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UCC39002: How to load share with two LDO regulators using UCC39002

wells
Intellectual 460 points

Part Number: UCC39002

Hi Experts,

I want to load share with two LDO regulators using UCC39002. The input power voltage of LDO regulator is DC 12.8V. And the output of LDO is 12V. The current of one LDO is 12A. The shematics is attached. Please help review whether the schematics is correct and caculate the values of resistors and capacitors of UC39002 circuit. Thank you!

Best Regards,

Wells

0042.UC39002-MIC5158.pdf

  • 0
    TI__Genius 9140 points

    Hello Well,

    thanks for your interest in UCC39002.

    since I am not familiar with the LDO controller, please help to confirm whether the LDO has such functions that must have when working with UCC39002.

    1. The LDO should have romote sense capability or Vo adjust terminal.

    2. must not be able to sink current.(an output oring diode can prevent this)

    in order to get a correct value for UCC39002 external circuit, we also need to know the bandwidth of the LDO to fill into the calculator.

    you can follow the calculator added in the post to have the external circuit value.1348.UCC29002_Calc.xlsx

  • 0 in reply to David Huang33
    Intellectual 460 points

    Hello David,

    Thanks for your kind reply.

    I have resolved this issue. The two LDO regulators can load share using UCC39002.

    Best Regards,

    Wells