UEI30 Series

30W Isolated Wide-Range DC/DC Converters

www.murata-ps.com

email: sales@murata-ps.com

14 Dec 2009

MDC_UEI Series 30W.A13_long Page 5 of 16

MISCELLANEOUS CHARACTERISTICS

Model Family

Output Current

Limit Inception

Output

Short

Circuit

Protection

Method

Output

Short

Circuit

Current

Output Short

Circuit Duration

(output shorted

to ground)

Output

Pre-biased

setup

Operating Temperature

Range

Storage

temperature

range

Thermal

protection/

shutdown

Relative

Humidity,

non-

condensing

after warmup

A

A

ºC

ºC

ºC

UEI30-033-Q12P-C

11.5

Current

limiting,

hiccup

auto

restart

0.3 max.

Continuous

Monotonic

(external

–40 to +85ºC;

with Derating

(see Notes)

–55 to 125ºC

115

To +85ºC/

85% RH

UEI30-033-Q48N-C

11.2

0.3 max.

UEI30-050-Q12P-C

7.9

3.0

UEI30-050-Q48N-C

7.0

0.3 max.

UEI30-120-Q12P-C

4.1

1.5

UEI30-120-Q48N-C

3.65

0.75

UEI30-150-Q12P-C

3.0

0.5

UEI30-150-Q48N-C

3.25

0.1 max.

DYNAMIC CHARACTERISTICS

Model Family

Dynamic Load

Response

(50-75-50%

load step)

Start-up Time

Switching

Frequency

regulated

(Max.)

Remote On/Off

regulated (Max.)

μsec

mSec

mSec

KHz

UEI30-033-Q12P-C

120 to 2%

50

50

275

UEI30-033-Q48N-C

180 to 2%

280

UEI30-050-Q12P-C

80 to 2%

275

UEI30-050-Q48N-C

100 to 1%

275

UEI30-120-Q12P-C

200 to 1%

275

UEI30-120-Q48N-C

150 to 1%

275

UEI30-150-Q12P-C

150 to 1%

275

UEI30-150-Q48N-C

150 to 1%

275

ISOLATION CHARACTERISTICS

Model Family

Input to

Output.

Isolation

Resistance

Isolation

Capacitance Insulation Safety

Rating

Min

Min

VDC

MΩ

pF

UEI30-033-Q12P-C

2000

10

1000

Basic

UEI30-033-Q48N-C

2250

1000

UEI30-050-Q12P-C

2000

1000

UEI30-050-Q48N-C

2250

1000

UEI30-120-Q12P-C

2000

1500

UEI30-120-Q48N-C

2250

1500

UEI30-150-Q12P-C

2000

1500

UEI30-150-Q48N-C

2250

2000

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

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.