Overview
The BQ27546YZFR-G1 is a highly integrated Li-Ion battery fuel gauge designed by Texas Instruments. This microcontroller peripheral is specifically engineered to provide accurate fuel gauging for single-cell Li-Ion battery packs. The device utilizes the patented Impedance Track™ algorithm to monitor battery capacity, state-of-charge, and other critical parameters. It requires minimal system microcontroller firmware development for accurate battery fuel gauging and can be integrated within the battery pack or on the system’s main-board with an embedded battery. The BQ27546YZFR-G1 also features secure battery pack authentication using the SHA-1/HMAC algorithm and supports HDQ and I2C communication interfaces for versatile connectivity.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 15-Ball Nano-Free™ DSBGA | - |
| Operating Temperature Range | -40°C to 85°C | °C |
| Battery Chemistry | Lithium Ion | - |
| Number of Cells | 1 | - |
| Maximum Battery Capacity | 14,500 mAh | mAh |
| Interface | HDQ, I2C | - |
| Sense Resistor Range | 5 mΩ to 20 mΩ | mΩ |
| Non-Volatile Memory | 64 Bytes of FLASH | - |
| Package Size | 2.61 mm × 1.96 mm | mm |
Key Features
- Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications up to 14,500-mAh Capacity
- Internal or External Temperature Sensor for Battery Temperature Reporting
- SHA-1/HMAC Authentication for Secure Battery Pack Authentication
- Lifetime Data Logging and 64 Bytes of Non-Volatile Scratch Pad FLASH
- Battery Fuel Gauging Based on Patented Impedance Track™ Technology for Accurate Time-To-Empty Predictions
- Automatic Adjustments for Battery Aging, Self-Discharge, and Temperature/Rate Inefficiencies
- Internal Short Detection and Tab Disconnection Detection
- HDQ and I2C Communication Interfaces for Versatile Connectivity
- Compact 15-Ball Nano-Free™ DSBGA Packaging Suitable for Space-Constrained Applications
Applications
The BQ27546YZFR-G1 is commonly used in a variety of portable electronics and battery-powered devices, including:
- Smartphones
- Tablets
- Digital Still and Video Cameras
- Handheld Terminals
- MP3 or Multimedia Players
- Wearables and other battery-powered consumer and industrial devices
Q & A
- What is the primary function of the BQ27546YZFR-G1?
The BQ27546YZFR-G1 is a Li-Ion battery fuel gauge that provides accurate fuel gauging for single-cell Li-Ion battery packs using the patented Impedance Track™ algorithm.
- What are the supported communication interfaces?
The device supports HDQ and I2C communication interfaces for versatile connectivity.
- What is the operating temperature range of the BQ27546YZFR-G1?
The operating temperature range is -40°C to 85°C.
- What is the maximum battery capacity supported by the BQ27546YZFR-G1?
The device supports battery capacities up to 14,500 mAh.
- Does the BQ27546YZFR-G1 support secure battery pack authentication?
Yes, it supports SHA-1/HMAC authentication for secure battery pack authentication.
- What type of package does the BQ27546YZFR-G1 come in?
The device comes in a 15-ball Nano-Free™ DSBGA package.
- What are some of the key features of the Impedance Track™ algorithm used by the BQ27546YZFR-G1?
The Impedance Track™ algorithm provides accurate time-to-empty predictions, adjusts for battery aging, self-discharge, and temperature/rate inefficiencies, and models the battery discharge curve.
- Does the BQ27546YZFR-G1 have internal short and tab disconnection detection?
Yes, it includes internal short detection and tab disconnection detection features.
- What is the purpose of the non-volatile memory in the BQ27546YZFR-G1?
The 64 bytes of non-volatile FLASH memory are used for lifetime data logging and other critical data storage.
- In what types of devices is the BQ27546YZFR-G1 typically used?
The BQ27546YZFR-G1 is typically used in smartphones, tablets, digital cameras, handheld terminals, MP3 players, wearables, and other battery-powered consumer and industrial devices.
