UCC28C40_11 Datasheet, PDF (14/32 Pages) Texas Instruments – BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLER

UCC28C40, UCC28C41, UCC28C42, UCC28C43, UCC28C44, UCC28C45
UCC38C40, UCC38C41, UCC38C42, UCC38C43, UCC38C44, UCC38C45
SLUS458E -- AUGUST 2001 -- REVISED OCTOBER 2010
TYPICAL CHARACTERISTICS
SUPPLY CURRENT
vs
OSCILLATOR FREQUENCY
25
20
1-nF LOAD
15
10
NO LOAD
5
0
0k
200 k 400 k 600 k 800 k 1 M
f -- Frequency -- Hz
Figure 17
OUTPUT RISE TIME AND FALL TIME
vs
TEMPERATURE
40
10% to 90%
V_DD = 12 V
35
tr
(1 nF)
30
tf
(1 nF)
25
20
SUPPLY CURRENT
vs
TEMPERATURE
3.0
2.9
2.8
2.7
2.6
2.5
2.4
NO LOAD
2.3
2.2
2.1
2.0
--50 --25
0 25 50 75
T_J -- Temperature -- °C
Figure 18
100 125
MAXIMUM DUTY CYCLE
vs
OSCILLATOR FREQUENCY
100
CT = 220 pF
90
80
70
CT = 1 nF
60
15
10
50
--50 --25 0
25 50 75 100 125
0
500
1000 1500
2000
2500
T_J -- Temperature -- °C
f -- Frequency -- kHz
Figure 19
Figure 20
14
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