Fairchild FEBFAN9611 S01U300A, Руководство пользователя

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© 2012 Fairchild Semiconductor Corporation 24 FEBFAN9611_S01U300A • Rev. 0.0.1
10.3. Line Transient
Figure 29 and Figure 30 show the line transient operation and minimal effect on output
voltage due to the line feed-forward function. When the line voltage changes from
230V
AC
to 115V
AC
, about 20V (5% of nominal output voltage) voltage undershoot is
observed. When the line voltage changes from 115V
AC
to 230V
AC
, about 6V (1.5% of
nominal output voltage) voltage overshoot is observed.
CH1: Rectified Line Voltage (200V/div), CH2: Output Voltage (20V/div, AC),
CH3: COMP Voltage (2V/div), CH4: Line Current (5A/div), Time (50ms/div)
Figure 29. Line Transient Response at Full-Load Condition (230V
AC

115V
AC
)
CH1: Rectified Line Voltage (200V/div), CH2: Output Voltage (10V/div, AC),
CH3: COMP Voltage (2V/div), CH4: Line Current (5A/div), Time (50ms/div)
Figure 30. Line Transient Response at Full-Load Condition (115V
AC

230V
AC
)
Line
Current
COMP
Rectified
Line
Voltage
V
OUT
Line
Current
COMP
Rectified
Line
Voltage
V
OUT