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UEI30 Series
30W Isolated Wide-Range DC-DC Converters
ISOLATION CHARACTERISTICS
DYNAMIC CHARACTERISTICS
Input to
Isolation
Dynamic Load
Start-up Time
Model Family
UEI30-033-Q12P-C
UEI30-033-Q48N-C
UEI30-050-Q12P-C
Output.
Min
VDC
2000
2250
2000
Resistance
Min
MΩ
Isolation
Capacitance Insulation Safety
Rating
pF
1000
1000
1000
Model Family
UEI30-033-Q12P-C
UEI30-033-Q48N-C
UEI30-050-Q12P-C
Response
(50-75-50%
load step)
μsec
120 to 2%
180 to 2%
80 to 2%
V IN to V OUT Remote On/Off
regulated to V OUT
(Max.) regulated (Max.)
mSec
mSec
Switching
Frequency
KHz
275
280
275
UEI30-050-Q48N-C
UEI30-120-Q12P-C
2250
2000
10
1000
1500
Basic
UEI30-050-Q48N-C
UEI30-120-Q12P-C
100 to 1%
200 to 1%
50
50
275
275
UEI30-120-Q48N-C
UEI30-150-Q12P-C
UEI30-150-Q48N-C
2250
2000
2250
1500
1500
2000
UEI30-120-Q48N-C
UEI30-150-Q12P-C
UEI30-150-Q48N-C
150 to 1%
150 to 1%
150 to 1%
275
275
275
MISCELLANEOUS CHARACTERISTICS
Limit Inception
98% of V OUT ,
Operating Temperature temperature protection/
Model Family
Output Current
Output
Short
Circuit
after warmup Protection
Method
A
Output
Short
Circuit
Current
A
Output Short
Circuit Duration
(output shorted
to ground)
Output
Pre-biased
setup
Relative
Storage Thermal
Humidity,
non-
Range range shutdown
condensing
oC oC oC
UEI30-033-Q12P-C
UEI30-033-Q48N-C
11.5
11.2
0.3 max.
0.3 max.
UEI30-050-Q12P-C
7.9
Current
3.0
UEI30-050-Q48N-C
UEI30-120-Q12P-C
7.4
4.1
limiting,
hiccup
auto
0.3 max.
1.5
Continuous
Monotonic
(external
V OUT < V SET )
–40 to +85oC;
with Derating
(see Notes)
–55 to 125oC
115
To +85oC/
85% RH
UEI30-120-Q48N-C
UEI30-150-Q12P-C
UEI30-150-Q48N-C
3.65
3.0
3.25
restart
0.75
0.5
0.1 max.
Speci?cation Notes:
(1) All models are tested and speci?ed 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 speci?ed performance in your
applications. All models are stable and regulate within spec under no-load conditions.
All speci?cations are typical unless noted. General conditions for Speci?cations are +25 deg.C,
Vin=nominal, Vout=nominal, full load. Adequate air?ow must be supplied for extended testing under
power.
(2) Input Back Ripple Current is tested and speci?ed over a 5 Hz to 20 MHz bandwidth. Input ?ltering
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 air?ow, 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 speci?cations.
(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 ?lter. Low voltage logic circuits may
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 speci?cations, including “cold start” at –40 ° C.
(10) Regulation speci?cations 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 speci?cations when adjusting the output trim.
(14) At zero output current, the output may contain low frequency components which exceed the
ripple speci?cation. The output may be operated inde?nitely 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 certi?cations and to
avoid injury to personnel or equipment, the user must connect an external fast-blow fuse to the input
terminals. See fuse information.
have a small voltage margin between logic ZERO and logic ONE, requiring noise suppression. Use
only as much output ?ltering as needed to achieve your noise requirements. Excessive output
www.murata-ps.com/support
MDC_UEI Series 30W.B01 Page 4 of 18
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