UWS-5/10-Q48PM-C【PDF 25/25 页】DC/DC CONVERTER 5V 10A ISOLATED

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UWS Series

Sixteenth-brick DOSA-Compatible,

Wide Input Isolated DC-DC Converters

Vertical Wind Tunnel

Murata Power Solutions employs a computer controlled custom-

designed closed loop vertical wind tunnel, infrared video camera sys-

tem, and test instrumentation for accurate air?ow and heat dissipa-

IR Transparent

tion analysis of power products. The system includes a precision low

optical window

Unit under

Variable

speed fan

?ow-rate anemometer, variable speed fan, power supply input and

load controls, temperature gauges, and adjustable heating element.

IR Video

Camera

test (UUT)

Heating

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 air?ow studies are

possible by rotation of this carrier board since there are often signi?-

Precision

low-rate

anemometer

3” below UUT

Ambient

temperature

sensor

Air?ow

collimator

element

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 turbulence 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 and fan, built-in

temperature gauges, and no-contact IR camera mean that power supplies

are tested in real-world conditions.

Figure 8. Vertical Wind Tunnel

Through-hole Soldering Guidelines

Murata Power Solutions recommends the TH soldering speci?cations below when install-

ing these converters. These speci?cations vary depending on the solder type. Exceeding

these speci?cations 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:

SMT Re?ow Soldering Guidelines

The surface-mount re?ow solder pro?le shown below is suitable for SAC305 type lead-

free solders. This graph should be used only as a guideline . Many other factors in?uence

the success of SMT re?ow soldering. Since your production environment may differ,

please thoroughly review these guidelines with your process engineers.

Maximum Preheat Temperature

Maximum Pot Temperature

Maximum Solder Dwell Time

For Sn/Pb based solders:

Maximum Preheat Temperature

Maximum Pot Temperature

Maximum Solder Dwell Time

115° C.

270° C.

7 seconds

105° C.

250° C.

6 seconds

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mans?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/

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_UWS Series.C03 Page 25 of 25

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