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bq76PL455A-Q1 Datasheet Preview

bq76PL455A-Q1 Datasheet

16-Cell EV/HEV Integrated Battery Monitor/Protector

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bq76PL455A-Q1
SLUSC51C – APRIL 2015 – REVISED NOVEMBER 2016
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 VCELL 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. 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)
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.




etcTI

bq76PL455A-Q1 Datasheet Preview

bq76PL455A-Q1 Datasheet

16-Cell EV/HEV Integrated Battery Monitor/Protector

No Preview Available !

bq76PL455A-Q1
SLUSC51C – APRIL 2015 – REVISED NOVEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 8
6.1 Absolute Maximum Ratings ...................................... 8
6.2 ESD Ratings ............................................................ 8
6.3 Recommended Operating Conditions....................... 9
6.4 Thermal Information .................................................. 9
6.5 Electrical Characteristics: Supply Current................. 9
6.6 VP 5.3-V Supply Regulation Voltage ...................... 10
6.7 VDD18 1.8-V Internal Digital Supply....................... 10
6.8 V5VAO Analog Supply ............................................ 10
6.9 VM –5-V Integrated Charge Pump ........................ 10
6.10 Analog-to-Digital Converter (ADC): Analog Front
End........................................................................... 10
6.11 ADC: VSENSEn Cell Measurement Inputs........... 11
6.12 ADC: VMODULE Input.............................................. 11
6.13 ADC: Post Board Assembly(6): VSENSEn Cell
Measurement Inputs ................................................ 12
6.14 ADC: AUXn General Purpose Inputs .................... 12
6.15 ADC: Internal Temperature Measurement and
Thermal Shutdown (TSD) ........................................ 13
6.16 Passive Balancing Control Outputs ...................... 13
6.17 Digital Input/Output: VIO-Based Single-Ended
I/O ............................................................................ 13
6.18 Digital Input/Output: Daisy Chain Vertical Bus ..... 14
6.19 Digital Input/Output: Wakeup ................................ 14
6.20 EEPROM............................................................... 14
6.21 Secondary Protector – Window Comparators ..... 14
6.22 Power-On-Reset (POR) and FAULT Flag
Thresholds ............................................................... 15
6.23 Miscellaneous ....................................................... 15
6.24 Typical Characteristics .......................................... 16
7 Detailed Description ............................................ 18
7.1 Overview ................................................................. 18
7.2 Functional Block Diagram ....................................... 19
7.3 Feature Description................................................. 19
7.4 Device Functional Modes........................................ 46
7.5 Command and Response Protocol ......................... 50
7.6 Register Maps ......................................................... 65
8 Application and Implementation ........................ 99
8.1 Application Information............................................ 99
8.2 Typical Application ................................................ 111
8.3 Initialization Set Up .............................................. 116
9 Power Supply Recommendations.................... 118
9.1 NPN LDO Supply .................................................. 118
10 Layout................................................................. 120
10.1 Layout Guidelines ............................................... 120
10.2 Layout Example .................................................. 120
10.3 Board Construction and Accuracy ...................... 121
11 Device and Documentation Support ............... 123
11.1 Device Support .................................................. 123
11.2 Documentation Support ..................................... 124
11.3 Receiving Notification of Documentation
Updates.................................................................. 124
11.4 Community Resources........................................ 124
11.5 Trademarks ......................................................... 124
11.6 Electrostatic Discharge Caution .......................... 124
11.7 Glossary .............................................................. 124
12 Mechanical, Packaging, and Orderable
Information ......................................................... 124
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (December 2015) to Revision C
Page
• Changed VSENSEn resister values From: 1 kΩ To: 100 Ω in Figure 24 ............................................................................ 45
• Deleted Z1, Changed C2 to 0.1 µF, RIN to 100 Ω, and R2 to 100 Ω in Figure 25 .............................................................. 99
• Changed 1 kΩ to 100 Ω in Figure 26 ................................................................................................................................. 100
• Changed RIN From: 1 kΩ To: 100 Ω in Figure 27 ............................................................................................................ 101
• Changed R24, R69, and R76 From: 1 kΩ To 100 Ω in Figure 28 ..................................................................................... 101
• Changed multiple resistors From: 1 kΩ To: 100 Ω in Figure 35......................................................................................... 111
• Deleted diode on TOP pin; Changed values of C19, C21, C22, C24, and C25 in Figure 36 ........................................... 112
• Deleted Z29; Changed values of C21, C33, C38, C40, and C41 in Figure 37 ................................................................. 113
• Changed R24, R69, and R76 From: 1 kΩ To: 100 Ω in Figure 38..................................................................................... 115
• Changed Equation 17......................................................................................................................................................... 118
2
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Copyright © 2015–2016, Texas Instruments Incorporated
Product Folder Links: bq76PL455A-Q1


Part Number bq76PL455A-Q1
Description 16-Cell EV/HEV Integrated Battery Monitor/Protector
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