Re: Allegro 3977

Hi,

The sense resistor has to be non-inductive and the "wire element"
type is an excellent choice.

I would like to caution anyone trying to build a drive with this or
any other monolithic type power IC to breadboard it on a printed
circuit board. Do not try to "wire" it up on a perforated breadboard.

It is essential to have good grounding and supply bypass for it to
work succesfully.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "ths992001" <thscarince@h...> wrote:
> Mariss,
>
> Ahhh, I didn't realize he was comparing it to a LR drive. I was
> picturing the L298 w/ those 2 Watt sense resistor.
>
> Any thoughts on a good sense resistor for the 3977? The closest
I've
> found are these non-inductive "wire element" resistors. But they
are
> overkill at 3 Watts. Tried looking at "normal" resistors in
> paralell, etc. but the available values just don't seem to work
out...
>
> - Tom S.