POWER
Murata shrinks dimensions on 3rd ed. medical 40W to 400W PSUs
mvac series oF highly eFFicient, 3 x 5” open Frame ac-dc power supplies
Suitable for use in a wide variety of industrial factory automation, communications and medical equipment, the series comprises two single output models, the 250 Watt MvAC250 and the 400 Watt MvAC400 units. Both models accommodate the universal AC input voltage range from 90 to 264 vAC with active power factor correction (PFC) and active inrush control. Each model is available with a popular nominal output voltage of 12, 24 or 50 vDC. in addition, a 12 vDC 1 A fan supply and an auxiliary 5 vDC 2 A output are provided across the range.
Packaged in an industry standard 1U open frame format measuring just 127.00 x 76.20 x 35.56 mm (5 x 3 x 1.4 inches), these low profile power converters have significantly better convection cooled performance characteristics than other competing designs. The MVAC250 can deliver up to 170 W output and the MVAC400 up to 250 W without the need for any forced air flow. With their high convection-cooled ratings, the use of the MVAC series allows OEMs to eliminate fan and fan controllers in their traditional power designs. This saves cost and reduces power packaging volume requirements. Removing cooling fans also allows designers to increase their product MTBF while decreasing system noise.
degrees C and derated operation up to 70 degrees C. Protection features include over voltage, over current, and over temperature. A remote sense input and power OK signal are provided across the range. Optional droop current sharing allows multiple supplies to be operated in parallel.
Packaged in the industry standard 2 x 4 inch format with a low profile, 1U compatible 1.3 inch height (50.8 x 101.6 x 33.02 mm), the low power MVAD series is suitable for use in a wide range of high volume
MVAD065
40 W and 65 W convection cooled AC-DC power supplies comply with 3rd edition medical safety standard
MVAC400 Murata’s 3” x 5” 250 W and 400 W AC-DC power supplies with medical approvals; convection-cooled operation up to 250 W
The MVAC250 and the MVAC400 comply with the internationally
recognized UL60601-1 3rd edition medical safety standard making them suitable for use in medical applications. The units also meet the IEC60950/UL60950 safety specifications and EN55022 standard for conducted emissions.
Each power supply is suited for use in a broad range of operating temperature environments. They are capable of operating on full power from -10 to +50 degrees C with a start-up temperature down to -20
www.avnet-abacus.eu 8 focus magazine - issue 17
applications including medical and healthcare appliances, data storage and networking, and industrial factory automation systems. Up to 90% efficient, the MVAD040 and MVAD065 do not require additional heatsinking or forced air cooling to operate at full output power. No load power consumption is less than 0.3 W, which meets ErP and Energy Star requirements. Accepting the universal input voltage range from 90 to 264 VAC, each model is available with a + 12, + 24, or +48 VDC output. Operating temperature startup is as low as – 20 degrees C. MVAD065 features remote sense, which compensates for lead losses up to 0.4 VDC at the load point. The supplies comply with the stringent demands of the internationally recognized 3rd edition medical safety standard IEC/EN 60601-1: 2006. They also meet the IEC/EN60950-1 safety standard for IT equipment. The MVAD series has an MTBF of one million hours, this being at least 2x the MTBF of similar competing devices available on the market today. For more information visit
avnet-abacus.eu/murata
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