BQ24070: Inquiry about datasheet

Frank Sun

Intellectual 925 points

Part Number: BQ24070

Hi Sir,

BQ24070RHLR

I have some questions in datasheet, please help me clarify it.

What is meant of POR?

What is the "POR" condition drawn in the starting point of the flow chart in page 16 ? Input voltage to IN pin? Input voltage to BAT pin?

The other question is sleep mode in chapter "8.4.1 Sleep Mode of page 14.

Does Q2 ON in sleep mode work even if the POR * of the IC has never worked?

In other words, if the IC has no IN input even once and there is a battery connection, will the IC output battery voltage to the OUT pin via Q2?

Thank u.

Regards,

over 5 years ago

0 Raheem over 5 years ago

TI__Mastermind 21590 points

Hello Yumiko-San,

POR means power on reset. This just means the device get resets on power on. At POR, the input voltage will be regulated to 4.4V and battery is regulated to 4.2V.

Yes the battery voltage will be on OUT when VIN is not present.

0 Frank Sun over 5 years ago in reply to Raheem

Intellectual 925 points

One more Question,

When VIN of BQ24070 is not present and BQ24070 is sleep mode, do the TS pin output the current(100uA) or voltage?

If the TS pin does not output any current, is it no probrem that the TS pin is applied voltage(3.3V)?

0 Raheem over 5 years ago in reply to Frank Sun

TI__Mastermind 21590 points

Hello,

The current source is not active when VIN is absent but i wouldn't recommend a 3.3V source on the TS pin as the pin was designed only to be a current source for a resistor.

0 Frank Sun over 5 years ago in reply to Raheem

Intellectual 925 points

Thanks a lot

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BQ24070: Inquiry about datasheet