BQ76PL536 Datasheet, PDF (1/58 Pages) Texas Instruments – 3 to 6 Series Cell Lithium-Ion Battery Monitor and Secondary Protection IC for EV and HEV Applications

bq76PL536
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SLUSA08A – DECEMBER 2009 – REVISED JULY 2010
3 to 6 Series Cell Lithium-Ion Battery Monitor and Secondary Protection IC for EV and
HEV Applications
Check for Samples: bq76PL536
FEATURES
1
•2 3 to 6 Series Cell Support, All Chemistries
• Hot-Pluggable
• High-Speed SPI for Data Communications
• Stackable Vertical Interface
• No Isolation Components Required Between
ICs
• Industrial Temperature Range, –40°C to 85°C
• High-Accuracy Analog-to-Digital Converter
(ADC):
– ±3 mV Typical accuracy
– 14-Bit Resolution, 6-µs Conversion Time
– Nine ADC Inputs: 6 Cell Voltages, 1 Six-Cell
Brick Voltage, 2 Temperatures, 1
General-Purpose Input
– Dedicated Pins for Synchronizing
Measurements
• Configuration Data Stored in ECC-OTP
Registers
• Built-In Comparators (Secondary Protector)
for:
– Over- and Undervoltage Protection
– Overtemperature Protection
– Programmable Thresholds and Delay Times
– Dedicated Fault Output Signals for OV, UV,
OT
• Cell Balancing Control Outputs With Safety
Timeout
– Balance Current Set by External
Components
• Supply Voltage Range from 6 V to 30 V
Continuous and 36 V Peak
• Low Power:
– Typical 12-µA Sleep, 45-µA Idle
• Integrated Precision 5-V, 3-mA LDO
APPLICATIONS
• Uninterruptible Power Systems (UPS)
• E-Bike and E-Scooter
• Large-Format Battery Systems
• Electric and Hybrid Electric Vehicles
DESCRIPTION
The bq76PL536 is a stackable three to six series cell
lithium-ion battery pack protector and analog front
end (AFE) that incorporates a precision
analog-to-digital converter (ADC); independent cell
voltage and temperature protection; cell balancing,
and a precision 5-V regulator to power user circuitry.
The bq76PL536 integrates a voltage translation and
precision analog-to-digital converter system to
measure battery cell voltages with high accuracy and
speed.
The bq76PL536 provides full protection (secondary
protection) for overvoltage, undervoltage, and
overtemperature conditions. When safety thresholds
are exceeded, the bq76PL536 sets the FAULT
output. No external components are needed to
configure or enable the protection features.
Cell voltage and temperature protection functions are
independent of the ADC system. Programmable
protection thresholds and detection delay times are
stored in Error Check/Correct (ECC) OTP EPROM,
which increases the flexibility and reliability of the
battery management system.
The bq76PL536 is intended to be used with a host
controller to maximize the functionality of the battery
management system. However, the protection
functions do not require a host controller.
The bq76PL536 can be stacked vertically to monitor
up to 192 cells without additional isolation
components between ICs. A high-speed serial
peripheral interface (SPI) bus operates between each
bq76PL536 to provide reliable communications
through a high-voltage battery cell stack.
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.
PowerPAD is a trademark of Texas Instruments.
2
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 © 2009–2010, Texas Instruments Incorporated