Overview
The Texas Instruments BQ27542DRZR-G1 is a sophisticated battery fuel gauge integrated circuit designed for single-cell Li-Ion battery packs. This device is part of the Impedance Track™ family and provides highly accurate battery fuel gauging, making it an ideal solution for a wide range of portable electronics. The BQ27542DRZR-G1 resides within the battery pack or on the main board of the system and requires minimal system microcontroller firmware development for accurate battery monitoring.
The fuel gauge uses the patented Impedance Track™ algorithm to model the battery discharge curve, providing accurate predictions of battery capacity, state-of-charge, time-to-empty, and time-to-full. It also features advanced fuel gauging capabilities, including automatic adjustments for battery aging, self-discharge, and temperature/rate inefficiencies.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Function | Battery Monitor | Battery Fuel Gauge |
| Battery Chemistry | Lithium-Ion | |
| Number of Cells | 1 | |
| Interface | HDQ, I²C | |
| Operating Temperature | -40°C to 85°C (TA) | |
| Package | 12-VFDFN Exposed Pad (12-SON, 2.5x4 mm) | |
| Maximum Battery Capacity | Up to 14,500 mAh | |
| Internal Temperature Sensor | Yes | |
| Authentication | SHA-1/HMAC | |
| Non-Volatile Memory | 64 Bytes of Non-Volatile Scratch Pad FLASH |
Key Features
- Accurate Battery Fuel Gauging: Supports up to 14,500 mAh capacity using the patented Impedance Track™ algorithm.
- Internal or External Temperature Sensor: For battery temperature reporting.
- Advanced Fuel Gauging Features: Automatically adjusts for battery aging, self-discharge, and temperature/rate inefficiencies.
- Secure Authentication: SHA-1/HMAC authentication for secure battery pack authentication.
- Low Power Modes: NORMAL, SLEEP, FULLSLEEP, and HIBERNATE modes to minimize power consumption.
- Internal Short and Tab Disconnection Detection: Detects internal short or tab disconnection events.
- HDQ and I²C Interface: Supports both HDQ and I²C communication formats.
- Small Package Size: 12-pin 2.50 mm × 4.00 mm SON package.
- Lifetime Data Logging: Logs battery data over its lifetime.
Applications
- Smartphones: Ideal for accurate battery monitoring in smartphones.
- Tablets: Suitable for tablets and other handheld tablets.
- Digital Still and Video Cameras: Used in cameras for efficient power management.
- Handheld Terminals: Applicable in various handheld terminals and devices.
- MP3 or Multimedia Players: Enhances battery life and efficiency in multimedia players.
Q & A
- What is the primary function of the BQ27542DRZR-G1?
The primary function of the BQ27542DRZR-G1 is to provide accurate battery fuel gauging for single-cell Li-Ion battery packs.
- What algorithm does the BQ27542DRZR-G1 use for fuel gauging?
The BQ27542DRZR-G1 uses the patented Impedance Track™ algorithm for fuel gauging.
- What are the supported communication interfaces for the BQ27542DRZR-G1?
The BQ27542DRZR-G1 supports both HDQ and I²C communication interfaces.
- What is the maximum battery capacity supported by the BQ27542DRZR-G1?
The BQ27542DRZR-G1 supports up to 14,500 mAh battery capacity.
- Does the BQ27542DRZR-G1 have internal temperature sensing capabilities?
Yes, the BQ27542DRZR-G1 has internal temperature sensing capabilities.
- What security features does the BQ27542DRZR-G1 offer?
The BQ27542DRZR-G1 offers SHA-1/HMAC authentication for secure battery pack authentication.
- What are the power modes available in the BQ27542DRZR-G1?
The BQ27542DRZR-G1 has NORMAL, SLEEP, FULLSLEEP, and HIBERNATE power modes to minimize power consumption.
- What types of devices can the BQ27542DRZR-G1 be used in?
The BQ27542DRZR-G1 can be used in smartphones, tablets, digital cameras, handheld terminals, and MP3 or multimedia players.
- What is the package size of the BQ27542DRZR-G1?
The BQ27542DRZR-G1 comes in a 12-pin 2.50 mm × 4.00 mm SON package.
- Does the BQ27542DRZR-G1 support lifetime data logging?
Yes, the BQ27542DRZR-G1 supports lifetime data logging.
