• Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications up to 14500-mAh Capacity
• Microcontroller Peripheral Provides:
  • Accurate Battery Fuel Gauging supports up to 14500 mAh
  • Internal or External Temperature Sensor for Battery Temperature Reporting
  • SHA-1/HMAC Authentication
  • 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 and 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
• Small 15-ball Nano-free™ (DSBGA) Packaging

• Smartphones
• Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players

The bq27545-G1 Li-ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development for accurate battery fuel gauging. The bq27545-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non removable).

The bq27545-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 (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The bq27545-G1 also 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.