Re: [CAD_CAM_EDM_DRO] Why Bipolar?

"Rich D." wrote:

> Jon,
> Please say what model chips these may be?
> Trying to learn.
> Rich D.
>
> Jon Elson wrote:
> Snip>>>>> know that! There are some simple International Rectifier MOSFET
> > driver chips that can be used to drive sets of power FETs. Driving the

I used the IR 2113 in a PWM servo amp, and they work real well. Each controls
only 2 FETs, though, one high-side and one low. And, they don't have a charge
pump for sustained on-state for the high-side FET. Another possibility is the
Harris HIP4080. It is listed as good for 80 V, but I think 50 V is more like the
practical limit. It will drive the 4 transistors for one coil of the stepper. It
is really more suited for a microstepping driver, but would work fine in a simple
full- or half-step circuit, you just wouldn't be using all its capabilities.

I seem to remember a new IR half-bridge driver that DOES have the charge pump
for the high side driver, but I don't remember the part number.

You can check the IR web pages at http://www.irf.com/dfGd7aMb/product-info/cic/

Good luck,

Jon