TL594
V
Output Control
13
CC
8
9
6
5
D
Q
Q
Q1
Q2
Oscillator
Flip−
Flop
R
T
C
Deadtime
Comparator
T
11
10
Ck
−
+
≈ 0.12V
≈ 0.7V
4
Deadtime
Control
−
+
12
−
V
CC
+
4.9V
PWM
Comparator
0.7mA
UV
Lockout
Reference
Regulator
−
+
+
−
+
2
−
1
3.5V
1
2
3
15
16
14
7
Gnd
Error Amp
1
Feedback PWM
Comparator Input
Error Amp
2
Ref.
Output
This device contains 46 active transistors.
Figure 1. Representative Block Diagram
Capacitor C
T
Feedback/PWM Comp.
Deadtime Control
Flip−Flop
Clock Input
Flip−Flop
Q
Flip−Flop
Q
Output Q1
Emitter
Output Q2
Emitter
Output
Control
Figure 2. Timing Diagram
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4