BQ27520YZFR-G4 Datasheet, PDF (1/19 Pages) Texas Instruments – System-Side Impedance Track Fuel Gauge With Integrated LDO

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bq27520-G4
SLUSB20 – NOVEMBER 2012
System-Side Impedance Track™ Fuel Gauge With Integrated LDO
Check for Samples: bq27520-G4
FEATURES
1
•23 Single series cell Li-Ion battery fuel gauge
resides on system board
– Integrated 2.5 VDC LDO
– External low-value 10 mΩ sense resistor
• Patented Impedance Track™ technology
– Adjusts for battery aging, self-discharge,
temperature, and rate changes
– Reports Remaining Capacity, State of
Charge (SOC), and Time-to-Empty
– Optional Smoothing Filter
– Battery State of Health (aging) estimation
– Supports embedded or removable packs
with up to 32Ahr capacity
– Accomodates pack swapping with
2 separate battery profiles
• Microcontroller peripheral supports:
– 400-kHz I²C ™ serial interface
– 32 Bytes of Scratch-Pad FLASH NVM
– Battery Low digital ouptut warning
– Configurable SOC Interrupts
– External thermistor, internal sensor, or host
reported temperature options
• Tiny 15-pin 2610 × 1956 µm, 0.5 mm pitch
NanoFree™ (CSP) package
APPLICATIONS
• Smartphones, Feature phones and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
DESCRIPTION
The Texas Instruments bq27520-G4 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 bq27520-
G4 resides on the system’s main board and manages
an embedded battery (non-removable) or a
removable battery pack.
The bq27520-G4 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), temperature (°C) and state of
health (%).
Battery fuel gauging with the bq27520-G4 requires
only PACK+ (P+), PACK– (P–), and optional
Thermistor (T) connections to a removable battery
pack or embedded battery circuit. The device uses a
15-ball NanoFree™ (CSP) package in the nominal
dimensions of 2610 × 1956 µm with 0,5 mm lead
pitch. It is ideal for space constrained applications.
TYPICAL APPLICATION
Power
Management
Controller
Host System
VCC
CE
LDO
Battery
Low
Voltage
Sense
I2C
DATA
Temp
Sense
BAT_GD
SOC_INT
Current
Sense
PACK+
T
PACK-
Single Cell Li-lon
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, NanoFree are trademarks of Texas Instruments.
2
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