© 2012 Fairchild Semiconductor Corporation
17
FEBFAN9611_S01U300A
• Rev. 0.0.1
M2: AC Line Current (5A/div), CH3: AC Line Current (5A/div), Time (50ms/div)
Figure 16. Full-Load Startup at 115V
AC
Table 4. Inrush Current Limiting Circuit Effectiveness Comparison
Input Line
Voltage
Output
Power
Peak Line Current
(Inrush Circuit Disabled)
Peak Line Current
(Inrush Circuit Enabled)
% Inrush
Current
Reduction
V
IN
=115V
AC
300W 22.50A
PK
8.45A
PK
62.40%
V
IN
=230V
AC
300W 26.9A
PK
11.5A
PK
57.3%
AC Input Current
(Inrush Enabled)
AC Input Current
(Inrush Disabled)
AC Input Peak
Current (Zoom)
(Inrush Disabled)
33
Ω
NTC