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BQ75614-Q1

ACTIVE

Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance

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Data sheet

BQ75614-Q1

ACTIVE
Data sheet Order now

Product details

Number of series cells (min) 6 Vin (max) (V) 80 Features Cell balancing, Integrated ADC, Multi-cell support, Open-wire detection, Overtemperature protection, Overvoltage protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Undertemperature protection, Undervoltage protection Device type Cell monitor and balancer Number of series cells (max) 14 Operating temperature range (°C) -40 to 125 Rating Automotive Battery overvoltage protection (min) (V) 2.7 Battery overvoltage protection (max) (V) 4.5 TI functional safety category Functional Safety-Compliant Communication interface UART Operating current (typ) (µA) 9000
Number of series cells (min) 6 Vin (max) (V) 80 Features Cell balancing, Integrated ADC, Multi-cell support, Open-wire detection, Overtemperature protection, Overvoltage protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Undertemperature protection, Undervoltage protection Device type Cell monitor and balancer Number of series cells (max) 14 Operating temperature range (°C) -40 to 125 Rating Automotive Battery overvoltage protection (min) (V) 2.7 Battery overvoltage protection (max) (V) 4.5 TI functional safety category Functional Safety-Compliant Communication interface UART Operating current (typ) (µA) 9000
HTQFP (PAP) 64 144 mm² 12 x 12
  • 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
  • Functional Safety-Compliant
  • +/- 1.5mV ADC accuracy
  • Pin-package and software compatible device family:
    • Stackable monitor 16S (BQ79616-Q1, BQ79616H-Q1, BQ79656-Q1) , 14S (BQ79614-Q1, BQ79654-Q1), and 12S (BQ79612-Q1, BQ79652-Q1)
    • Standalone monitor 48 V system (BQ75614-Q1)
  • Supports current-sense measurement
  • Direct support on fuse and relay open and close diagnostics
  • Built-in redundancy path for voltage and temperature and current diagnostics
  • Highly accurate cell voltage measurements within 128 µs for all cell channels
  • Integrated post-ADC configurable digital low-pass filters
  • 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
  • 5 V LDO output to power external digital isolator
  • UART host interface
  • Built-in SPI master
  • 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
  • Functional Safety-Compliant
  • +/- 1.5mV ADC accuracy
  • Pin-package and software compatible device family:
    • Stackable monitor 16S (BQ79616-Q1, BQ79616H-Q1, BQ79656-Q1) , 14S (BQ79614-Q1, BQ79654-Q1), and 12S (BQ79612-Q1, BQ79652-Q1)
    • Standalone monitor 48 V system (BQ75614-Q1)
  • Supports current-sense measurement
  • Direct support on fuse and relay open and close diagnostics
  • Built-in redundancy path for voltage and temperature and current diagnostics
  • Highly accurate cell voltage measurements within 128 µs for all cell channels
  • Integrated post-ADC configurable digital low-pass filters
  • 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
  • 5 V LDO output to power external digital isolator
  • UART host interface
  • Built-in SPI master

The BQ75614-Q1 device provides high-accuracy cell voltage measurements up to 16S battery modules in less than 200 µs while these devices also support shunt-resistor current sense measurement. The integrated front-end filters enable the system to implement with simple, low voltage rated, differential RC filters on the cell input channels. The integrated, post-ADC, low-pass filters enable filtered, DC-like, voltage measurements. This device also supports integrated current sensing capabilities with option to synchronize with cell voltage measurements for better state of charge (SOC) calculation. The device supports autonomous internal cell balancing with temperature monitoring to auto-pause and resume balancing to avoid an overtemperature condition.

This device also includes eight GPIOs or auxiliary inputs that can be used for external thermistor measurements.

Host communication to the BQ75614-Q1 can be connected via the device’s dedicated UART interface.

All references to the BQ79616-Q1 device also apply to the BQ79616H-Q1 device.

The BQ75614-Q1 device provides high-accuracy cell voltage measurements up to 16S battery modules in less than 200 µs while these devices also support shunt-resistor current sense measurement. The integrated front-end filters enable the system to implement with simple, low voltage rated, differential RC filters on the cell input channels. The integrated, post-ADC, low-pass filters enable filtered, DC-like, voltage measurements. This device also supports integrated current sensing capabilities with option to synchronize with cell voltage measurements for better state of charge (SOC) calculation. The device supports autonomous internal cell balancing with temperature monitoring to auto-pause and resume balancing to avoid an overtemperature condition.

This device also includes eight GPIOs or auxiliary inputs that can be used for external thermistor measurements.

Host communication to the BQ75614-Q1 can be connected via the device’s dedicated UART interface.

