SLUUCQ0A may   2023  – june 2023 TPS922052 , TPS922053 , TPS922054 , TPS922055

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Warnings and Cautions
  6. 3Description
    1. 3.1 Typical Applications
  7. 4Test Setup
    1. 4.1 Connector Description
    2. 4.2 Input/Output Connection
  8. 5Typical Characteristics Curves and Waveforms
    1. 5.1 Efficiency
    2. 5.2 Line Regulation
    3. 5.3 Load Regulation
    4. 5.4 Analog Dimming Performance
    5. 5.5 PWM Dimming Performance
    6. 5.6 Hybrid Dimming Performance
    7. 5.7 Flexible Dimming Performance
  9. 6Schematic
  10. 7Layout
  11. 8Bill of Materials
  12. 9Revision History

5.4 Analog Dimming Performance

Figure 5-6 gives the test result of linearity of analog dimming, in comparison with the theoretical value. Input voltage is 48V, with 7 white LEDs in series used as load. The full-scale LED current is set at 4.0 A. The frequency of the input PWM signal at the ADIM/HD pin is 20 kHz.

GUID-20230224-SS0I-TVXG-ZNZH-PNS3CMRNWJ9D-low.pngFigure 5-6 Analog Dimming Linearity