Active EMI Filter targets 48 V dc-dc converter applications.

Press Release Summary:




Providing attenuation from 150 kHz to 30 MHz, Model QPI-4 delivers over 40 dB common-mode and more than 70 dB differential-mode noise attenuation at 500 kHz. It meets specifications for international 36-76 Vdc telecom bus, including 100 V, 100 ms surge requirement. Rated at 7 A, unit supports single or multiple dc-dc converters requiring up to 336 W of input power at 48 V input. Surface mount LGA package is rated for -40° to +100°C with 99% efficiency.



Original Press Release:



Active EMI Filter for Telecom Bus Market



Targets 48 V DC-DC converter applications

NORTH SMITHFIELD, RI, June 24, 2004 - Picor, a subsidiary of Vicor Corporation (NASDAQ:VICR) today introduced the QPI-4 active EMI filter for 48 V DC-DC converter applications. Providing attenuation from 150 kHz to 30 MHz, the QPI-4 delivers over 40 dB of common-mode and more than 70 dB of differential-mode noise attenuation at 500 kHz. The QPI-4 is the latest member of Picor's active EMI filter family for the telecom bus market, and its compact 1.0 x 1.0 x 0.2 inch (25.4 x 25.4.5 x 5.1mm) surface mount package offers board space savings of 50% to 80% over passive EMI filter solutions.

The QPI-4 meets the specifications for the international 36 to 76 Vdc telecom bus, including the 100 V, 100 ms surge requirement. Rated at 7A, the unit supports single or multiple DC-DC converters requiring up to 336 W of input power at 48 volts input. The QPI's ratings support the PICMGb 3.0 Advanced Telecom Computing Architecture (ATCA) specification requiring system boards to be filtered to EN 55022 limits at 200 W per system board.

The QPI-4 requires only 20-30% of the volume and 30-50% of the area of similarly rated passive filters, saving crucial board space. The surface mount LGA package is rated for operation over a case temperature range of -40 to +100°C with an efficiency of 99%. Units may be placed in series for even higher attenuation.

The QPI-4 supports all DC-DC converters in IT, Telecom, and other 48 Vdc applications requiring efficient filtering in small spaces. The QPI-4 is packaged in anti-static tubes and is priced at $12.53 per 1,000 piece quantity. Delivery: stock to 6 weeks.

For a data sheet and other information on the QPI-4L Active EMI Filter, please visit www.picorpower.com/. To order, contact Vicor Express at 800-735-6200 or

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