Texas Instruments | BQ7961x-Q1 Family of 12S, 14S, 16S Precision Automotive Battery Monitor, Balancer and Integrated Hardware Protector with up to SafeTITM-26262 ASIL-D Compliance | Datasheet | Texas Instruments BQ7961x-Q1 Family of 12S, 14S, 16S Precision Automotive Battery Monitor, Balancer and Integrated Hardware Protector with up to SafeTITM-26262 ASIL-D Compliance Datasheet

Texas Instruments BQ7961x-Q1 Family of 12S, 14S, 16S Precision Automotive Battery Monitor, Balancer and Integrated Hardware Protector with up to SafeTITM-26262 ASIL-D Compliance Datasheet
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BQ79612-Q1, BQ79614-Q1, BQ79616-Q1
SLUSDS8 – SEPTEMBER 2019
1 Features
3 Description
•
•
The BQ7961x-Q1 family of devices provides highaccuracy cell voltage measurements for a minimum
of 6S to a maximum of 12S (BQ79612-Q1), 14S
(BQ79614-Q1), or 16S (BQ79616-Q1) battery
modules in less than 200 µs. The integrated front-end
filters enable the system to implement with simple,
low voltage rating, differential RC filters on the cell
input channels. The integrated, post-ADC, low-pass
filters enable filtered, DC-like, voltage measurements
for better state of charge (SOC) calculation. This
device supports autonomous internal cell balancing
with temperature monitoring to auto-pause and
resume balancing to avoid an overtemperature
condition.
1
•
•
•
•
•
•
•
•
•
•
•
•
•
Qualified for automotive applications
AEC-Q100 Qualified with the following results:
– Device temperature grade 1: –40°C to +125°C
ambient operating temperature range
– Device HBM ESD classification level 2
– Device CDM ESD classification level C4B
SafeTI™-26262 ASIL-D compliance
– Cell voltage measurements
– Temperature measurements
– Communication
SafeTI™-26262 ASIL-B compliant
– OV, UV Protector (hardware comparators)
– OT, UT Protector (hardware comparators)
Pin-package and software compatible device
family:
– Stackable monitor 16S (BQ79616), 14S
(BQ79614), and 12S (BQ79612)
– Standalone monitor 48 V system (BQ75614)
Built-in redundancy path for voltage and
temperature diagnostics
Highly accurate cell voltage measurements within
128 µs for all cell channels
Integrated post-ADC configurable digital low-pass
filters
Supports bus bar connection and measurement
Built-in host-controlled hardware reset to emulate
POR-like device reset
Supports internal cell balancing
– Balancing current at 240 mA
– Built-in balancing thermal management with
automatic pause and resume control
Isolated differential daisy chain communication
with optional ring architecture
Embedded fault signal and heartbeat through
communication line
UART Host interface or connect to communication
bridge BQ79600
Built-in SPI master
The inclusion of the isolated, bidirectional, daisy chain
ports supports both capacitor- and transformer-based
isolation, allowing the use of the most effective
components
for
centralized
or
distribution
architectures commonly found in the xEV powertrain
system. This device also includes eight GPIOs or
auxiliary inputs that can be used for external
thermistor measurements.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
BQ79612-Q1(2)
BQ79614-Q1(2)
HTQFP (64-pin)
10.00 mm × 10.00 mm
BQ79616-Q1
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) Product Preview
Simplified System Diagram
Battery
Modules
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
12 V
DC-DC
To CAN
Bus
MCU
Balance and Filter Components
Balance and Filter Components
BQ7961x
bq79600
BQ7961x
bq79600
BQ79600
bq79600
NFAULT
NFAULT
UART or
SPI
UART or
SPI
COML
Isolation
Components
COMH
COML
COMH
COML
COMH
Capactive
Level-shifted Differential Interface
Optional Ring Connection
2 Applications
•
•
•
Full electric, plug-in hybrid, and hybrid vehicles
Automotive 48 V Li-Ion battery systems
Grid or energy storage battery systems (ESS)
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. ADVANCE INFORMATION for pre-production products; subject to
change without notice.
ADVANCE INFORMATION
BQ7961x-Q1 Family of 12S, 14S, 16S Precision Automotive Battery Monitor, Balancer and
Integrated Hardware Protector with up to SafeTITM-26262 ASIL-D Compliance
BQ79612-Q1, BQ79614-Q1, BQ79616-Q1
SLUSDS8 – SEPTEMBER 2019
www.ti.com
4 Description (continued)
Host communication to the BQ7961x-Q1 family of devices can be connected via the device's dedicated UART
interface or through a communication bridge device, BQ79600. Additionally, an isolated, differential daisy-chain
communication interface allows the host to communicate with the entire battery stack over a single interface. in
the event of a communication line break, the daisy-chain communication interface is configurable to a ring
architecture that allows the host to talk to devices at either end of the stack.
ADVANCE INFORMATION
2
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Product Folder Links: BQ79612-Q1 BQ79614-Q1 BQ79616-Q1
BQ79612-Q1, BQ79614-Q1, BQ79616-Q1
www.ti.com
SLUSDS8 – SEPTEMBER 2019
5 Device and Documentation Support
5.1 Related Links
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to order now.
Table 1. Related Links
PARTS
PRODUCT FOLDER
ORDER NOW
TECHNICAL
DOCUMENTS
TOOLS &
SOFTWARE
SUPPORT &
COMMUNITY
BQ79612-Q1
Click here
Click here
Click here
Click here
Click here
BQ79614-Q1
Click here
Click here
Click here
Click here
Click here
BQ79616-Q1
Click here
Click here
Click here
Click here
Click here
5.2 Receiving Notification of Documentation Updates
5.3 Support Resources
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight
from the experts. Search existing answers or ask your own question to get the quick design help you need.
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do
not necessarily reflect TI's views; see TI's Terms of Use.
5.4 Trademarks
SafeTI, E2E are trademarks of Texas Instruments.
5.5 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
5.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
6 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
Copyright © 2019, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: BQ79612-Q1 BQ79614-Q1 BQ79616-Q1
3
ADVANCE INFORMATION
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
PACKAGE OPTION ADDENDUM
www.ti.com
20-Dec-2019
PACKAGING INFORMATION
Orderable Device
Status
(1)
PBQ79616PAPTQ1
ACTIVE
Package Type Package Pins Package
Drawing
Qty
HTQFP
PAP
64
250
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
TBD
Call TI
Call TI
Op Temp (°C)
Device Marking
(4/5)
-40 to 125
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
Samples
IMPORTANT NOTICE AND DISCLAIMER
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AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable
standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you
permission to use these resources only for development of an application that uses the TI products described in the resource. Other
reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third
party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims,
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TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on
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Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2019, Texas Instruments Incorporated
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