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

De-ice

De-icing requires a greater amount of power compared to water cleaning. In the design of the LCS, the mode operating at 560kHz exhibits a significantly lower impedance relative to the mode at 65kHz, making it more advantageous for generating heat and facilitating de-icing. To effectively implement the de-icing mode with the ULC1001-DRV2911EVM, it is necessary to eliminate the LC low-pass filter, as the voltage attenuation is considerably high at 560kHz.

In light of the required de-icing speed, it may be necessary to incorporate a separate heating element to achieve optimal de-icing efficiency. This recommendation arises from the relatively limited heating efficiency of piezo materials compared to other specifically designated heating alternatives.