AC/DC supply achieves 11.2W/in.3
By Margery Conner, Technical Editor -- EDN, April 26, 2007
The MFA350 ac/dc power supply from XP Power provides 350W in its 3.2×6.8×1.5-in. (81×173×38-mm), U-bracket package. The base product delivers 364W across the entire input range of 90 to 264V ac and is available in 12, 24, and 48V-dc-output versions. It includes a 12V, 1A fan supply and a 5V, 0.3A standby supply and signal set, including ac fail, dc OK, remote on/off, active current sharing, and remote sensing. The unit functions at full power from –10 to +50°C and at temperatures as high as 70°C with derating. The MFA350 is 89% efficient, and requires 13-cfm airflow for full output power. Hot-swap models have OR-ing FET outputs, front-access IEC (International Electrotechnical Commission) inlets, and extraction handles. The supply fits a 1U×2U profile, allowing vertical or horizontal orientation in a standard telecom chassis. It costs $175 (OEM quantities).
