International Rectifier IRAC27951, User Manual, Page: 13 / 16

Rev. 4.0 5/22/2010 International Rectifier Page 13 of 16
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INTERNATIONAL RECTIFIER.
5.3 Dynamic Load Response & Output Voltage Regulation
A load step from full load to no load and no load to full load was applied to test the dynamic response of the
system. The output voltage is tightly regulated within a 3% regulation band over the entire line load range. A
summary of the load performance is also shown below.
Ch 3 : 24V Rail output voltage Ch 2 : 12V Rail output voltage
Ch 4 : Resonant tank current
No Load to Full Load Step Full Load to No Load Step
23.4
23.6
23.8
24
24.2
24.4
24.6
11.8
11.85
11.9
11.95
12
12.05
12.1
12.15
12.2
0 1 2 3 4 5 6
V
o
u
t
(V
)
Iout (A)
Load Regulation
12V Output 24V Output
Figure 7 - Output voltage regulation plot