PWM driver

[Bruce Plecan]

-----Original Message-----
From: rauscher at icst.com <rauscher at icst.com>
To: DIY_EFI at efi332.eng.ohio-state.edu <DIY_EFI at efi332.eng.ohio-state.edu>
Date: Monday, February 01, 1999 3:26 PM
Subject: PWM driver

Might think about using two IRFZ20's
The surge on is big.  I think on a TRex pump we went to 25A fuses, once.
I'm no EE, but from what I looked at ganging some Power MOSFETs on the
output looked like the hot setup, then add or minus as ya want
Bruce


>
>
>I can throw together a circuit to do this. I've used PWM for DC motor
>control circuits before. How about a low side driver, it would be easier
>to do. (This is a switch that grounds the motor).
>
>For input control, just an analog 0-12V for stopped to full on, with
>all speeds in-between.
>
>I'll get it together and scanned hopefully before the week is out.
>
>Oh, do fuel pumps really draw 15 Amps? Ouch.
>
>One word of caution thou, PWM is electrically noisy. You will want to
>put the controller close to the pump, as not to disrupt every electrical
>device in your car.
>
>BobR.
>
>
>
><snip>
>
>Tom Sharpe wrote:
>
>>How do you PWM a 15 amp load??? Someone design a circuit please. Can the
driver
>>board be mase to work??
>>
>>TIA  TOM
>>
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