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AN1889 Datasheet(PDF) 30 Page - STMicroelectronics

Part # AN1889
Description  The need to choose a high value of the fly-back voltage
PDF  33 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1889 Datasheet(HTML) 30 Page - STMicroelectronics

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PCB layout and list of materials
AN1889
30/33
10
PCB layout and list of materials
The printed circuit board is reported in Figure 22, while the relevant bill of material is listed in
Table 4.
Figure 22.
PCB layout
Table 4.
Bill of material
R1
39 k
Ω-2 W
R2
33 k
Ω-2 W
R3
56 k
Ω-2 W
R4
56 k
Ω-2 W
R5
56 k
Ω-2 W
R6
56 k
Ω-0.5 W
R7
0.56
Ω-0.5 W
R8
0
Ω
R9
1 k
Ω 0.5 W
R10
150 k
Ω
R11
0
Ω
R12
22 k
Ω-0.25 W 1%
R13
3.9 k
Ω-0.25 W 1%
R14
NC
R15
2.2 k
Ω-0.25 W
R16
1 k
Ω-0.25 W



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