FAN6747 Fairchild Semiconductor, FAN6747 Datasheet - Page 7

• Manufacturer Part Number: FAN6747
• Description: The highly integrated FAN6747 PWM controller provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2010 Fairchild Semiconductor Corporation
FAN6747 • Rev. 1.0.3
Electrical Characteristics
V
Oscillator Section
DD
Symbol
=15V and T
f
V
V
t
t
OSC-G
f
JTR-1
JTR-3
OSC
FB-N
FB-G
Normal PWM Frequency
Jitter Period 1
Jitter Period 3
Green-Mode Minimum Frequency
FB Threshold Voltage for
Frequency Reduction Beginning
FB Threshold Voltage for Turn-
Off Jitter and Frequency
Reduction Destination
A
=25°C, unless otherwise specified.
Parameter
Figure 9. V
Figure 8. Brownout Behavior
Center Frequency
(V
V
V
Pin, FB Voltage
(V
f
Jitter Range
Pin, FB Voltage
(V
Jitter Range
OSC
FB
FB
FB
FB
FB
DD-AC
=V
Conditions
> V
>V
=V
=V
– 5KHz
FB
FB-N
FB-N
FB-G
FB
-
7
and AC Recovery
G
-
N
)
),
)
Min.
10.2
±3.7
3.9
2.6
2.1
61
19
±1.45
Typ.
11.5
±4.2
4.4
2.8
2.3
65
22
Max.
12.8
±4.7
4.9
3.0
2.5
69
25
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Units
kHz
kHz
kHz
kHz
ms
ms
V
V