BQ24259: charge current issue

Sam Ting

Part Number: BQ24259
Other Parts Discussed in Thread: BQ24296M

Hi team,

My customer has a design with bq24259, but the charge current is only 100mA now, even we set the charge current with 2048mA.

The dumped register values are listed below. Could you help check and comment how to solve it? Thanks a lot!

More information: battery voltage= 3.9V, PSEL= 0V and R(ILIM)= 324 Ohm.

Best regards,

Sam Ting

over 5 years ago

0 Ning T over 5 years ago

TI__Guru 61301 points

Sam,

REG08 shows that the device is in DPM regulation. Please check VBUS pin voltage and input current. Please refer to 8.3.2.2 Dynamic Power Management on the d/s for the details.

BTW, Please visit https://e2e.ti.com/support/power-management/f/196/t/878463 for BQ2429X: Schematic Review and PCB Layout Design Tips and https://e2e.ti.com/support/power-management/f/196/t/875388 for BQ2419X/2429x FAQs. BQ24259 is similar to BQ24296M. FAQ#2 and #3 should be helpful for your questions.

Thanks,

Ning.

0 Sam Ting over 5 years ago in reply to Ning T

TI__Expert 3780 points

Hi Ning,

Thanks for your support!

Best regards,

Sam Ting

Power management

Power management forum

BQ24259: charge current issue