Texas Instruments UCC28780EVM-021, User Manual, Page: 15 / 28

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Performance Data and Typical Characteristic Curves
15 SLUUBV6 – August 2018
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Using the UCC28780EVM-021, 45-W, 20-V High-Density Silicon (Si) Based,
Active-Clamp Flyback Converter/Evaluation Module
5.10 Load Transient Response
Figure 29 and Figure 30 show output voltage Vout deviation < 5% for 0 and 2.25A load step change.
CH3 = Vout, CH4 = Load Current.
Figure 29. Vout Load Transient Response at V
IN
= 115 V
RMS
Figure 30. Vout Load Transient Response at V
IN
= 230 V
RMS
Figure 31 and Figure 32 show the switching node voltage response for 0 and 2.25A load step change.
CH2 = PWML, CH3 = Switch Node Voltage, CH4 = Load Current.
Figure 31. Load Transient Step-Up (0A to 2.25A)
Figure 32. Load Step-Down (2.25A to 0A)