LNK302/304-306
BYPASS
(BP)
DRAIN
(D)
REGULATOR
5.8 V
BYPASS PIN
UNDERVOLTAGE
+
-
5.8 V
4.85 V
CURRENT LIMIT
COMPARATOR
+
6.3 V
-
V
ILIMIT
JITTER
CLOCK
DCMAX
THERMAL
SHUTDOWN
FEEDBACK
(FB)
OSCILLATOR
1.65 V -VT
S
Q
Q
R
LEADING
EDGE
BLANKING
SOURCE
(S)
PI-3904-032213
Figure 2a. Functional Block Diagram (LNK302).
BYPASS
(BP)
DRAIN
(D)
REGULATOR
5.8 V
FAULT
PRESENT
AUTO-
RESTART
BYPASS PIN
UNDERVOLTAGE
COUNTER
6.3 V
+
-
CLOCK
5.8 V
4.85 V
CURRENT LIMIT
COMPARATOR
RESET
+
-
V
ILIMIT
JITTER
CLOCK
DCMAX
THERMAL
SHUTDOWN
FEEDBACK
(FB)
OSCILLATOR
1.65 V -VT
S
Q
Q
R
LEADING
EDGE
BLANKING
SOURCE
(S)
PI-2367-032213
Figure 2b. Functional Block Diagram (LNK304-306).
2
Rev. J 06/13
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