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I need to provide a 60V/1A power source from a 12-24V input, -40 to 85 degC temperature range. Parametric searches for DC/DC converters at a couple online vendors don't seem to be turning up much.

I'd prefer a simple chassis mount module of some kind, really.

Are there (readily available) DC/DC converters out there that satify these criteria? If not, how can I go about designing something that will work?

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Nat Semi Simple Switcher? Try the on-line design software here.

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  • \$\begingroup\$ I ended up going with National's LM5118... the web designer is a very nice tool. \$\endgroup\$ – darron May 19 '11 at 14:34
  • \$\begingroup\$ Try not to use electrolytic capacitors (they tend to dramatically lose capacitance at -40C) and make sure that you have ample cooling for the device - the MOSFET drivers inside the IC will dissipate power and it won't take much for the IC to reach OTP at 85C ambient. You could consider having high input-Z drivers outside the IC, moving the power from inside the package to outside of it. Make sure you have an external over-voltage protection circuit too, for safety. \$\endgroup\$ – Adam Lawrence May 19 '11 at 15:59
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If you don't mind building the SMPS yourself, here is a list of Linear Technology devices that match your criteria.

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  • \$\begingroup\$ Huh... I just tried that and didn't get any hits. I must have messed up the topology and didn't notice. \$\endgroup\$ – darron May 18 '11 at 17:23
  • \$\begingroup\$ Ah... I came in from a single small category, got distracted, then forgot that little detail when I came back to it. LTC3862 looks good to me. Thanks! \$\endgroup\$ – darron May 18 '11 at 17:43

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