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PDF UEI15 Data sheet ( Hoja de datos )
| Número de pieza | UEI15 | |
| Descripción | Isolated Wide Input Range 15-Watt DC/DC Converters | |
| Fabricantes | Murata Manufacturing | |
| Logotipo |  |
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UEI15 Series
Isolated Wide Input Range w15w-wW.DaatttaDSCh/eDeCt4CUo.cnovmerters
Typical unit
FEATURES
n Small footprint DC/DC converter, ideal for
high current applications
n Industry standard 0.9" x 1.1" X 0.335"
open frame package and pinout
n Wide range input voltages 9-36 and
18-75 Vdc
n Double lead-free assembly and attachment
for RoHS standards
n Isolation up to 2250 VDC (basic)
n Up to 15 Watts or greater total output
power with overtemperature shutdown
n High efficiency synchronous rectifier
forward topology
n Stable no-load operation with no required
external components
n Usable -40 to 85°C temperature range
(with derating)
n Designed to meet UL 60950-1, CAN/CSA-
C22.2 No. 60950-1, IEC60950-1,
EN60950-1 safety approvals
n Extensive self-protection shut down
features
Featuring a full 15 Watt or greater output in one square inch of board area, the UEI
series isolated DC/DC converter family offers efficient regulated DC power for printed
circuit board mounting.
PRODUCT OVERVIEW
Wide range 4:1 inputs on the 0.9" x 1.1" x 0.335"
converter are either 9 to 36 Volts DC (Q12 models)
or 18 to 75 Volts DC (Q48 models), ideal for battery-
powered and telecom equipment. The industry-
standard pinout fits larger 1" x 2" converters. Fixed
output voltages from 3.3 VDC to 15 VDC are regu-
lated to within ±0.2% or less and may be trimmed
within ±10% of nominal output. Applications
include small instruments, area-limited microcon-
trollers, computer-based systems, data communi-
cations equipment, remote sensor systems, vehicle
and portable electronics.
The UEI 15W series includes full magnetic and
optical isolation up to 2250 Volts DC (basic insula-
tion). For connection to digital systems, the outputs
offer fast settling to current step loads and toler-
ance of higher capacitive loads. Excellent ripple
and noise specifications assure compatibility to
circuits using CPU’s, ASIC’s, programmable logic
and FPGA’s. For systems requiring controlled
startup/shutdown, an external switch, transis-
tor or digital logic may be used to activate the
remote On/Off control.
A wealth of self-protection features avoid both
converter and external circuit problems. These
include input undervoltage lockout and overtem-
perature shutdown. The outputs current limit using
the “hiccup” autorestart technique and the outputs
may be short-circuited indefinitely. Additional
features include output overvoltage and reverse
conduction elimination.
The high efficiency offers minimal heat buildup
and “no fan” operation.
SIMPLIFIED SCHEMATIC
+VIN
+VOUT
On/Off
Control
Control
−VIN
GATE DRIVE
–VOUT
ISOLATION BARRIER
ISOLATION
Reference, Trim &
Error Amplifier
TRIM
For full details go to
www.murata-ps.com/rohs
3.3V and 5Vout models only.
Typical topology is shown.
www.murata-ps.com
MDC_UEI15W.B21 Page 1 of 13
1 page  
UEI15 Series
Isolated Wide Input Range w15w-wW.DaatttaDSCh/eDeCt4CUo.cnovmerters
ABSOLUTE MAXIMUM RATINGS
Input
Voltage
Q12 models
Q48 models
Volts Max. continuous
Volts, transient 100mS
Volts Max. continuous
Volts, transient 100mS
On/Off control,
referred to –Vin
Volts, Min.
Volts, Max.
Input Reverse Polarity Protection
Output Overvoltage, Volts Max.
Output Current, sustained short circuit
Storage Temperature
Range, Min. ºC
Max. ºC
36 VDC
50 VDC
75 VDC
100 VDC
–0.3
15
See fuse section
Vout nom. +20%
Current-limited, see specs
-55
+125
Absolute Maximum Ratings
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 Specifi-
cations is neither implied nor recommended.
SPECIFICATION NOTES
(1) All models are tested and specified with external capacitors listed in the
table below. The external capacitors listed below are ONLY for establishing test
specifications. They are required for our test fixtures and equipment. Your applica-
tion may not need them. The converter is stable with no external capacitors but
Murata Power Solutions strongly recommends external caps. All caps are low-ESR
types. Where two or more capacitors are listed, these are connected in parallel. All
caps should mount close to the DC/DC using short leads.
All specifications are typical unless noted. General conditions for Specifica-
tions are +25 deg.C, Vin=nominal, Vout=nominal, full load. Adequate airflow
must be supplied for extended testing under power.
(2) Input Ripple Current is tested and specified over a 5 Hz to 20 MHz band-
width. Input filtering is Cin=33 µF, 100V tantalum, Cbus=220 µF, 100V elec-
trolytic, Lbus=12 µH.
(3) Note that Maximum Power Derating curves indicate an average current at
nominal input voltage. At higher temperatures and/or lower airflow, the DC/DC
converter will tolerate brief full current outputs if the total RMS current over time
does not exceed the Derating curve. All Derating curves are presented at sea level
altitude. Be aware of reduced power dissipation with increasing density altitude.
