TPS7A66-Q1: PG question

Roy Chou1

Part Number: TPS7A66-Q1

Hi team,

I would like to know PG operation.

When the power is good, PG output will be high impedance and PG pin is pull high to Vout. So PG pin will be high.
When the power is not good(Vin=0), PG output will be low impedance and PG pin is pull high to Vout. So PG pin will be low.

Could you let me know how TPS7A66-Q1 to turn on the internal MOSFET when Vin = 0?

Regards,

Roy

over 3 years ago

0 Jason Song over 3 years ago

TI__Mastermind 23361 points

Hi Roy,

I am not quite understanding your question, will you help to clarify what you mean by having a Vin=0 for MOSFET turnning on?

Regards,
Jason Song

0 Roy Chou1 over 3 years ago in reply to Jason Song

TI__Genius 12635 points

Hi Jason,

Yes, that's my question.

Or PG only indicate output power status when IC has Vin.

Roy

0 Jason Song over 3 years ago in reply to Roy Chou1

TI__Mastermind 23361 points

Hi Roy,

The PG logic needs an internal circuit to be powered on to be functional. To answer your question, the PG function will need Vin to pass UVLO to be fully functional.

Regards,
Jason

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TPS7A66-Q1: PG question