286861.fig.004a
(a)
286861.fig.004b
(b)
286861.fig.004c
(c)
286861.fig.004d
(d)
Figure 4: Normalized voltages of the error amplifier , the feed-forward network , and the divider output , in the original design (250 W) (a); modified design (250 W) (b), Modified design (125 W) (c), Modified design waveforms of the normalized rectified voltage , converter's input current , and the APFC's charging current (d).