BQ27520-G4 Datasheet, PDF (1/34 Pages) Texas Instruments – System-Side Impedance Track Fuel Gauge

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bq27520-G4
SLUSB20B – NOVEMBER 2012 – REVISED DECEMBER 2015
bq27520-G4 System-Side Impedance Track™ Fuel Gauge With Integrated LDO
1 Features
•1 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 32A hr Capacity
– Accommodates 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 Output Warning
– Configurable SOC Interrupts
– External Thermistor, Internal Sensor, or Host-
reported Temperature Options
• Tiny 15-pin, 2610 × 1956 µm, 0.5-mm pitch
NanoFree™ (DSBGA) Package
2 Applications
• Smartphones, Feature Phones, and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
3 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 fuel
gauge resides on the main board of the system and
manages an embedded battery (non-removable) or a
removable battery pack.
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), temperature (°C),
and state of health (%).
Battery fuel gauging 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™
(DSBGA) package in the nominal dimensions of 2610
× 1956 µm with 0.5-mm lead pitch. It is ideal for
space-constrained applications.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq27520-G4
DSBGA (15) 2.610 mm x 1.956 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Power
Management
Controller
Typical Application Diagram
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
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.