CMOS CURRENT MODE
PWM CONTROLLERS
1
2
3
4
5
6
7
8
TC18C46
TC28C46
TC38C46
TYPICAL CHARACTERISTICS
18C46 Dead Time vs. Ct
18C46 Dead Time vs. Rt
11000
10000
11000
10000
9000
8000
4700pF
9000
8000
7000
6000
7000
6000
5000
2200pF
1000pF
5000
4000
10k
4000
3000
3000
2000
1000
0
2k
2000
500pF
100pF
100k
1000
0
1000
2000
3000
4000
5000
20
40
60
R , kΩ
80
100
C , pF
t
t
18C46 OSC Frequency vs. Ct
18C46 OSC Frequency vs. Rt
400
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
100pF
2k
500pF
1000pF
2200pF
10k
100k
4700pF
60
0
0
1000
2000
3000
4000
5000
20
40
80
100
C , pF
R , kΩ
t
t
TELCOM SEMICONDUCTOR, INC.
4-109
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
