?2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6921ML " Rev. 1.0.3
13
Typical Performance Characteristics (Continued)
These characteristic graphs are normalized at T
A
=25癈.
2 2 . 0
2 3 . 0
2 4 . 0
2 5 . 0
2 6 . 0
2 7 . 0
2 8 . 0
- 4 0- 2 5- 1 0 5 2 0 3 5 5 0 6 5 8 0 9 5 1 1 01 2 5
m r r ?/DIV>
0 . 5 5
0 . 5 7
0 . 5 9
0 . 6 1
0 . 6 3
0 . 6 5
- 4 0- 2 5- 1 0 5 2 0 3 5 5 0 6 5 8 0 9 51 1 01 2 5
e m p e r a t u r e ?nbsp C
Figure 13. PFC Maximum On Time
Figure 14. PFC Peak Current Limit Voltage
1 6 . 0
1 6 . 5
1 7 . 0
1 7 . 5
1 8 . 0
1 8 . 5
1 9 . 0
- 4 0 - 2 5- 1 0 5 2 0 3 5 5 0 6 5 8 0 9 5 1 1 01 2 5
e m p e r a t u r e ?nbsp C
4 0 . 0
4 2 . 0
4 4 . 0
4 6 . 0
4 8 . 0
5 0 . 0
- 4 0- 2 5- 1 0 5 2 0 3 5 5 0 6 5 8 0 9 51 1 01 2 5
e m p e r a t u r e ?nbsp C
Figure 15. PWM Gate Output Clamping Voltage
Figure 16. PWM Maximum On Time
1 . 9 0
2 . 0 0
2 . 1 0
2 . 2 0
2 . 3 0
- 4 0- 2 5 - 1 0 5 2 0 3 5 5 0 6 5 8 0 9 5 1 1 01 2 5
m r r ?/DIV>
1 . 0
1 . 1
1 . 2
1 . 3
1 . 4
- 4 0 - 2 5 - 1 0 5 2 0 3 5 5 0 6 5 8 0 9 5 1 1 01 2 5
e m p e r a t u r e ?nbsp C
Figure 17. Beginning of Green-On Mode at V
FB
Figure 18. Beginning of Green-Off Mode at V
FB
7 . 0
7 . 5
8 . 0
8 . 5
9 . 0
- 4 0 - 2 5- 1 0 5 2 0 3 5 5 0 6 5 8 0 9 5 1 1 01 2 5
e m p e r a t u r e ?nbsp C
3 0 . 0
3 2 . 0
3 4 . 0
3 6 . 0
3 8 . 0
4 0 . 0
4 2 . 0
- 4 0- 2 5- 1 0 5 2 0 3 5 5 0 6 5 8 0 9 51 1 01 2 5
e m p e r a t u r e ?nbsp C
Fi r 1 . PWM Minim m ff Tim f r V > V
Fi r 2 . PWM Minim m ff Tim f r V =V