Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge
Product details
Parameters
Package | Pins | Size
Features
- Battery Fuel Gauge and Protector for Single-Cell Li-Ion Applications
- Microcontroller Peripheral Provides:
- Precision 16-Bit, High-Side Coulomb Counter with Low-Value Sense Resistor
(5 mΩ to 20 mΩ) - External and Internal Temperature Sensors for Battery Temperature Reporting
- Lifetime and Current Data Logging
- 64 Bytes of Non-Volatile Scratch Pad Flash
- SHA-1 Authentication Capability
- Precision 16-Bit, High-Side Coulomb Counter with Low-Value Sense Resistor
- Battery Fuel Gauging Based on Patented Impedance Track™ Technology
- Models Battery Discharge Curve for Accurate Time-To-Empty Predictions
- Automatically Adjusts for Aging, Self-Discharge, and Temperature- and Rate-Induced Effects on Battery
- Integrated High-side NMOS Protection FET Drive
- Hardware-based Safety and Protection:
- Overvoltage (OVP)
- Undervoltage (UVP)
- Overcurrent in Charge (OCC)
- Overcurrent in Discharge (OCD)
- Short-Circuit in Discharge (SCD)
- I2C and HDQ Interface Formats for Communication with Host System
- Ultra-Compact, 15-Ball NanoFree™ DSBGA
Description
The Texas Instruments bq27742-G1 is a fuel gauge for single-cell Li-Ion battery packs that uses patented Impedance Track™ technology to deliver rate-, temperature-, and aging-compensated predictions of remaining battery capacity and system runtime with highest accuracy. The device also includes a fully integrated high-side protector that eliminates the need for a separate Li-Ion protection circuit and provides a full suite of high-accuracy fault detections for overvoltage, undervoltage, overcurrent in charge, overcurrent in discharge, and short-circuit in discharge conditions. The hardware protection functions offer built-in data flash-based programmability, allowing simple reconfiguration of existing devices for varying end equipment needs.
The fuel gauge provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime to empty (minutes), voltage (mV), current (mA), and temperature (°C), as well as recording vital parameters throughout the lifetime of the battery. The device also supports interrupts to the host to indicate detection of a variety of important battery conditions to the system.
The DSBGA is a 15-ball package (2.78 mm × 1.96 mm) that is ideal for space-constrained applications.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | bq27742-G1 Single-Cell Li-Ion Battery Fuel Gauge with Programmable Hardware Protection datasheet (Rev. D) | Jan. 16, 2018 |
| * | User guide | bq27742-G1 Single-Cell Impedance Track™ Battery Fuel Gauge TRM (Rev. C) | Jul. 20, 2015 |
| Technical article | How to run an Impedance Track gas gauge learning cycle | Mar. 02, 2016 | |
| Technical article | Battery Terms Decoded: Part 1 | Mar. 06, 2015 | |
| Technical article | Where’s the gauge? Part 3 | Feb. 11, 2015 | |
| User guide | bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module | Jan. 31, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The BQ27742EVM along with Battery Management Studio software provide the customer with tools for developing a battery fuel gauge module for placement inside a lithium-based battery pack. Customers are able to configure the BQ27742EVM so that it can provide accurate battery fuel gauging (...)
Features
- Complete evaluation system for the bq27742-G1 single cell Li-ion battery fuel gauge with programmable hardware protection
- Populated circuit module for quick setup
Description
The EV2400 EVM interface board enables an IBM-compatible or other type PC (with the required driver for its particular platform) to communicate with the Texas Instruments SMBus or I2C interface gas gauges via a Universal Serial Bus (USB) port. In addition to this board, PC software is required to (...)
Features
- Fully powered from the USB port
- Optional 5-V port for powering high power voltage drivers (future upgrade)
- Complete interface between the USB and SMBus, I2C (8/16) interfaces
- Expansion port for future upgrades
Software development
Features
- Real-time Gauge Dashboard for monitoring basic registers
- Full register access and logging
- Full data memory access and logging
- Product configuration and monitoring tools
- Import and export of product configurations
- Calibration and test automation
- Export of FS files for the target production environment
Gauging Parameter Calculator Chemistry ID matching for Impedance track gas gauges (GPCCHEM) is a math calculation and (...)
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
(...)
Reference designs
Design files
-
download TIDA-00238 BOM.pdf (76KB) -
download TIDA-00238 Gerber.zip (1003KB)
Design files
-
download TIDA-00030 BOM.pdf (33KB) -
download TIDA-00030 PCB.pdf (97KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| DSBGA (YZF) | 15 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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