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UWE-3.3-6-Q48N-C Datasheet(PDF) 6 Page - Murata Manufacturing Co., Ltd. |
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UWE-3.3-6-Q48N-C Datasheet(HTML) 6 Page - Murata Manufacturing Co., Ltd. |
6 / 13 page 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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