SFFSAY3 January   2026 F29H850TU , F29H859TU-Q1 , TMCS1123 , TMCS1123-Q1 , TPS650362-Q1 , TPS650365-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Background
    2. 1.2 HW/SW FuSa Analysis Process
      1. 1.2.1 Item Definition
      2. 1.2.2 Functional Safety Goal
      3. 1.2.3 Functional Safety Concept
      4. 1.2.4 Technical Safety Concept
      5. 1.2.5 HW/SW Safety Requirement
      6. 1.2.6 Dependent‑failure Analysis
    3. 1.3 TI Collaterals
      1. 1.3.1 TI Components Category
      2. 1.3.2 FuSa Collaterals for Safety MCU
  5. 2FuSa Concepts of OBC System
    1. 2.1 Item Definition
      1. 2.1.1 Item Functions
      2. 2.1.2 System Boundaries
      3. 2.1.3 External Interfaces
      4. 2.1.4 Operation Modes
    2. 2.2 Functional Safety Goal
    3. 2.3 Functional Safety Concept
    4. 2.4 Technical Safety Concept
    5. 2.5 HW/SW Safety Requirement
    6. 2.6 Dependent‑Failure Analysis
  6. 3FuSa Components of OBC System
    1. 3.1 Components Overview
    2. 3.2 Microcontroller
      1. 3.2.1 CPU
      2. 3.2.2 ADC Sample
      3. 3.2.3 PWM Generation
      4. 3.2.4 CMPSS
      5. 3.2.5 Data Transmission
      6. 3.2.6 Fault Signal Monitor and Safe State Control
    3. 3.3 Power Management IC
      1. 3.3.1 MCU Monitor
      2. 3.3.2 Shutdown Sequence
      3. 3.3.3 Power Supply
    4. 3.4 System Basis Chips
      1. 3.4.1 CAN Communication
      2. 3.4.2 Supply Voltage Rail Monitoring
      3. 3.4.3 SPI/Processor Communication
      4. 3.4.4 Device Internal EEPROM
    5. 3.5 Power Supply and Supervisor
    6. 3.6 Gate Driver
    7. 3.7 Voltage Sensor
    8. 3.8 Current Sensor
    9. 3.9 Temperature Sensor
  7. 4Summary
  8. 5References

1.3.1 TI Components Category

Although the system integrator is ultimately responsible for carrying out the system‑level functional‑safety analysis and compliance process, selecting the appropriate components is essential to succeed. Texas Instruments simplifies this task by organizing the offerings into clear functional‑safety categories.

As shown in Figure 1-3, TI parts are classified as FunctionalS afety‑Capable, Functional Safety Quality‑Managed, or FunctionalS afety‑Compliant, making it easier for engineers to identify the right products for safety‑critical designs.

  • Functional Safety-Capable Products:

    • Simpler ICs that are developed using TI's standard quality-managed development flow.
    • Safety functions such as internal monitoring and diagnostics are not always integrated.
    • TI provides FuSa FIT rates calculation, FMD and Pin FMA.

  • Functional Safety Quality-Managed Products:

    • Complex products that have internal diagnostic features.
    • Developed using TI's standard quality-managed development flow.
    • Extensive set of documentation: FMEDA analysis, FuSa manual.

  • Functional Safety-Compliant Products:

    • The most complex products that can be systems in their own right.
    • Developed according to the certified FuSa development flow prescribed in ISO 26262: 2018.
    • Further extensive documentation: Fault-tree analysis, FuSa product certificate.
TI's Categories for Products in FuSa DesignFigure 1-3 TI's Categories for Products in FuSa Design

** May only be available for analog power and signal chain products.

*** Available for select products.

The functional‑safety manual [3] describes the safety functions and shows how external components can be employed to obtain the required fault‑coverage and diagnostic capabilities. TI’s standard quality‑managed development flow, also mentioned above, is the company’s process for handling both systematic and random faults. More detailed description of this process is shown in [3].