BQ25601: VBUS_STAT and CHRG_STAT value issue

jerry wang2

Prodigy 40 points

Part Number: BQ25601

Hi Ti support members，

I found when I pulg out Adapter，the REG08 value is still 0x74，VBUS_STAT is 011，CHRG_STAT is 10.

How can I juede there is no input device and charging stat is discharging？

thanks

over 5 years ago

0 ezhao over 5 years ago

TI__Genius 10240 points

Hi Jerry,

What are the components and values between BTST pin and SW pin? How much capacitance is there on the input? Can you measure the VBUS voltage and check the SW waveform after unplugging the adaptor?

0 jerry wang2 over 5 years ago in reply to ezhao

Prodigy 40 points

Hi Eric，

What are the components and values between BTST pin and SW pin? -- there is 47nF Capacitor.

How much capacitance is there on the input? -- the capacitor is 22uf+1uf+100nf

Can you measure the VBUS voltage and check the SW waveform after unplugging the adaptor?

--when I plugout the adapter,VBUS voltage is 3V, VBUS woltage is 12V when plugin the adapter.

you can check SW waveform from the jpg.

0 jerry wang2 over 5 years ago in reply to jerry wang2

Prodigy 40 points

Hi Eric,

Please help check our hw design.

Thanks

0 Ning T over 5 years ago in reply to jerry wang2

TI__Guru 54651 points

Hi,

1. Did you measure VBUS voltage at the VBUS pin? Is it 3V?

2. What are VBAT (voltage at BAT pin), IBAT, VSYS, ISYS before and after VBUS power source is removed?

3. Could you please provide all register values before and after VBUS power source is removed?

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

Thanks,

Ning.

0 jerry wang2 over 5 years ago in reply to Ning T

Prodigy 40 points

Hi Ning，

Thanks for repay.

Our HW colleague has fixed the issue，there is an HW fault.

thanks

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BQ25601: VBUS_STAT and CHRG_STAT value issue