Hi Neil,

There are plenty of off-the-shelf H-bridge ICs. What current level do
you require, and what frequency of PWM (if any)?

Cheers, Bob

On Tue, Dec 16, 2014, at 10:17 AM, Neil wrote:
> Hi all,
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> I'm designing an H-Bridge to drive a 12V motor from a PIC, and I=20
> understand most of the basics and math, but not clear on when to use=20
> P-channel and N-channel FETs vs all 4 N-ch FETS.  I expected I'd use=20
> PFETs & NFETs, with smaller transistors on the gates of the P-FETs to=20
> get the gate up to 12V to switch off properly, but I've see examples to=20
> the contrary (using all N-FETs).  Is there a specific reason?
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> A pointer to a good H-bridge tutorial would be great.
>=20
> Thanks.

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