LNK302/304-306
BYPASS
(BP)
DRAIN
(D)
REGULATOR
5.8 V
BYPASS PIN
UNDER-VOLTAGE
+
-
5.8 V
4.85 V
CURRENT LIMIT
COMPARATOR
6.3 V
+
-
V
ILIMIT
JITTER
CLOCK
DCMAX
THERMAL
SHUTDOWN
OSCILLATOR
FEEDBACK
1.65 V -VT
(FB)
S
R
Q
Q
LEADING
EDGE
BLANKING
SOURCE
(S)
PI-3904-020805
Figure 2a. Functional Block Diagram (LNK302).
DRAIN
(D)
BYPASS
(BP)
REGULATOR
5.8 V
FAULT
PRESENT
AUTO-
RESTART
COUNTER
BYPASS PIN
UNDER-VOLTAGE
+
CLOCK
RESET
5.8 V
4.85 V
-
CURRENT LIMIT
COMPARATOR
6.3 V
+
-
V
ILIMIT
JITTER
CLOCK
DCMAX
THERMAL
SHUTDOWN
OSCILLATOR
FEEDBACK
(FB)
1.65 V -VT
S
R
Q
Q
LEADING
EDGE
BLANKING
SOURCE
(S)
PI-2367-021105
Figure 2b. Functional Block Diagram (LNK304-306).
22-2
Rev. I 11/08