© 2012 Fairchild Semiconductor Corporation
20
FEBFAN9611_S01U300A
• Rev. 0.0.1
10.2.
Steady-State Operation
Figure 21 and Figure 22 show the two inductor currents and the sum of the two inductor
currents operating at full load for 90V
AC
and 230V
AC
line voltage. The sum of the
inductor currents has relatively small ripple due to the ripple cancellation of interleaving.
CH3: Inductor L2 Current (5A/div), CH4: Inductor L1 Current (5A/div),
CH2: Sum of Two Inductor Currents (5A/div), Time (2ms/div, zoom to 10
s/div)
Figure 21. Zoom of Inductor Current Waveforms at Full-Load and 90V
AC
CH3: Inductor L1 Current (2A/div), CH4: Inductor L2 Current (2A/div),
CH2: Sum of Two Inductor Current (2A/div), Time (2ms/div)
Figure 22. Zoom of Inductor Current Waveforms at Full-Load and 230V
AC
I
L2
I
L1
I
L1
+ I
L2
I
L2
I
L1
I
L1
+ I
L2
