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18
AN-8026 / FEB301_FAN9611 / FAN9612 • Rev. 0.0.4
8.3.
Line and Load Transient
Test Condition: 115V
AC
to 230V
AC
full load transient and 230V
AC
load transient.
Figure 15. 230V
AC
to 115V
AC
Line Transient
Figure 16. 115V
AC
to 230V
AC
Line Transient
Note:
6.
Figure 15 and Figure 16 show the line transient operation and minimal effect on the output voltage due to the line
feed forward function. When the line voltage changes from 230V
AC
to 115V
AC
, 14.5V (3.72% of nominal output
voltage) voltage undershoot is observed. When the line voltage changes from 115V
AC
to 230V
AC
, almost no
voltage undershoot is observed.
Figure 17. 230V
AC
100% to 0% Line Transient
Figure 18. 230V
AC
0% to 100% Line Transient
Note:
7.
Figure 17 and Figure 18 show the load-transient operation. When the output load changes from 100% to 0%,
23.6V (6.1% of nominal output voltage) voltage overshoot is observed. When the output load changes from 0%
to 100%, 23.9V (6.13% of nominal output voltage) voltage undershoot is observed.
