SG6846B Fairchild Semiconductor, SG6846B Datasheet - Page 9

• Manufacturer Part Number: SG6846B
• Description: The highly integrated PWM controller, SG6846B, provides several features to enhance the performance of fly-back converters
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
SG6846B • Rev. 1.3.4
Typical Performance Characteristics
Figure 11. OCP Threshold Voltage for Current Limit
Figure 9. Startup Current (I
26. 0
22. 0
18. 0
14. 0
10. 0
1 7 .0
1 6 .8
1 6 .6
1 6 .4
1 6 .2
1 6 .0
6. 0
0. 66
0. 64
0. 62
0. 60
0. 58
0. 56
Figure 7. Turn-on Threshold Voltage (V
-40
-4 0
-40
OCP Threshold Voltage for Current Limit (V
-25
-2 5
-25
Turn-on Threshold Voltage (V
-10
-1 0
Startup Current (I
-10
(V
STH1V-2/3
5
5
5
vs. Temperature
20
20
2 0
Temperature (℃ )
Temperature ( ℃ )
Temperature ( ℃ )
Temperature
) vs. Temperature
35
35
3 5
DD -ST
50
DD-ST
50
5 0
) vs Temperature
DD-ON
65
) vs. Temperature
65
6 5
) vs Temperature
80
80
STH1V-2/3
8 0
95
95
9 5
DD-ON
) vs
110
110
1 1 0
)
125
125
1 2 5
9
Figure 12. OCP Threshold Voltage for Current Limit
6 .0
5 .5
5 .0
4 .5
4 .0
0. 60
0. 58
0. 56
0. 54
0. 52
0. 50
1 1 .5
1 1 .0
1 0 .5
1 0 .0
9 .5
9 .0
Figure 10. Operating Supply Current (I
Figure 8. Turn-off Threshold Voltage (V
-4 0
-40
-4 0
OCP ThresholdVoltage for Current Limit (V
-2 5
-25
Operating Supply Current (IDD-op) vs Temperature
-2 5
Turn-off Voltage (V
-1 0
-10
-1 0
(V
STH3V-2/3
5
5
5
vs. Temperature
2 0
20
Temperature (℃ )
2 0
Temperature
Temperature (℃)
Temperature ( ℃ )
Temperature
) vs. Temperature
3 5
35
DD-OFF
3 5
5 0
50
) vs Temperature
5 0
65
6 5
6 5
STH3V-2/3
80
8 0
8 0
www.fairchildsemi.com
DD-op
95
9 5
9 5
) vs
DD-OFF
) vs.
110
1 1 0
1 1 0
)
125
1 2 5
1 2 5