INPUT/OUTPUT EXTERNAL TEST CAPACITORS
Model
Input Capacitor Output Capacitor(s)
UEI15-033-Q12
100 µF
1 µF & 10 µF
UEI15-033-Q48
4.7 µF ceramic
1 µF & 10 µF
UEI15-050-Q12
100 µF
1 µF & 10 µF
UEI15-050-Q48
4.7 µF ceramic
1 µF & 10 µF
UEI15-120-Q12
100 µF
1 µF & 10 µF
UEI15-120-Q48
4.7 µF ceramic
1 µF & 10 µF
UEI15-150-Q12
100 µF
1 µF & 10 µF
UEI15-150-Q48
4.7 µF ceramic
1 µF & 10 µF
(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-
332 Method 1, Case 3, ground fixed conditions, Tpcboard=+25 deg.C, full load,
natural air convection.
(5) The On/Off Control is normally controlled by a switch. But it may also be
driven with external logic or by applying appropriate external voltages which
are referenced to Input Common. The On/Off Control Input should use either an
open collector or open drain transistor.
(6) Output current limiting begins when the output voltage degrades
approximately 2% from the selected setting.
(7) The outputs are not intended to sink appreciable reverse current. This
may damage the outputs.
(8) Output noise may be further reduced by adding an external filter. See
I/O Filtering and Noise Reduction.
(9) All models are fully operational and meet published specifications,
including “cold start” at –400 C. At full power, the package temperature of all
on-board components must not exceed +128°C.
(10) Regulation specifications describe the deviation as the line input voltage
or output load current is varied from a nominal midpoint value to either extreme.
(11) The output overvoltage protection is automatic recovery after fault
removal. The overvoltage may occur either from internal failure or from an
external forcing voltage as in a shared power system.
(12) Output current limit and short circuit protection is non-latching. When
the overcurrent fault is removed, the converter will immediately recover.
(13) Do not exceed maximum power specifications when adjusting the
output trim.
(14) At zero output current, the output may contain low frequency com-
ponents which exceed the ripple specification. The output may be operated
indefinitely with no load.
(15) If reverse polarity is accidentally applied to the input, a body diode
will become forward biased and will conduct considerable current. To ensure
reverse input protection with full output load, always connect an external input
fuse in series with the +Vin input. Use approximately twice the full input cur-
rent rating with nominal input voltage.
(16) “Hiccup” operation repeatedly attempts to restart the converter with
a brief, full-current output. If the overcurrent condition still exists, the restart
current will be removed and then tried again. This short current pulse prevents
overheating and damaging the converter. Once the fault is removed, the con-
verter immediately recovers normal operation.
(17) On model UEI15-050-Q48, if Vin <20V, output trim may only be adjusted
downwards from +5.0V (more negative).
CAUTION: This product is not internally fused. To comply with safety
agency certifications and to avoid injury to personnel or equipment, the user
must connect an external fast-blow fuse to the input terminals. See fuse
information.
www.murata-ps.com
MDC_UEI15W.B21 Page 5 of 13
5 Page 
PERFORMANCE DATA
Efficiency vs. Line Voltage and Load Current @ 25°C
100
90
80
70
Vin = 36 V
60 Vin = 24 V
50 Vin = 18 V
40 Vin = 9 V
30
20
10
0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75
Load Current (Amps)
UEI15 Series
Isolated Wide Input Range w15w-wW.DaatttaDSCh/eDeCt4CUo.cnovmerters
UEI15-050-Q12
3.2
Maximum Current Temperature Derating @sea level
(Vin = 12 or 24V, airflow from input to output)
3.0
Natural Convection
2.8
2.6
2.4
2.2
3 2.0
40 45 50 55 60 65 70 75 80 85
Ambient temperature (°C)
Efficiency vs. Line Voltage and Load Current @ 25°C
100
90
80
70
60 Vin = 75 V
50 Vin = 36 V
40
30
Vin = 24 V
20 Vin = 18 V
10
0
0 0.5 1 1.5 2 2.5 3
Load Current (Amps)
UEI15-050-Q48
Maximum Current Temperature Derating @Sea Level
(Vin = 24V or 48V, airflow is from input to output)
3.20
3.10
3.00
2.90 Natural Convection
2.80
2.70
2.60
2.50
40 45 50 55 60 65 70 75 80
Ambient Temperature (°C)
85
Efficiency vs. Line Voltage and Load Current @ 25°C
90
85
80
Vin = 36 V
75 Vin = 24 V
70 Vin = 18 V
Vin = 9 V
65
UEI15-120-Q12
Maximum Current Temperature Derating @Sea Level
(Vin = 12V or 24V, airflow is from pin 2 to pin 1)
1.30
1.20 Natural Convection
1.10
1.00
0.90
0.80
0.70
0.60
60
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3
Load Current (Amps)
0.50
40 45 50 55 60 65 70 75 80
Ambient Temperature (°C)
85
www.murata-ps.com
MDC_UEI15W.B21 Page 11 of 13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet UEI15.PDF ] | |
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