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TPS560430: Phase margin

Ryo Akashi
Expert 8940 points
Part Number: TPS560430

Hello experts,

I have question about phase margin on WEBENCH simulation.
When I simulate with light load(~0.1A) for X(1.1MHz), XF(1.1MHz, FPWM), Y(2.2MHz), YF(2.2MHz, FPWM), only X was failed due to phase margin as below.
I can imagine FPWM is better stability for light load, but I'm not clear about the result difference between X and Y.
I'm not familiar with phase margin, so I would appreciate if you would give me comment about this question.
Also, if you have good app note related with this question, could you tell me?

Thanks and best regards,
Ryo Akashi
  • 0
    TI__Expert 8130 points

    Hi Ryo,

    What are your operating conditions? I would like to take a look at the WEBENCH model from my end.
    The stability should be good in both CCM and DCM mode.

    Let me check with the team internally if we have any great app notes in regards to this.

    Thanks,
    Alejandro