bq25892 / Default register setting input Current Limit

S.Satoshi

Other Parts Discussed in Thread: BQ25892

Hi Everyone,

Please let me ask about default register setting input Current Limit value. The table.9 in datasheet state the default value is 500mA (REG00[5:0]=001000) but I checked it by using EVM then the register value was 3.25A (REG00[5:0]=111111). So I think that there is typo in datasheet or the revision of device on my EVM is old so it has different default value.

Please check it and give your comment.

Best Regards,

Sonoki / Japan Disty

over 9 years ago

0 Jeff F over 9 years ago

TI__Guru**** 165886 points

Per datasheet section 9.2.3.3.2 PSEL/OTG Pins Set Input Current Limit (bq25892), ILIM is set to 3.25A if PSEL pin is low. If PSEL is high, ILIM is 500mA.

0 jay claro over 8 years ago in reply to Jeff F

Prodigy 170 points

Hi jeff,

How do the Bq25892 decide if its usb charger or power supply?

Thanks,

Jay

0 Jeff F over 8 years ago in reply to jay claro

TI__Guru**** 165886 points

Jay,

The bq25892 does not have a USB interface. It relies on either a separate USB PHY chip or the host to set the final input current limit and VINDPM. The initial input current limit of 500mA or the external ILIM resistor can be set by the PSEL pin.

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bq25892 / Default register setting input Current Limit