Product details


Number of series cells (Min) 6 Vin (Max) (V) 79.2 Features Cell balancing Number of series cells (Max) 16 Operating temperature range (C) -40 to 85 Rating Catalog 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


  • 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
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The bq76PL455A device is an integrated 16-cell battery monitoring and protection device, designed for high-reliability, high-voltage industrial applications. The integrated high-speed, differential, capacitor-isolated communications interface allows up to sixteen bq76PL455A devices to communicate with a host through a single high-speed Universal Asynchronous Receiver/Transmitter (UART) interface.

The bq76PL455A 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 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

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Type Title Date
* Data sheet bq76PL455A 16-Cell Industrial Integrated Battery Monitor with Passive Cell Balancing datasheet (Rev. A) Oct. 06, 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 article How active and passive cell balancing works Oct. 05, 2016
Application note Designing EMI/EMC Safe Battery Pack Jun. 14, 2016
Application note bq76PL455A-Q1 Software Design Reference (Rev. A) May 11, 2015

Design & development

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Hardware development

document-generic User guide

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 (...)

  • 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

Software development

SLUC270A.ZIP (4340 KB)

CAD/CAE symbols

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