TIDT352 October   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Load Transients
    3. 3.3 Start-Up and Shutdown Sequences

3.2 Load Transients

Figure 3-15 represents load transient 1 at 24 VIN with a 15-A steady-state load in parallel (not captured by the current probe), thus the images show a step and dump between 0 A and 30 A. Load transient 1 exhibits a step response, starting from a load of 15 A to 45 A, followed by a load dump from 45 A to 15 A. The load change time for both transitions is approximately 2 µs. The undershoot and overshoot for each is around 2% or 100 mV. For all images, the top trace represents VOUT, while the bottom represents IOUT.

GUID-20230830-SS0I-LZBP-LSDS-66RTSRSTRMSB-low.png Figure 3-2 Load Transient 1

Figure 3-3 illustrates the load transient 2 at 48 VIN with a 15-A load in parallel, thus the images show a step and dump between 0 A and 30 A. Load transient 2 exhibits a step response, starting from a load of 15 A to 45 A, followed by a load dump from 45 A to 15 A. The load change time for both transitions is approximately 2 µs. Both the overshoot and undershoot measure to be about 100 mV.

GUID-20230830-SS0I-DXGG-7XC8-LRJFT1XL14RM-low.png Figure 3-3 Load Transient 2