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Front-End Power Supplies for Hot-Plug, Redundant Power Systems

Wed, 12/08/2010 - 1:24pm
Medical Design Technology
Front-End Power Supplies for Hot-Plug, Redundant Power Systems

TDK-Lambda has launched a new line 1,600 W front-end power supplies for use in distributed, hot-pluggable, and redundant power systems. The HFE1600 series operate off a universal AC input of from 85 to 265 VAC, with active PFC, and provides a well regulated DC output of 12, 24, or 48 V. Operating efficiencies of up to 92% are typical. With the 19-inch rack-mount enclosure as many as five supplies can be paralleled with automatic load-sharing to provide up to 7,600 W of output power. A popular option is an integral MCU in each supply that allows for remote programming, monitoring, and status reporting via an isolated I2C and PMBus interface. And, an “energy-saving” feature of the I2C/PMBus interface is that rack-mounted HFE1600 supplies can be individually turned on or off as the total system load demand varies over time (aka “load-shedding”).

The HFE1600 supplies, each measuring only 1.61 in. H x 3.35 in. W x 11.8 in. L, can be used individually or as many as five can be mounted in an 1-U high 19-inch rack enclosure to form a paralleled connected, load-sharing, hot-swap, N + M redundant 7.6 kW power system. Should a fault occur, each supply has an internal ORing MOSFET switch that will automatically disconnect it from the load and the other paralleled supplies. Plus, alarm signals and LED indicators are provided to indentify a faulty unit. For added power, up to two rack-mounted enclosures can be parallel or series connected.

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