BQ25601: BQ25601 charge status issue

Even Ho

Part Number: BQ25601
Other Parts Discussed in Thread: BQ25600,

Dear All

We have one question for can't charge done issue of BA25601.The pin9 STAT voltage always low even the charging with low time.

I have testing charge with four devices at room temperature.

2pcs devices are okay,battery voltage =4.052V and STAT change to high

2pcs device are fail, battery voltage = 4.041V & 4.042V and STAT always low even charging time over all night.

Could you help to check SW swtting and HW design?

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software register as below:

I2C_ByteWrite(BQ25601_ADDRESS, BQ25600_REG00,0x1F);//Input Curent Limit 3.2A

I2C_ByteWrite(BQ25601_ADDRESS, BQ25600_REG02,0x82);//0.12A Charge

I2C_ByteWrite(BQ25601_ADDRESS, BQ25600_REG03,0x00);// Termination Current Limit:0.06A, Pre-charge Current Limit:0.06A

I2C_ByteWrite(BQ25601_ADDRESS, BQ25600_REG04,0x30);

I2C_ByteWrite(BQ25601_ADDRESS, BQ25600_REG05,0x8F);

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over 3 years ago

0 Ning T over 3 years ago

TI__Guru 52991 points

Hi,

We will get back to you on the next business day.

Thanks,

Ning.

0 Ning T over 3 years ago in reply to Ning T

TI__Guru 52991 points

Hi,

Please visit https://e2e.ti.com/support/power-management/f/196/t/890624 for I2C controlled BQ2560X: Schematic Review and PCB Layout Design Tips.

Could you please provide all the BQ25601 register values when charge terminated and when still charging overnight respectively?

Thanks,

Ning.

0 Even Ho over 3 years ago in reply to Ning T

Prodigy 70 points

Dear All

Update BQ25601 register as below, we have charging all night, but the STAT status always keep low.

REG00=1F

REG01=1A

REG02=C2

REG03=00

REG04=32

REG05=8F

REG06=66

REG07=4C

REG08=74

REG09=00

REG0A=80

REG0B=11

0 Ning T over 3 years ago in reply to Even Ho

TI__Guru 52991 points

Hi,

The registers show the device is charging normally. How do you know the charge has been terminated?

Thanks,

Ning.

0 Even Ho over 3 years ago in reply to Ning T

Prodigy 70 points

Hi Ning

Because MCU always monitoring PIN4(STAT), the level is low even we charging all night over 8 hours.

Our question are some devices cannot charge done when we charging all night, but some devices are okay.

When we remove the power and re-charge these devices, they become charged done(STAT=HIGH).

Even

0 Ning T over 3 years ago in reply to Even Ho

TI__Guru 52991 points

Even,

We will get back to you on the next business day.

Thanks,

Ning.

0 Even Ho over 3 years ago in reply to Ning T

Prodigy 70 points

Dear Ning

Okay, could you review our I2C register is okay ot not?

Thanks!

Even Ho

0 Ning T over 3 years ago in reply to Even Ho

TI__Guru 52991 points

Even,

The register readings look normal.

Please note that "The charger device automatically terminates the charging cycle when the charging current is below termination threshold, battery voltage is above recharge threshold, and device not is in DPM mode or thermal regulation. When a fully charged battery is discharged below recharge threshold (selectable through VRECHG bit), the device automatically starts a new charging cycle." Please monitor VBUS (voltage at VBUS pin), IVBUS, VBAT (voltage at BAT pin), IBAT, VSYS, ISYS and all register values during charging process (similar to Figure 11. Battery Charging Profile on the d/s), then check if any there's any abnormal behaviors. Please show us the charger data when you think any there's any abnormal behaviors.

Thanks,

Ning.

0 Ning T over 3 years ago in reply to Ning T

TI__Guru 52991 points

Hi,

We have not heard back from you for a while. The thread is considered resolved and closed.

Thanks,

Ning

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BQ25601: BQ25601 charge status issue