1 Features

1• Battery Fuel Gauge For System-/Pack-Side

Configuration

• Compensated End-of-Discharge Voltage (CEDV)

Gauging Technology

– Adjusts for Battery Aging, Self-Discharge,

Temperature, and Rate Changes

– Reports Remaining Capacity, State-of-Charge

(SOC), and Time-to-Empty with Smoothing

Filter

– Battery State-of-Health Estimation

– Supports Embedded or Removable Packs

from 100-mAhr to 14,500-mAhr Capacity

– Accommodates Pack Swapping with up to

Four Separate Battery Profiles

– Supports a Raw Coulomb Counter To Provide

Delta Capacity Information

• Microcontroller Peripheral Supports:

– SDQ Communication Interface for

Authentication ID

– 400-kHz I2C™ Serial Interface for High-Speed

Communication

– 32 Bytes of Scratch-Pad FLASH NVM

– Battery Low Digital Output Warning

– Configurable SOC Interrupts

– External Thermistor, Internal Sensor, or Host

Reported Temperature Options

• 15-Pin 1.375 mm x 2.75 mm x 1.75 mm Pitch

NanoFree™ (DSBGA) Package

2 Applications

• Smartphones, Feature Phones, and Tablets

• Wearables

• Building Automation

• Portable Medical/Industrial Handsets

• Portable Audio

• Gaming

3 Description

The Texas Instruments single-cell bq27320 battery

fuel gauge requires very minimal configuration and

system microcontroller firmware development, leading

to quick system bring-up. The bq27320 uses the

Compensated End-of-Discharge Voltage (CEDV) gas

gauging algorithm for fuel gauging, and provides

information such as remaining battery capacity

(mAh), state-of-charge (%), runtime-to-empty (min),

battery voltage (mV), temperature (°C) and state-ofhealth

(%).

TI customers can tune chemistry parameters using

TI's web-based tool, GAUGEPARCAL.

Configurable interrupts help save system power and

free up the host from continuous polling. Accurate

temperature sensing is supported via an external

thermistor.

Battery fuel gauging with the bq27320 requires only

PACK+ (P+), PACK– (P–), and optional thermistor (T)

connections to a removable battery pack or

embedded battery circuit. The device uses a 15-ball

NanoFree™ (DSBGA) package. It is ideal for spaceconstrained

applications.