BQ27741-G1_14 Datasheet, PDF (1/39 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge with Integrated Protection

bq27741-G1
www.ti.com
SLUSBF2 – JULY 2013
Single Cell Li-Ion Battery Fuel Gauge with Integrated Protection
Check for Samples: bq27741-G1
FEATURES
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•23 Battery Fuel Gauge and Protector for 1-Series
Li-Ion Applications
• Microcontroller Peripheral Provides:
– Accurate Battery Fuel Gauging Supports up
to 32 Ahr
– External and Internal Temperature Sensors
for Battery Temperature Reporting
– Precision 16-bit High-Side Coulomb
Counter with High-Side Low-Value Sense
Resistor (5 mΩ to 20 mΩ)
– Lifetime and Current Data Logging
– 64 Bytes of Non-Volatile Scratch Pad Flash
– SHA-1/HMAC Authentication
• Battery Fuel Gauging Based on Patented
Impedance Track™ Technology
– Models Battery Discharge Curve for
Accurate Time-To-Empty Predictions
– Automatically Adjusts for Aging, Self-
Discharge, and Temperature- and Rate-
Induced Effects on Battery
• Advanced Fuel Gauging Features
– Internal Short Detection
– Tab Disconnection Detection
• Safety and Protection:
– Over- and Undervoltage Protection with
Brown-out Low-Power Mode
– Overcharging and Discharging Current
Protection
– Overtemperature Protection
– Short-Circuit Protection
– Low-Voltage Notification
– Voltage Doubler to Support High-side NFET
Protection
• HDQ and I²C™ Interface Formats for
Communication With Host System
• Small 15-ball NanoFree™ (CSP) Packaging
APPLICATIONS
• Smartphones
• PDAs
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
DESCRIPTION
The Texas Instruments bq27741-G1 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 for accurate
battery fuel gauging. The fuel gauge resides within
the battery pack or on the system’s main board with
an embedded battery (non-removable). The fuel
gauge provides hardware-based over- and
undervoltage, overcurrent in charge or discharge, and
short-circuit protections.
The fuel gauge 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
(minimum), battery voltage (mV), and temperature
(°C), as well as recording vital parameters throughout
the lifetime of the battery.
The CSP is a 15-ball package (2.776 mm x 1.96 mm)
that is ideal for space-constrained applications.
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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, NanoFree are trademarks of Texas Instruments.
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I²C is a trademark of NXP B.V. Corp Netherlands.
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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