BQ27620-G1 Datasheet, PDF (1/45 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27620-G1
www.ti.com
SLUSAE3 – OCTOBER 2012
System-Side Impedance Track™ Fuel Gauge with Dynamic Voltage Correlation
Check for Samples: bq27620-G1
1 INTRODUCTION
1.1 FEATURES
•123 Battery Fuel Gauge for 1-Series Li-Ion
applications based on Patented Impedance
Track™ Technology with Dynamic Voltage
Correlation (IT-DVC)
• Resides on System Main Board
• No Sense Resistor Required
• Powered directly from battery with integrated
LDO
• Supports embedded or removable Battery
Packs
• System Side Fuel-Gauge Provides:
– Accurate Battery Fuel Gauging; models the
Battery Discharge Curve for Accurate Time-
to-Empty Predictions
– Automatically Adjusts for Battery Aging,
Battery Self-Discharge, and
Temperature/Rate Inefficiencies
– Internal Temperature Sensor for Battery
Temperature Reporting
– Battery Low Interrupt Warning
– Battery Insertion Indicator
– Configurable Level of State of Charge (SOC)
Interrupts
– State of Health Indicator
– 32 Bytes of Non-Volatile Scratch-Pad FLASH
• 400-kHz I²C™ Interface for Connection to
System Microcontroller Port
• In a 15-Pin NanoFree™ (CSP) Packaging
1.2 APPLICATIONS
• Smartphones
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
1.3 DESCRIPTION
The Texas Instruments bq27620-G1 system-side is
an easy configure microcontroller peripheral that
provides fuel gauging for single-cell Li-Ion battery
packs. The device requires minimal user
configuration and system microcontroller firmware
development.
The bq27620-G1 uses the patented Impedance
Track™ algorithm with Dynamic Voltage Correlation
for fuel gauging. This patented process eliminates the
need for a sense resistor when calculating
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 bq27620-G1 requires
connections only to 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 nominal dimensions of 2610
× 1956 µm with 0,5 mm lead pitch. It is ideal for
space constrained applications.
Power
Management
Controller
TYPICAL APPLICATION
Host System
VCC
CE
LDO
Battery
Low
Voltage
Sense
I2C
DATA
Temp
Sense
bq27620
BAT_GD
PACK+
T
PACK-
Single Cell Li-lon
Battery Pack
PROTECTION
IC
FETs
CHG
DSG
SOC_INT
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 © 2012, Texas Instruments Incorporated