TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005
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PARAMETER MEASUREMENT INFORMATION
V
CC
= 15 V
150
Ω
2W
C1
E1
C2
E2
8
9
11
10
Output 2
150
Ω
2W
Output 1
12
V
CC
4
Test
Inputs
12 kΩ
3
6
5
0.01
µF
1
2
16
15
13
DTC
FEEDBACK
RT
CT
1IN+
1IN−
2IN+
2IN−
Error
Amplifiers
OUTPUT
CTRL
GND
7
REF
14
50 kΩ
TEST CIRCUIT
Voltage
at C1
Voltage
at C2
V
CC
0V
V
CC
0V
Voltage
at CT
Threshold Voltage
DTC
0V
Threshold Voltage
FEEDBACK
0.7 V
Duty Cycle
0%
MAX
VOLTAGE WAVEFORMS
0%
Figure 1. Operational Test Circuit and Waveforms
6