Overview
The Texas Instruments BQ27441-G1A is a system-side Impedance Track™ battery fuel gauge designed for single-cell Li-Ion batteries. This device resides on the system board and supports both embedded and removable batteries. It is powered directly from the battery with an integrated Low Dropout (LDO) regulator, making it highly efficient and compact. The BQ27441-G1A requires minimal user configuration and system microcontroller firmware development, making it an ideal choice for various battery-powered applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VSON (DRZ) | - |
| Number of Pins | 12 | - |
| Package Size | 2.50 mm × 4.00 mm | - |
| Operating Temperature Range | -40°C to 85°C | °C |
| Storage Temperature Range | -65°C to 150°C | °C |
| Supply Current (Normal Mode) | 93 μA | μA |
| Supply Current (Sleep Mode) | 21 μA | μA |
| Supply Current (Hibernate Mode) | 9 μA | μA |
| I2C Serial Interface Frequency | 400 kHz | kHz |
Key Features
- Battery fuel gauging based on patented Impedance Track™ technology.
- Reports remaining capacity and state-of-charge (SOC) with a smoothing filter.
- Automatically adjusts for battery aging, self-discharge, temperature, and rate changes.
- Battery state-of-health (aging) estimation.
- Supports a low-value external sense resistor (10 mΩ).
- Internal temperature sensor or host-reported temperature.
- Configurable SOC interrupt or battery low digital output warning.
- 400-kHz I2C serial interface.
Applications
- Single-cell Li-Ion battery-powered devices.
- Portable electronics such as smartphones, tablets, and laptops.
- Wearable devices and fitness trackers.
- Industrial and medical devices requiring precise battery monitoring.
- Space-constrained applications due to its small package size.
Q & A
- What is the BQ27441-G1A used for?
The BQ27441-G1A is used for battery fuel gauging in single-cell Li-Ion battery applications.
- What is the Impedance Track™ technology?
Impedance Track™ technology is a patented algorithm used for high-accuracy battery fuel gauging, taking into account cell measurements, battery aging, self-discharge, temperature, and rate changes.
- What are the key specifications of the BQ27441-G1A package?
The BQ27441-G1A comes in a 12-pin VSON (DRZ) package with dimensions of 2.50 mm × 4.00 mm.
- How does the BQ27441-G1A adjust for battery aging and other factors?
The device automatically adjusts for battery aging, self-discharge, temperature, and rate changes to provide accurate state-of-charge and remaining capacity readings.
- What is the operating temperature range of the BQ27441-G1A?
The operating temperature range is -40°C to 85°C.
- Does the BQ27441-G1A support external sense resistors?
Yes, it supports a low-value external sense resistor (10 mΩ).
- What communication interface does the BQ27441-G1A use?
The device uses a 400-kHz I2C serial interface.
- Can the BQ27441-G1A be used in space-constrained applications?
Yes, its small package size makes it ideal for space-constrained applications.
- Does the BQ27441-G1A require significant user configuration?
No, it requires minimal user configuration and system microcontroller firmware development.
- What additional features does the BQ27441-G1A offer for battery monitoring?
The device offers configurable SOC interrupt, battery low digital output warning, and internal or host-reported temperature sensing.
