TIDT271 April   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Load Regulation
    3. 2.3 Line Regulation
    4. 2.4 Thermal Images
      1. 2.4.1 18-V Input Voltage and 500-mA Output Current
      2. 2.4.2 24-V Input Voltage and 500-mA Output Current
      3. 2.4.3 36-V Input Voltage and 500-mA Output Current
    5. 2.5 Bode Plots
      1. 2.5.1 18-V Input Voltage
      2. 2.5.2 24-V Input Voltage
      3. 2.5.3 32-V Input Voltage
  6. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 Transistor Q1 Drain-GND
        1. 3.1.1.1 18-V Input Voltage
        2. 3.1.1.2 24-V Input Voltage
      2. 3.1.2 Transistor Q1 Gate-Source
        1. 3.1.2.1 18-V Input Voltage
        2. 3.1.2.2 24-V Input Voltage
    2. 3.2 Output Voltage Ripple
      1. 3.2.1 18-V Input Voltage
      2. 3.2.2 24-V Input Voltage
    3. 3.3 Input Voltage Ripple
      1. 3.3.1 18-V Input Voltage
        1. 3.3.1.1 Input Terminal J2
        2. 3.3.1.2 Power Stage Input
      2. 3.3.2 24-V Input Voltage
        1. 3.3.2.1 Input Terminal J2
        2. 3.3.2.2 Power Stage Input
    4. 3.4 Load Transients
      1. 3.4.1 18-V Input Voltage
      2. 3.4.2 24-V Input Voltage
    5. 3.5 Start-Up Sequence
      1. 3.5.1 18-V Input Voltage
      2. 3.5.2 24-V Input Voltage
    6. 3.6 Shutdown Sequence
      1. 3.6.1 18-V Input Voltage
      2. 3.6.2 24-V Input Voltage

2.3 Line Regulation

In the line regulation graph in Figure 2-4, the output current was adjusted to 0.5 A.

GUID-20220321-SS0I-VMK2-T4QH-9GVHVZ8ZMSD4-low.jpg Figure 2-4 Line Regulation

With the same setup efficiency and loss were calculated as shown in Figure 2-5.

GUID-20220321-SS0I-TW70-GKL3-RPMKRD3GZF8C-low.jpg Figure 2-5 Efficiency and Loss vs Input Voltage