FAN6754B Fairchild Semiconductor, FAN6754B Datasheet - Page 7

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FAN6754B

Manufacturer Part Number
FAN6754B
Description
The highly integrated FAN6754A PWM controller provides several features to enhance the performance of flyback converters
Manufacturer
Fairchild Semiconductor
Datasheet
© 2011 Fairchild Semiconductor Corporation
FAN6754B • Rev.1.0.0
Electrical Characteristics
V
Oscillator Section
Feedback Input Section
Symbol
V
V
DD
V
V
f
FB-OPEN
t
V
V
FB-ZDCR
OSC-G
f
t
FB-OLP
D-OLP
FB-ZDC
Z
=15V and T
OSC
HOP
f
f
A
FB-N
FB-G
DV
DT
FB
V
Frequency in Normal Mode
Hopping Period
Green-Mode Frequency
Frequency Variation vs. V
Frequency Variation vs. Temperature Deviation T
Input Voltage to Current-Sense Attenuation
Input Impedance
Output High Voltage
FB Open-Loop Trigger Level
Delay Time of FB Pin Open-Loop Protection
Green-Mode Entry FB Voltage
Green-Mode Ending FB Voltage
FB Threshold Voltage for Zero-Duty Recovery
FB Threshold Voltage for Zero-Duty
A
=25C unless otherwise noted.
PWM Frequency
f
f
OSC-G
OSC
Parameter
V
FB-ZDC
(Continued)
V
DD
FB-ZDCR
Deviation
Figure 8. V
V
FB-G
FB
vs. PWM Frequency
7
V
Center Frequency
Hopping Range
FB > V
FB=V
V
FB Pin Open
Pin, FB Voltage
(FB =V
Hopping Range
Pin, FB Voltage
(FB =V
Hopping Range
FB-N
A
DD
=-40 to +105C
=11V to 22V
FB
Condition
FB-N
FB-G
FB
-
G
-
N
)
)
V
Continued on the following page…
FB
±1.27
Min.
1/4.5
±3.7
±3.7
10.2
3.9
2.6
2.1
1.9
1.8
4.8
4.3
61
19
14
±1.45
Typ.
1/4.0
±4.2
11.5
±4.2
4.4
5.0
4.6
2.8
2.3
2.1
2.0
65
22
16
±1.62
Max.
1/3.5
±4.7
±4.7
12.8
4.9
5.2
4.9
3.0
2.5
2.3
2.2
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69
25
18
62
5
5
Unit
KHz
KHz
kHz
kHz
V/V
ms
ms
kΩ
ms
%
%
V
V
V
V
V
V