BQ27546-G1 Datasheet, PDF (1/38 Pages) Texas Instruments – nullSingle-Cell Li-Ion Battery Fuel Gauge

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
bq27546-G1
SLUSC53A – MAY 2015 – REVISED DECEMBER 2015
bq27546-G1 Single-Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration
1 Features
•1 Battery Fuel Gauge for 1-Series (1sXp) Li-Ion
Applications up to 14,500-mAh Capacity
• Microcontroller Peripheral Provides:
– Internal or External Temperature Sensor for
Battery Temperature Reporting
– SHA-1/HMAC Authentication
– Lifetime Data Logging
– 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 (5 mΩ to 20 mΩ)
• Advanced Fuel Gauging Features
– Internal Short Detection
– Tab Disconnection Detection
• HDQ and I²C™ Interface Formats for
Communication with Host System
• Small 15-Ball Nano-Free™ (DSBGA) Packaging
2 Applications
• Smartphones
• Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
3 Description
The bq27546-G1 Li-Ion battery fuel gauge is a
microcontroller peripheral that provides fuel gauging
for single-cell Li-Ion battery packs. The device
requires minimal system microcontroller firmware
development for accurate battery fuel gauging. The
bq27546-G1 resides within the battery pack or on the
system’s main-board with an embedded battery (non-
removable).
The bq27546-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), and temperature (°C). It also
provides detections for internal short or tab
disconnection events.
The bq27546-G1 features integrated support for
secure battery pack authentication, using the SHA-
1/HMAC authentication algorithm.
The device comes in a 15-ball Nano-Free™ DSBGA
package (2.61 mm × 1.96 mm) that is ideal for space-
constrained applications.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq27546-G1
YZF (15)
2.61 mm × 1.96 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
Single Cell Li -Ion Battery Pack
PACK+
REGIN
BAT
VCC
HDQ
SDA
SCL
PROTECTION
IC
CHG DSG
PACK–
FET
HDQ
SDA
SCL
SE
CE
TS
SRP
SRN
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.