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UCC2808-1: max. duty 50%

Brian Wang0928
Genius 14040 points
Part Number: UCC2808-1

How to make PWM duty up to 50% with workaround solution?

How about to connect both pins of the FB and CS pin to Grounding pin and there is a capacitor on COMP? With this circuitry, is it possible the OUTA and OUTB can be output 50% duty?

Your comment is very highly appreciate!!

Regards

Brian W

  • 0
    TI__Guru 73495 points

    Hi,

    UCC2808 is a current mode controller device. So you still need to generate current signal to CS pin to turn off OUTA and OUTB. With FB = GND, you will need to play with current signal (slope) to get close to 50% duty.