TL1451A_15 Datasheet, PDF (9/36 Pages) Texas Instruments – DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

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TL1451A
DUAL PULSEĆWIDTHĆMODULATION CONTROL CIRCUITS
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SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
total device
PARAMETER
Standby supply current
Average supply current
† _{All typical values are at TA = 25°C unless otherwise indicated.}
TEST CONDITIONS
Off-state
RT = 10 kΩ
TL1451AQ, TL1451AM
MIN TYP^† MAX
1.3 1.8
1.7 2.4
UNIT
mA
mA
PARAMETER MEASUREMENT INFORMATION
S1
CPE
0.47 µF
Test
Input VCC = 5 V
RL
4.7 kΩ
RL
16 15 14 13 12 11 10 9
4.7 kΩ
OUT1
OUT2
TL1451A
12 3 4 5 6 7 8
Oscillator Triangle Waveform
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
PWM Comparator Output Voltage
CT
330 pF
RT
10 kΩ
Test
Input
Figure 1. Test Circuit
Output Transistor Collector
Waveform
Protection Enable
Terminal Waveform
Short-Circuit Protection
Comparator Output
Power Supply Voltage
2.8 V TYP
† _{Protection Enable Time, tpe = (0.051 x 106 x Cpe) in seconds}
Figure 2. TL1451A Timing Diagram
2.0 V
1.6 V
1.4 V
1.25 V
H
L
Dead Time 100%
H
L
tpe^†
0.6 V
0V
H
L
3.6 V
0V
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