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TPS61022: question

Yasushi Fujiwara
Genius 12725 points
Part Number: TPS61022

Hello Experts,

My customer has question as follows. Would you please answer them?
1. Will the device get damage/reverse current flow if the external supply voltage(less than rated voltage of VOUT-pin) is connected to VOUT-pin while device is normal operation?
2. Will the device get damage/reverse current flow if the external supply voltage(less than rated voltage of VOUT-pin) is connected to VOUT-pin when the input voltage is less than UVP or the EN-pin is "L"?

Best Regards,
Fujiwara

  • 0
    TI__Genius 9046 points

    Hi Fujiwara-san,

    See my reply per your questions:

    1. Will the device get damage/reverse current flow if the external supply voltage(less than rated voltage of VOUT-pin) is connected to VOUT-pin while device is normal operation?

    [WW]No reverse current is allowed when TPS61022 is in PFM operation. However, note reverse current is still allowed if device is in pass-though state or FPWM.


    2. Will the device get damage/reverse current flow if the external supply voltage(less than rated voltage of VOUT-pin) is connected to VOUT-pin when the input voltage is less than UVP or the EN-pin is "L"?

    [WW]The device shall be in true disconnection between input and output when shutdown.

    -Wenhao

  • 0 in reply to Wenhao Wu
    TI__Genius 12725 points

    Hi Wenhao,

    I just would like to confirm about answer of Q1.
    - The reverse current will not be flow if device is in PFM operation.
    - If device is in pass-through state or FPWM, the reverse current will flow. But device will not get damage.
    Is my understanding correct?

    Best Regards,
    Fujiwara

  • +1 in reply to Yasushi Fujiwara
    TI__Genius 9046 points

    Hi Fujiwara-san,

    - The reverse current will not be flow if device is in PFM operation ->Yes

    - If device is in pass-through state or FPWM, the reverse current will flow. But device will not get damage.->Cannot promise as how much current can flow through TPS61022 is not controlled. If reverse source has large current capability, this could break TPS61022.

    -Wenhao