BQ24295: DPDM dectection fault

Zhanpeng Li

Part Number: BQ24295

Hi team,

meeting a question related to D+/D- dectection. we found that there will have small chance that our charger make wrong statue dectection whether doing DPDM.

the problem is that: sometimes the adapter could not be identifiy to the right adapter.

i attached the schemtic below:

the below picture is how they connect D+D-:

Brandon.

over 3 years ago

0 Ning T over 3 years ago

TI__Mastermind 49801 points

Brandon,

Referring to Table 2. bq24295 USB D+/D– Detection and Table 3. bq24295 Non-Standard Adapter Detection on the d/s, the device may detect limited adaptor types. After the charger input current limit detection is complete, the host may modify the input current limit via I2C as needed.

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.

Thanks,

Ning.

Power management

Power management forum

BQ24295: DPDM dectection fault