SDAA524 October   2026 DRV3233-Q1 , DRV3263-Q1 , DRV8245-Q1 , LM74930-Q1 , TCAN1043HG-Q1 , TMAG6180-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Evolution of Braking Systems
      1. 1.1.1 Legacy Hydraulic Brake
      2. 1.1.2 Electrical Hydraulic Brake (EHB)
      3. 1.1.3 Electrical Mechanical Brake (EMB)
    2. 1.2 Why ASIL D is Required for EMB
    3. 1.3 How to Develop a Safe EMB System?
  5. 2Safety Goal and Safety Concept
    1. 2.1 EMB System Overview
      1. 2.1.1 Item Definition
      2. 2.1.2 Operational Situations
      3. 2.1.3 System Interface
    2. 2.2 EMB Safety Goal
      1. 2.2.1 Application Assumption
      2. 2.2.2 Hazard Analysis and Risk Assessment
      3. 2.2.3 Safety Goal
    3. 2.3 EMB Functional Safety Concept
      1. 2.3.1 Fail Tolerance Strategy
      2. 2.3.2 Functional Safety Concept
      3. 2.3.3 Functional Safety Requirements
  6. 3Proposed Design for ASIL D EMB
    1. 3.1 EMB System Safety Design Architecture
    2. 3.2 Hardware Component
    3. 3.3 Safety Mechanism Design
      1. 3.3.1 Power Management Safety Design
        1. 3.3.1.1 Ideal Diode Safety Analysis
        2. 3.3.1.2 DCDC safety analysis
        3. 3.3.1.3 PMIC Safety Analysis
      2. 3.3.2 Central Controller Safety Design
      3. 3.3.3 Communication Interface Safety Design
      4. 3.3.4 Actuator Safety Design
        1. 3.3.4.1 Braking Motor Driver Safety Analysis
        2. 3.3.4.2 Parking Driver Safety Analysis
      5. 3.3.5 Sensor Interface Safety Design
        1. 3.3.5.1 Position Sensor Safety Analysis
        2. 3.3.5.2 Wheel Speed Decoder Safety Analysis
        3. 3.3.5.3 Pedal Position Sensor Safety Analysis
  7. 4Summary
  8. 5References

3.2 Hardware Component

The following device information are collected from TI.com. Detailed resources can be referred from chip datasheet, safety manual, or other reference documents.

  • LM74930-Q1: The LM74930-Q1 is an ideal diode controller that drives and controls external back-to-back N-Channel MOSFETs to emulate an ideal diode rectifier and power path. The LM74930-Q1 provides ON and OFF control over overcurrent and overvoltage protection. The controller can withstand high voltage transients due to its common source topology, and the wide input supply from 4V to 70V allows for the protection and control of 12V, 24V, and 48V automotive battery-powered ECUs.
  • LM78845-Q1: The LM78845-Q1 is an 80V synchronous buck converter with hardware capability up to ASIL-D. This device supports high 80V rail current up to 4.5A output. The LM78845-Q1 is specifically intended for functional safety-relevant applications. The LM78845-Q1 integrates input/output voltage monitoring, current-limiting, thermal shutdown, redundant bandgap monitoring, redundant output voltage monitoring, redundant temperature sensor, and start-up diagnostics to support ASIL-D random and systematic capability, optimized for 48V battery-powered systems.
  • TPS653880-Q1: The TPS653880-Q1 is a multi-rail power supply device designed for microcontrollers, sensors, transceivers, and peripherals in safety-relevant applications. This device is equipped with overvoltage, undervoltage, overcurrent protection, soft-start, output-load detection, and watchdog monitoring. Furthermore, the TPS653880-Q1 complies with ISO 26262 and is practical for ASIL D applications.
  • F29P329SM2-Q1: The F29329SM2-Q1 is a high-performance C2000™ real-time microcontroller designed for automotive and industrial use. The F29329SM2-Q1 utilizes a common safety architecture implemented for multiple products. The F29329SM2-Q1 features a fixed-loop CPU running at 200MHz, 2MB of Flash, and 260KB of RAM, supporting 18 channels of PWM output and various ADCs. The device meets ISO 26262 and IEC61508 standards, providing compliance with safety requirements up to ASIL D/SIL3. With advanced functionalities and extensive connectivity, the F29329SM2-Q1 offers a comprehensive platform for EMB applications
  • TCAN1043HG-Q1: The TCAN1043HG-Q1 meets the specifications of the ISO 11898-2 (2016) High Speed controller area network (CAN) physical layer standard. This device provides CAN transceiver differential transmit capability to the bus and differential receive capability from the bus. The TCAN1043HG-Q1 includes multiple protection features to provide CAN bus robustness.
  • DRV3263-Q1: The DRV3263-Q1 is an integrated smart gate driver for 48V automotive three-phase BLDC motors with support up to ASIL D. The device provides three half-bridge gate drivers, each capable of driving high-side and low-side N-channel MOSFETs to drive a 3-phase brake motor. A wide range of diagnostics and protection features are integrated into the DRV3263-Q1 to enable a robust motor drive system design and eliminate the need for external components.
  • DRV3233-Q1: The DRV3233-Q1 is an integrated smart gate driver for 12V and 24V automotive three-phase BLDC motors with support up to ASIL D. The device provides three half-bridge gate drivers, each capable of driving high-side and low-side N-channel power MOSFETs to drive a 3-phase brake motor. Integrated diagnostics and protection features enable a robust motor drive system design and eliminate external component requirements.
  • DRV8263S-Q1: The DRV8263S-Q1 is a wide-voltage, highly integrated H-bridge brushed driver for 24V and 48V automotive applications. The device offers voltage monitoring and load diagnostics, as well as protection against overcurrent and overtemperature, targeting ASIL B/ASIL D parking lock applications.
  • DRV8245-Q1: The DRV8245-Q1 is a wide-voltage, highly integrated H-bridge brushed driver for 12V automotive applications. The device offers voltage monitoring and load diagnostics, along with protection against overcurrent and overtemperature, targeting ASIL B/ASIL D parking lock applications.
  • WSS001-Q1: The WSS001-Q1 is a single-channel, ASIL B-targeted wheel-speed sensor interface IC designed for harsh automotive environments. The device supports five decoding modes for 2-Level and 3-Level AK protocol sensors, outputs speed signals through WSS0, and provides decoded results through SPI registers.
  • TMAG6180-Q1: The TMAG6180-Q1 is an ASIL B AMR-based high-precision angle sensor with integrated signal conditioning. The device provides differential sine/cosine analog outputs and dual Hall sensor outputs (X/Y axes) for full 360° angle measurement.