BQ27510-G2 Datasheet, PDF (1/38 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection

bq27510-G2
www.ti.com
SLUS948 – AUGUST 2010
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
– 64 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
APPLICATIONS
• Smartphones
• PDAs
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
DESCRIPTION
The Texas Instruments bq27510-G2 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-G2 resides on the system’s main board and
manages an embedded battery (non-removable) or a
removable battery pack.
The bq27510-G2 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-G2 requires
only PACK+ (P+), PACK– (P–), and Thermistor (T)
connections to a removable battery pack or
embedded battery.
TYPICAL APPLICATION
Power
Management
Controller
Host System
VCC
REG25
REGIN
LDO
Battery
Low
Warning
Voltage
Sense
2
IC
DATA
Temp
Sense
bq27510-G2
Battery
Good
Current
Sense
PACK+
T
PACK-
Single-Cell Li-ion
Battery Pack
PROTECTION
IC
FETs ^CHG
DSG
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 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 © 2010, Texas Instruments Incorporated