System-side(tm) fuel gauge with integrated Sense Resistor | battery gas gauge
Product details
Parameters
Package | Pins | Size
Features
- Single-Cell Li-Ion Battery Fuel Gauge
- Resides on System Board
- Supports Embedded or Removable Batteries
- Powered Directly from Battery with Integrated
LDO - Low-Value Integrated Sense Resistor
(7 mΩ, Typical)
- Easy-to-Configure Fuel Gauging Based on
Patented Impedance Track™ Technology- Reports Remaining Capacity and State-of-
Charge (SOC) with Smoothing Filter - Automatically Adjusts for Battery Aging, Self-
Discharge, Temperature, and Rate Changes - Battery State-of-Health (Aging) Estimation
- Reports Remaining Capacity and State-of-
- Microcontroller Peripheral Supports:
- 400-kHz I2C Serial Interface
- Configurable SOC Interrupt or
Battery Low Digital Output Warning - Internal Temperature Sensor or
Host-Reported Temperature
Description
The Texas Instruments bq27421-G1 fuel gauge is a minimally configured microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires very little user configuration and system microcontroller firmware development.
The bq27421-G1 fuel gauge uses the patented Impedance TrackTM algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV).
Battery fuel gauging with the bq27421-G1 fuel gauge requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny 9-ball, 1.62 mm × 1.58 mm, 0.5-mm pitch NanoFree™ chip scale package (DSBGA) is ideal for space-constrained applications.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
System-Side Battery Fuel (Gas) Gauge Solution Evaluation Module
The BQ27421EVM-G1A evaluation module is a complete evaluation system for the bq27421. The EVM includes one bq27421 circuit module with an integrated current-sense resistor. A separated orderable EV2400 PC interface board for gas gauge (...)Features
- Populated circuit module for quick setup and evaluation.
- Downloadable software that can be used for data logging and analysis.
- Related Terms:
- Battery Fuel Gauge Integrated circuit
- Battery Fuel Gauge IC
- Battery Fuel Gauge Circuit
Description
System-Side Battery Fuel (Gas) Gauge Solution Evaluation Module
The BQ27421EVM-G1B evaluation module is a complete evaluation system for the bq27421. The EVM includes one bq27421 circuit module with an integrated current-sense resistor. A separated orderable EV2300 or EV2400 PC interface board for (...)Features
- Populated circuit module for quick setup and evaluation.
- Downloadable software that can be used for data logging and analysis.
- Related Terms:
- Battery Fuel Gauge Integrated circuit
- Battery Fuel Gauge IC
- Battery Fuel Gauge Circuit
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
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
(...)
Reference designs
Design files
-
download TIDA-00669 BOM.pdf (53KB) -
download TIDA-00669 Altium.zip (2496KB) -
download TIDA-00669 Gerber.zip (645KB)
Design files
-
download TIDA-00712 BOM.pdf (128KB) -
download TIDA-00712 Assembly Drawing.pdf (126KB) -
download TIDA-00712 PCB.pdf (225KB) -
download TIDA-00712 Altium.zip (572KB) -
download TIDA-00712 Gerber.zip (307KB)
Design files
-
download TIDA-00586 BOM.pdf (51KB) -
download TIDA-00586 Altium.zip (1392KB) -
download TIDA-00586 Gerber.zip (372KB)
Design files
-
download TIDA-00055 BOM.pdf (76KB) -
download TIDA-00055 PCB.pdf (165KB)
Design files
-
download TIDA-00053 BOM.pdf (35KB) -
download TIDA-00053 PCB.pdf (190KB)
Design files
-
download TIDA-00045 BOM.pdf (30KB) -
download TIDA-00045 PCB.pdf (231KB)
Design files
-
download TIDA-00044 BOM.pdf (42KB) -
download TIDA-00044 PCB.pdf (132KB)
Design files
-
download TIDA-00042 BOM.pdf (33KB) -
download TIDA-00042 PCB.pdf (95KB)
Design files
-
download TIDA-00031 BOM.pdf (32KB) -
download TIDA-00031 PCB.pdf (69KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
DSBGA (YZF) | 9 | 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
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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