BQ24773: BATDRV pin.

Don Greiner

Part Number: BQ24773

Hello, my question is on the battery drive pin , /BATDRV.

My question is on R(BATDRV_ON). It says "Measured by sourcing 10uA to BATDRV." It states that when BAT=16 and gate voltage is 9.5V, that R(BATDRV_ON) = 3.5Kohms. However, the math does not work out on this.

(16-9.5)V/10uA=650kohms. How is 3.5kohms determined?

Thank you

over 7 years ago

0 Wang5577 over 7 years ago

TI__Guru 56650 points

Don,

BATDRV can maintain typical 9.5V Vsrn-Vbatdrv with 10uA BATDRV load. This current isn't related to the internal resistance. The internal turn-on resistance is still 3.5kohm.

0 Don Greiner over 7 years ago in reply to Wang5577

Prodigy 40 points

Hi Wang,

Thanks for the quick reply. What is the absolute maximum current that can be sourced into the battery drive pin (BATDRV)?

Thank you

0 Wang5577 over 7 years ago in reply to Don Greiner

TI__Guru 56650 points

Don,

The spec table us 10uA as the test condition. So, it can only guarantee minimum 10uA capability.

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BQ24773: BATDRV pin.