TL494 Datasheet, PDF (7/12 Pages) Motorola, Inc – SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

Figure 10. Error–Amplifier Characteristics
TL494
Figure 11. Deadtime and Feedback Control Circuit
Vin
Vref
Error Amplifier
+ Under Test
–
+
–
Other Error
Amplifier
Feedback
Terminal
(Pin 3)
Test
Inputs
50k
VCC = 15V
VCC
Deadtime
Feedback
RT
CT
(+)
(–) _Error
(+)
(–)
Output
Control
Gnd
150 150
2W 2W
C1
Output 1
E1
C2
Output 2
E2
Ref
Out
Figure 12. Common–Emitter Configuration
Test Circuit and Waveform
15V
Each
Output
Transistor
C
Q
E
RL
68
VC
CL
15pF
90%
VCC
10%
tr
90%
10%
tf
Figure 13. Emitter–Follower Configuration
Test Circuit and Waveform
Each
Output
Transistor
15V
C
Q
E
RL
68
VEE
CL
15pF
90%
10%
Gnd
tr
90%
VEE
10%
tf
MOTOROLA ANALOG IC DEVICE DATA
7