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TPS92692-Q1: Power supply to Vin and inductor separately

Takahiro Saito
Expert 5455 points
Part Number: TPS92692-Q1
Other Parts Discussed in Thread: TPS92692

Hi team,

My customer wants to supply the power to Vin pin and inductor separately.

To Vin : 8V

To Inductor : 4V~6.5V   (4series NiMH battery)

Is it no problem for TPS92692?

Regards,

Saito

  • 0
    TI__Mastermind 18890 points

    Hello Saito-san,

    There can be an issue with soft-start if not done properly.  The TPS92692 will start the sequence of soft-start when power is present at it's VIN.  So the sequencing of power should be power to the inductor first then power to the TPS92692 so you can have a normal soft-start.  If the customer cannot gurantee that power sequence then they have to pull the Soft-Start cap to ground with an open collector transistor when the power to the inductor is not present.  Then the TPS92692 will operate properly with soft-start when they have power to the inductor.

    Thanks Tuan