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UCC21710: UCC21710: Bypassing OC Pin

Siddhant Vijay Gohil
Prodigy 10 points
Part Number: UCC21710

Hello,

I am using UCC21710 in Full-Bridge Power supply using 2 channel Half Bridge.

The frequency I am using is between 165-170kHz.

As I increase the duty cycle and reach up to 50% on Duty Cycle, it faults.

I am not using any shunt resistor at the source terminal of the MOSFET, and the signal from the source terminal is low pass filtered as per the design recommendations. Technically I assume it is short and should have any potential.

I wondered if there is a way not to use the overcurrent pin and use no protection in my power supply development circuit.

Thank You

Siddhant Gohil

  • 0
    TI__Genius 10652 points

    Siddhant,

    Could you please share a schematic of how you have connected the OC pin to COM/Fet-Source?

    Tieing the OC pin to COM directly completely disables it, use a 0-ohm resistor to do this, i am not exactly sure how one would use an LPF in this case.

    Best

    Dimitri