TIDT261 March   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 4-V Input Voltage
        1. 2.4.1.1 3-A Output Current – Average Load Current
        2. 2.4.1.2 5-A Output Current – Peak Load Current
      2. 2.4.2 12-V Input Voltage
        1. 2.4.2.1 3-A Output Current
        2. 2.4.2.2 5-A Output Current
      3. 2.4.3 18-V Input Voltage
        1. 2.4.3.1 3-A Output Current
        2. 2.4.3.2 5-A Output Current
    5. 2.5 Bode Plots
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Input Voltage Ripple
    4. 3.4 Load Transients
    5. 3.5 Start-Up Sequence
    6. 3.6 Shutdown Sequence

3.4 Load Transients

Electronic load was used for the waveforms taken in the following images. The load is switching from 2.5 A to 5 A with a frequency of 100 Hz.

4-V Input Voltage

GUID-20220224-SS0I-JDHL-TN0F-4BXDK8TVL43W-low.jpg
Ch1 ⇒ output voltage; 200 mV / div; AC-coupling; 10-kHz bandwidth
Ch2 ⇒ output current; 2 A / div; 20-MHz bandwidth
2-ms / div
Figure 3-18 2.5-A to 5-A Load Transient at 4-V Input Voltage

12-V Input Voltage

GUID-20220224-SS0I-TXNQ-D3BD-L2PTJCL7PTK3-low.jpg
Ch1 ⇒ output voltage; 50 mV / div; AC-coupling; 10-kHz bandwidth
Ch2 ⇒ output current; 2 A / div; 20-MHz bandwidth
2-ms / div
Figure 3-19 2.5-A to 5-A Load Transient at 12-V Input Voltage

18-V Input Voltage

GUID-20220224-SS0I-2XQL-XN1X-M03SZRZRQGWD-low.jpg
Ch1 ⇒ output voltage; 50 mV / div; AC-coupling; 10-kHz bandwidth
Ch2 ⇒ output current; 2 A / div; 20-MHz bandwidth
2-ms / div
Figure 3-20 2.5-A to 5-A Load Transient at 18-V Input Voltage