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TLV62085: resonate

user4996066
Prodigy 20 points
Part Number: TLV62085

Dears,

when buck converter operate at PFM mode, what happen if operate frequency equal to LC resonate frequency?

how to guarantee operate frequency not drop to LC resonate frequency?

BR

SG

  • 0
    TI__Expert 8420 points

    Hi SG,

    The LC circuit at the output is not real resonance circuit. When the IC is operating in PFM mode, there is no current flowing back in the inductor therefore  no resonance would be seen on the output in PFM mode.,
    If you want to ensure the swtiching frequency is always above the resonance frequency, I would suggest to add a dummy load. 

    What is you main concern here?
    What application is it?

  • 0 in reply to Sabrina
    Prodigy 20 points
    Hi Sabrina,
    Thank you for your reply.
    My concern is oscillation happen at resonate frequency. it is used in SSD.