SLAAEP3 December   2025 ULC1001

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Acronyms
  5. 2 Introduction
  6. 3 Impedance Response
    1. 3.1 Piezo Only
    2. 3.2 Lens Cover
    3. 3.3 Lens Cover System (LCS)
  7. 4 Equivalent Circuit Model of LCS
  8. 5 LC Filter for LCS
  9. 6 Water Cleaning
  10. 7 Power Consumption
  11. 8 Reliability
  12. 9 Other Tests
    1. 9.1 De-ice
    2. 9.2 Mud Cleaning
    3. 9.3 Optical Interference
    4. 9.4 Waterproof Capability
  13. 10Resources

7 Power Consumption

Figure 7-1 shows the setup with the ULC1001-DRV2911EVM to measure the power consumption. A voltage probe and a current probe are used to measure the voltage and current across the LCS. The current from the power supply is also recorded. For details on how to use ULC1001-DRV2911EVM, please refer to the ULC1001-DRV2911EVM User Guide.

The Measurement Setup with ULC1001-DRV2911EVMFigure 7-1 The Measurement Setup with ULC1001-DRV2911EVM

Figure 7-2 shows the voltage and current across the LCS near f1 (30kHz) and f2 (66 kHz). The peak voltage is 140V and the peak current is 0.4A. Note that the voltage and current across the LCS have a phase difference. The peak power of LCS can be easily estimated by the current from the power supply.

Power Consumption of LCS during Water ModeFigure 7-2 Power Consumption of LCS during Water Mode

Table 7-1 shows the electrical characteristics of the LCS.

Table 7-1 Electrical Characteristics of LCS
ParametersValueUnitDescription
Vp70VPeak voltage across the LCS
Ip0.5APeak current across the LCS
Vd12VDC voltage of power supply
Id0.35ADC peak current of power supply
P4.2WPeak power