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BQ79600-Q1

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Automotive SPI/UART communication interface functional-safety compliant with automatic host wakeup

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Data sheet

BQ79600-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Features Separate MCU requirement, Stackable (built-in interface) Communication interface Daisy chain, SPI, UART Device type Communication device Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Compliant Operating current (typ) (µA) 2500
Rating Automotive Features Separate MCU requirement, Stackable (built-in interface) Communication interface Daisy chain, SPI, UART Device type Communication device Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Compliant Operating current (typ) (µA) 2500
TSSOP (PW) 16 32 mm² (5 mm × 6.4 mm)
  • 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
  • Automatic wake up of BMS/BMU system when fault is detected in ring architecture
  • Support supply from 4.75-V to 40-V
  • UART/SPI Host interface
  • Compatible with 3.3-V/5-V logic
  • Isolated differential daisy chain
    • Support ring architecture with one device
    • Support transformer/ capacitor isolation
  • Designed for BCI/EMI/EMC robustness
  • Supports BQ7961X-Q1 family, BQ7965X, BQ7963X and future products
  • 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
  • Automatic wake up of BMS/BMU system when fault is detected in ring architecture
  • Support supply from 4.75-V to 40-V
  • UART/SPI Host interface
  • Compatible with 3.3-V/5-V logic
  • Isolated differential daisy chain
    • Support ring architecture with one device
    • Support transformer/ capacitor isolation
  • Designed for BCI/EMI/EMC robustness
  • Supports BQ7961X-Q1 family, BQ7965X, BQ7963X and future products

The BQ79600-Q1 is a communication (bridge) IC designed to interface between a microcontroller (MCU) and TI battery monitoring ICs, for example the BQ7961X-Q1. The information from the MCU is translated by the device to signals recognized by TI’s battery management daisy chain protocol, and transmitted out. And signals from daisy chain are decoded to bit stream and then sent back to MCU.

When the MCU and PMIC are in SHUTDOWN/ SLEEP, the BQ79600-Q1 can wake them up if any unmasked fault is detected when using ring architecture.

The BQ79600-Q1 is a communication (bridge) IC designed to interface between a microcontroller (MCU) and TI battery monitoring ICs, for example the BQ7961X-Q1. The information from the MCU is translated by the device to signals recognized by TI’s battery management daisy chain protocol, and transmitted out. And signals from daisy chain are decoded to bit stream and then sent back to MCU.

When the MCU and PMIC are in SHUTDOWN/ SLEEP, the BQ79600-Q1 can wake them up if any unmasked fault is detected when using ring architecture.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet BQ79600-Q1 Automotive SPI/UART Communication Interface with Functional Safety datasheet (Rev. A) Jun 1, 2020
User guide BQ79600 Bring Up Procedure (Rev. C) PDF | HTML Jan 29, 2026
User guide BQ7961x-Q1 Design Recommendations for High Voltage Automotive BMS (Rev. B) PDF | HTML Jun 18, 2025
Application note BQ79600-Q1 Design Recommendations (Rev. A) PDF | HTML Oct 31, 2023
Application note BQ79616-Q1 Daisy Chain Communications PDF | HTML Oct 26, 2023
Application brief Scaling accurate battery management designs across energy storage systems PDF | HTML Oct 20, 2023
Application note BQ79600-Q1 Software Design Reference (Rev. A) PDF | HTML Oct 17, 2023
White paper Wired vs. Wireless Communications In EV Battery Management (Rev. A) PDF | HTML Jun 6, 2023
User guide BQ79616-Q1 and BQ75614-Q1 Graphical User Interface (GUI) User's Guide Dec 14, 2020
Technical article Enhance thermal management in EVs with autonomous cell balancing PDF | HTML Dec 9, 2020
Technical article Conserve battery power in HEV/EVs with automatic host reverse wakeup PDF | HTML Dec 4, 2020
Functional safety information Functional Safety Considerations in Battery Management for Vehicles Sep 17, 2020

Design & development

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

Evaluation board

BQ79600EVM — Functional Safety-Compliant SPI/UART to daisy chain bridge interface with automatic host wake-up

The BQ79600EVM is an evaluation module (EVM) for the BQ79600-Q1 device used as bridge IC to interface between a microcontroller (MCU) and the TI battery monitoring ICs (for example, BQ7961X-Q1 and BQ79606A-Q1). The information from the MCU is translated by the device to pulses recognized by TI's (...)
User guide: PDF | HTML
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Support software

SLVC810 — BQAutoEval GUI 1.0.4

Supported products & hardware
Reference design

TIDA-010253 — Battery control unit reference design for energy storage systems

This reference design is a central controller for a high-voltage Lithium-ion (Li-ion), lithium iron phosphate (LiFePO4) battery rack. This design provides driving circuits for high-voltage relay, communication interfaces, (including RS-485, controller area network (CAN), daisy chain, and Ethernet), (...)

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TSSOP (PW) 16 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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