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Discussion Groups | Piclist | PLEASE TELL ME ABOUT "PWM CONTROL"

A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.

PLEASE TELL ME ABOUT "PWM CONTROL" - baghi_b - May 12 0:59:00 2004



HI ALL,
I NEED VERY VERY URGENT NEED TO KNOW HOW CAN I USE THE PIC MICRO
( SPECIALLY 18F458 ),TO HAVE A HALF-BRIDGE SWITCHING POWER SUPPLY,
WITH 25KHZ SWITCHING FREQUENCY.
BIG PROBLEM IS LOW RESPONSE OF A/D OF PIC TO CONTROL ACTIVELY THE
WIDTHS OF PWM ACCORDING TO OUTPUT FEEDBACK.
MAY I USE A TRICK FOR THIS PROBLEM AND FEED A FRACTION OF MY OUTPUT
DC VOLTAGE DIRECTLY TO PIC MICRO AND HAVE A GOOD REGULATION?
PLEASE HELP ME!
THANK YOU





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Re: PLEASE TELL ME ABOUT "PWM CONTROL" - Phil - May 15 17:27:00 2004

here's a good place to start:
<http://www.google.com/search?sourceid=navclient&ie=UTF-8&oe=UTF-
8&q=pwm+pic>

--- In , "baghi_b" <baghi_b@y...> wrote:
>
> HI ALL,
> I NEED VERY VERY URGENT NEED TO KNOW HOW CAN I USE THE PIC
MICRO
> ( SPECIALLY 18F458 ),TO HAVE A HALF-BRIDGE SWITCHING POWER SUPPLY,
> WITH 25KHZ SWITCHING FREQUENCY.
> BIG PROBLEM IS LOW RESPONSE OF A/D OF PIC TO CONTROL ACTIVELY THE
> WIDTHS OF PWM ACCORDING TO OUTPUT FEEDBACK.
> MAY I USE A TRICK FOR THIS PROBLEM AND FEED A FRACTION OF MY OUTPUT
> DC VOLTAGE DIRECTLY TO PIC MICRO AND HAVE A GOOD REGULATION?
> PLEASE HELP ME!
> THANK YOU



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