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TPS92638-Q1: TPS92638-Q1 REF and STOP pin setting

Tomohiro Nagasawa
Expert 1710 points
Part Number: TPS92638-Q1

Dear Support team

Please teach the setting of REF and STOP pins when not using swiching LED current function?

Regards

Tomohiro Nagasawa

  • 0
    TI__Expert 5475 points
    Hi Tomohiro-san,

    There are two reference pin in the TPS92638-Q1, one is REF, and the other is REFHI. Usually REFHI is controlled by STOP pin, I think you are referring to REFHI, right? If so, you can keep REFHI floating. For STOP pin, as there are only a weak pull down circuit on this pin, recommend to add a 100kohm pull down resistor to GND.