3 to 6 series cell lithium-ion battery monitor and secondary protection for automotive battery packs

BQ76PL536A-Q1

ACTIVE

Product details

Number of series cells (Min) 3 Vin (Max) (V) 27 Features Cell balancing Number of series cells (Max) 6 Rating Automotive
Number of series cells (Min) 3 Vin (Max) (V) 27 Features Cell balancing Number of series cells (Max) 6 Rating Automotive
HTQFP (PAP) 64 100 mm² 10 x 10
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 2: –40°C to +105°C Ambient Operating Temperature Range
    • Device HBM Classification Level 2
    • Device CDM Classification Level C4B
  • 3-to-6 Series Cell Support, All Chemistries
  • Hot-Pluggable
  • High-Speed Serial Peripheral Interface (SPI) for Data Communications
  • Stackable Vertical Interface
  • Isolation Components Not Required Between Devices
  • High-Accuracy Analog-to-Digital Converter (ADC):
    • ±1 mV Typical Accuracy
    • 14-Bit Resolution, 6-µs Conversion Time
    • Nine ADC Inputs
    • Dedicated Pins for Synchronizing Measurements
  • Configuration Data Stored in Error Check/Correct (ECC)-One-Time-Programmable (OTP) Registers
  • Built-In Comparators (Secondary Protector) for:
    • Overvoltage and Undervoltage Protection
    • Overtemperature Protection
    • Programmable Thresholds and Delay Times
    • Dedicated Fault Signals
  • Cell Balancing Control Outputs With Safety Timeout
    • Balance Current Set by External Components
  • Supply Voltage Range from 7.2 V to 27 V Continuous and 36-V Peak
  • Low Power:
    • Typical 12-µA Sleep, 45-µA Idle
  • Integrated Precision 5-V, 3-mA LDO
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 2: –40°C to +105°C Ambient Operating Temperature Range
    • Device HBM Classification Level 2
    • Device CDM Classification Level C4B
  • 3-to-6 Series Cell Support, All Chemistries
  • Hot-Pluggable
  • High-Speed Serial Peripheral Interface (SPI) for Data Communications
  • Stackable Vertical Interface
  • Isolation Components Not Required Between Devices
  • High-Accuracy Analog-to-Digital Converter (ADC):
    • ±1 mV Typical Accuracy
    • 14-Bit Resolution, 6-µs Conversion Time
    • Nine ADC Inputs
    • Dedicated Pins for Synchronizing Measurements
  • Configuration Data Stored in Error Check/Correct (ECC)-One-Time-Programmable (OTP) Registers
  • Built-In Comparators (Secondary Protector) for:
    • Overvoltage and Undervoltage Protection
    • Overtemperature Protection
    • Programmable Thresholds and Delay Times
    • Dedicated Fault Signals
  • Cell Balancing Control Outputs With Safety Timeout
    • Balance Current Set by External Components
  • Supply Voltage Range from 7.2 V to 27 V Continuous and 36-V Peak
  • Low Power:
    • Typical 12-µA Sleep, 45-µA Idle
  • Integrated Precision 5-V, 3-mA LDO

The bq76PL536A-Q1 device is a stackable battery monitor and protector for three-to-six lithium-ion cells in series. The bq76PL536A-Q1 integrates an analog front end (AFE) along with a precision analog-to-digital converter (ADC), used to precisely measure battery cell voltages. A separate ADC is used to measure temperature.

In addition to temperature measurement, overvoltage and undervoltage are monitored per channel for protection. Non-volatile memory stores the user-programmable protection thresholds and delay times. A FAULT output signals whenever one of these thresholds is exceeded.

Cell stacks of 192 cells can be supported by stacked bq76PL536A-Q1 devices. A high-speed SPI interface connects all devices.

The bq76PL536A-Q1 device is a stackable battery monitor and protector for three-to-six lithium-ion cells in series. The bq76PL536A-Q1 integrates an analog front end (AFE) along with a precision analog-to-digital converter (ADC), used to precisely measure battery cell voltages. A separate ADC is used to measure temperature.

In addition to temperature measurement, overvoltage and undervoltage are monitored per channel for protection. Non-volatile memory stores the user-programmable protection thresholds and delay times. A FAULT output signals whenever one of these thresholds is exceeded.

Cell stacks of 192 cells can be supported by stacked bq76PL536A-Q1 devices. A high-speed SPI interface connects all devices.

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Technical documentation

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Type Title Date
* Data sheet bq76PL536A-Q1 3-to-6 Series Cell Lithium-Ion Battery Monitor and Secondary Protection IC for EV and HEV Applications datasheet (Rev. A) 12 Dec 2016
Technical article How active and passive cell balancing works 05 Oct 2016
Application note Designing EMI/EMC Safe Battery Pack 14 Jun 2016
Technical article How batteries may make travel on Mars easier 27 Jan 2016
User guide bq76PL536A and bq76PL536A-Q1 EVM Quick Start Guide (Rev. D) 28 Jul 2015
Application note bq76PL536/536A/536AQ1 Communication Basics (Rev. B) 05 Jul 2011
Application note Multi-Cell Li-Ion Battery Management System Using MSP430F5529 and bq76PL536 16 Dec 2010
Application note Improving Communications With the bq76PL536 11 Aug 2010

Design & development

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

Evaluation board

BQ76PL536EVM-3 — Evaluation Module for Lithium-Ion Battery Monitor and Secondary Protection IC

BQ76PL536EVM-3, Evaluation Module for the BQ76PL536A/bq76PL536A-Q1 Lithium-Ion Battery Monitor and Secondary Protection IC. The User’s Guide document covers the initial connection and installation of the Texas Instruments bq76PL536A/bq76PL536A-Q1 Evaluation Module (EVM), supplied in kit form (...)

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Support software

BQ76PL536EVM-3-SW — BQ76PL536EVM-3 Software

The BQ76PL536EVM-3 tool interfaces with the bq76PL536EVM-3 evaluation board
Support software

BQ76PL536EVM-3 Software (Rev. B)

SLUC240B.ZIP (1084 KB)
Reference designs

TIDA-00821 — Reference Design for 6-Cell HEV/EV Integrated Battery Monitor and Protector w/Passive Balancing

The TIDA-00821 reference design is a stackable monitor and protector for use in large format Lithium-ion batteries that provides monitoring, balancing, and communications. Each bq76PL536A-Q1 EVM can manage 3 to 6 cells  for Li-ion battery applications. Up to 32 bq76PL536A-Q1 EVM modules can be (...)
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HTQFP (PAP) 64 View options

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