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What is UEI25-050-D48?

This electronic component, produced by the manufacturer "Murata", performs the same function as "Single Output Isolated 25-Watt DC/DC Converters".


UEI25-050-D48 Datasheet PDF - Murata

Part Number UEI25-050-D48
Description Single Output Isolated 25-Watt DC/DC Converters
Manufacturers Murata 
Logo Murata Logo 


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www.murata-ps.com
UEI25 Series
Single Output Isolated 25-Watt DC/DC Converters
Typical unit
Output (V)
3.3
5
12
Current (A)
7.5
5
2.1
Nominal Input (V)
48
48
48
FEATURES
Cost effective 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
3.3V, 5V, or 12Vdc fixed output voltages
Isolation up to 2250 VDC (basic)
Up to 25 Watts total output power with exten-
sive self-protection shutdown features
High efficiency synchronous rectifier forward
topology up to 91%
Stable operation with no required external
components
Usable -40 to 85°C temperature range (with
derating)
Certified to UL 60950-1, CAN/CSA-C22.2 No.
60950-1, IEC60950-1, EN60950-1 safety
approvals, 2nd edition
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" (24.4 x 27.9 x 8.1 mm) converter accepts a
2:1 input voltage range of 36 to 75 Volts DC, ideal
for telecom equipment. The industry-standard pin-
out fits larger 1" x 2" converters. The fixed output
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
optical 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
specifications assure compatibility to noise-sus-
ceptible 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.
F1 +Vin (1)
External
DC
Power
Source
On/Off
Control
(6)
Open = On
$MPTFE0GG
1PTJUJWF
MPHJD
-Vin (2)
*TPMBUJPO
Barrier
Controller
and Power
5SBOTGFS
t4XJUDIJOH
t'JMUFST
t$VSSFOU4FOTF
Reference and
Error Amplifier
Figure 1. Connection Diagram
Typical topology is shown. Murata Power Solutions
recommends an external fuse.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
REG.-Nr. D806
+Vout (3)
Trim (4)
-Vout (5)
MDC_UEI25W.B09 Page 1 of 24

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UEI25-050-D48 equivalent
UEI25 Series
Single Output Isolated 25-Watt DC/DC Converters
FUNCTIONAL SPECIFICATIONS – MODEL UEI25-050-D48
ABSOLUTE MAXIMUM RATINGS
Conditions
Minimum
Typical/Nominal
Maximum
Units
Input Voltage, Continuous
Full power operation
0
80 Vdc
Input Voltage, Transient
Operating or non-operating, 100 mS max.
duration
0
100 Vdc
Isolation Voltage
Input to output
2250 Vdc
Input Reverse Polarity
None, install external fuse
None Vdc
On/Off Remote Control
Power on or off, referred to -Vin
0
15 Vdc
Output Power
0
25.25
W
Output Current
Current-limited, no damage, short-circuit protected
0
5A
Storage Temperature Range
Vin = Zero (no power)
-55
125 ˚C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied or recommended.
INPUT
Operating voltage range
36 48 75 Vdc
Recommended External Fuse
Fast blow
1.5 A
Start-up threshold
Rising input voltage
34 35 36 Vdc
Undervoltage shutdown
Falling input voltage
32 33.5 34.5 Vdc
Overvoltage shutdown
None Vdc
Reverse Polarity Protection
None, install external fuse
None Vdc
Internal Filter Type
LC
Input current
Full Load Conditions
Vin = nominal
0.57 0.59 A
Low Line
Vin = minimum
0.76 0.79 A
Inrush Transient
0.05 A2-Sec.
Output in Short Circuit
50 100 mA
No Load
Iout = minimum, unit=ON
30 50 mA
Standby Mode (Off, UV, OT)
1 3 mA
Reflected (back) ripple current
Measured at input with specified filter
30 mA, RMS
Pre-biased startup
External output voltage < Vset
Monotonic
GENERAL and SAFETY
Efficiency
Vin=48V, full load
Vin=36V, full load
89 91
89 91
%
%
Isolation
Isolation Voltage
Input to output, continuous
2250
Vdc
Insulation Safety Rating
basic
Isolation Resistance
10 Mohm
Isolation Capacitance
2000 pF
Safety
Certified to UL-60950-1, CSA-C22.2 No.60950-1,
IEC/EN60950-1, 2nd edition
Yes
Calculated MTBF
Per MIL-HDBK-217F, ground benign,
Tambient=+30˚C
TBD Hours x 106
Calculated MTBF
Per Telcordia SR332, issue 1, class 3, ground
fixed, Tambient=+40°C
2
Hours x 106
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency
300 330 360 KHz
Startup Time
Power On to Vout regulated
50 mS
Startup Time
Remote ON to Vout regulated
50 mS
Dynamic Load Response
50-75-50% load step, settling time to within
±2% of Vout
200
μSec
Dynamic load di/dt
2 A/μSec
Dynamic Load Peak Deviation
same as above
±150
mV
FEATURES and OPTIONS
Remote On/Off Control
"N" suffix
Negative Logic, ON state
ON = Ground pin or external voltage
-0.7
0.7 V
Negative Logic, OFF state
OFF = Pin open or external voltage
10
15 V
Control Current
1 mA
"P" suffix
Positive Logic, ON state
ON = Pin open or external voltage
10
15 V
Positive Logic, OFF state
OFF = Ground pin or external voltage
-0.7
0.8 V
Control Current
1 mA
www.murata-ps.com/support
MDC_UEI25W.B09 Page 5 of 24


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Part NumberDescriptionMFRS
UEI25-050-D48The function is Single Output Isolated 25-Watt DC/DC Converters. MurataMurata

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