Hi,
Now we find BQ25606 can't into large current charger at Battery Volatge = 3V.
Then adjust VBAT to 3.4V and can into large current charger, why?
The below is BQ25606 schematic for your check again.
Thanks.
Best Regards,
Eric
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Hi,
Now we find BQ25606 can't into large current charger at Battery Volatge = 3V.
Then adjust VBAT to 3.4V and can into large current charger, why?
The below is BQ25606 schematic for your check again.
Thanks.
Best Regards,
Eric
Hi Hong,
Yes, I know this in fast charge mode.
But I find some stage that can't into fast charge mode from 2.5V to 3V.
Test Stage as below.
1. Set CV=2.5V then find precharge current is 123mA
2. Slow tuning Voltage to 3V then can't into fast charge current mode
3. Tuning CV to 3.15V then can intofast charge current mode
May I know if need to do some workaround to avoid unable to enter fast charge mode?
Thanks.
Regards,
Eric
Hi Hong,
Yes, I know has tolerance from Precharge to fast charge mode between 3V~3.24V.
But I also find sometimes need to 3.4V then into fast charge mode. --> Why?
Would you have any idea about this issue?
Thanks.
Best Regards,
Eric
Hi Hong,
I measure Failure BQ25606 waveform with VBUS/ BAT pin then find abnormal status as below.
Fig 1 & Fig 2 is different PCBA.
Please kindly provide your suggestion for our reference.
Thanks.
Fig 1. Blue is BAT voltage (3.07V), Yellow is VBUS waveform then Chagre Current is Failure (0mA).
Fig 2. Blue is BAT voltage (3.07V), Yellow is VBUS waveform then Chagre Current is OK (1.38A).
Regards,
Eric