BQ27532-G1 Datasheet, PDF (1/35 Pages) Texas Instruments – Battery Management Unit Impedance Track Fuel Gauge

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bq27532-G1
SLUSBU6B – SEPTEMBER 2014 – REVISED JANUARY 2016
bq27532-G1 Battery Management Unit Impedance Track™ Fuel Gauge
for bq2425x Charger
1 Features
•1 Battery Fuel Gauge and Charger Controller for 1-
Cell Li-Ion Applications up to 14,500-mAh
Capacity
• Resides on System Main Board
• Battery Fuel Gauge Based on Patented
Impedance Track™ Technology
– Models the Battery Discharge Curve for
Accurate Remaining Capacity Predictions
– Automatically Adjusts for Battery Aging,
Battery Self-Discharge, and Temperature and
Rate Inefficiencies
– Low-value Sense Resistor (5 to 20 mΩ)
• Battery Charger Controller With Customizable
Charge Profiles
– Configurable Charge Voltage and Current
Based on Temperature
– Optional State-of-Health (SoH) and Multi-Level
Based Charge Profiles
• Host-free Autonomous Battery Management
System
– Reduced Software Overhead Allows for Easy
Portability Across Platforms and Shorter OEM
Design Cycles
– Higher Safety and Security
• Runtime Improvements
– Longer Battery Runtime Leveraging
Impedance Track™ Technology
– Tighter Accuracy Controls for Charger
Termination
– Improved Recharge Thresholds
• Intelligent Charging – Customized and Adaptive
Charging Profiles
– Charger Control Based on SoH
– Temperature Level Charging (TLC)
• Stand-alone Battery Charger Controller for
bq2425x Single-Cell Switch-mode Battery Charger
• 400-kHz I²C™ Interface for Connection to System
Microcontroller Port
2 Applications
• Smartphones, Feature Phones, and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
1
3 Description
The bq27532-G1 system-side, Li-Ion battery
management unit is a microcontroller peripheral that
provides Impedance Track™ fuel gauging and
charging control for single-cell Li-Ion battery packs.
The fuel gauge requires little system microcontroller
firmware development. Together with bq2425x single-
cell switch-mode charger, the fuel gauge 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 (%), runtime-to-empty (minimum), battery
voltage (mV), temperature (°C), and SoH (%).
Battery fuel gauging with the device requires only
PACK+ (P+), PACK– (P–), and thermistor (T)
connections to a removable battery pack or
embedded battery circuit. The 15-pin NanoFree™
(CSP) package has dimensions of 2.61 mm × 1.96
mm with 0.5-mm lead pitch. It is ideal for space-
constrained applications.
PART NUMBER
bq27532-G1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
CSP (15)
2.61 mm × 1.96 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
4.35V t 10.5V
BQ2425x ^SW
VIN
SYS
SYSTEM LOAD
Charger BAT
PGND
I2C
SYSTEM LOAD
BQ27532-G1
BAT
REGIN
TS
CE
BI/TOUT
I2C
Application
VCC
Processor
SRP
SOCINT
VSS
SRN
Single Cell Li-Ion Battery Pack
P+
T
PROTECTION IC
P-
FETs
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.