Re: PWM controller, 0-100%, external VREF?
- From: Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_@xxxxxxxxxxx>
- Date: Sat, 02 Feb 2008 21:06:40 -0500
Rob wrote:
Hi,http://www.maxim-ic.com/appnotes.cfm/an_pk/3201
I'm trying to find what I thought would be very simple:
A PWM controller that can do 0-100% Duty Cycle and has an error amp WITHOUT VREF connected (i.e. I can supply VREF). I've checked every major supplier up and down with no luck.
I can get around current-mode control by summing OSC ramp with current comparator.
Something like SG1524 that does 0-100% duty cycle would be perfect. Any suggestions?
Rob.
going with something like that, you can mod it
to your wishes. That package has an extra op-amp
left of to use as an error amp if you wish..
Don't know what your application is but this does
work well.
it'll do 0..100% duty with no problem.
--
http://webpages.charter.net/jamie_5";
.
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- From: Rob
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