SLVA528D September   2012  – August 2021 TPS65381-Q1 , TPS65381A-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Product Overview
    1. 2.1 Safety Functions and Diagnostics Overview
    2. 2.2 Target Applications
    3. 2.3 Product Safety Constraints
  4. 3Development Process for Management of Systematic Faults
    1. 3.1 TI New-Product Development Process
  5. 4TPS65381x-Q1 Product Architecture for Management of Random Faults
    1. 4.1 Device Operating States
    2.     Device Operating States (continued)
    3. 4.2 NRES (MCU Reset) Driver and ENDRV (SAFING Path Enable) Driver
  6. 5TPS65381x-Q1 Architecture Safety Mechanisms and Assumptions of Use
    1. 5.1 Power Supply
    2. 5.2 Regulated Supplies
      1. 5.2.1 VDD6 Buck Switch-Mode Supply
      2. 5.2.2 VDD5 Linear Supply
      3. 5.2.3 VDD3/5 Linear Supply
      4. 5.2.4 VDD1 Linear Supply
      5. 5.2.5 VSOUT1 Linear Supply
      6. 5.2.6 Charge Pump
    3. 5.3 Diagnostic, Monitoring, and Protection Functions
      1. 5.3.1 External MCU Fault Detection and Management
        1. 5.3.1.1 External MCU Error Signal Monitor (MCU ESM)
        2. 5.3.1.2 Watchdog Timer
      2. 5.3.2 Voltage Monitor (VMON)
      3. 5.3.3 Loss-of-Clock Monitor (LCMON)
      4. 5.3.4 Junction Temperature Monitoring and Current Limiting
      5. 5.3.5 Analog and Digital MUX (AMUX and DMUX) and Diagnostic Output Pin (DIAG_OUT)
      6. 5.3.6 Analog Built-In Self-Test (ABIST)
      7. 5.3.7 Logic Built-In Self-Test (LBIST)
      8. 5.3.8 Device Configuration Register Protection
  7. 6Application Diagrams
    1. 6.1 TPS65381x-Q1 With TMS570
    2. 6.2 TPS65381x-Q1 With C2000
    3. 6.3 TPS65381x-Q1 With TMS470
  8. 7TPS65381x-Q1 as Safety Element out of Context (SEooC)
    1. 7.1 TPS65381x-Q1 Used in an EV/HEV Inverter System
    2. 7.2 SPI Note
  9. 8Revision History

6.2 TPS65381x-Q1 With C2000

Optional implementations that may be necessary depending on the specific C2000™ device used and specific system requirements. Please see detailed information on the specific C2000™ device.
Different C2000™ MCU devices have specific power supply requirements for the core supply, VDD. Different devices may generate their own core supply internally, use the core supply from the TPS65381x-Q1 PMIC, or use an external regulator.
Depending on the specific C2000™ MCU and the core rail generation, voltage monitoring may be provided within the PMIC or an external voltage monitor may be needed.
Depending on the specific C2000™ MCU and the IO supply requirements, voltage monitoring may be provided within the PMIC or an external voltage monitor may be needed.
The ERROR/WDI pin can be configured as an input for the MCU ESM or the watchdog in trigger mode. The assumed use case with the C2000™ is this pin is used as the ERROR input to the MCU ESM monitoring the C2000™ ERRORSTS pin output and the watchdog is in Question and Answer mode.
An external resistor must be added to pull the ERRORSTS pin to its ERROR level by default. The polarity of the ERRORSTS pin varies depending on the C2000 device being used, consult the device data manual for more information. An inverter must be used in cases where the polarity of the ERRORSTS pin differs from that of the ERROR/WDI pin while in the MCU ESM function. The polarity of either pin is not programmable.
Figure 6-2 TPS65381x-Q1 with C2000™