2)You mention "At the moment the battery is inserted" as part of the test conditions. Is the VSYS = 0V behavior observed in test condition when battery is always connected then device transitions from charging battery to battery powering SYS when USB adapter at VBUS is removed?

0 ?? ? 10 个月前回复 Star Xu

Prodigy 10 points

1. I have read the status of REG07. The status of REG07 is as shown below.
2. When the battery is always inserted and the USB power supply is plugged in, the system outputs VSYS normally. But if the adapter is unplugged, VSYS quickly drops to about 0.04V.

0 Star Xu 10 个月前回复 ?? ?

TI__Guru*** 130456 points

您好，正在询问更了解这款芯片的TI工程师，稍后回复。

0 Star Xu 10 个月前回复 Star Xu

TI__Guru*** 130456 points

您好，Based off the REG07 status you shared BATFET is not being turned off. When the device is in battery only mode the BATFET is the only thing between BAT and SYS pins. Therefore, it seems the BQ24295 charger device is not the reason VSYS is dropping. Can you check if the battery protector is preventing the battery from discharging?

An alternate strategy to confirm the issue is not related to the IC is to check if a power supply connected at BAT or a battery simulator, such as a sourcemeter, is able to output to SYS normally when USB power supply is not present at VBUS.

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BQ24295: 求助，我的BQ24295无法在只有电池的时候工作