TPS65982: TPS65982DC low power mode questions

John Liu59

Intellectual 2735 points

Part Number: TPS65982

Dear all,

I want to know if there is no USB device or adapter, will the TPS65982DC enter into low power mode?

and what will be it consuming power should be?

Thanks.

over 7 years ago

0 Eric Beljaars over 7 years ago

TI__Mastermind 36756 points

Hi John,

In that case, the TPS65982 can enter sleep mode if it is configured correctly. Quiescent current numbers are included in the TPS65982 datasheet for each power state.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

0 John Liu59 over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2735 points

Hi Eric,

I find the below data in the datasheet, so at sleep mode, the current is 71uA, so the total power is 3.3V*0.071=0.23mW, am I right?

0 John Liu59 over 7 years ago in reply to John Liu59

TI__Intellectual 2735 points

power consumption.docx

0 Eric Beljaars over 7 years ago in reply to John Liu59

TI__Mastermind 36756 points

Hi John,

Yes, that's correct. Please keep in mind that any device consuming current on the LDO_3V3 pin will add to this power consumption number.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

0 John Liu59 over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2735 points

Hi Eric,

Thanks for your answer. besides, is there any way to check if the system is sleep mode?

Thanks.

0 Eric Beljaars over 7 years ago in reply to John Liu59

TI__Mastermind 36756 points

Hi John,

If the TPS65982 is in Sleep mode, it will NAK the first I2C message sent to it and then wake up and respond. if the first I2C message is NAKed, it is in sleep mode.

If this answers your question, PLEASE select This resolved my issue

Thank you,

Eric

0 John Liu59 over 7 years ago in reply to Eric Beljaars

TI__Intellectual 2735 points

Thanks, Eric.

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TPS65982: TPS65982DC low power mode questions