NCP1215A ON Semiconductor, NCP1215A Datasheet - Page 12

• Manufacturer Part Number: NCP1215A
• Description: Low Cost Variable OFF Time Switched Mode Power Supply Controller
• Manufacturer: ON Semiconductor

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