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Forum Post: LM5575 Prototype Problems

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I've built up a circuit based on the SimpleSwitcher workbench to convert +12V to -48V. I built up 5.

When I first powered the units up, I got the expected -48V and was very pleased.

That was 3 days ago. Today, I find that most of them have the +12V to GND input shorted! (Those that aren't shorted are displaying a weird condition.)

Any suggestions? I'm stumped!

Thanks


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