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AN3981 bảng dữ liệu(PDF) 52 Page - STMicroelectronics

tên linh kiện AN3981
Giải thích chi tiết về linh kiện  LED array drivers
PDF  54 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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AN3981 bảng dữ liệu(HTML) 52 Page - STMicroelectronics

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PCB layout guidelines
AN3981
52/54
Doc ID 022217 Rev 1
Figure 63.
Digital signal quality
Other recommendations involve the position of the devices on the application board
compared to the LED arrangements. Some precautions should be considered (avoiding too
long wires or traces, tortuous paths, careful clock distribution, etc.), although there are often
also restrictions due to the application itself (e.g. shape of the board, particular LED
arrangement, etc.).
Finally, for correct power dissipation and to prevent overheating of the device, it is very
important to properly solder the exposed pad of the package (if present in the selected
package) to the dedicated copper pad, following the indications (in terms of size) provided
for that kind of package.
AM10663v1
poor signal
good signal
CLK, LE, etc.
CLK, LE, etc.
Proper filtering to
improve digital
signals quality



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