[chbot] H bridge warning!

Robin Gilks robin at gilks.org
Wed Feb 11 23:41:57 GMT 2015

> On Thu 12 Feb 2015 11:16:46 NZDT +1300, Robin Gilks wrote:
>> ** On checking, they use a 1K resistor which sets the slew rate at
>> approximately 8V/us. I reckon that means that out of every 64us at the
>> high rate, at least 6us is in the linear region i.e. about 10% of the
>> 240W
>> going through the circuit is lost in the bridge components.
> Can you change the slew rate limit accordingly? 7x PWM frequency, 7x
> slew rate limit?
> Volker

Not really - the range is about 2 to 10V/us. I say about as the high side
and low side are not totally symmetrical and switch on differs to switch
off as well.

The main thing is that I'm now cool...

Robin Gilks
Internet: robin at gilks.org    http://www.gilks.org
Tel:      (+64) (3) 347 4370

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