How to generate pwm with sg3525 ic

[Kashif_932]

hi guys, i need some help here
i need to build a buck converter from 24v to 12v
i must generate pwm using sg3525.
but seems cant find much sg3525 used in buck converter..

CAN ANY ONE HELP ME HOW TO GENERATE PWM WITH IC ??



REGARDS;

 

[FvM]

The question sounds confused, because SG3525 is a PWM control circuit. What you probably mean is how to connect a buck switcher to the IC. SG3525 has two outputs with < 50 % duty cycle, so you would need to combine both outputs to drive the buck switch. SG3524 provides a simpler way to get > 50 % output duty cycle, so it's usually preferred. You also find a buc converter example in the datasheet. There's however room for improving the switching speed by using more sophisticated level translators.

 

[Kashif_932]

Actually i want to generate PWM through this IC and i have tried it but it is not working ... can you please send me any link from where i can get idea or any circuit that is helpful for me...

 

[schmitt trigger]

The 3525 is perhaps the most common PWM modulator in the world...googling SG3525 circuits will provide tens of thousands of hits.