TL594
PULSE WIDTH MODULATION CONTROL CIRCUIT
SLVS052F − APRIL 1988 − REVISED NOVEMBER 2003
PARAMETER MEASUREMENT INFORMATION
VCC = 15 V
150
Ω
2W
C1
E1
C2
E2
8
9
11
10
Output 2
150
Ω
2W
Output 1
12
VCC
4
Test
Inputs
12 kΩ
3
6
5
0.01
µF
1
2
DTC
FEEDBACK
TL594
RT
CT
IN+
IN−
16 IN+
15 IN−
Error
Amplifiers
13 OUTPUT
CTRL
50 kΩ
GND
7
REF
14
TEST CIRCUIT
Voltage
at C1
VCC
0V
VCC
0V
Voltage
at C2
Voltage
at CT
Threshold Voltage
DTC Input
0V
Threshold Voltage
Feedback
Input
0.7 V
Duty Cycle
0%
VOLTAGE WAVEFORMS
MAX
0%
Figure 2. Operational Test Circuit and Waveforms
8
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265