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参数资料
| 型号： | TL1454CD |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A DUAL SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | PLASTIC, SO-16 |
| 文件页数： | 5/25页 |
| 文件大小： | 412K |
| 代理商： | TL1454CD |
TL1454, TL1454Y
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS086B – APRIL 1995 – REVISED NOVEMBER 1997
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
TYPICAL CHARACTERISTICS
Figure 6
100 k
10 k
1 k
OSCILLATOR FREQUENCY
vs
TIMING RESISTANCE
RT – Timing Resistance –
f–
Oscillator
Frequency
–
Hz
1 k
10 k
100 k
10 M
1 M
CT = 10 pF
CT = 120 pF
CT = 3900 pF
VCC = 6 V
TA = 25°C
CT = 1000 pF
CT = 300 pF
Figure 7
t–
Oscillation
Period
–
OSCILLATOR PERIOD
vs
TIMING CAPACITANCE
10 –1
10 0
10 5
CT – Timing Capacitance – pF
s
10 1
10 0
10 1
VCC = 6 V
RT = 5.1 k
TA = 25°C
10 2
10 3
10 4
Figure 8
–
Oscillator
Frequency
–
kHz
510
500
490
480
520
OSCILLATOR FREQUENCY
vs
FREE-AIR TEMPERATURE
530
– 50
0
50
100
TA – Free-Air Temperature – °C
VCC = 6 V
RT = 10 k
CT = 120 pF
oscf
Figure 9
1.5
1
0.5
2
PWM
T
riangle
W
aveform
Amplitude
–
V
PWM TRIANGLE WAVEFORM AMPLITUDE
vs
TIMING CAPACITANCE
10 0
10 1
10 2
10 3
Timing Capacitance – pF
10 4
VCC = 6 V
RT = 5.1 k
TA = 25°C
VO(min)
VO(max)
1.9
1.8
1.7
1.6
1.4
1.3
1.2
1.1
0.9
0.8
0.7
0.6
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