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UCC38C42: MAX sourcing current COMP pin?

Bond - James Bond
Expert 4940 points
Part Number: UCC38C42

Hello UCC38C42 Experts,

Do we have any information we can share on the max current sourcing capability of the COMP pin?

We specify a typ. and min. which makes good sense in traditional applications but now a special application requires knowledge of the max output current on the COMP Pin??

any guidance here?

  • 0
    TI__Mastermind 26495 points

    007,

    Unfortunately since the max sourcing current is not a measured parameter, we can only adhere to the min and typical values given in the data sheet. I found your question asked at least two other times on E2E and you can refer to these cases: case 1, case 2, for additional insight. My advise is that the typical 1 mA should be followed as the max value for normal operation. For abnormal operation, the COMP pin can be pulled LOW (GND) to command zero duty cycle and in this case the maximum sourcing current is internally limited to protect the error amp. You could connect COMP to GND and measure the current limit to confirm how much margin above 1 mA exists?

    Regards,

    Steve M