SLUSB85E May 2013 – January 2016
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Supply Current
- 7.6 Digital Input and Output DC Characteristics
- 7.7 LDO Regulator, Wake-Up, and Auto-Shutdown DC Characteristics
- 7.8 ADC (Temperature and Cell Measurement) Characteristics
- 7.9 Integrating ADC (Coulomb Counter) Characteristics
- 7.10 Integrated Sense Resistor Characteristics, -40°C to 85°C
- 7.11 Integrated Sense Resistor Characteristics, -40°C to 70°C
- 7.12 I2C-Compatible Interface Communication Timing Characteristics
- 7.13 Typical Characteristics
- 8 Detailed Description
- 9 Applications and Implementation
- 10Power Supply Recommendation
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
Package Options
Refer to the PDF data sheet for device specific package drawings
Mechanical Data (Package|Pins)
- YZF|9
Thermal pad, mechanical data (Package|Pins)
Orderable Information
1 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
- Microcontroller Peripheral Supports:
- 400-kHz I2C Serial Interface
- Configurable SOC Interrupt or
Battery Low Digital Output Warning - Internal Temperature Sensor or
Host-Reported Temperature
2 Applications
- Smartphones, Feature Phones, and Tablets
- Digital Still and Video Cameras
- Handheld Terminals
- MP3 or Multimedia Players
3 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.
- For all available packages, see the orderable addendum at the end of the data sheet.
4 Revision History
Changes from D Revision (July 2015) to E Revision
- Changed Pin Configuration and FunctionsGo
- Changed Mechanical, Packaging, and Orderable Information Go
Changes from C Revision (December 2014) to D Revision
- Changed the Integrated Sense Resistor Characteristics, –40°C to 85°C specifications Go
- Changed the Integrated LDO Capacitor section Go
- Added Community Resources Go
Changes from B Revision (November 2014) to C Revision