SLUUCQ0C August   2025  – September 2025 TPS922052 , TPS922053 , TPS922054 , TPS922055

PRODUCTION DATA  

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6. 1 Introduction
  7. 2 Warnings and Cautions
  8. 3 Description
    1. 3.1 Typical Applications
  9. 4 Test Setup
    1. 4.1 Connector Description
    2. 4.2 Input/Output Connection
  10. 5 Typical 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
  11. 6 Schematic
  12. 7 Layout
  13. 8 Bill of Materials
  14. 9 Additional Information
    1.     Trademarks
  15. 10Revision History

5.3 Load Regulation

Figure 5-4 shows the LED current deviation vs. the number of LEDs in series in analog dimming mode. Input voltage VIN is set at 48V. LED current is set at 1A and 4A with analog dimming. White LEDs are used as load. The number of LEDs in series is 8, 9, 10, 11, and 12, respectively. The frequency of the input PWM signal at the ADIM/HD pin is 20kHz.

Figure 5-5 shows the LED current deviation vs. the number of LEDs in series in PWM dimming mode. Input voltage VIN is set at 48V. LED current is set at 1A and 4A with PWM dimming. White LEDs are used as load. The number of LEDs in series is 8, 9, 10, 11, and 12, respectively. The frequency of the input PWM signal at the PWM/EN pin is 20kHz.

TPS922055EVM TPS922055 LED Current Deviation vs. Number of LEDs in Series in Analog Dimming ModeFigure 5-4 LED Current Deviation vs. Number of LEDs in Series in Analog Dimming Mode
TPS922055EVM TPS922055 LED Current Deviation vs. Number of LEDs in Series in PWM Dimming ModeFigure 5-5 LED Current Deviation vs. Number of LEDs in Series in PWM Dimming Mode