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In Reply to: RE: Power supply design for low power PC posted by mschneider on January 6, 2009 at 09:39:16:
Hi Mark,
whether that 12V 1A is going to work depends on the current draw. At 1A, no way. At much lower current it might, let me know what current you need and I'll see if it will work or not.
Lower currents will work fine with the design as is, its just that the peak currents through the diodes can be made a little lower with a design optimized for the low current. It would be something like (these are off the top of my head not real numbers) at 1A you have 1.5A peak. At 0.5A you have 1A peak but you could get 0.7A peak with an optimized design.
Higher currents are a different story. Much above 2A is going to stress the chokes badly, they will get hot and probably will start buzzing. For higher currents it will definately take a different choke (the one that is one slot down in the 159 series. Its like 4mH I think) It will also take different cap values as well.
John S.
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Follow Ups
- RE: Power supply design for low power PC - John Swenson 01/6/0914:03:52 01/6/09 (2)
- RE: Power supply design for low power PC - mschneider 14:13:57 01/6/09 (1)
- RE: Power supply design for low power PC - John Swenson 16:51:32 01/6/09 (0)
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