ZHCSJL4A February 2019 – March 2019 BQ25883
PRODUCTION DATA.
After REGN LDO powers up, the device checks the current capability of the input source. The input source has to meet the following requirements in order to start the boost converter.
If VBUS_OVP is detected (condition 1 above), the device automatically retries detection once the over-voltage fault goes away. If a poor source is detected (condition 2 above), the device repeats poor source qualification routine every 2 seconds. After 7 consecutive failures, the device goes to HIZ mode. The battery powers up the system when the device is in HIZ. On BQ25883 adapter re-plugin and/or EN_HIZ bit toggle is required to restart device operation. The EN_HIZ bit is cleared automatically when the adapter is plugged in. If the fault is not removed, the part will enter HIZ mode again after the 7 consecutive failures.