UEI30 Series
30W Isolated Wide-Range DC/DC Converters
ISOLATION CHARACTERISTICS
Input to
Output.
Model Family
Min
VDC
UEI30-033-Q12P-C
UEI30-033-Q48N-C
UEI30-050-Q12P-C
UEI30-050-Q48N-C
UEI30-120-Q12P-C
UEI30-120-Q48N-C
UEI30-150-Q12P-C
UEI30-150-Q48N-C
2000
2250
2000
2250
2000
2250
2000
2250
10
Min
MΩ
Isolation
Resistance
Isolation
Capacitance Insulation Safety
Rating
pF
1000
1000
1000
1000
1500
1500
1500
2000
Basic
UEI30-033-Q12P-C
UEI30-033-Q48N-C
UEI30-050-Q12P-C
UEI30-050-Q48N-C
UEI30-120-Q12P-C
UEI30-120-Q48N-C
UEI30-150-Q12P-C
UEI30-150-Q48N-C
DYNAMIC CHARACTERISTICS
Start-up Time
Dynamic Load
Response
V
IN
to V
OUT
Remote On/Off Switching
(50-75-50% regulated
Frequency
to V
OUT
load step)
(Max.) regulated (Max.)
μsec
120 to 2%
180 to 2%
80 to 2%
100 to 1%
200 to 1%
150 to 1%
150 to 1%
150 to 1%
50
50
mSec
mSec
KHz
275
280
275
275
275
275
275
275
Model Family
MISCELLANEOUS CHARACTERISTICS
Output Current
Limit Inception
Model Family
Output
Short
Circuit
98% of V
OUT
,
after warmup Protection
Method
A
11.5
11.2
7.9
7.0
4.1
3.65
3.0
3.25
Current
limiting,
hiccup
auto
restart
Output
Short
Circuit
Current
A
0.3 max.
0.3 max.
3.0
0.3 max.
1.5
0.75
0.5
0.1 max.
capacitance can retard transient response or possibly cause instability. Low ESR ceramic capacitors
may degrade dynamic performance. Be sure to thoroughly test your system under full load with all
components installed.
(9) All models are fully operational and meet published specifications, including “cold start” at –40°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. The overvoltage may occur either from
internal failure or from an external forcing voltage as in a shared power system.
(12) Output overvoltage and short circuit protection is non-latching. When the overvoltage fault is
removed, the converter will immediately recover. After an output overcurrent or short circuit, “hiccup”
operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcur-
rent 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 converter
immediately resumes normal operation.
(13) Do not exceed maximum power specifications when adjusting the output trim.
(14) At zero output current, the output may contain low frequency components which exceed the
ripple specification. The output may be operated indefinitely with no load.
(15) If reverse polarity is accidentally applied to the input, 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 current rating with nominal input voltage.
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.
Relative
Storage
Thermal
Output Short
Humidity,
Output
Circuit Duration
Operating Temperature temperature protection/
non-
Pre-biased
range
shutdown
(output shorted
Range
condensing
setup
to ground)
ºC
ºC
ºC
UEI30-033-Q12P-C
UEI30-033-Q48N-C
UEI30-050-Q12P-C
UEI30-050-Q48N-C
UEI30-120-Q12P-C
UEI30-120-Q48N-C
UEI30-150-Q12P-C
UEI30-150-Q48N-C
Continuous
Monotonic
(external
V
OUT
< V
SET
)
–40 to +85ºC;
with Derating
(see Notes)
–55 to 125ºC
115
To +85ºC/
85% RH
Specification Notes:
(1) All models are tested and specified with external 1 μF and 10 μF parallel output capacitors and a
22 μF external input capacitor. All capacitors are low ESR types. These capacitors are necessary to
accommodate our test equipment and may not be required to achieve specified performance in your
applications. All models are stable and regulate within spec under no-load conditions.
All specifications are typical unless noted. General conditions for Specifications are +25 deg.C,
Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied for extended testing under
power.
(2) Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering
is Cin=33 μF, 100V, Cbus=220 μF, 100V, 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.
(4) Refer to page 10 for MTBF values.
(5) The On/Off Control is normally selected by a switch or an open collector or open drain transistor.
But it may also be driven with external logic or by applying appropriate external voltages which are
referenced to Input Common and do not exceed the On/Off voltage specifications.
(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.
(8) Output noise may be further reduced by adding an external filter. Low voltage logic circuits may
have a small voltage margin between logic ZERO and logic ONE, requiring noise suppression.
Use
only as much output filtering as needed
to achieve your noise requirements. Excessive output
www.murata-ps.com
14 Dec 2009
email: sales@murata-ps.com
MDC_UEI Series 30W.A13_long
Page 5 of 16
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
