Easy High Side Driver

Question

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

@MattyT2017 If you ask specific questions in your post, you'll get better answers. — Voltage Spike, Nov 09 '17 at 16:34

score 2 · Answer 1 · answered Nov 09 '17 at 13:19

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.

score 1 · Accepted Answer · answered Nov 09 '17 at 12:57

1

Use a P channel MOSFET like this: -

Taken from my answer to this Q and A

answered Nov 09 '17 at 12:57

Andy aka

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Could you reocmmened an SMT fet ideally D PAK that would suffice? – MattyT2017 Nov 09 '17 at 13:04
1

Product recommendations are generally off-topic. There are plenty of search engines in such places like Farnell, Digikey and Mouser etc.. – Andy aka Nov 09 '17 at 13:07

Easy High Side Driver

2 Answers2