Electronics > Projects, Designs, and Technical Stuff
NPN driving P MOSFET on a chip
rea5245:
Hi,
When switching a P-channel MOSFET from a microcontroller, you typically do it through an NPN. It's so common that it would be nice if NPNs and P FETs were packaged together on a chip, sort of like a Darlington transistor. Is there such a beast?
Thanks,
Bob
Yansi:
You haven't done your (googling) homework, have you?
There is a metric crapton of high side switches, from the most stupid ones like UDN2981 or BSP450 up to quite smart ones for Automotive (for example VND7020) and Industrial applications (VNI8200XP)
//EDIT: Typo
rea5245:
I googled plenty for NPN driving P MOSFET and I looked on Digi-Key at transistor arrays. What I didn't know was the magic words "high side switch".
Thank you.
Yansi:
It is likely you could even find N and P mosfet combos in a single package, with various levels of resistor integration.
Not sure off-hand about any, haven't used any of those in my designs, but have seen such.
rea5245:
I wish I could find those combos. I've found the CTA2N1P but nothing else. And it's discontinued at Digi-Key, which is a little worrisome. (Mouser still has it though.)
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