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16-cell battery monitor with passive cell balancing

BQ76PL455A-Q1

ACTIVE

Product details

Parameters

Number of series cells (Min) 6 Features Cell balancing Vin (Max) (V) 79.2 Number of series cells (Max) 16 Operating temperature range (C) -40 to 105 Rating Automotive open-in-new Find other Battery monitors & balancers

Package | Pins | Size

TQFP (PFC) 80 144 mm² 12 x 12 open-in-new Find other Battery monitors & balancers

Features

  • 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
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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).

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet bq76PL455A-Q1 16-Cell EV/HEV Integrated Battery Monitor and Protector datasheet (Rev. C) Nov. 03, 2016
Application note bq76PL455A-Q1 Design Recommendations (Rev. A) Oct. 04, 2018
User guide EM1402 Evaluation Module Feb. 01, 2017
Application note bq76PL455A-Q1 Use Case Scenarios Jan. 05, 2017
Technical articles How active and passive cell balancing works Oct. 05, 2016
Application note Designing EMI/EMC Safe Battery Pack Jun. 14, 2016
Technical articles How batteries may make travel on Mars easier Jan. 27, 2016
Technical articles From millivolts to miles: How the performance of battery-management ICs affects your car’s performance Dec. 10, 2015
Application note Getting Started with the bq76PL455A-Q1 Example Code Sep. 22, 2015
User guide bq76PL455EVM and GUI User's Guide (Rev. A) Jul. 28, 2015
Application note bq76PL455A-Q1 Software Design Reference (Rev. A) May 11, 2015

Design & development

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

Hardware development

EVALUATION BOARD Download
249
Description

The bq76PL455A-Q1 is a highly integrated automotive Li-ion battery management solution that measures the voltages of up to 16 cells connected in series as part of a larger battery stack and reports them via a high speed differential communications link. It provides passive cell balancing outputs (...)

Features
  • 6 to 16 cell monitor and passive balance
  • High accuracy voltage sensing
  • 8 AUX inputs for temperature and other 0 to 5V sensors
  • Isolated daisy-chain communications with excellent EMC/EMI performance and BCI tolerance
  • Designed for robust hot-plug performance
EVALUATION BOARD Download
2499
Description
16-Cell EV/HEV High Current Active Balance Solution, using the latest automotive battery management monitor and protector, the bq76PL455A-Q1. It provides high-performance battery management solution for large capacity battery packs, by combining the high integration and accuracy of the bq76PL455A-Q1 (...)
Features
  • Highly accurate monitoring of 16 li-ion cells
  • Integrated protector
  • 3 - 5A active balance
  • Fully isolated transfer to external 12V supply/battery
  • 1-Mb/s stackable isolated differential-UART

Software development

CODE EXAMPLE OR DEMO Download
SLUC270A.ZIP (4340 KB)
GUI FOR EVALUATION MODULE (EVM) Download
SLUC584A.ZIP (7551 KB)

Reference designs

REFERENCE DESIGNS Download
High Performance MCU for an HEV/EV Battery Management System Reference Design
TIDM-TMS570BMS — A system example for an active cell balancing battery management system. The TMS570LS0432 microcontroller commands EMB1402 EVM to monitor the battery cells and perform charge/discharge from one battery cell to an external 12V supply. The user can view the cell status and control cell balancing from (...)
document-generic Schematic
REFERENCE DESIGNS Download
Battery Pack Controller Communications Bridge Reference Design
TIDA-01400 — The Bridge BoosterPack demonstrates the bq76PL455A-Q1 configured as a dedicated communications bridge to translate MCU UART  communications to the bq76PL455A-Q1 daisy chain. The bq76PL455 Bridge BoosterPack also offers  an isolated current sense input for measuring battery pack current, as (...)
document-generic Schematic
REFERENCE DESIGNS Download
16-Channel Active Cell Balance Reference Design
TIDA-00817 — 16-Cell EV/HEV High Current Active Balance Solution, using the latest automotive battery management monitor and protector, the bq76PL455A-Q1. It provides high-performance battery management solution for large capacity battery packs, by combining the high integration and accuracy of the bq76PL455A-Q1 (...)
document-generic Schematic
REFERENCE DESIGNS Download

CAD/CAE symbols

Package Pins Download
TQFP (PFC) 80 View options

Ordering & quality

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  • Ongoing reliability monitoring

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