Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles
Product details
Parameters
Package | Pins | Size
Features
- Single-Cell Li-Ion Battery Fuel Gauge
- Resides in Pack or on System Board
- Supports Embedded or Removable Batteries
- Powers Directly from Battery with Integrated
LDO - Supports a Low-Value (10-mΩ) External Sense
Resistor
- Ultra-Low Power Consumption in NORMAL
(50 µA) and SLEEP (9 µA) Modes - Battery Fuel Gauging Based on Compensated
End-of-Discharge Voltage (CEDV) Technology- Reports Remaining Capacity and State-of-
Charge (SOC) with Smoothing Filter - Adjusts Automatically for Battery Aging, Self-
Discharge, Temperature, and Rate Changes - Provides 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 OR
External Thermistor
Description
The Texas Instruments bq27220 battery fuel gauge is a single-cell gauge that requires minimal user-configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27220 device uses the Compensated End-of-Discharge Voltage (CEDV) 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 (%).
The bq27220 battery fuel gauge has ultra-low power consumption in NORMAL (50 µA) and SLEEP (9 µA) modes, leading to longer battery runtime. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.
Customers can use preloaded CEDV parameters in ROM or can generate custom chemistry parameters using TIs web-based tool, GAUGEPARCAL. Custom-generated parameters can be either programmed in the device RAM by the host on power up of the system or customers can program the parameters to an onboard One-Time Programmable (OTP) memory.
Battery fuel gauging with the bq27220 device 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
Type | Title | Date | |
---|---|---|---|
* | Datasheet | bq27220 Single-Cell CEDV Fuel Gauge datasheet (Rev. A) | Apr. 11, 2016 |
* | User guide | bq27220 Technical Reference Manual | Apr. 12, 2016 |
Technical articles | Battery-charging tips for video doorbell applications | Apr. 15, 2019 | |
Technical articles | Achieving higher-accuracy battery fuel-gauge performance in ultra-low-power systems | May 09, 2017 | |
Application note | Gauge Communication | Jan. 12, 2017 | |
Application note | Enhanced Resolution Gauging for Low Current Applications Using Scaling | Oct. 26, 2016 | |
Application note | bq27220 Calibration Guide | May 24, 2016 | |
User guide | bq27220EVM-744 User's Guide | Apr. 11, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The BQ27220EVM-744 evaluation module is a complete evaluation system for the bq27220. The EVM includes one bq27220 circuit module with an external sense resistor. A separated orderable EV2400 PC interface board for gas gauge interface along with a PC USB cable, and Windows™-based PC software (...)
Features
- External sense and temperature sensor
- Quick and easy set-up
- Low power mode for active fuel gauging
- Small solution size is ideal for space-constrained applications
- CEDV+, Fixed profiles
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
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) | 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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