Описание
The Texas Instruments bq27421-G1 fuel gauge is an easy-to-configure microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires minimal 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.
- Resides on System Board
- Supports Embedded or Removable Batteries
- Powered Directly from Battery with Integrated LDO
- Low-value Integrated Sense Resistor
(7 mO, Typical)
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
- 400-kHz I2C Serial Interface
- Configurable SOC Interrupt or Battery Low
Digital Output Warning - Internal Temperature Sensor or Host-Reported
Temperature
