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