Key Technical Specifications
- Input Voltage Range: Supports 3.9 V to 13.5 V input (with a 22 V absolute maximum rating).
- Charging Current: Delivers up to 3 A of buck switch-mode charging current for single-cell Li-Ion/Li-Polymer batteries.
- Control Interface: Uses an I²C interface for programmable settings like safety timers, charging current limits, and voltage thresholds.
- Smart Detection: Automatically detects USB SDP, DCP, and non-standard power adapters.
Common Applications & Compatible Phones
The chip serves as the primary or secondary charging controller across several major smartphone brands:
- Xiaomi/Redmi: Redmi Note 5, Note 5 Pro, Note 5A.
- Huawei: P Smart Z.
- Infinix: Hot series, Smart series (e.g., Infinix X608).
- Oppo, Vivo, Tecno & Samsung: Various mid-range and budget models.
Symptoms of a Failing BQ25601 IC
When this IC goes bad or gets damaged on the mobile motherboard, it typically causes the following hardware issues:
- Phone shows “fake charging” (plugged in, but battery percentage stays the same or drops).
- Entirely dead charging behavior (no response to any USB cable or charger).
- Extreme overheating or device heating up exclusively during a charging cycle.
- Phone failing to boot up due to a total breakdown in the primary power-path regulation.
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