BQ27531-G1 Datasheet, PDF (1/21 Pages) Texas Instruments – Battery Management Unit Impedance Track Fuel Gauge for Use With the bq2419x Charger Controller

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bq27531-G1
SLUSBE7 – MARCH 2013
Battery Management Unit Impedance Track™ Fuel Gauge for Use With the bq2419x
Charger Controller
Check for Samples: bq27531-G1
FEATURES
1
•23 Battery Fuel Gauge and Charger Controller for
1-Series Li-Ion Applications
• Resides on System Main Board
• Battery Fuel Gauge Based on Patented
Impedance Track™ Technology
– Models the Battery Discharge Curve for
Accurate Time-to-Empty Predictions
– Automatically Adjusts for Battery Aging,
Battery Self-Discharge, and
Temperature/Rate Inefficiencies
– Low-Value Sense Resistor (5 mΩ 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
• Run Time Improvements
– Longer battery runtime leveraging
Impedance Track technoloogy
– Tighter accuracy controls for charger
termination
– Improved recharged thresholds
• Intelligent Charging - Customized and adaptive
charging profiles
– Charger Control based on SoH
– Temperature Level Charging (TLC)
• Battery Charger Controller for bq2419x Single
Cell Switchmode Battery Charger
– Stand-Alone Charging Solution
– Ship mode capability
• 400-kHz I²C™ Interface for Connection to
System Microcontroller Port
• In a 15-Pin NanoFree™ (CSP) Packaging
APPLICATIONS
• Smartphones, Feature phones and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
DESCRIPTION
The Texas Instruments bq27531-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
device requires little system microcontroller firmware development. Together with bq2419x Single Cell
Switchmode Charger, the bq27531-G1 manages an embedded battery (non-removable) or a removable battery
pack.
The bq27531-G1 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 (min), battery voltage (mV),
temperature (°C) and state of health (%).
Battery fuel gauging with the bq27531-G1 requires only PACK+ (P+), PACK– (P–), and Thermistor (T)
connections to a removable battery pack or embedded battery circuit. The CSP option is a 15-ball package in the
dimensions of 2,61 mm × 1,96 mm with 0,5 mm lead pitch. It is ideal for space constrained applications.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Impedance Track, NanoFree are trademarks of Texas Instruments.
2
I²C is a trademark of NXP B.V. Corp Netherlands.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated