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800-Watt digital power supply for space-constrained applications introduced by Emerson

CARLSBAD, Calif., 6 Dec. 2012. Emerson Network Power in Carlsbad, Calif., is introducing the DS800SL-3 800-Watt bulk front-end power supply for enterprise servers and similar space-constrained applications.

The DS800SL-3 power electronics device has a power efficiency of 92 percent when operating at half-load from a 230-volt AC input, combined with a typical power factor of more than 0.99. Its power density is 19.05 Watts per cubic inch, and comes in a slim-line rack-mounting package.

The DS800SL-3 is a digital design. It has a built-in I2C serial bus interface and uses the industry-standard PMBus communications protocol.

Developed for distributed power architectures, the power supply has an input voltage range of 90 to 264 volts AC and is rated for 800 Watts output power.

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The main 12-volts DC payload output is programmable by plus/minus 10 percent, and can deliver as much as 65.7 amps continuously. An auxiliary always-on 5-volt DC output, rated at 2.4 amps, powers server management circuits.

Both outputs are tightly regulated, have no minimum load requirement, and offer remote sensing -- the 12-volts DC output can compensate for a load bus drop of as much as 200 millivolts.

Opposite-end AC input and DC outputs facilitate fast replacement in the field, and the DC output card edge connector is compatible with the Intel standard for high availability power supplies.

The power supplies have an operating temperature range of -10 to 50 degrees Celsius with no derating, and have a built-in cooling fan with automatic speed control; forward and reversed airflow versions are available to simplify integration with the rack's cooling layout.

For more information contact Emerson Network Power online at

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