BQ27621-G1_16 Datasheet, PDF (1/26 Pages) Texas Instruments – System-Side Fuel Gauge With Dynamic Voltage Correlation

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bq27621-G1
SLUSBB3E – DECEMBER 2013 – REVISED JANUARY 2016
bq27621-G1 System-Side Fuel Gauge With Dynamic Voltage Correlation
1 Features
•1 Single-Cell Li-Ion Battery Fuel Gauge
– Resides on System Board
– Supports Embedded or Removable Batteries
– Powered Directly from Battery with Integrated
LDO
• Easy To Configure Fuel Gauging Based on the
Dynamic Voltage Correlation Algorithm
– Reports Remaining Capacity and State of
Charge (SOC) with Smoothing Filter
– Automatically Adjusts for Self-Discharge,
Temperature, and Rate Changes
• Microcontroller Peripheral Supports:
– 400-kHz I²C Serial Interface
– Configurable SOC Interrupt or
Battery Low Digital Output Warning
– Internal Temperature Sensor or
Host Reported Temperature
• Support 4.2-V, 4.3-V, and 4.35-V Chemistries
• 9-pin 1.62 × 1.58 mm, 0.5 mm pitch YZF package
2 Applications
• Smartphones, Feature Phones, and Tablets
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players
3 Description
The Texas Instruments bq27621-G1 is a minimally
configured microcontroller peripheral that provides
system-side fuel gauging for single-cell Li-Ion
batteries. The device requires very little user
configuration and system microcontroller firmware
development.
The bq27621-G1 uses the Dynamic Voltage
Correlation algorithm for fuel gauging. This process
eliminates the need for a sense resistor when
calculating remaining battery capacity (mAh), state-
of-charge (%), battery voltage (mV), and temperature
(°C).
Battery fuel gauging with the bq27621-G1 requires
connections only to PACK+ (P+) and PACK– (P–) for
a removable battery pack or embedded battery
circuit. The tiny 9-pin, 1.62 mm × 1.58 mm, 0.5 mm
pitch YZF package is ideal for space-constrained
applications.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
BQ27621-G1
YZF (9)
1.62 mm × 1.58 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
SCL
I²C
Bus
SDA
ADC
BAT
CPU
GPOUT
BIN
VDD
1.8 V
0.47 µF
LDO
VSS
PACKP
T
1 µF
PACKN
Battery Pack
Protection
IC
Li-Ion
Cell
NFET NFET
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.