TL1454A_14 Datasheet, PDF (14/25 Pages) Texas Instruments – DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

TL1454A, TL1454AY
DUALĆCHANNEL PULSEĆWIDTHĆMODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A− MAY 2002 − REVISED SEPTEMBER 2002
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
1.04
0
50
100
TA − Free-Air Temperature − °C
Figure 10
SCP THRESHOLD VOLTAGE
vs
FREE-AIR TEMPERATURE
VCC = 6 V
1.02
0
0
5
10
15
20
25
SCP Capacitance − µF
Figure 11
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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