BQ76PL455A Datasheet, PDF (1/125 Pages) Texas Instruments – 16-Cell Industrial Integrated Battery Monitor

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bq76PL455A
SLUSCL0A – SEPTEMBER 2016 – REVISED OCTOBER 2016
bq76PL455A 16-Cell Industrial Integrated Battery Monitor with Passive Cell Balancing
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
2 Applications
• Energy Storage (ESS) and UPS
• E-Bikes, E-Scooters
3 Description
The bq76PL455A device is an integrated 16-cell
battery monitoring and protection device, designed for
high-reliability, high-voltage industrial applications.
The integrated high-speed, differential, capacitor-
isolated communications interface allows up to
sixteen bq76PL455A devices to communicate with a
host through a single high-speed Universal
Asynchronous Receiver/Transmitter (UART)
interface.
The bq76PL455A 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 has features that customers may
find useful to help them meet functional safety
standard requirements. See Safety Manual for
bq76PL455A-Q1 (SLUUB67).
PART NUMBER
bq76PL455A
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)
Copyright © 2016, 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.