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LH10-10B12 Datasheet(PDF) 9 Page - MORNSUN Science& Technology Ltd.

Part # LH10-10B12
Description  5-25W, AC-DC CONVERTER
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Manufacturer  MORNSUN [MORNSUN Science& Technology Ltd.]
Direct Link  http://www.mornsun-power.com
Logo MORNSUN - MORNSUN Science& Technology Ltd.

LH10-10B12 Datasheet(HTML) 9 Page - MORNSUN Science& Technology Ltd.

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suggestions for handling dissipated heat are summarized, below:
(1)
Ambient Air Cooling
For miniature and high power density converters, free air cooling is recommended, mainly due
to cost and space concerns.
♦ Heat dissipates to the ambient air through the converter case or exposed surfaces. Heat
may also dissipate to ambient air if there is a gap between the converter and the PCB.
♦ Heat dissipates from the converter case and exposed surfaces to PCB by radiation.
♦ Heat conducts through terminals (pins) to PCB.
In such applications, please pay particular attention to:
A. Air Flow - Because the heat dissipation is mainly through convection and radiation, the
converter needs an environment with good air flow.
It may be helpful to design heat
dissipation venting holes throughout the end product, near the converter
’s location. For
best convection cooling, ensure that air flow is not blocked by large components
B. Layout of Heat Generating Components - In most applications, the AC/DC converter is
usually not the only heat generating component.
It is recommended to keep a good
distance between each heat generating component to minimize heat dissipating clusters.
C. PCB Design - The PCB, which the power converter is assembled on, is not only a base to
mount the converter, but also acts as a heat sink for it, therefore heat dissipation should be
considered in PCB layout.
We recommend extended the area of the main copper loop
and decrease the component density on the PCB to improve the ambient environment.
(2) Heat Sinks
When free air convection is not sufficient enough, we recommend the use of a heat sink for
further cooling. As the converters are filled with heat conductive silicon or epoxy, the heat
distribution in converter is even and it radiates from the converter to the air.
The efficiency of
this convection is dependent on the size of the surface area of the converter.
The use of heat
sinks is a practical method to add surface area and improve the convection.
There are many
kinds of heat sinks available in the market.
MORNSUN recommends considering the following
factors in selecting a heat sink:


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