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UWE-5-3-Q48N-C Datenblatt(PDF) 6 Page - Murata Manufacturing Co., Ltd.

Teilenummer UWE-5-3-Q48N-C
Bauteilbeschribung  Wide Input, Isolated Eighth-Brick DC/DC Converters
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Hersteller  MURATA [Murata Manufacturing Co., Ltd.]
Direct Link  http://www.murata.com
Logo MURATA - Murata Manufacturing Co., Ltd.

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UWE Series
Wide Input, Isolated
Eighth-Brick DC/DC Converters
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
MDC_UWE Series.A17 Page 6 of 20
CAUTION: This product is not internally fused. To comply with safety agency cer-
tifications and to avoid injury to personnel or equipment, the user must supply an
external fast-blow fuse to the input terminals. See fuse information.
1 All Q12 models are tested and specified with external 1μF and 10μF paralleled
ceramic/tantalum output capacitors and a 100μF external input capacitor. Q48
models test with a 35μF input cap. All capacitors are low ESR types. Contact Murata
Power Solutions for details. These capacitors are necessary to accommodate our
test equipment and may not be required to achieve specified performance in your
applications. However, Murata Power Solutions recommends using these capacitors
in your application. All models are stable and regulate within spec under no-load
conditions.
All specifications are typical unless noted. General conditions for Specifications are
+25° 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 bandwidth. Input
filtering is Cin=33 μF, Cbus=220 μF, 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
that power dissipation degrades as altitude increases.
4a Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method
1, Case 3, ISSUE 2, ground fixed controlled conditions, Tambient=+25°C, full output
load, natural air convection.
4b Mean Time Before Failure is calculated using MIL-HDBK-217F, GB ground benign,
Tambient=+25°C, full output load, natural air convection.
5 The Remote On/Off Control is normally controlled by a switch or 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.
6 Short circuit shutdown 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. See I/O Filtering
and Noise Reduction. Larger caps (especially low-ESR ceramic capacitors) may
slow transient response or degrade stability. Use only as much output filtering as
needed to achieve your noise requirements and no more. 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. 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 If the user adjusts the output voltage, accuracy is dependent on user-supplied
trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-film
resistors. If no trim is installed, the converter will achieve its rated accuracy. Do not
exceed maximum power specifications when adjusting the output trim.
12 Output current limit and short circuit protection is non-latching. When the overcur-
rent fault is removed, the converter will immediately recover.
13 Alternate pin length and/or other output voltages may be available under special
quantity order.
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 Input Fusing: To ensure reverse input protection with full output load, always con-
nect an external input slow-blow fuse in series with the +Vin input. Use approxi-
mately twice the full input current rating at the selected input voltage.
16 “Hiccup” overcurrent 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 converter immediately
recovers normal operation.
17 Note that the converter will operate up to the rated baseplate maximum tempera-
ture with the baseplate installed and properly heat sunk. To avoid thermal self-
protection shutdown, do not exceed this maximum baseplate temperature.
18 UWE-24/3-Q12 undervoltage shutdown of 8.0V is at half load.
19 UWE-24/3-Q12 output overvoltage protection requires 0.3A minimum load.
20 Pre-bias operation: Startup will succeed if the output setpoint voltage is higher than
the pre-existing external output voltage.
SPECIFICATION NOTES
CALCULATED MTBF (TELCORDIA SR-332 METHOD, SEE NOTE 4A)
Model
Hours
UWE-3.3/20-Q12
1,248,001
UWE-5/15-Q12
1,847,009
UWE-5/15-Q48
2,273,212
UWE-12/6-Q12
3,755,203
CALCULATED MTBF (MIL-HDBK-217N2 METHOD, SEE NOTE 4B)
UWE-3.3/20-Q12
1,089,141
UWE-5/15-Q12
1,936,627
UWE-5/15-Q48
1,657,518
UWE-12/6-Q12
1,239,521


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