All references to the BQ79616-Q1 device also apply to the BQ79616H-Q1 device.
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Same functionality with different pin-out to the compared device
BQ79616-Q1 ACTIVE 16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance Pin compatible with BQ75614-Q1. Same 64-pin QFP package without the current sensing feature.
BQ79656-Q1 ACTIVE Automotive 16-S precision battery monitors, balancer, current sensor with ASIL-D compliance Pin compatible with BQ75614-Q1. Same 64-pin QFP package without the sackable feature.

Technical documentation

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Type Title Date
* Data sheet BQ75614-Q1 14S or 16S Standalone Precision Automotive Battery Monitor, Balancer and Integrated Current Sense datasheet (Rev. B) PDF | HTML 30 Oct 2023
EVM User's guide BQ79616-Q1, BQ75614-Q1, BQ79656-Q1 Evaluation Modules User's Guide (Rev. C) PDF | HTML 30 Aug 2023
Application note BQ79616-Q1 Software Design Reference (Rev. B) PDF | HTML 21 Aug 2023
More literature BMS solutions for 48-V and 400-V/800-V EV/HEV batteries 14 Dec 2021
Technical article Save space, time and bill of materials with a smarter BMS for 48-V systems PDF | HTML 08 Sep 2021
User guide BQ79616-Q1 and BQ75614-Q1 Graphical User Interface (GUI) User's Guide 14 Dec 2020
Technical article Enhance thermal management in EVs with autonomous cell balancing PDF | HTML 09 Dec 2020
Technical article Conserve battery power in HEV/EVs with automatic host reverse wakeup PDF | HTML 04 Dec 2020
Functional safety information Functional Safety Considerations in Battery Management for Vehicles 17 Sep 2020
White paper 차량 전기화를 위한 배터리 관리시 기능적 안전성 고려 사항 17 Sep 2020
Functional safety information BQ75614-Q1 – The Highest Functional Safety Level and Performance for 48-V System 13 Sep 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ75614EVM-021 — Precision monitor with integrated hardware protector and current sense evaluation module

The BQ75614EVM is an evaluation module (EVM) for the BQ75614-Q1. The BQ75614-Q1 provides high-accuracy, cell voltage measurements for 6 to 14 battery cells. With the inclusion of an integrated current monitor ADC, the BQ75614-Q1 device is also able to provide highly accurate current sensing (...)
User guide: PDF | HTML
Not available on TI.com
Driver or library

BQ7X61X-Q1-DEVELOPMENT — BQ7x61x-Q1 development files

BQ7x61x-Q1 documentation repository
Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ75614-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616 — 16-S precision battery monitor, balancer and integrated protector with stacking interface BQ79616-Q1 — 16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79612-Q1 — Automotive 12-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79614-Q1 — Automotive 14-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79631-Q1 — Automotive high-voltage battery pack monitor with voltage, current and insulation resistance sensing
Request
Driver or library

BQ7X61X-Q1-EVALUATION — BQ7x61x-Q1 evaluation files

BQ7X61X-Q1 evaluation files repository
Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ75614-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616 — 16-S precision battery monitor, balancer and integrated protector with stacking interface BQ79616-Q1 — 16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616H-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79612-Q1 — Automotive 12-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79614-Q1 — Automotive 14-S precision battery monitor, balancer and integrated protector with ASIL-D compliance
Request
Driver or library

BQ7X61X-Q1-FMEDA — BQ7x61x-Q1 FMEDA files

BQ7x61x-Q1 FMEDA documentation repository
Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ75614-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616 — 16-S precision battery monitor, balancer and integrated protector with stacking interface BQ79616-Q1 — 16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616H-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79614-Q1 — Automotive 14-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79612-Q1 — Automotive 12-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79631-Q1 — Automotive high-voltage battery pack monitor with voltage, current and insulation resistance sensing
Request
Driver or library

BQ7X61X-Q1-FUNCTIONAL-SAFETY-DOCS — BQ7x61x-Q1 functional safety documents

BQ7X6X-Q1 functional safety documentation repository
Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ75614-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616-Q1 — 16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79614-Q1 — Automotive 14-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79612-Q1 — Automotive 12-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79616H-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79631-Q1 — Automotive high-voltage battery pack monitor with voltage, current and insulation resistance sensing
Request
Support software

SLVC810 — BQAutoEval GUI 1.0.4

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ75614-Q1 — Automotive 16-S precision battery monitor, balancer and integrated protector with ASIL-D compliance BQ79600-Q1 — Automotive SPI/UART communication interface functional-safety compliant with automatic host wakeup BQ79616-Q1 — 16-S automotive precision battery monitor, balancer and integrated protector with ASIL-D compliance
Hardware development
Evaluation board
BQ75614EVM-021 — Precision monitor with integrated hardware protector and current sense evaluation module BQ79616EVM-021 — BQ79616 evaluation module for 16-S precision battery monitor, balancer and integrated protector BQ79656EVM-021 — BQ79656-Q1 automotive 16-S precision battery monitor balancer integrated protector evaluation module
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