FAN6747 Fairchild Semiconductor, FAN6747 Datasheet - Page 8

• 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
Feedback Input Section
DD
Symbol
(V
-V
V
V
V
V
=15V and T
t
V
FB-ZDC
OZ-OFF
D-OLP
FB-OLP
OZ-ON
OZ-ON
OZ-OFF
Z
f
f
A
DV
FBO
DT
FB
V
)
FB Threshold Voltage for Zero-
Duty Recovery
FB Threshold Voltage for Zero-
Duty
FB Voltage Hysteresis for V
to V
Frequency Variation vs. V
Deviation
Frequency Variation vs.
Temperature Deviation
Input-Voltage to Current-Sense
Attenuation
Input Impedance
FB Pin Open Voltage
FB Open-Loop Protection
Threshold Voltage
Open-Loop Protection Debounce
A
=25°C, unless otherwise specified.
OZ-OFF
Parameter
DD
Figure 11. Burst-Mode Diagram
OZ-ON
Figure 10. PWM Frequency
V
T
V
A
DD
FB
=-40 to 105°C
=12V to 22V
Conditions
< V
FB-G
8
Min.
1/4.5
13.4
190
1.6
1.5
4.8
4.3
50
Typ.
1/4.0
15.5
100
215
1.8
1.7
5.0
4.6
Max.
1/3.5
17.6
150
240
2.0
1.9
5.2
4.9
5
5
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Units
V/V
mV
kΩ
ms
%
%
V
V
V
V