SG6846A Fairchild Semiconductor, SG6846A Datasheet - Page 10

• Manufacturer Part Number: SG6846A
• Description: The highly integrated SG6846A series of PWM controllers provides features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
SG6846A • Rev. 1.1.5
Typical Performance Characteristics
Figure 16. Current-Limit Threshold vs. V
0.90
0.85
0.80
0.75
0.70
0.65
0.60
85
80
75
70
65
60
71.0
70.5
70.0
69.5
69.0
68.5
Figure 14. Normal PWM Frequency (f
Figure 18. Output Current of RT Pin (I
-40 -25 -10
0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3
-40 -25 -10
5
Temperature (°C)
vs. Temperature
vs. Temperature
5
Temperature (℃)
20
VIN ( V )
20 35 50 65 80 95 110 125
35
50
65
80
95
IN
OSC
Voltage
RT
110 125
)
)
(Continued)
10
Figure 17. 2/3 Current-Limit Threshold vs. V
Figure 15. PWM Frequency vs. FB Voltage
Figure 19. FB Output High Voltage (V
70
56
42
28
14
0.90
0.82
0.74
0.66
0.58
0.50
1.4
1.2
1.0
0.8
0.6
0.4
0
1.6
0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3
-40 -25 -10
1.7
1.8
vs. Temperature
5
Temperature (℃)
1.9
20 35 50 65 80 95 110 125
VFB (V)
VIN (V)
2.0
2.1
2.2
2.3
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RTTH
IN
Voltage
2.4
)