OKL2-T/20-W5 Series
Programmable Output 20-Amp iLGA SMT PoL
DC-DC Converter Series
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
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.
IR Transparent
optical window
Variable
speed fan
Unit under
test (UUT)
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.
IR Video
Camera
Both through-hole and surface mount converters are
soldered down to a 10" x 10" host carrier board for realistic
heat absorption and spreading. Both longitudinal and trans-
verse 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 measurement conditions can be studied.
Heating
element
Precision
low-rate
anemometer
3” below UUT
The collimator reduces the amount of turbulence adjacent
to the UUT by minimizing airflow turbulence. Such turbu-
lence 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.
Ambient
temperature
sensor
Airflow
collimator
Both sides of the UUT are studied since there are different
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 conditions.
Figure 9. Vertical Wind Tunnel
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.
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.
© 2016 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_OKL2-T/20-W5.B02 Page 17 of 17
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