1 Features

1• Automotive-Qualified AEC-Q100, Grade 3

• 1-Series Cell Battery Fuel Gauge Supports Li-Ion,

LiFePO4, and NiMH (3-Cell) Chemistries

– Resides on System Board

– Powers Directly from the Battery with

Integrated LDO

– Supports a Low-Value External Sense Resistor

(10 mΩ)

• Learning Load Enable (LEN) from Host

• Ultra-Low Power Consumption in NORMAL

(50 μA) and SLEEP (9 μA) Modes

• Supports Replacement Batteries

• Accurate End-of-Service (EOS) Determination for

Batteries in Rarely Discharged Applications

• CEDV Gas Gauge for 1-Series Cell Batteries,

Providing:

– State-of-Charge (SOC)

– Time-to-Empty (TTE)

– State-of-Health (SOH)

• High-Side and Low-Side Current Sensing Options

• Internal Temperature Sensor OR External

Thermistor

• Microcontroller Peripheral Interface Supports:

– 400-kHz I2C™ Serial Interface

– Configurable Interrupt (ALERT) for SOC,

Battery Levels, Temperature Faults, and

Charge/Discharge Status

2 Applications

• eCall Systems

• Telematics Backup Systems

• Uninterruptible Power Supply (UPS) Backup

Systems

• Emergency Battery Power Modules

3 Description

The bq34210-Q1 1-Series Cell System-Side CEDV

Fuel Gauge provides fuel gauging and End-of-Service

(EOS) Determination for 1-series cell batteries in

applications that encounter infrequent discharge,

such as eCall systems and uninterruptible power

supplies (UPS) for backup during power failures,

where batteries may stay connected to a charging

power source most of their lifetime until needed. The

bq34210-Q1 fuel gauge supports multiple battery

chemistries, including Li-Ion, LiFePO4, and NiMH.

The gas gauging function uses voltage, current, and

temperature data along with Compensated End-of-

Discharge (CEDV) technology to provide State-of-

Charge (SOC) and State-of-Health (SOH) data. The

device's EOS Determination function alerts when

battery capability has degraded and is approaching

the end of its usable service.

Battery fuel gauging with the bq34210-Q1 fuel gauge

requires connections only to PACK+ (P+) and PACK–

(P–) for a removable battery pack or embedded

battery management system.