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Original question:

LM5158: About LM5158 SW pin voltage rising/falling time control in the SEPIC configurtion

LM5158: LM5158 PSR support

Eddie Chou
Expert 5840 points
Part Number: LM5158
Other Parts Discussed in Thread: LM5185

Tool/software:

Hi Team, 

May I check if LM5158 can support PSR voltage feedback like LM5185? customer want reduce one aux channel. 

Thanks & Regards

Eddie

  • 0
    TI__Mastermind 25730 points

    Hi Eddie,

    No, this is not possible.
    LM5158 can be used for PSR Flyback designs, but it is always necessary to have an aux winding for the FB voltage. I cannot be connected on the switch node as with LM5185.

    Please let me know if you have additional questions on the device.
    Best regards,
    Niklas