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TPS563208: Shutdown performance

chentsu chung
Mastermind 6180 points
Part Number: TPS563208

Hi Team,

1. The waveform below was tested from TPS253201, does TPS263208 has the same performance?

2. For Figure34, Vout shutdown because of the UVLO 3.6V, am I right?

3. Does TPS56x20x has output discharge function?

4. About the Vout in red marked below, how TPS56x20x discharge so fast? by output load? or internal discharge?

5. What's TI's suggestion about output Cap related to discharging time. 

Thank you very much,

C.T.

  • 0
    TI__Expert 4795 points

    Hi CT

    1. The waveform below was tested from TPS253201, does TPS263208 has the same performance?

    [Vincent]This is caused by long cable inductance. If using a short cable, undershoot should be removed.

    2. For Figure34, Vout shutdown because of the UVLO 3.6V, am I right?

    [Vincent] Yes

    3. Does TPS56x20x has output discharge function?

    [Vincent] No.

    4. About the Vout in red marked below, how TPS56x20x discharge so fast? by output load? or internal discharge?

    [Vincent] By output load. It has constant current at the load.

    5. What's TI's suggestion about output Cap related to discharging time. 

    [Vincent] You can refer to recommend LC in datasheet.

    Best Regards,

    Vincent Zhang

  • 0 in reply to Vincent Zhang(BSR)
    Mastermind 6180 points

    Hi Vincent,

    Thanks for your help.

    About my question 1, what I mean is, the waveform was tested by TPS253201, if now using TPS253208 with the same condition, is it still the same performence like Figue34/35?

    Thank you.

    C.T.

  • 0 in reply to chentsu chung
    TI__Expert 4795 points

    Hi C.T.,

    Yes, they would show same performance.

    Best Regards,

    Vincent Zhang