SG6846G Fairchild Semiconductor, SG6846G Datasheet - Page 9

• Manufacturer Part Number: SG6846G
• Description: A highly integrated PWM controller, SG6846G provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
SG6846G • Rev. 1.0.2
Typical Performance Characteristics
Figure 16. PWM Turn-on Threshold Voltage (V
70 .0
69 .8
69 .6
69 .4
69 .2
69 .0
0.9 10
0.9 05
0.9 00
0.8 95
0.8 90
65.0
64.8
64.6
64.4
64.2
64.0
-4 0
Figure 12. Normal PWM Frequency (f
Figure 14. Output Current of RT Pin (I
-4 0
-4 0
-25
-2 5
-2 5
-10
-1 0
-10
5
5
5
vs. Temperature
vs. Temperature
vs. Temperature
20
T e m p e r a tu r e ( ℃ )
T e m p e r a tu r e ( ℃ )
T e m p e ra t u re (℃ )
2 0
2 0
T e m p e ra t u re
35
35
3 5
50
5 0
5 0
65
65
65
80
80
80
95
9 5
9 5
OSC
RT
110
1 10
11 0
)
)
IN-ON
125
12 5
1 25
(Continued)
)
9
Figure 17. PWM Turn-off Threshold Voltage (V
8 7.0
8 6.8
8 6.6
8 6.4
8 6.2
8 6.0
1 .1 0
1 .0 8
1 .0 6
1 .0 4
1 .0 2
1 .0 0
0 .700
0 .695
0 .690
0 .685
0 .680
Figure 15. FB Output High Voltage (V
Figure 13. Maximum Duty Cycle (DCY
-4 0
-40
-40
-25
-2 5
-25
-1 0
-1 0
-1 0
5
5
5
vs. Temperature
vs. Temperature
vs. Temperature
T e m p e r a tu r e ( ℃ )
2 0
2 0
Temperature (℃ )
T e m p e ra t u re (℃ )
20
3 5
3 5
3 5
5 0
50
50
6 5
6 5
6 5
8 0
8 0
80
9 5
95
95
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RTTH
MAX
11 0
1 10
11 0
)
)
IN-OFF
1 25
1 2 5
125
)