Search found 3 matches

by kert
Sun Nov 03, 2013 5:20 pm
Forum: HBRIDGE: H-Bridge Motor Driver Shield
Topic: PWM frequency ?
Replies: 6
Views: 2362

Re: PWM frequency ?

I'll be trying it out today, will update on results here. Couple other small EE questions on the shield - the A4954 inputs are driven by 7408 gate, any particular reason why it couldnt be driven MCU outputs directly ? - it bugs me not to know - i have seen a few circuits with a nF cap (C4) across th...
by kert
Mon Oct 14, 2013 7:07 am
Forum: HBRIDGE: H-Bridge Motor Driver Shield
Topic: PWM frequency ?
Replies: 6
Views: 2362

Re: PWM frequency ?

So can the shield be safely driven at 20khz ?
by kert
Sat Oct 12, 2013 6:09 pm
Forum: HBRIDGE: H-Bridge Motor Driver Shield
Topic: PWM frequency ?
Replies: 6
Views: 2362

PWM frequency ?

Hi, Whats a reasonable peak PWM frequency that A495x can be driven at ? Hopefully i should be able to switch it above 20Khz without too many problems ? Obviously the switching losses will be higher with higher frequency. Unfortunately the datasheet doesnt even mention typical values at say 500hz, 1k...