BQ76PL455A-Q1 Datasheet, PDF (1/130 Pages) Texas Instruments – 16-Cell EV/HEV Integrated Battery Monitor and Protector

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bq76PL455A-Q1
SLUSC51B – APRIL 2015 – REVISED DECEMBER 2015
bq76PL455A-Q1 16-Cell EV/HEV Integrated Battery Monitor and Protector
1 Features
•1 Monitors and Balances 6-to-16 Cells per Device
• Highly Accurate Monitoring
– High Performance 14-bit Analog-to-Digital
Converter (ADC) With Internal Reference
– All Cells Converted in 2.4 ms (Nominal)
– Eight AUX Inputs for Temperature and Other
Sensors with Input Voltage of 0 V to 5 V
– Internal Precision Reference
• Integrated Protector With Separate Vref for
Overvoltage (OV) and Undervoltage (UV)
Comparators and Programmable V_CELL Set Points
• Engineered for High System Robustness
– Up to 1-Mb/s Stackable Isolated Differential-
UART
– Up to 16 ICs in Daisy-Chain With Twisted Pair
– Passes Bulk Current Injection (BCI) Test
– Designed for Robust Hot-Plug Performance
• Passive Balancing with External n-FETs and
Active Balancing with EMB1428Q/EMB1499Q
• Can Help Customers Meet Functional Safety
Standard Requirements (For Example, ISO26262)
– Built-in Self-Tests to Validate Defined Internal
Functions
– Support for Open Wire Detection
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 2: –40°C to 105°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C3
2 Applications
• Electric and Hybrid Electric Vehicles (EV, HEV,
PHEV, Mild Hybrid)
• 48-V Systems (Single-Chip Solution)
• Energy Storage (ESS) and UPS
• E-Bikes, E-Scooters
3 Description
The bq76PL455A-Q1 device is an integrated 16-cell
battery monitoring and protection device, designed for
high-reliability automotive applications. The integrated
high-speed,
differential,
capacitor-isolated
communications interface allows up to sixteen
bq76PL455A-Q1 devices to communicate with a host
via a single high-speed Universal Asynchronous
Receiver/Transmitter (UART) interface.
The bq76PL455A-Q1 monitors and detects several
different fault conditions, including: overvoltage,
undervoltage, overtemperature, and communication
faults. Six GPIO ports as well as eight analog AUX
ADC inputs are included for additional monitoring and
programmable functionality. A secondary thermal
shutdown is included for further protection.
The bq76PL455A-Q1 has features that customers
may find useful to help them meet functional safety
standard requirements (for example, ISO26262). See
Safety Manual for bq76PL455A-Q1 (SLUUB67).
PART NUMBER
bq76PL455A-Q1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
TQFP (80)
12.00 mm × 12.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
All GND connections
are local to this IC. See
text for layout details.
Cell Balancing Circuits
Low Pass Filters -
Protection
High
Current
Bus
All GND connections
are local to this IC. See
text for layout details.
Cell Balancing Circuits
Low Pass Filters -
Protection
COMML+
COMML±
GND
FAULTL±
FAULTL+
COMMH+
COMMH±
FAULTH±
FAULTH+
COMML+
COMML±
GND
FAULTL±
FAULTL+
Differential
Signaling
Daisy-Chain
COMMH+
COMMH±
FAULTH±
To Additional
Battery Monitors
FAULTH+
Cell Temperature
Measurement
Texas Instruments
µC
C2000Œ
TMS570Œ
I/O Power
Supply
Highest Cell
(VSENSE16)
CAN Bus, etc.
VP
Cell Temperature
Measurement
Highest Cell
(VSENSE16)
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.