Operation description
VIPer20A-E
Figure 17. Mixed soft start and compensation
D2
Figure 18. Latched shut down
VIPer20
VDD
OSC
13V
DRAIN
D3
R1
VDD
VIPer20
DRAIN
-
+
COMP
SOURCE
R3
D1
Q2
OSC
13V
-
+
COMP SOURCE
AUXILIARY
WINDING
R2
R3
R2
C4
R1
R4
Shutdown
+ C3
C1
+ C2
Q1
D1
FC00431
FC00440
Figure 19. Typical compensation network
VIPer20
VDD
OSC
13V
DRAIN
Figure 20. Slope compensation
-
+
COMP SOURCE
R2
R1
VIPer20
VDD
OSC
13V
DRAIN
-
+
COMP SOURCE
C2
R1
C1
C1
Q1
C2
C3
R3
FC00451
FC00461
Figure 21. External clock sinchronisation
Figure 22. Current limitation circuit example
VIPer20
VDD
DRAIN
VIPer20
VDD
OSC
DRAIN
OSC
13V
-
+
COMP
SOURCE
-
13V
+
COMP SOURCE
10 k鈩?/div>
R1
Q1
FC00470
R2
FC00480
20/34
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