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TLV62569: boundary state between PSM mode and PWM mode

K.Yaita
Guru 29720 points
Part Number: TLV62569

Hi Team,

My customer is evaluating TLV62569 with TLV62569EVM.
He found yellow SW pin  pulse width is thinner than green.
The load current is around 0.4A and I believe it is boundary state between PSM mode and PWM mode in this case.

CH2 (white): inductor current
CH4 (red): SW pin voltage


Could you kindly tell me why yellow pulse is thinner than green one?

Best Regards,
Yaita / Japan disty

  • 0
    TI__Expert 3465 points
    Hello Yaita,

    it is a pleasure to support you. May I ask you how you setup your feedback devider (resistor values and feedforward capacitor), and if possible to superpose the waveform of the output voltage to the screenshot you sent me ?

    Best Regards,
    Emmanuel
  • 0 in reply to Emmanuel Granatello
    Guru 29720 points

    Hi Emmanuel-san,

    I appreciate for your kind support.
    I found TI Japan Goya-san contacted to you on email (off line). 

    Best Regards,
    Yaita