TL494_10 Datasheet, PDF (8/14 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

V_in
V_ref
TL494, NCV494
Error Amplifier
+ Under Test
−
+
−
Other Error
Amplifier
Feedback
Terminal
(Pin 3)
Test
Inputs
50k
V_CC = 15V
150 150
2W 2W
V_CC
Deadtime
C1
Output 1
E1
Feedback
R_T
C2
Output 2
C_T
E2
(+)
(−) _Error
(+)
(−)
Output
Ref
Control
Out
Gnd
Figure 10. Error−Amplifier Characteristics
Each
Output
Transistor
15V
C
Q
E
R_L
68
V_C
C_L
15pF
Figure 11. Deadtime and Feedback Control Circuit
Each
Output
Transistor
15V
C
Q
E
R_L
68
V_EE
C_L
15pF
90%
V_CC
10%
t_r
90%
10%
t_f
Figure 12. Common−Emitter Configuration
Test Circuit and Waveform
90%
10%
Gnd
t_r
90%
V_EE
10%
t_f
Figure 13. Emitter−Follower Configuration
Test Circuit and Waveform
http://onsemi.com
8