BQ34210-Q1 Datasheet, PDF (1/19 Pages) Texas Instruments – Automotive 1-Series Cell System-Side CEDV Fuel Gauge for Rarely Discharged Batteries

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bq34210-Q1
SLUSCG1 – AUGUST 2017
bq34210-Q1 Automotive 1-Series Cell System-Side CEDV Fuel Gauge
for Rarely Discharged Batteries
1 Features
•1 Automotive-Qualified AEC-Q100, Grade 3
• 1-Series Cell Battery Fuel Gauge Supports Li-Ion,
LiFePO4, and NiMH (3-Cell) Chemistries
– Resides on System Board
– Powers Directly from the Battery with
Integrated LDO
– Supports a Low-Value External Sense Resistor
(10 mΩ)
• Learning Load Enable (LEN) from Host
• Ultra-Low Power Consumption in NORMAL
(50 µA) and SLEEP (9 µA) Modes
• Supports Replacement Batteries
• Accurate End-of-Service (EOS) Determination for
Batteries in Rarely Discharged Applications
• CEDV Gas Gauge for 1-Series Cell Batteries,
Providing:
– State-of-Charge (SOC)
– Time-to-Empty (TTE)
– State-of-Health (SOH)
• High-Side and Low-Side Current Sensing Options
• Internal Temperature Sensor OR External
Thermistor
• Microcontroller Peripheral Interface Supports:
– 400-kHz I²C™ Serial Interface
– Configurable Interrupt (ALERT) for SOC,
Battery Levels, Temperature Faults, and
Charge/Discharge Status
2 Applications
• eCall Systems
• Telematics Backup Systems
• Uninterruptible Power Supply (UPS) Backup
Systems
• Emergency Battery Power Modules
3 Description
The bq34210-Q1 1-Series Cell System-Side CEDV
Fuel Gauge provides fuel gauging and End-of-Service
(EOS) Determination for 1-series cell batteries in
applications that encounter infrequent discharge,
such as eCall systems and uninterruptible power
supplies (UPS) for backup during power failures,
where batteries may stay connected to a charging
power source most of their lifetime until needed. The
bq34210-Q1 fuel gauge supports multiple battery
chemistries, including Li-Ion, LiFePO4, and NiMH.
The gas gauging function uses voltage, current, and
temperature data along with Compensated End-of-
Discharge (CEDV) technology to provide State-of-
Charge (SOC) and State-of-Health (SOH) data. The
device's EOS Determination function alerts when
battery capability has degraded and is approaching
the end of its usable service.
Battery fuel gauging with the bq34210-Q1 fuel gauge
requires connections only to PACK+ (P+) and PACK–
(P–) for a removable battery pack or embedded
battery management system.
PART
NUMBER
bq34210-Q1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
PW (14)
5.00 mm × 4.40 mm × 1.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
PACK+
LEN
Simplified Schematic
Learning
Load
ALERT
I2C
2.2 µF
SDA
SCL
VSS
NC
REG18
NC
REGIN
ALERT
NC
TS
NC
SRP
SRN
NC
Sense
Resistor
PACK –
1 µF
Copyright © 2017, Texas Instruments Incorporated
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.