TL1454CPW Datasheet, PDF (14/25 Pages) Texas Instruments – DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

TL1454, TL1454Y
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS086B – APRIL 1995 – REVISED NOVEMBER 1997
TYPICAL CHARACTERISTICS
DTC INPUT THRESHOLD VOLTAGE
vs
FREE-AIR TEMPERATURE
1.4
VCC = 6 V
RT = 5.1 kΩ
CT = 1000 pF
1.2
VIT (0% Duty Cycle)
1
0.8
SCP TIME-OUT PERIOD
vs
SCP CAPACITANCE
2
VCC = 6 V
TA = 25°C
1.5
1
0.5
0.6
VIT (100% Duty Cycle)
0.4
– 50
0
50
100
TA – Free-Air Temperature – °C
Figure 10
0
0
5
10
15
20
25
SCP Capacitance – µF
Figure 11
SCP THRESHOLD VOLTAGE
vs
FREE-AIR TEMPERATURE
1.04
VCC = 6 V
1.02
SCP LATCH RESET VOLTAGE
vs
FREE-AIR TEMPERATURE
3.5
VCC = 6 V
3
1
2.5
0.98
2
0.96
1.5
0.94
– 50
0
50
100
TA – Free-Air Temperature – °C
Figure 12
1
– 50 – 25
0
25
50
75 100
TA – Free-Air Temperature – °C
Figure 13
14
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