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UWR14-20WA-SERIES Datasheet, PDF (4/6 Pages) Murata Manufacturing Co., Ltd. – Single Output, High Reliability | |||
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UWR Series
Input Fusing
Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL A-Series
UWR 14-20 Watt DC/DC Converters, you should use slow-blow type fuses
with values no greater than the following:
VIN Range
D5A
D12A
D48A/D48E
Fuse Value
6A
4A
2A
On/Off Control
The On/Off Control pin (pin 4) may be used for remote on/off operation. A
TTL logic high (+2 to +5 Volts, 250μA max.) applied to pin 4 disables the
converter. A TTL logic low (0 to +0.8 Volts, 70μA max.), or no connection,
enables the converter. Control voltages should be referenced to pin 2
(âInput). Applying a voltage to the Control pin when no input power is
applied to the converter can cause permanent damage to the converter.
1 +INPUT
2
âINPUT
+OUTPUT 6
TRIM 8
20k7
5-10
TURNS
LOAD
COMMON 7
Figure 2a. Trim Connections Using a Trimpot
Output Trimming
VOUT may be trimmed ±5% via a single external trimpot or ï¬xed resistor.
The trimpot should be connected as shown in Figure 2a with its wiper
connected to pin 8 (Trim). A trimpot can be used to determine the value
of a single ï¬xed resistor which should be connected as shown in Figure
2b. Connect the resistor between pin 8 (Trim) and pin 6 (+Output) to trim
"down" the output voltage. Connect the resistor between pins 8 and 7
(Common) to trim "up" the output voltage. Fixed resistors should be metal-
ï¬lm types with absolute TCRâs less than 100ppm/°C to ensure stability.
Custom Capabilities
DATELâs world-class design, development and manufacturing team stands
ready to work with you to deliver the exact power converter you need for
your demanding, large volume, OEM applications. More importantly . . .
weâll do it on time and within budget!
Our experienced applications and design staffs; quick-turn prototype
capability; highly automated, SMT assembly facilities; and in-line SPC
quality-control techniques combine to give us the unique ability to design
and deliver any quantity of power converters to the highest standards of
quality and reliability.
We have compiled a large library of DC/DC designs that are currently used
in a variety of telecom, medical, computer, railway, aerospace and industrial
applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-effec-
tive power converters available.
1 +INPUT
2
âINPUT
+OUTPUT 6
8
TRIM
7
COMMON
Trim
Down
LOAD
Trim Up
Figure 2b. Trim Connections Using Fixed Resistors
Soldering Guidelines
Murata Power Solutions recommends the speciï¬cations below when installing these
converters. These speciï¬cations vary depending on the solder type. Exceeding these
speciï¬cations may cause damage to the product. Be cautious when there is high atmo-
spheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). 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:
Maximum Preheat Temperature
115° C.
Maximum Pot Temperature
270° C.
Maximum Solder Dwell Time
7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature
105° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
6 seconds
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDC_UWR14-20 Series.B02 Page 4 of 6
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