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

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© 2022 Murata Power Solutions, Inc.

Murata Power Solutions, Inc.

129 Flanders Rd, Westborough, MA 01581 USA

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: https://www.murata-ps.com/requirements/

SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 25 of 25

DSQ/DAQ/DCQ Series

600W Quarter Brick

DOSA Digital PMBus Interface

Figure 16. 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

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.

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 10" x 10" 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 dissipa-

tion 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 measure-

ment 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 different ther-

mal 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.