Dual Output Off-Line Non-isolated Fly-back Power Solution
AP3917B 12V/20mA+3.8V20mA EV3 Board User
’s Guide
AP3917B EV3 Page 4 of 17 06-21-2019
Rev 1.0 www.diodes.com
Chapter3 Schematic and bill of material
3.1 Schematic
Fig. 3-1, Evaluation Board Schematic
3.2 Bill of Material
Table 3-1, bill of material
Item
Designator
Description
Footprint
Qty.
Manufacturer
1
F1
8.2R, fusible resistor
Φ3*10mm
1
OAHE
2
BD1
ABS10A, bridge diode
SOPA-4
1
Diodes
3
C1
2.2uF/400V, electrolytic capacitor
Φ6*9mm
1
Aishi
4
C2
2.2uF/25V, X7R
SMD 0805
1
Telesky
5
C3
100uF/16V, electrolytic capacitor
Φ6*7mm
1
Aishi
6
C4
10uF/16V, X7R
SMD 0805
1
Telesky
7
C5
22uF/16V, electrolytic capacitor
Φ5*10mm
1
Telesky
8
C6
470pF/500V, X7R
SMD 0805
1
Telesky
9
C7
470pF/50V, X7R
SMD 0805
1
Telesky
10
D1
S1MWF-7, slow type diode, mark
F9
SOD123-FL
1
Diodes
11
D2
ES1J, 1A/600V, Trr 35ns
SMA
1
Diodes
12
D3
APD260, Schottky diode, 2A/60V
DO-41
1
Diodes
13
L1
2.2mH,choke inductor
DIP, 0406
1
Deloop
14
T1
EE8.3, Horizontal
DIP, 3+3Pin,
Horizontal
1
Deloop
15
R1
24.7k, thick film
SMD 0805, 1%
1
Panasonic
16
R2
13.0k, thick film
SMD 0805, 1%
1
Panasonic
17
R3
330k, thick film
SMD 0805, 5%
1
Panasonic
18
R4
27k, thick film
SMD 0805, 5%
1
Panasonic
19
U1
AP3917B
SO-7
1
Diodes
total
19pcs
R3
D1
C6
C7
BD1
F1
C1
C2
L1
L
T1
R1
R4
D2
N
U1
D3
C4
C5
C3
Source
Source
VCC
Drain
FB
12V-
/3.8V-
3.8V+
12V+
R2