The bq27546-G1 Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires minimal system microcontroller firmware development for accurate battery fuel gauging. The bq27546-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non-removable).
The bq27546-G1 uses the patented Impedance Track algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (min.), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.
The bq27546-G1 features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.
The device comes in a 15-ball Nano-Free DSBGA package (2.61 mm × 1.96 mm) that is ideal for space-constrained applications.
Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications up to 14,600-mAh Capacity
Microcontroller Peripheral Provides:
Internal or External Temperature Sensor for Battery Temperature Reporting
Lifetime Data Logging
64 Bytes of Non-Volatile Scratch Pad FLASH
Battery Fuel Gauging Based on Patented Impedance Track™ Technology
Models Battery Discharge Curve for Accurate Time-To-Empty Predictions
Automatically Adjusts for Battery Aging, Battery Self-Discharge, and Temperature/Rate Inefficiencies
Low-Value Sense Resistor (5 mΩ to 20 mΩ)
Advanced Fuel Gauging Features
Internal Short Detection
Tab Disconnection Detection
HDQ and I2C™ Interface Formats for Communication with Host System