BQ27510-G1 Datasheet, PDF (1/39 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection

bq27510-G1
www.ti.com ..................................................................................................................................................................................................... SLUS927 – APRIL 2009
System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection
FEATURES
1
•23 Battery Fuel Gauge for 1-Series Li-Ion
Applications
• Resides on System Main Board
– Works with Embedded or Removable
Battery Packs
– Uses PACK+, PACK–, and T Battery
Terminals
– Can be Powered Directly From Battery Pack
(no LDO required)
• Microcontroller Peripheral Provides:
– Accurate Battery Fuel Gauging
– Battery Low Interrupt Warning
– Battery Insertion Indicator
– 96 Bytes of Non-Volatile Scratch Pad
FLASH
• Battery Fuel Gauging Based on Patented
Impedance Track™ Technology
– Models 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 (10 mΩ or less)
• I²C™ for Connection to System
Microcontroller Port
• Small 12-pin 2,5 mm × 4 mm SON Package
TYPICAL APPLICATION
APPLICATIONS
• Smartphones
• PDAs
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
DESCRIPTION
The Texas Instruments bq27510 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 bq27510
resides on the system’s main board and manages an
embedded battery (non-removable) or a removable
battery pack.
The bq27510 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), and temperature (°C).
Battery fuel gauging with the bq27510 requires only
PACK+ (P+), PACK– (P–), and Thermistor (T)
connections to a removable battery pack or
embedded battery.
Power
Management
Controller
Host System
VCC
REG25
LDO
REGIN
Battery
Low
Warning
Voltage
Sense
2
IC
DATA
Temp
Sense
bq27510
Battery
Good
Current
Sense
PACK +
T
PACK -
Single-Cell Li-ion
Battery Pack
PROTECTION
IC
FETs ^CHG
DSG
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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 is a trademark of Texas Instruments.
2
I2C is a trademark of Phillips Corporation.
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 © 2009, Texas Instruments Incorporated