BQ27421YZFR-G1D屬于集成電路（IC）的電池管理。由美國德州儀器公司制造生產(chǎn)的BQ27421YZFR-G1D電池管理電池管理 PMIC（電源管理集成電路）系列產(chǎn)品可用于電池相關(guān)的監(jiān)測和控制功能，包括身份驗證、電池平衡、狀態(tài)監(jiān)測、電量計量、電源選擇、短路保護(hù)、過壓和欠壓保護(hù)等等。請注意，雖然該系列中的某些產(chǎn)品可能包括電池充電功能，但將充電功能作為主要功能的產(chǎn)品是單獨分類的。

1 Features

1? 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.