FAN6749 Fairchild Semiconductor, FAN6749 Datasheet - Page 6

• Manufacturer Part Number: FAN6749
• Description: The FAN6749 highly integrated PWM controller enhances the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2012 Fairchild Semiconductor Corporation
FAN6749 • Rev. 1.0.0
Electrical Characteristics
V
HV Section
Oscillator Section
Symbol
t
DD
V
t
t
V
D-AC-OFF
S-CYCLE
t
UPDATE
f
△ V
I
H-TIME
AC-OFF
OSC-G
HV-LC
f
t
AC-ON
=15V and T
I
OSC
HOP
f
f
HV
DV
DT
AC
Supply Current from HV Pin
Leakage Current after Startup
Threshold Voltage for Brown-
out
Threshold Voltage for Brown-In DC Source Series R=200kΩ to HV Pin
V
Line Voltage Sample Cycle
Line Voltage Hold Period
Peak Line Voltage Data
Update Cycle for High / Low
Line Compensation
Debounce Time for Brown-out
Switching Frequency when V
Hopping Period
Switching Frequency When V
Frequency Variation vs. V
Frequency Variation vs. Temperature Deviation T
AC-ON
A
=25C unless otherwise noted.
- V
Parameter
AC-OFF
(6)
(6)
(Continued)
DD
(6)
Deviation
FB
FB
Figure 6. V
>V
<V
V
HV=500V, V
DC Source Series R=200kΩ to HV Pin
DC Source Series R=200kΩ to HV Pin
V
V
V
V
FB-N
FB-G
DC
FB
FB
FB
FB
=120V, V
> V
< V
> V
= V
FB-N
FB-G
FB-N
FB-G
DD-AC
DD
Conditions
DD
6
=V
& AC Recovery
=0V
Center Frequency
Hopping Range
Center Frequency
Hopping Range
V
DD-OFF
A
DD
=-40 to 105C
=11V to 22V
+1V
Continued on the following page…
±1.25
Min.
±3.5
100
170
400
2.0
90
18
20
64
70
62
16
20
8
±1.55
Typ.
±4.0
100
110
200
520
100
3.5
10
23
24
72
65
20
24
1
Max.
±1.85
±4.5
110
120
230
640
130
5.0
20
17
28
28
80
68
24
28
5
5
www.fairchildsemi.com
Unit
kHz
kHz
mA
ms
ms
ms
µA
µs
µs
%
%
V
V
V