Data Sheet

© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6 15
FSQ0365/0265/0165/321 — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter
t
s
max
=18
s
t
s
max
=18
s
t
B
=15
s
t
s
t
B
=15
s
t
s
t
s
I
DS
I
DS
I
DS
I
DS
A
B
C
D
t
W
=3
s
t
B
=15
s
t
B
=15
s
I
DS
I
DS
I
DS
I
DS
FSQ0365RN Rev. 00
Figure 27. Valley Switching with Limited Frequency
55kHz
67kHz
59kHz
Burst
mode
Constant
frequency
D
C
B
A
P
O
When the resonant period is 2s
FSQ0365RN Rev. 00
Figure 28. Switching Frequency Range