycase the 2 designs are similar -- both pulse the transformer. the forward converter is lower noise but needs an extra primary and extra diode.
in anycase, the center taps would be on the transformer, with an example being on page 1 of the datasheet. it looks like thre is 5A into the IC which means less then 5A on the transformer output.
in anycase the 2 designs are similar -- both pulse the transformer. the forward converter is lower noise but needs an extra primary and extra diode.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.