Datasheet

Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these converters. These specifi cations vary depending on the solder type. Exceeding these specifi ca-
tions may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders: For Sn/Pb based solders:
Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C.
Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C.
Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds
Figure 6. 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
airfl ow and heat dissipation analysis of power products.
The system includes a precision low fl 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 sol-
dered down to a host carrier board for realistic heat absorp-
tion and spreading. Both longitudinal and transverse airfl ow
studies are possible by rotation of this carrier board since
there are often signifi cant differences in the heat dissipation
in the two airfl ow directions. The combination of adjust-
able airfl 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 airfl ow turbulence. Such turbulence
infl 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 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.
UWQ-12/17-Q48 Series
Wide Input, Isolated DOSA Quarter Brick DC/DC Converters
MDC_UWQ-12/17-Q48 Series.A06 Page 17 of 17
www.murata-ps.com/support
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. Specifi cations are subject to change without
notice. © 2013 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, 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/