Re:info about driver circuitry of PWM circuits

Thread Starter

robo5050

Joined Dec 6, 2007
15
Hello forum members,

I am looking for links/info regarding driver circuitry of PWM circuits;specifically I need information about what electronic discrete parts/I.C.'s,and circuit schema I would need will trigger/vary the Duty-Cycle of of a pwm circuit; that is,what electronic components can increase/decrease "duty-cycle" of project pwm circuit by proportionally increasing/decreasing trigger pulse frequency from project pwm driver circuit??? ∞:confused:

Thanks in advance for a reply/link!!typo
 
Last edited:

Thread Starter

robo5050

Joined Dec 6, 2007
15
Hello beenthere,
Thanks a lot for the link to the ebook;very informative,but I basicly know how a "pot" control sub-circuit operates for the pwm circuit!

What I am looking for,specifically,is a control sub-circuit for OPAMP/Comparator/
PWM IC that can vary the duty cycle as a one-shot,monostable vibrator can do,but also vary the duty-cycle of the pwm circuit PROportionally by the change
of this electronic projects pulse train frequency!!;)

Sorry for the long explanation,but there has got to be a trigger/control circuit for varying the duty cycle(F to V converter???) proportionally to the input pulse frequency,but as of yet,I have come up empty on my "pwm project" quest!!∞:(

Thanks a lot,however,for your reply;I will probably check epanorama's website for possible solutions for my needed pwm control circuit components since a potentiometer duty-cycle control,in itself,won't help me with my pwm
electronics project!!
 

Thread Starter

robo5050

Joined Dec 6, 2007
15
Hello beenthere,
Thanks a lot for the link to the ebook;very informative,but I basicly know how a "pot" control sub-circuit operates for the pwm circuit!

What I am looking for,specifically, is a control sub-circuit for OPAMP/Comparator/
PWM IC that can vary the duty cycle by one-shot ,monostable vibrator controlled input , and can vary the PWM duty-cycle proportionally by the change of this electronic projects pulse train frequency(instead of the potentiometer normally as the controller input to a pwm circuit;possibly with a hall-effect sub-circuit as part of the input control??)!!;)

Sorry for the long explanation,but there has got to be a trigger/control circuit for varying the duty cycle(F to V converter???) proportionally to the input pulse frequency,but as of yet,I have come up empty on my "pwm project" quest!!∞:(

Thanks a lot,however,for your reply;I will probably check epanorama's website for possible solutions for my needed pwm control circuit components since a potentiometer duty-cycle control,in itself,won't help me with my pwm
electronics project!!
 

beenthere

Joined Apr 20, 2004
15,808
If you can generate a pulse train, why not use it for the PWM control directly? Microcontrollers are just made for that sort of thing.
 
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