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TL494 Datasheet(PDF) 5 Page - ON Semiconductor

Part # TL494
Description  Switch mode Pulse Width Modulation Control Circuit
PDF  14 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

TL494 Datasheet(HTML) 5 Page - ON Semiconductor

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TL494, NCV494
www.onsemi.com
5
Figure 1. Representative Block Diagram
Figure 2. Timing Diagram
6
RT
CT
5
4
Deadtime
Control
Oscillator
0.12V
0.7V
0.7mA
+
1
-
-
+
-
+
+
2
-
D
Q
Ck
-
+
+
-
3.5V
4.9V
13
Reference
Regulator
Q1
Q2
8
9
11
10
12
VCC
VCC
12
3
15
16
14
7
Error Amp
1
Feedback PWM
Comparator Input
Ref.
Output
Gnd
UV
Lockout
Flip-
Flop
Output Control
Error Amp
2
Deadtime
Comparator
PWM
Comparator
Q
Capacitor CT
Feedback/PWM Comp.
Deadtime Control
Flip-Flop
Clock Input
Flip-Flop
Q
Flip-Flop
Q
Output Q1
Emitter
Output Q2
Emitter
Output
Control
This device contains 46 active transistors.



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