Datasheet

NCP1028
http://onsemi.com
3
V
CC
Vclamp
+
-
V
CC
Mngt
Fault
UVLOs
4 V rst
V
DD
IC1
GND
20 ms RC
S
Q
Q
R
LEB
Timer
Ip Flag
+
-
V
CC
< 4 V
Reset
IBO
+
VBO
65 kHz or
100 kHz
CLOCK
S
Q
Q
R
Jittering
V
dd
BO
Ramp
Comp.
+
25%
of lp
+
-
V
dd
RFB
FB
Skip
+
-
Soft-Start
Ip Flag
+
-
OPP
V
cc
Drain
UVLO
Figure 2. Internal Block Diagram
+
Vlatch
Icomp
Max Ip Selection
Over Power
Protection Input
Ramp Compensation