BQ78350 Datasheet, PDF (1/39 Pages) Texas Instruments – Battery Management Controller Companion

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Not Recommended for New Designs
bq78350
SLUSB48 – JULY 2014
bq78350 CEDV Li-Ion Gas Gauge and Battery Management Controller Companion to the
bq769x0 Battery Monitoring AFE
1 Features
• Compensated End-of-Discharge Voltage (CEDV)
Gauging Algorithm
• Supports SMBus Host Communication
• Flexible Configuration for 3- to 5-Series
(bq76920), 6- to 10-Series (bq76930), and 9- to
15-Series (bq76940) Li-Ion and LiFePO4 Batteries
• Supports Battery Configurations up to 320 Ahr
• Supports Charge and Discharge Current
Reporting up to 320 A
• External NTC Thermistor Support from
Companion AFE
• Full Array of Programmable Protection Features
– Voltage
– Current
– Temperature
– System Components
• Lifetime Data Logging
• Supports CC-CV Charging, Including Precharge,
Charge Inhibit, and Charge Suspend
• Offers an Optional Resistor Programmable
SMBus Slave Address for up to Eight Different
Bus Addresses
• Drives up to a 5-Segment LED or LCD Display for
State-Of-Charge Indication
• Provides SHA-1 Authentication
1
2 Applications
• Light Electric Vehicles (LEVs): eBikes, eScooters,
Pedelec, and Pedal-Assist Bicycles
• Power and Gardening Tools
• Battery Backup and Uninterruptible Power Supply
(UPS) Systems
• Wireless Base Station Backup Systems
• Telecom Power Systems
3 Description
The Texas Instruments bq78350 Li-Ion and LiFePO4
Battery Management Controller and companion to the
bq769x0 family of Analog Front End (AFE) protection
devices provides a comprehensive set of Battery
Management System (BMS) subsystems, helping to
accelerate product development for faster time-to-
market.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq78350
TSSOP (30)
7.80 mm x 6.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
bq76920
VC 5
VC 4
VC 3
VC 2
VC 1
VC 0
SRP
SRN
ALERT
BAT
REGSRC
REGOUT
CAP 1
TS 1
SCL
SDA
VSS
CHG
DSG
PUSH-BUTTON
FOR BOOT
PACK+
VCC
MRST
BAT
VAUX
KEYIN
PRES
RBI
SAFE
VSS
SCL
SDA
ALERT
PRECHG
GPIOA
GPIOB
LED 1
LED2
LED3
LED4
LED5
PWRM
DISP
COM
VEN
SMBC
SMBD
SMBA
ADREN
SMBC
SMBD
PACK–
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.