Single cell pack/System-side CEDV battery fuel (gas) gauge
Product details
Parameters
Package | Pins | Size
Features
- Battery Fuel Gauge For System-/Pack-Side
Configuration - Compensated End-of-Discharge Voltage (CEDV)
Gauging Technology- Adjusts for Battery Aging, Self-Discharge,
Temperature, and Rate Changes - Reports Remaining Capacity, State-of-Charge
(SOC), and Time-to-Empty with Smoothing
Filter - Battery State-of-Health Estimation
- Supports Embedded or Removable Packs
from 100-mAhr to 14,500-mAhr Capacity - Accommodates Pack Swapping with up to
Four Separate Battery Profiles - Supports a Raw Coulomb Counter To Provide
Delta Capacity Information
- Adjusts for Battery Aging, Self-Discharge,
- Microcontroller Peripheral Supports:
- SDQ Communication Interface for
Authentication ID - 400-kHz I2C™ Serial Interface for High-Speed
Communication - 32 Bytes of Scratch-Pad FLASH NVM
- Battery Low Digital Output Warning
- Configurable SOC Interrupts
- External Thermistor, Internal Sensor, or Host
Reported Temperature Options
- SDQ Communication Interface for
- 15-Pin 1.375 mm × 2.75 mm × 1.75 mm
Pitch NanoFree™ (DSBGA) Package
Description
The Texas Instruments single-cell bq27320 battery fuel gauge requires very minimal configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27320 uses the Compensated End-of-Discharge Voltage (CEDV) gas gauging algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C) and state-of-health (%).
TI customers can tune chemistry parameters using TIs web-based tool, GAUGEPARCAL.
Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.
Battery fuel gauging with the bq27320 requires only PACK+ (P+), PACK– (P–), and optional thermistor (T) connections to a removable battery pack or embedded battery circuit. The device uses a 15-ball NanoFree™ (DSBGA) package. It is ideal for space-constrained applications.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | bq27320 Single-Cell CEDV Fuel Gauge datasheet (Rev. A) | Mar. 28, 2016 |
User guide | bq27320 Technical Reference Manual (Rev. A) | Mar. 15, 2018 | |
Application note | Gauge Communication | Jan. 12, 2017 | |
Application note | Enhanced Resolution Gauging for Low Current Applications Using Scaling | Oct. 26, 2016 | |
User guide | bq27320 Evaluation Module User's Guide | Mar. 02, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The Texas Instruments bq27320 system-side li-ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell li-ion battery packs. The device requires minimal system microcontroller firmware development. The bq27320 uses the compensated end-of-discharge voltage gas (...)
Features
- Extremely simple setup and configuration
- Chemistry parameters can be self-tuned by customer without needing TI's support
- Configurable interrupts save system power and frees up host from continuous polling
Software development
Features
- Support for the EV2300
- Control multiple stations from a single graphical user interface
- Run up to 12 stations in parallel from a single computer
- Uses industry standard Motorola srec format Golden image programmer
- Calibration and test automation/programming
- Calibration limits filter to detect anomalies
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
Design tools & simulation
- Simple guide to CEDV data collection for gauging parameter calculator (GPC)
- Simple guide to chemical ID selection tool (GPC)
- Golden GG maker and resistance temperature compensation optimizer
GPC variants based on gas gauge types and type of optimization
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
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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