SLUUCC4A October   2020  – September 2021 TPS92520-Q1

 

  1.   Trademarks
  2.   General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines
  3. 1Description
    1. 1.1 Typical Applications
    2. 1.2 Warnings
    3. 1.3 Connector Description
  4. 2Performance Specifications
  5. 3Performance Data and Typical Characteristic Curves
    1. 3.1 1.5A CC BUCK SW-Node Voltage Waveform
    2. 3.2 Start-up Waveforms
    3. 3.3 PWM Dimming
  6. 4Schematic, PCB Layout, and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Layout
    3. 4.3 Bill of Materials
  7. 5Software
    1. 5.1 Demonstration Kit Software Installation for LEDMCUEVM-132 Board
      1. 5.1.1 Installation Overview
    2. 5.2 Step-by-Step Installation Instructions
    3. 5.3 Installation Error Recovery
    4. 5.4 Checking for Updates
  8. 6TPS92520EVM-133 Power Up and Operation
    1. 6.1 Power Up and Operation at VINx < 40 V
    2. 6.2 MCU Control Window
    3. 6.3 SPI Command Window
    4. 6.4 Watchdog Window
    5. 6.5 GUI Devices Window
      1. 6.5.1 Channel 1 or 2 Sub-Window: Settings, Measurements, and Faults
      2. 6.5.2 Device Sub-Window: Shared Device Settings, Measurements, Register Info, and Limp Home
    6. 6.6 Limp Home Mode Window
  9. 7Revision History

6.4 Watchdog Window

The Watchdog window allows you select either no watchdog timer or a watchdog timer along with the available timer lengths, which is by default 1.67 seconds.

GUID-20200811-CA0I-CB2H-V1QT-JVZZQVQH54D3-low.gif Figure 6-15 Watchdog Settings Window.
Single click the "En 520 No WD" button. The button must be selected whenever using the EVM for general operation unless standalone mode wants to be initiated at startup, see Figure 6-16.

GUID-20200824-CA0I-89CJ-8KFW-B8DQM9MNZ5GR-low.gifFigure 6-16 No Watch Dog Timer is Enabled.
The GUI will automatically do read all the registers after the "En 520 No WD" button has been selected, which deselects the CMWEN bit, see figure Figure 6-17.

GUID-20200807-CA0I-3R1G-ZBNN-NZN5VHBVVMMN-low.gifFigure 6-17 GUI After the "En 520 No WD" Button is Selected.