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UC2844: Operation of OCP?

David Kim2
Genius 3385 points
Part Number: UC2844


Hi

It formed Flybeck with UC2844.

What is the OCP operation of UC2844?

If you raise the current, the voltage drops, is this right?

Thanks

  • 0
    TI__Mastermind 33115 points

    David,

    Your understanding is correct. When the UC2844 CS > 1V the gate drive is reduced as the load current continues to increase (soft overload) and the output voltage will drop and this is a fundamental characteristic of all PWM controllers using peak current mode control. The deeper you move into overcurrent by continuing to increase the load, the more the output voltage drops and if the load is increased enough or a hard short-circuit is applied, the output voltage drops to 0V.

    Regards,

    Steve