SNVU821 November   2023 TPS92642-Q1

 

  1.   1
  2.   TPS92642EVM-203 5-A Synchronous Buck IR LED Driver Evaluation Module
  3.   Trademarks
  4. 1Introduction
  5. 2Warnings and Cautions
  6. 3Description
    1. 3.1 Typical Applications
    2. 3.2 Features
    3. 3.3 Connector and Test Point Description
    4. 3.4 Electrical Performance Specifications
  7. 4Test Setup
    1. 4.1 Input Supplies and LED Load Connections
    2. 4.2 Pulse Duty Cycle Limit (PLMT) Control
    3. 4.3 Analog Dimming Using IADJ
    4. 4.4 PWM Dimming Using nExt_PWM Test Points
    5. 4.5 Switching Frequency Set Point Using RON
  8. 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
  9. 6Schematic
  10. 7PCB Layout
  11. 8Bill of Materials

5.4 PWM Dimming Waveforms

GUID-DFC39CDD-7F42-436E-99DC-128CEDC71B2A-low.svgFigure 5-4 1% Duty Cycle 250-Hz PWM, Input Voltage = 14 V, 2 LEDs
GUID-90645279-8C9A-485E-9B37-748F9100893A-low.svgFigure 5-5 50% Duty Cycle, 250-Hz PWM, Input Voltage = 14 V, 2 LEDs
GUID-FB3A26CC-D95E-4A5B-A8DB-8888FA9BE284-low.svgFigure 5-6 99% Duty Cycle, 250-Hz PWM, Input Voltage = 14 V, 2 LEDs