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UCC28730: Output voltage increase at no load.

David Kim2
Expert 2680 points
Part Number: UCC28730

Hi

Please refer to below.

-SPEC-

Input: AC 220V

Output: 5V 0.6A

At output current 0.6a, it is maintained at 5v, but increases to 6v at no load.

Let me know if you know how to solve it.

Thanks

  • 0
    TI__Guru 72635 points

    Hello,

    To keep the device in regulation you need a pre-load resistor.  Please load the output with a resistor that provides 1 to 2 mA at no load.  You may have to fine tune the resistor to get exactly the regulation you want.

    Regards,