FAN6861 Fairchild Semiconductor, FAN6861 Datasheet - Page 9

• Manufacturer Part Number: FAN6861
• Description: A highly integrated PWM controller, FAN6861 provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN6861 • Rev. 1.0.1
Typical Performance Characteristics
Figure 11. FB Threshold Voltage For Frequency
Figure 15. Second Threshold Voltage for Over-
Figure 13. FB Threshold Voltage for Zero Duty
2.92
2.91
2.89
2.88
2.87
2.86
1.95
1.85
1.75
0.715
0.705
0.695
2.9
1.9
1.8
1.7
0.72
0.71
0.69
Temperature Protection (V
0.7
2
-40 ℃
-40 ℃
-40 ℃
-30 ℃
-30 ℃
-30 ℃
Reduction (V
-15 ℃
-15 ℃
-15 ℃
(V
V
V
V
FB-ZDC
OTP2
ZDC
FB-N
0 ℃
0 ℃
0 ℃
vs Temperature (℃)
vs Temperature (℃)
vs Temperature (℃)
Temperature (℃)
Temperature (℃)
Temperature (℃)
) vs. Temperature
FB-N
25 ℃
25 ℃
25 ℃
) vs. Temperature
50 ℃
50 ℃
50 ℃
OPT2
75 ℃
75 ℃
75 ℃
) vs. Temperature
85 ℃
85 ℃
85 ℃
100 ℃
100 ℃
100 ℃
125 ℃
125 ℃
125 ℃
9
Figure 12. FB Voltage at f
Figure 14. Threshold Voltage for Over-Temperature
2.25
2.15
2.05
1.05
0.95
0.85
104
102
100
2.3
2.2
2.1
1.1
0.9
98
96
94
92
90
88
86
84
-40 ℃
2
1
-40 ℃
-40 ℃
Figure 16. Output Current of RT Pin (I
-30 ℃
-30 ℃
-30 ℃
Protection (V
-15 ℃
-15 ℃
-15 ℃
V
V
FB-G
OTP1
I
RT
0 ℃
0 ℃
vs. Temperature
0 ℃
vs Temperature (℃)
vs Temperature (℃)
vs Temperature (℃)
Temperature (℃)
Temperature (℃)
Temperature (℃)
OTP1
25 ℃
25 ℃
OSC-G
25 ℃
) vs. Temperature
50 ℃
50 ℃
50 ℃
(V
FB-N
75 ℃
75 ℃
75 ℃
) vs. Temperature
85 ℃
85 ℃
85 ℃
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100 ℃
RT
100 ℃
100 ℃
)
125 ℃
125 ℃
125 ℃