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

5.1 Efficiency

Figure 5-1 shows the efficiency versus input duty cycle in analog dimming mode. The full-scale LED current IFS is set at 4 A. The frequency of the input PWM signal at the ADIM/HD pin is 20 kHz. Input voltage VIN is 48 V. The load is 8 white LEDs in series.

Figure 5-2 shows the efficiency versus input duty cycle in PWM dimming mode. The full-scale LED current IFS is set at 4 A. The frequency of the input PWM signal at the PWM/EN pin is 20 kHz. Input voltage VIN is 48 V. The load is 8 white LEDs in series.

GUID-20230506-SS0I-VGLR-JHQ2-QH0DKVRPKWWF-low.svgFigure 5-1 Efficiency vs. Input Duty Cycle in Analog Dimming Mode
GUID-20230506-SS0I-TX2P-DFLL-6HZG2Z0BHWXC-low.svgFigure 5-2 Efficiency vs. Input Duty Cycle in PWM Dimming Mode