SFFS757 February   2024 DLP4620S-Q1 , DLPC231S-Q1

 

  1.   1
  2. 1Introduction
    1.     Trademarks
  3. 2 DLP4620S-Q1 Chipset Functional Safety Capability
  4. 3Development Process for Management of Systematic Faults
    1. 3.1 TI New-Product Development Process
    2. 3.2 TI Functional Safety Development Process
  5. 4 DLP4620S-Q1 Chipset Overview
    1. 4.1 Targeted Applications
    2. 4.2 DLP4620S-Q1 Chipset Functional Safety Concept
      1. 4.2.1 Typical Hazards
      2. 4.2.2 Chipset Architecture
      3. 4.2.3 Built-In Self Tests
    3. 4.3 Functional Safety Constraints and Assumptions
  6. 5Description of Hardware Component Parts
    1. 5.1 Description of System Level Built In Self Test (BISTs)
  7. 6Management of Random Faults
    1. 6.1 Fault Reporting
      1. 6.1.1 HOST_IRQ
      2. 6.1.2 Error History
      3. 6.1.3 Fault Handling
    2. 6.2 Functional Safety Mechanism Categories
    3. 6.3 Description of Functional Safety Mechanisms
      1. 6.3.1 Video Path Protection
        1. 6.3.1.1 Video Input BISTs
        2. 6.3.1.2 Video Processing BISTs
        3. 6.3.1.3 Video Output BISTs
      2. 6.3.2 Illumination Control Protection
        1. 6.3.2.1 Communication Interface and Register Protection
        2. 6.3.2.2 LED Control Feedback Loop Protection
        3. 6.3.2.3 Data Load and Transfer Protection
        4. 6.3.2.4 Watchdogs and Clock Monitors
        5. 6.3.2.5 Voltage Monitors
  8.   A Summary of Recommended Functional Safety Mechanism Usage
  9.   B Distributed Developments
    1.     B.1 How the Functional Safety Lifecycle Applies to TI Functional Safety Products
    2.     B.2 Activities Performed by Texas Instruments
    3.     B.3 Information Provided
  10.   C Revision History

1 Introduction

This document is a functional safety manual for the Texas Instruments DLP4620S-Q1 chipset. The specific orderable part numbers supported by this functional safety manual are as follows:

  • DLP4620S-Q1 (Orderable Part #: DLP4620SAFQXQ1)
  • DLPC231S-Q1 (Orderable Part #: DLPC231STZDQQ1)
  • TPS99000S-Q1 (Orderable Part #: TPS990STPZPQ1, TPS990STPZPRQ1)

This functional safety manual provides information needed by system developers to help in the creation of a functional safety system using the DLP4620S-Q1 chipset. This document includes:

  • An overview of the chipset architecture
  • An overview of the development process used to decrease the probability of systematic failures
  • An overview of the functional safety architecture for management of random failures
  • The details of architecture partitions and implemented functional safety mechanisms

The following information is documented in the DLP4620S-Q1 Functional Safety Analysis Report and is not repeated in this document:

  • Summary of failure rates (FIT) of the component.
  • Summary of functional safety metrics of the hardware components for targeted standards (for example IEC 61508, ISO 26262, and so forth).
  • Quantitative functional safety analysis (also known as FMEDA, Failure Modes, Effects, and Diagnostics Analysis) with detail of the different parts of the chipset, allowing for customized application of functional safety mechanisms. For the DLP4620S-Q1 chipset, TI will provide a total of three FMEDAs, one for each component of the chipset.
  • Assumptions used in the calculation of functional safety metrics.

The user of this document should have a general familiarity with the DLP4620S-Q1 chipset. For more information, refer to the DLP4620S-Q1 data sheet. This document is intended to be used in conjunction with the pertinent data sheets, technical reference manuals, and other chipset documentation.

For information that is beyond the scope of the listed deliverables, contact your TI sales representative or go to http://www.ti.com/technologies/functional-safety/overview.html.