System-side fuel gauge with Dynamic Voltage Correlation, 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
- Easy To Configure Fuel Gauging Based on the
Dynamic Voltage Correlation Algorithm- Reports Remaining Capacity and State of
Charge (SOC) with Smoothing Filter - Automatically Adjusts for Self-Discharge,
Temperature, and Rate Changes
- 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
- Support 4.2-V, 4.3-V, and 4.35-V Chemistries
- 9-pin 1.62 × 1.58 mm, 0.5 mm pitch YZF package
Description
The Texas Instruments bq27621-G1 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 bq27621-G1 uses the Dynamic Voltage Correlation algorithm for fuel gauging. This process eliminates the need for a sense resistor when calculating remaining battery capacity (mAh), state-of-charge (%), battery voltage (mV), and temperature (°C).
Battery fuel gauging with the bq27621-G1 requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny 9-pin, 1.62 mm × 1.58 mm, 0.5 mm pitch YZF package is ideal for space-constrained applications.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | bq27621-G1 System-Side Fuel Gauge With Dynamic Voltage Correlation datasheet (Rev. E) | Jan. 06, 2016 |
| * | User guides | BQ27621-G1 Technical Reference Manual (Rev. C) | Aug. 27, 2014 |
| Technical articles | Where’s the gauge? Part 3 | Feb. 11, 2015 | |
| More literature | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | Aug. 18, 2014 | |
| User guides | Quick Start Guide for bq27621-G1 (Rev. A) | Jan. 20, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The BQ27621EVM-G1A evaluation module is a complete evaluation system for the bq27621-G1. The EVM includes one bq27621-G1 circuit module using DVC algorithm. The bq27621-G1 should be used with batteries with a charge voltage from 4.2 volts to 4.35 volts. A separate orderable EV2300 or (...)
Features
- Populated circuit module for quick setup and evaluation.
- Downloadable software that can be used for data logging and analysis.
Description
Note: EV2300 is not supported for 64-bit Windows (Windows 7 and newer). This product continues to be in production to support existing customers. Replaecd by EV2400 for new designs, – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
The EV2300 is a (...)
Features
- USB-based interface board for evaluation of battery fuel gauge circuits developed with fuel gauge ICs using the HDQ and SMBus communication protocol
- Provides interface between intelligent battery circuit and a Windows-based PC
- Connects to the USB port of a PC
- Allows for on screen display and (...)
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-00252 BOM.pdf (79KB) -
download TIDA-00252 Assembly Drawing.pdf (115KB) -
download TIDA-00252 PCB.pdf (201KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| DSBGA (YZF) | 9 | View options |
Ordering & quality
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Protections for high cell count applications
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