ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
Vertical Wind Tunnel
Murata Power Solutions employs a computer controlled
custom-designed closed loop vertical wind tunnel, infrared
video camera system, and test instrumentation for accurate
IR Transparent
optical window
IR Video
Camera
Unit under
test (UUT)
Variable
speed fan
air?ow and heat dissipation analysis of power products.
The system includes a precision low ?ow-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
soldered down to a host carrier board for realistic heat
Precision
low-rate
anemometer
3” below UUT
Ambient
temperature
sensor
Air?ow
collimator
Heating
element
absorption and spreading. Both longitudinal and transverse
air?ow studies are possible by rotation of this carrier board
since there are often signi?cant differences in the heat
dissipation in the two air?ow directions. The combination of
adjustable air?ow, adjustable ambient heat, and adjustable
Input/Output currents and voltages mean that a very wide
range of measurement conditions can be studied.
The collimator reduces the amount of turbulence adjacent
to the UUT by minimizing air?ow turbulence. Such turbu-
lence in?uences 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 different
thermal gradients on each side. The adjustable heating element
Figure 10. Vertical Wind Tunnel
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mans?eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
and fan, built-in temperature gauges, and no-contact IR camera mean
that power supplies are tested in real-world conditions.
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/
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. Speci?cations are subject to change without
notice.
? 2013 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_ULS-30W_C06 Page 30 of 30
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