Datasheet

   
   
SLUS517C − DECEMBER 2002 − REVISED SEPTEMBER 2005
27
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TYPICAL CHARACTERISTICS
Figure 20
GT1 MAXIMUM DUTY CYCLE
vs
PFC SWITCHING FREQUENCY (C
AOUT
= 0.85 V)
GT1 Maximum Duty Cycle − %
0
200
50
0
94
97
100
99
98
96
95
400
GT1 Switching Frequency − kHz
300100
Figure 21
GT1, GT2 PULL-UP, PULL-DOWN RESISTANCE
vs
TEMPERATURE
R
DS(on)
− Gate Resistance − Ω
Temperature − °C
−50 25 125
0
5
8
7
6
2
1
75
4
3
−25 0 50 100
Pull-up
Pull-down
06
0
25
45
35
30
10
5
4
20
12
2
40
Figure 22
GT1 RISE/FALL TIME
vs
C
LOAD
AND R
SERIES
(V
CC
= 12 V)
t
R
, t
F
− Rise and Fall Time − ns
C
LOAD
− nF
t
R
: R
SERIES
= 2 Ω
t
F
: R
SERIES
= 2 Ω
t
R
: R
SERIES
= 10 Ω
t
F
: R
SERIES
= 10 Ω
Figure 23
−50 125
0
10
18
14
12
4
2
100
8
6
0
16
755025−25
GT1, GT2 RISE AND FALL TIMES
vs
TEMPERATURE
t
R
t
F
Temperature − °C
t
R
, t
F
− Rise and Fall Time − ns