SLUUCI5A July   2021  – November 2021 TPS92519-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Warnings and Cautions
  4. 3Description
    1. 3.1 Typical Applications
    2. 3.2 Features
    3. 3.3 Connector and Test Point Description
    4. 3.4 Electrical Performance Specifications
  5. 4Test Setup
    1. 4.1 Input Supplies and LED Load Connections
    2. 4.2 Switching Frequency Selection
    3. 4.3 Analog Dimming Using IADJx
    4. 4.4 PWM Dimming Using UDIMx and PWM Test Points
  6. 5Performance Data and Typical Characteristic Curves
    1. 5.1 Efficiency
    2. 5.2 Analog Dimming
    3. 5.3 PWM Dimming
    4. 5.4 PWM Dimming Waveforms
  7. 6Schematic
  8. 7TPS92519EVM-169 PCB Layout
  9. 8Bill of Materials
  10. 9Revision History

5.4 PWM Dimming Waveforms

Figure 5-4 1% Duty Cycle 250-Hz PWM Dimming Top = VSW, Middle = VPWM, Bottom = LED Current, Input Voltage = 48 V, 2 LEDs
Figure 5-5 50% Duty Cycle, 250-Hz PWM Dimming Top = VSW, Middle = VPWM, Bottom = LED Current, Input Voltage = 48 V, 2 LEDs
Figure 5-6 99% Duty Cycle, 250-Hz PWM Dimming Top = VSW, Middle = VPWM, Bottom = LED Current, Input Voltage = 14 V, 2 LEDs
Figure 5-7 1% Duty Cycle, 250-Hz PWM Dimming Top = VSW, Middle = VPWM, Bottom = LED Current, Input Voltage = 48 V, 4 LEDs
Figure 5-8 50% Duty Cycle, 250-Hz PWM Dimming Top = VSW, Middle = VPWM, Bottom = LED Current, Input Voltage = 48 V, 4 LEDs
Figure 5-9 99% Duty Cycle, 250-Hz PWM Dimming Top = VSW, Middle = VPWM, Bottom = LED Current, Input Voltage = 48 V, 4 LEDs