SLAU915 May   2024 ULC1001

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 2Hardware
    1. 2.1 Hardware Information
    2. 2.2 Connection Procedure
  8. 3Software
    1. 3.1 GUI Setup
    2. 3.2 System Overview
      1. 3.2.1 System ISR Period
      2. 3.2.2 System Drive Voltage
      3. 3.2.3 System Calibration
        1. 3.2.3.1 DC Bias Calibration
        2. 3.2.3.2 Temperature Calibration
        3. 3.2.3.3 Auto Sense Calibration
        4. 3.2.3.4 Cleaning and Power Calibration
      4. 3.2.4 System Cleaning
      5. 3.2.5 System Diagnostics
    3. 3.3 GUI Overview
      1. 3.3.1 GUI Top Level Layout
        1. 3.3.1.1 North Pane
        2. 3.3.1.2 South Pane
        3. 3.3.1.3 Center Pane
      2. 3.3.2 High Level Page
        1. 3.3.2.1 Burst Parameters
        2. 3.3.2.2 Calibration Settings
          1. 3.3.2.2.1 Voltage and Current Sense Circuitry
        3. 3.3.2.3 Cleaning Mode Settings
          1. 3.3.2.3.1 Auto-Cleaning
          2. 3.3.2.3.2 Water Cleaning
          3. 3.3.2.3.3 Deice Cleaning
          4. 3.3.2.3.4 Mud Cleaning Mode
        4. 3.3.2.4 Power and Diagnostic Settings
      3. 3.3.3 Register Map Page
      4. 3.3.4 I2C Configuration Page
      5. 3.3.5 GUI Functions
        1. 3.3.5.1 Monitor Communication Status
        2. 3.3.5.2 Load and Save Configuration Files
          1. 3.3.5.2.1 MSP430 Firmware Programming
        3. 3.3.5.3 Re-initialize System
        4. 3.3.5.4 Fault and Flag Monitoring and Clearing
        5. 3.3.5.5 Run Calibration
        6. 3.3.5.6 Run Cleaning Modes
        7. 3.3.5.7 Run Diagnostic Mode
        8. 3.3.5.8 Run Abort
        9. 3.3.5.9 Script Recording
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks

3.2.3.2 Temperature Calibration

The second burst in a typical calibration sequence is for temperature calibration, CONTROL_Burst_Cal_Region_Temp (5). The temperature is calibrated at a single frequency that is far from any resonance frequency in the LCS's impedance response. An example is shown in Figure 4-3. The temperature slope constant, USER_Params_tempParams_slope_CperOhm_Q27, and the calibration temperature, USER_Params_tempParams_calTemp_C_Q21, must be set to properly calibrate the LCS temperature. The temperature slope is determined by measuring the LCS impedance across temperature and finding the slope of the best fit line where the x-axis is impedance and the y-axis is temperature, the inverse of the example figure. The calibration temperature, calTemp, is the ambient temperature (in Celsius) of the LCS when calibration is run. The impedance decreases as the temperature increases making the temperature slope constant negative. When the calibration sequence is run, the temperature slope constant, USER_Params_tempParams_constant_C_Q21, is set to an appropriate value.

ULC1001-DRV2911EVM LCS Impedance vs TemperatureFigure 3-3 LCS Impedance vs Temperature