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Original question:

LM5116: Pre bias function

LM5116: full synchronous operation&Diode Emulation

Mike Lee88
Prodigy 80 points
Part Number: LM5116

Hi

In LM5116 datasheet mentioned,thanks.

1.What is mean full synchronous operation?

2.How the Diode Emulation works?

  • 0
    TI__Expert 6245 points
    I am passing this to our LM5116 expert, Tim
  • 0
    TI__Guru 72872 points
    Hi Mike,

    Fully synchonous operation means that the low-side FET conducts for the full 1 - D interval of the buck converter. Thus, both positive and negative inductor current occur at no-load or light-load conditions, and constant switching frequency is maintained.

    Diode emulation mode turns off the low-side FET when the inductor current reaches zero, thus preventing negative inductor current. This improves efficiency at light loads (as Fsw is reduced).

    Regards,
    Tim