Had a few issues with a high side using darlingtons etc - what would be simplist 3v3 logic driven hi side (12V output) driver (I'm thinming fet) that can handle 1-2A for running a solenoid, as a switch - frquncy is VERy low like on for 10 mins, off for 5 etc. tia

  • \$\begingroup\$ How about a smart switch / power distribution switch? \$\endgroup\$ – Terry Gould Nov 9 '17 at 13:15
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    \$\begingroup\$ @MattyT2017 If you ask specific questions in your post, you'll get better answers. \$\endgroup\$ – Voltage Spike Nov 9 '17 at 16:34

Use a P channel MOSFET like this: -

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Taken from my answer to this Q and A

  • \$\begingroup\$ Could you reocmmened an SMT fet ideally D PAK that would suffice? \$\endgroup\$ – MattyT2017 Nov 9 '17 at 13:04
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    \$\begingroup\$ Product recommendations are generally off-topic. There are plenty of search engines in such places like Farnell, Digikey and Mouser etc.. \$\endgroup\$ – Andy aka Nov 9 '17 at 13:07

You have multiple options:

  • P channel fet.
  • N channel fet with gate driver.
  • Relay.
  • PNP transistor.
  • NPN transistor with base driver.

Or, a you can get a smart high side power switch. Eg: ITS4142N.
Which basically is an N channel fet with booster circuit or even diagnostics and sensing in one package.


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