UQQ-3.3/25-Q48NB-C Murata Power Solutions Inc, UQQ-3.3/25-Q48NB-C Datasheet - Page 18

• Manufacturer Part Number: UQQ-3.3/25-Q48NB-C
• Description: CONV DC/DC 82.5W 25A 3.3V T/H
• Manufacturer: Murata Power Solutions Inc
• Series: UQQr
• Type: Isolatedr

Specifications of UQQ-3.3/25-Q48NB-C

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 82W
• Mounting Type: Through Hole
• Voltage - Input: 18 ~ 75V
• Package / Case: 8-DIP Module, 1/4 Brick
• 1st Output: 3.3 VDC @ 25A
• Size / Dimension: 2.22" L x 1.45" W x 0.50" H (56.4mm x 36.8mm x 12.7mm)
• Power (watts) - Rated: 82.5W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 88%
• Approvals: CSA, cUL, EN, UL
• Output Type: Quarter-Brick
• No. Of Output Channels: 1
• Input Voltage: 18V To 75V
• Power Rating: 82.5W
• Output Voltage: 3.3V
• Output Current: 25A
• Supply Voltage: 48V
• Dc / Dc Converter Case: RoHS Compliant
• Dc / Dc Converter O/p Type: Quarter-Brick
• No. Of Outputs: 1
• Rohs Compliant: Yes
• Product: Isolated
• Output Power: 83 W
• Input Voltage Range: 18 V to 75 V
• Input Voltage (nominal): 48 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 25 A
• Isolation Voltage: 2.25 KV
• Package / Case Size: Quarter Brick
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: Details
• Other names: 811-1891-5

Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Figure 10. Vertical Wind Tunnel
www.murata-ps.com/locations
temperature gauges and no-contact IR camera mean that power supplies are
tested in real-world conditions.
gradients on each side. The adjustable heating element and fan, built-in
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.
Wide Input Range Single Output DC/DC Converters
Both sides of the UUT are studied since there are different thermal
from others, possibly causing uneven overheating.
turbulence removes more heat from some surfaces and less heat
Vertical Wind Tunnel
Murata Power Solutions employs a custom-designed enclosed
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 can watch thermal characteristics of the Unit
Under Test (UUT) with both dynamic loads and static steady-
state conditions. A special optical port is used which is transpar-
ent to infrared wavelengths. The computer fi les from the IR
camera can be studied for later analysis.
Both through-hole and surface mount converters are soldered
down to a host carrier board for realistic heat absorption 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 both adjustable 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 airfl ow collimator mixes the heat from the heating element
to make uniform temperature distribution. The collimator also
reduces the amount of turbulence adjacent to the UUT by restor-
ing laminar airfl ow. Such turbulence can change the effective
heat transfer characteristics and give false readings. Excess
25 Mar 2011 MDC_UQQ.B01 Page 18 of 18
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UQQ Series
© 2011 Murata Power Solutions, Inc.