SFFS422 May   2022

 

  1.   Trademarks
  2.   2
  3. 1Scope
  4. 2Related Documents
  5. 3Related Standards and Acronyms
  6. 4Concept Overview
    1. 4.1 System Block Diagram
    2. 4.2 System Specifications
    3. 4.3 Conditions of use: Assumptions
      1. 4.3.1 Generic Assumptions
      2. 4.3.2 Specific Assumptions
    4. 4.4 Safe Torque Off Implementation
      1. 4.4.1 Subsystem Elements
      2. 4.4.2 STO Safe Subsystem States and Timing Diagram
      3. 4.4.3 STO_1 Subsystem
      4. 4.4.4 STO_2 Subsystem
      5. 4.4.5 MCU (SIL 1) Diagnostic Coverage
      6. 4.4.6 STO_FB Subsystem
      7. 4.4.7 Information on ICs
        1. 4.4.7.1 Isolated 24-V Input Receiver
        2. 4.4.7.2 Load Switch: TPS22919
        3. 4.4.7.3 High-Side Switch: TPS27S100
        4. 4.4.7.4 Isolated Gate Driver: ISO5852S (ISO5452)
    5. 4.5 Safe State
  7. 5Concept FMEA
    1. 5.1 System FMEA
  8. 6References

4.4.7.2 Load Switch: TPS22919

GUID-95EC9AD7-69E9-4F86-95C5-730677B73E02-low.gif Figure 4-9 TPS22919 Block Diagram

Table 4-5 describes the connection of the VOUT pin depending on the state of the ON pin as well as the various QOD pin configurations.

Table 4-5 TPS22919 Functional Modes vs QOD
On QOD Configuration TPS22919 VOUT
L QOD pin connected to VOUT with RQOD GND (RPD, QOD + RQOD)
L QOD pin tied to VOUT directly GND (RPD, QOD)
L QOD pin left open Floating
H N/A VIN