Re: [CAD_CAM_EDM_DRO] Want some help about L297 chip

yours_salman2002 wrote:

>Hello users
> I am using L297 in my project for first time,therefore i
>want some help.I want to set it's chopping frequency to 20Khz so
>which values should be used for resistor and capacitor?
> I see its formula but i can't solves it :( .
>another thing is i use four IRF540 mosfets with L297 and i set L297
>chopper mode to phase type not (INH)type so did it works with 8AMP
>stepper motor? also i don't uses INH1 INH2 outputs but i use sense
>inputs.
>
>

I don't think you can set the chopping frequency that way. It depends on
the inductance of the motor winding, the power supply voltage, and the
hysteresis of the current sensing amp.

Jon