Texas Instruments UCC25640EVM-020, User Manual, Page: 22 / 40

Performance Data and Typical Characteristic Curves
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22 SLUUBX3B – June 2019 – Revised November 2019
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UCC25640EVM-020 Evaluation Module
9.10 Load Transient Response
The following waveforms show the output voltage with 115 VAC, 60 Hz applied to the AC input and 390
VDC applied to the DC input.
Figure 20 illustrates the dynamic voltage scaling through the entry and exit
of burst mode. The output voltage immediately exits standby mode, increasing to 12 V, when the BMT is
exceeded. It then drops to the 9.75 V standby output voltage level when the load falls below the BMT.
This behavior is due to the circuit explained in
Section 10.2 .
Figure 19. 300 mA to 15 A Transient (Ch2 = V
OUT
AC Coupled; Ch4 = I
OUT
)
Figure 20. 10 mA to 15 A Transient (Ch2 = V
OUT
DC Coupled; Ch4 = I
OUT
)