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UCC28750: Flyback IC that can hold an overload state for 500ms or more

Conor
Guru 10680 points
Part Number: UCC28750
Other Parts Discussed in Thread: UC3842

Tool/software:

Hi,

I'm posting under the product name UCC28750, but I'm looking at TI's entire flyback lineup.

Is there anything that can hold an overload state for 500ms or more?

The use case assumes that it can be started when a large capacitance is connected to the output.

It would be fine to extend the overcurrent, but I'm looking for a way to avoid increasing the size of the transformer as much as possible.

Thanks,

Conor

  • 0
    TI__Mastermind 29985 points

    You can view/search TI's entire portfolio of flyback PWM controllers here. Search through the links I've circled below:

    Regards,

    Steve

  • 0 in reply to Steven Mappus1
    Guru 10680 points

    Hi Steve,

    In the TI store, I can't find devices using the sort function for how long the IC can hold up under overload.

    So I'm posting on E2E. I'd like some comments on my original question.

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Mastermind 29985 points

    Controllers are not typically specified this way. For example, any general purpose PWM controller (UC3842 and all derivatives) operating in peak current mode control, can continue to operate indefinitely in an over current condition, as long as the current sense and power stage are appropriately dimensioned. 

    Steve