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  1. #1
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    Transition mode boost PFC chip for isolated flyback use?

    hello,

    Can the UCC28051 be used for an offline, isolated flyback PFC supply of Vout=
    36V and 53W?

    Its just that i am concerned about how the opto transistor links in to the
    UCC28051 , especially considering the 2.7V overvoltage level on the Vo_SNS pin (pin 1)

    UCC28051 DATASHEET:
    AC/DC and DC/DC Power Supply - Power Factor Correction - UCC28051 - TI.com

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    Re: Transition mode boost PFC chip for isolated flyback use?

    I guess, you'll want to disable the OVP function by limiting the voltage from the optocoupler somehow. You also need to enforce a level above enable threshold.


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