UEI25 查看數據表（PDF） - Murata Manufacturing

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UEI25

Single Output Isolated 25-Watt DC/DC Converters

Murata Manufacturing 

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Figure 7. Vertical Wind Tunnel

UEI25 Series

Single Output Isolated 25-Watt DC/DC Converters

Vertical Wind Tunnel

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Murata Power Solutions employs a custom-designed enclosed

vertical wind tunnel, infrared video camera system and test

instrumentation for accurate airflow and heat dissipation

analysis of power products. The system includes a precision low

flow-rate anemometer, variable speed fan, power supply input

and load controls, temperature gauges and adjustable heating

element.

The IR camera can watch thermal characteristics of the Unit

Under Test (UUT) with both dynamic loads and static steady-

state conditions. A special optical port is used which is transpar-

ent to infrared wavelengths. The computer files from the IR

camera can be studied for later analysis.

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Both through-hole and surface mount converters are soldered

down to a host carrier board for realistic heat absorption and

spreading. Both longitudinal and transverse airflow studies are

possible by rotation of this carrier board since there are often

significant differences in the heat dissipation in the two airflow

directions. The combination of both adjustable airflow, adjustable

ambient heat and adjustable Input/Output currents and voltages

mean that a very wide range of measurement conditions can be

studied.

The airflow collimator mixes the heat from the heating ele-

ment to make uniform temperature distribution. The collimator

also reduces the amount of turbulence adjacent to the UUT by

restoring laminar airflow. Such turbulence can change the effec-

tive heat transfer characteristics and give false readings. Excess

turbulence removes more heat from some surfaces and less heat

from others, possibly causing uneven overheating.

Both sides of the UUT are studied since there are different thermal gradi-

ents on each side. The adjustable heating element and fan, built-in tempera-

ture gauges and no-contact IR camera mean that power supplies are tested in

real-world conditions.

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.

ISO 9001 and 14001 REGISTERED

Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without

notice.

© 2011 Murata Power Solutions, Inc.

www.murata-ps.com/support

MDC_UEI25W.B03 Page 23 of 23

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