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

4 Summary

This application note presents a functional safety design approach for an electro-mechanical braking system based on TI's automotive-grade device portfolio, targeting ASIL D compliance. Starting from HARA-derived safety goals, the design implements multi-level safety mechanisms across power management, central control, communication, actuation, and sensor interface functional blocks. System-level ASIL D compliance is intended to be achieved through a combination of individually ASIL D certified devices, redundant hardware architecture, and ECU-level software cross-check strategies. This document aims to provide system integrators with a practical implementation reference for EMB development to help facilitate the certification process.