Technical Specifications
- Package Type: WQFN-24 (24 pins).
- Control Interface: I²C serial interface for flexible, software-controlled charging parameters and status reporting.
- Input Optimization: Tailored to handle high-voltage inputs safely, optimizing power delivery while maintaining low power dissipation.
Common Hardware Deployments
This specific chip is widely deployed as the main USB charging controller in budget and mid-range mobile devices, including:
- Xiaomi Redmi 13C
- Xiaomi Poco C65
Symptoms of a Faulty BQ25891H IC
When this power management chip fails or degrades on a phone’s logic board, it typically presents the following hardware issues:
- Slow charging or completely non-functional charging.
- Fake charging, where the phone indicates it is plugged in but the battery percentage does not rise.
- Severe overheating around the logic board area during plug-in cycles.
- Rapid battery draining caused by an internal short circuit in the power path.
- No-power scenarios, where the device fails to boot because the system power path is broken.
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