SG6846C Fairchild Semiconductor, SG6846C Datasheet - Page 9

• Manufacturer Part Number: SG6846C
• Description: The highly integrated PWM controller, SG6846C provides several features to enhance the performance of flyback converters
• Manufacturer: Fairchild Semiconductor

© 2007 Fairchild Semiconductor Corporation
SG6846C • Rev. 1.1.2
Typical Performance Characteristics
Figure 16. PWM Turn-on Threshold Voltage (V
70.0
69.8
69.6
69.4
69.2
69.0
0.910
0.905
0.900
0.895
0.890
65.0
64.8
64.6
64.4
64.2
64.0
-40
Figure 12. Normal PWM Frequency (f
-40
Figure 14. Output Current of RT Pin (I
-40
Norm al P W M F requenc y (F
O u tp u t C u r r e n t o f R T P i n ( I
-25
-25
P W M T urn-o n T hres ho ld V olt a ge (V
-25
-10
-10
-10
5
5
5
vs. Temperature
vs. Temperature
vs. Temperature
20
Te m p e r a tu r e ( ℃ )
Te m p e r a tu re ( ℃ )
20
T em perat u re (℃ )
20
T em perat u re
35
35
35
50
50
50
R T
O S C
) v s Te m p e r a tu r e
65
65
65
) v s T em perat ure
80
80
80
IN - O N
95
95
95
OSC
) v s
RT
110
110
110
)
)
IN-ON
(Continued)
125
125
125
)
9
Figure 17. PWM Turn-off Threshold Voltage (V
87.0
86.8
86.6
86.4
86.2
86.0
1.10
1.08
1.06
1.04
1.02
1.00
0.700
0.695
0.690
0.685
0.680
Figure 15. FB Output High Voltage (V
Figure 13. Maximum Duty Cycle (DCY
-40
-40
-40
F B O u t pu t Hi g h V o l t a ge (V
P W M T urn-of f T hres hol d V ol t age (V
-25
-25
Maximum Duty Cycle (DCYmax) vs Temperature
-25
-10
-10
-10
5
5
5
vs. Temperature
vs. Temperature
vs. Temperature
T e m p e r a tu r e ( ℃ )
20
20
Temperature (℃ )
T em perat ure (℃ )
20
T em perat ure
35
35
35
50
50
R T T H
50
65
65
) v s T em pe ra t u re
65
80
80
80
IN - O F F
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95
95
95
RTTH
MAX
) v s
110
110
110
)
)
IN-OFF
125
125
125
)