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I
ref
1
BOK
+
−
50 mA
2
FB
+
1.92 V
3
−
CS
4
GND
20 k
+
V
ref
−
NCP1201
Oscillator
60 or 100 kHz Clock
Output
+
+
−
−
Skip Cycle
Comparator
80 K
1.07 V
+
+
Output
−
−
24 K
250 ns
L.E.B.
+
−
Output
57 k
25 k
0.9 V
Figure 2. Simplified Functional Block Diagram
http://onsemi.com
+
10.5 V/12.5 V
−
Maximum 83%
Duty Cycle
Set
Q
Reset
TSD
Startup
Blanking
Overload
3
8
+
HV Current
−
Source
Output
+
+
7
−
−
6
5
250 mA
Internal
V
Regulator
ref
HV
NC
V
CC
DRV
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