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MIC2870YFT データシート(PDF) 21 Page - Micrel Semiconductor

部品番号 MIC2870YFT
部品情報  1.5A Synchronous Boost Flash LED Driver with I2C Interface
PDF  25 Pages
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メーカー  MICREL [Micrel Semiconductor]
ホームページ  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2870YFT データシート(HTML) 21 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2870
September 5, 2013
21
Revision 1.0
Figure 5. Graph to Determine PC Board Area for a Given
PCB Thermal Resistance
Figure 5 shows the total area of a round or square pad,
centered on the device. The solid trace represents the
area of a square, single sided, horizontal, solder masked,
copper PC board trace heat sink, measured in square
millimeters. No airflow is assumed. The dashed line
shows PC boards trace heat sink covered in black oil-
based paint and with 1.3m/sec (250 feet per minute)
airflow. This approaches a “best case” pad heat sink.
Conservative design dictates using the solid trace data,
which indicates that a maximum pad size of 5000 mm
2 is
needed. This is a pad 71mm × 71mm (2.8 inches per
side).



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