About H-Bridge

Douglas · Joined: 27 Oct 2022 Posts: 1 Location: Banned - spammer

I have learned an article which talks about LMD18200 H-Bridge,
and I would like to know WHAT function it has?

newguy · Joined: 24 Jun 2004 Posts: 1909

An H-bridge is used to drive a DC motor. It allows forward/reverse rotation.

https://en.wikipedia.org/wiki/H-bridge

Ttelmah · Joined: 11 Mar 2010 Posts: 19549

and the key to understand is that if driving such a motor, the supply will
probably need to be a lot higher than the PIC can take. Therefore there
have to be level shift circuits between a logic signal and the two upper
transistors, and these will need a bootstrap supply to feed them.
This chip handles the level translataion, generates the bootstrap supply,
and contains the power FET;s themselves. Also a current limit shutdown
to handle overloads. All the hardware needed for driing a motor this way,
from a chip like the PIC.