NCP1215A ON Semiconductor, NCP1215A Datasheet - Page 12
NCP1215A
Manufacturer Part Number
NCP1215A
Description
Low Cost Variable OFF Time Switched Mode Power Supply Controller
Manufacturer
ON Semiconductor
Datasheet
1.NCP1215A.pdf
(16 pages)
operation of the working adapter. The Channel 3 in
Figure 22 shows CT pin voltage at full output load. The
Channel 1 is a gate driver output.
Neutral
The following oscilloscope snapshots illustrate the
Line
J1
J2
1
1
Figure 22. CT Voltage at Full Load Condition
2
−
R1
2.7
11 k R2
S250
C3
C4
D1
2.2 mF/
400 V
+ 1
10 nF
56 pF
C1 +
1
2
3
4
2.2 mH
2.2 mF/
NCP1215A
IC1
400 V
FB
CT
CS
GND
L1
C2
+
Figure 21. Adaptor Application Schematic
Gate
NC1
NC2
V
R3
2M7
CC
2M7
R4
100 nF
8
7
6
5
X
X
http://onsemi.com
NCP1215A
C5
100 nF
R5
220
LL4448
D5
C6
12
47 k
R6
Figure 23.
MTD1N60
MURA160T3
The CT voltage at no load condition is depicted in
D8
47 k
500 V
1 nF/
R7
Figure 23. CT Voltage at No Load Condition
C7
Q1
PC817
ISO1
C8
4
3
1
2
T1
1 nF/Y
8
5
D9
MBRS360T3
470 mF/
16 V
C9
+
BZX84C5V6
R9
1 k
D7
R8
220
4.7 mH
L2
+6.5 V@
800 mA
+
GND
J3
J4
1
1
C10
10 mF/
16 V