AP3983B/C/D
Typical Applications Circuit
F1
L1
C6 R8
D7,D8
C7 C8 R9
Vo+
L2
R4
R3
C5
Np
+
+
D1 to D4
R1
R2
J1
AC 90-264V
+
+
C1
C2
D5
Vo-
R7
Ns
T1
D6
+
C3
Nfb
CY1
3
VCC
U1
5,6
D
R6
1
C4
7
2
CPC GND
FB
CS
4
C9
R5
R12
R13
For AP3983B/C/D (12V/1.5A)
Item
Function
QTY
2
Item
U1
Function
QTY
1
C1, C2
C3
15µF/400V, electrolytic
4.7µF/50V, electrolytic
10nF, ceramic, 0805
1nF/250V, ceramic
1nF/100V, 0805
AP3983D, PDIP-7
2M, 1206
1
R1, R2
R3
2
C4
1
1
200, 1206
C5
1
R4
1
150k, 1206
22k, 1%, 0805
47k, 1%, 0805
2, 1206
C6
1
R5
1
C7, C8
C9
1000µF/16V, electrolytic
10pF/16V, 0805
2
R6
1
1
R7
1
CY1
D1 to D6
D7, D8
F1
1
R8
1
1nF/250VAC, Y1 capacitor
1N4007, rectifier diode
MBR3100, Schottky diode
2A/250V, fuse
30, 1206
6
R9
1
5.1k,1206
2
R12
R13
T1
1
1.2, 1%, 1206
1.8, 1%, 1206
1
1
L1
30mH, Common inductor, EE9.8
250µH/2A, Common inductor
1
EE20 core, PC40, transformer
1
L2
1
–
–
–
Pin Descriptions
Pin Number
Pin Name
Function
1
2
CPC
FB
This pin connects a capacitor to GND for output cable compensation
The voltage feedback from auxiliary winding
3
VCC
CS
This pin receives rectified voltage from the auxiliary winding of the transformer
Current sense for primary side of transformer
4
5, 6
7
D
This pin is connected with an internal power MOSFET’s drain
This pin is the signal reference ground
GND
2 of 13
www.diodes.com
July 2016
© Diodes Incorporated
AP3983B/C/D
Document number: DS36784 Rev. 4 - 2