Data Sheet

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN7621S • Rev. 1.0.1 7
FAN7621S — PFM Controller for Half-Bridge Resonant Converters
Typical Performance Characteristics
These characteristic graphs are normalized at T
A
=25ºC.
0.9
0.95
1
1.05
1.1
-50 -25 0 25 50 75 100
Temp (
O
C)
Normalized at 25
O
C
Temp (
O
C)
0.9
0.95
1
1.05
1.1
-50 -25 0 25 50 75 100
Normalized at 25
O
C
Figure 4. Low-Side MOSFET Duty Cycle
vs. Temperature
Figure 5. Switching Frequency vs. Temperature
0.9
0.95
1
1.05
1.1
-50 -25 0 25 50 75 100
Temp (
O
C)
Normalized at 25
O
C
0.9
0.95
1
1.05
1.1
-50 -25 0 25 50 75 100
Temp (
O
C)
Normalized at 25
O
C
Figure 6. High-Side
V
CC
(H
V
CC
) Start vs. Temperature Figure 7. High-Side
V
CC
(H
V
CC
) Stop vs. Temperature
0.9
0.95
1
1.05
1.1
-50 -25 0 25 50 75 100
Temp (
O
C)
Normalized at 25
O
C
0.9
0.95
1
1.05
1.1
-50 -25 0 25 50 75 100
Temp (
O
C)
Normalized at 25
O
C
Figure 8. Low-Side
V
CC
(L
V
CC
) Start vs. Temperature Figure 9. Low-Side
V
CC
(L
V
CC
) Stop vs. Temperature