BQ25895: BQ25895 's current decreases after a few minutes of video playback after plugging in the charger

Hi,

What are your test conditions such as VBUS (voltage at VBUS pin), IVBUS, VBAT (voltage at BAT pin), IBAT, VSYS, ISYS?

Thanks,

Ning.

Hi：

  we used 5v regulated power supply to charge like Attached mp4 file。 the charge ic of bq25895 ony has VBUS ，VBAT，SYS。When there is a problem(charge current 0.7a) ，vbus：5.02v  ，vbat：3.78v ，sys：3.82v。

HI：

     When there is a problem(charge current 0.7a) ，the reg0B[4:3] is 00,What problem can you find by thr reg0c of fault valus,or other registers?

Hi,

Please visit https://e2e.ti.com/support/power-management/f/196/t/874557 for BQ2589X: Schematic Review and PCB Layout Design Tips and https://e2e.ti.com/support/power-management/f/196/t/875386 for BQ2589x/BQ25898x FAQs.

REG0C=02 indicates TS Warm fault. Please refer to 8.2.7.5 Thermistor Qualification on the d/s for the details.

Thanks,

Ning.

Hi:

  I have two questions：

 1 “Please refer to 8.2.7.5 Thermistor Qualification on the d/s for the details”，where is the 8.2.7.5

 2 when TS Warm fault，the charge ic begain to limit Current?

dir sir,

  thank you for your reply,i read the past page 22 and Combined with your answers，Can it be determined that the battery temperature is too high and cannot be charged？

Hi：

If the problem is caused by the high temperature of ts, can the threshold be raised through software？the reg10 is only read，i did not find some other register about the ts

Hi

Combined with ntc specification(As attached)，According to the calculation formula，the rt1 is 6.98k  the rt2 is 29.2k。We don’t have the corresponding precision resistor，so the rt1 used  6.04k，the rt2 used 30k，but Conversion temperature  should be normal，Is it so?

ECTH060303103F3435FST .pdf

HI  

  Is there a new driver on the platform of rockchip？If not, please provide a standard linux driver。