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UCC28600: ucc28600

Aravind Raghul
Prodigy 30 points
Part Number: UCC28600

hi,

I am using ucc28600 in our power module as per ti reference design. i have designed for 30W.when the input of this device is 440V DC this circuit is working fine when the input is changed to 680V DC with it's working fine we have tested with external load. while connecting with our circuit output voltage is  fluctuating. 

  • 0
    TI__Intellectual 880 points
    Hi Aravind,

    If a resistive load works well, but an external circuit does not, it could mean that the characteristics of the external circuit are adding noise back into the power supply.

    Make sure that the UCC28600 power supply can deliver full power with a resistive load at the input range. Then monitor the output with your external circuit. If the external circuit acts like a variable load, that will cause the output to fluctuate during the load changes similar to a transient.

    Regards,
    Davit