Texas Instruments BQ27520-G4 Handleiding

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BQ27520-G4 System-Side Impedance Track™ Fuel Gauge With Integrated LDO

1 Features

•Single-series cell Li-ion battery fuel gauge resides

on system board

–Integrated 2.5 VDC LDO

–External low-value 10-mΩ sense resistor

•Patented Impedance Track

™

technology

–Adjusts for battery aging, self-discharge,

temperature, and rate changes

–Reports remaining capacity, state-of-charge

(SOC), and time-to-empty

–Optional smoothing filter

–Battery state-of-health (aging) estimation

–Supports embedded or removable packs with

up to 14500-mAh capacity

–Accommodates pack swapping with two

separate battery profiles

•Microcontroller peripheral supports

–400-kHz I

2

C serial interface

–32 bytes of scratch-pad FLASH NVM

–Battery low digital output warning

–Configurable SOC interrupts

–External thermistor, internal sensor, or host-

reported temperature options

•Tiny 15-pin, 2610 × 1956 µm, 0.5-mm pitch

NanoFree

™

(DSBGA) package

2 Applications

•Smartphones, feature phones, and tablets

•Digital still and video cameras

•Handheld terminals

•MP3 or multimedia players

3 Description

The Texas Instruments BQ27520-G4 system-side Li-

ion battery fuel gauge is a microcontroller peripheral

that provides fuel gauging for single-cell Li-ion

battery packs. The device requires little system

microcontroller firmware development. The fuel gauge

resides on the main board of the system and

manages an embedded battery (non-removable) or a

removable battery pack.

The fuel gauge uses the patented Impedance Track™

algorithm for fuel gauging, and provides information

such as remaining battery capacity (mAh), state-of-

charge (%), run-time to empty (minimum), battery

voltage (mV), temperature (°C), and state of health

(%).

Battery fuel gauging 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 in the nominal dimensions of

2610 × 1956 µm with 0.5-mm lead pitch. It is ideal for

space-constrained applications.

Device Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

BQ27520-G4DSBGA (15)2.610 mm × 1.956 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

Host System

Single Cell Li-lon

Battery Pack

PACK-

PROTECTION

IC

CHG

DSG

Temp

Sense

SOC_INT

Current

Sense

T

PACK+

Voltage

Sense

Low

FETs

Power

Management

Controller

VCC

DATA

LDO

I2C

Battery

CE

BAT_GD

Typical Application Diagram

BQ27520-G4

SLUSB20C – NOVEMBER 2012 – REVISED NOVEMBER 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product specificaties