UEI25-120 Datasheet PDF - Murata Manufacturing
| Part Number | UEI25-120 | |
| Description | Low-profile Open-frame DC-DC Converters | |
| Manufacturers | Murata Manufacturing | |
| Logo |  |
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www.murata-ps.com
UEI25-120 Serieswww.DataSheet4U.com
Single Output Isolated 25-Watt DC/DC Converters
Typical unit
FEATURES
Small footprint DC/DC converter, ideal for
high current applications
Industry standard 0.96" x 1.1" x 0.32" open
frame package and pinout
Input voltage range of 36-75 Vdc
12Vdc fixed output
Assembly and attachment for RoHS standards
Isolation up to 2250 VDC (basic)
Up to 25 Watts total output power with over-
temperature shutdown
High efficiency synchronous rectifier forward
topology
Stable operation with no required external
components
Usable -40 to 85°C temperature range (with
derating)
Meets UL 60950-1, CAN/CSA-C22.2 No. 60950-1,
IEC60950-1, EN60950-1 safety approvals (2nd
Edition)
Extensive self-protection shut down features
PRODUCT OVERVIEW
Featuring a full 25 Watt output in one square inch
of board area, the UEI25 series isolated DC/DC
converter family offers efficient regulated DC power
for printed circuit board mounting. The 0.96" x 1.1"
x 0.32" (24.38 x 27.94 x 8.13 mm) converter ac-
cepts a 2:1 input voltage range of 36 to 75 Volts DC,
ideal for telecom equipment. The industry-standard
pinout fits larger 1" x 2" converters. The fixed out-
put voltage is tightly regulated. Applications include
small instruments, area-limited microcontrollers,
data communications equipment, remote sensor
systems, telephone equipment, vehicle and portable
electronics.
The UEI25 series includes full magnetic and opti-
cal isolation with Basic protection up to 2250 Volts
DC. For powering digital systems, the outputs offer
fast settling to step transients and will accept higher
capacitive loads. Excellent ripple and noise speci-
fications assure compatibility to noise-susceptible
circuits. For systems requiring controlled startup/
shutdown, an external remote On/Off control may
use a switch, transistor or digital logic.
A wealth of self-protection features avoid both
converter and external circuit faults. These include
input undervoltage lockout and overtemperature
shutdown. The outputs current limit using the
“hiccup” autorestart technique and the outputs are
short-circuit protected. Additional features include
output overvoltage and reverse conduction elimina-
tion. The high efficiency offers minimal heat buildup
and “no fan” operation.
Contents
Description, Photograph, Connection Diagram
Ordering Guide, Model Numbering
Mechanical Specifications, Input/Output Pinout
UEI25-120-D48 Specifications and Performance Data
Application Notes
Page
1
2
3
4
8
F1 +Vin (1)
External
DC
Power
Source
On/Off
Control
(6)
Open = On
$MPTFE 0GG
1PTJUJWF
polarity)
-Vin (2)
For full details go to
www.murata-ps.com/rohs
*TPMBUJPO
Barrier
Controller
and Power
5SBOTGFS
t4XJUDIJOH
t'JMUFST
t$VSSFOU4FOTF
Reference and
Error Amplifier
Figure 1. Connection Diagram
Typical topology is shown. Murata Power Solutions
recommends an external fuse.
www.murata-ps.com
+Vout (3)
Trim (4)
-Vout (5)
email: [email protected]
23 Jun 2010 MDC_UEI25-120.A01 Page 1 of 11
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UEI25-120 Serieswww.DataSheet4U.com
Single Output Isolated 25-Watt DC/DC Converters
FUNCTIONAL SPECIFICATIONS (CONT.) – MODEL UEI25-120-D48
OUTPUT
Total Output Power
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
Current
Output Current Range
Minimum Load ➂
Current Limit Inception
Short Circuit
Short Circuit Current
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Hiccup autorestart duty cycle
Regulation ➄
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Maximum Capacitive Loading (10% ceramic,
90% Oscon)
MECHANICAL (Through Hole Models)
Outline Dimensions (no baseplate)
(Please refer to outline drawing)
Weight
Conditions ➀
See Derating
No trim
At 50% load
User-adjustable
Via magnetic feedback
97% of Vnom., after warmup
Hiccup technique, autorecovery within ±1.25%
of Vout
Output shorted to ground, no damage
Current limiting
Output shorted to ground
Vin=min. to max., Vout=nom., 50% load
Iout=min. to max., Vin=48V
5 Hz- 20 MHz BW
At all outputs
Cap. ESR=<0.02Ω, full resistive load
Conditions ➀ ➂
C75 case
WxLxH
Through Hole Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
ENVIRONMENTAL
Operating Ambient Temperature Range
Tref Location
Storage Temperature
Thermal Protection/Shutdown
Electromagnetic Interference
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
Relative humidity, non-condensing
Altitude
Nickel subplate
Gold overplate
With derating, 200 LFM
Measured in center
Vin = Zero (no power)
Measured at hotspot
External filter is required
To +85°C
must derate -1%/1000 feet
Acceleration
RoHS rating
Minimum
0.0
11.88
-1
-10
14
0.0
110
0
Minimum
-40
-55
130
10
-500
-152
Typical/Nominal
25.2
12.00
19
2.1
No minimum load
Continuous
TBD
95
0.02
Typical/Nominal
0.96x1.1x0.32
24.38x27.94x8.13
0.32
9.07
0.04
1.016
Copper alloy
TBD
TBD
135
B
B
RoHS-6
Maximum
25.45
12.12
+1
+10
22
2.1
130
0.1
Units
W
Vdc
% of Vset.
% of Vnom.
Vdc
A
% of IoutMax
A
±0.075
±0.05
120
470
Maximum
85
125
150
90
10,000
3048
%
% of Vout
% of Vout
mV pk-pk
% of Vnom./°C
μF
Units
Inches
mm
Ounces
Grams
Inches
mm
μ-inches
μ-inches
°C
°C
°C
Class
Class
%RH
feet
meters
Notes
➀ Unless otherwise noted, all specifications are at nominal input voltage, nominal output
voltage and full load. General conditions are +25˚ Celsius ambient temperature, near
sea level altitude, natural convection airflow. All models are tested and specified with
external parallel 1 μF and 10 μF multi-layer ceramic output capacitors. The external
input capacitor is 4.7 μF ceramic. All capacitors are low-ESR types wired close to the
converter. These capacitors are necessary for our test equipment and may not be
needed in the user's application.
➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth.
Input filtering is Cbus=220 μF, Cin=33 μF and Lbus=12 μH.
➂ All models are stable and regulate to specification under no load.
➃ The Remote On/Off Control is referred to -Vin.
➄ Regulation specifications describe the output voltage changes as the line voltage or
load current is varied from its nominal or midpoint value to either extreme.
www.murata-ps.com
email: [email protected]
23 Jun 2010 MDC_UEI25-120.A01 Page 5 of 11
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| Information | Total 11 Pages | |
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| Download | [ UEI25-120.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| UEI25-120 | The function is Low-profile Open-frame DC-DC Converters. Murata Manufacturing | |
| UEI25-120-D48 | The function is Single Output Isolated 25-Watt DC/DC Converters. Murata |  |
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