Datasheet
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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. © 2016 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
ULS 60-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MDC_ULS Series.C02 Page 24 of 24
Figure 10. Vertical Wind Tunnel
IR Video
Camera
IR Transparent
optical window
Variable
speed fan
Heating
element
Ambient
temperature
sensor
Airflow
collimator
Precision
low-rate
anemometer
3” below UUT
Unit under
test (UUT)
Vertical Wind Tunnel
Murata Power Solutions employs a computer controlled cus-
tom-designed closed loop 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 monitors the thermal performance of the
Unit Under Test (UUT) under static steady-state conditions. A
special optical port is used which is transparent to infrared
wavelengths.
Both through-hole and surface mount converters are sol-
dered down to a host carrier board for realistic heat absorp-
tion 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 adjustable
airflow, adjustable ambient heat, and adjustable Input/Output
currents and voltages mean that a very wide range of mea-
surement conditions can be studied.
The collimator reduces the amount of turbulence adjacent
to the UUT by minimizing airflow turbulence. Such turbulence
influences the effective heat transfer characteristics and gives
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 differ-
ent thermal gradients on each side. The adjustable heating
element and fan, built-in temperature gauges, and no-contact IR
camera mean that power supplies are tested in real-world condi-
tions.