TL1451A_15 Datasheet, PDF (20/36 Pages) Texas Instruments – DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL1451A
ą
DUAL PULSEĆWIDTHĆMODULATION CONTROL CIRCUITS
ą
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
OUTPUT TRANSISTOR ON DUTY CYCLE
vs
DEAD-TIME INPUT VOLTAGE
0
VCC = 3.6 V
10 _{RT = 10kΩ}
CT = 330 pF
20
STANDBY CURRENT
vs
SUPPLY VOLTAGE
TA = 25°C
2
1.75
30
1.5
40
1.25
50
1
60
0.75
70
80
90
0.5
ÁÁÁÁ _0.25
100
0 0.5 1 1.5 2 2.5 3 3.5 4
Dead-Time Input Voltage – V
0
0
10
20
30
40
VCC – Supply Voltage – V
Figure 24
Figure 25
2
1.75
1.5
1.25
1
0.75
ÁÁÁÁ _0.5
0.25
0
–25
STANDBY CURRENT
vs
FREE-AIR TEMPERATURE
Average Supply Current
VCC = 6 V, RT = 10 kΩ,
CT = 330 pF
Stand-By Current, VCC = 40 V, No Load
Stand-By Current, VCC = 3.6 V, No Load
0
25
50
75
100
TA – Free-Air Temperature – °C
Figure 26
MAXIMUM CONTINUOUS POWER DISSIPATION
vs
FREE-AIR TEMPERATURE
1200
1100
1000
900
800
16-Pin N Plastic Dip
Thermal Resistance
125°C/W
700
600
16-Pin NS Plastic SO
500
400
300
Thermal Resistance
250°C/W
200
100
0
–25
0
25
50
75
100
TA – Free-Air Temperature
Figure 27
20
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