EMI Input Filters Compatible with Most DC-DC Converters

June 7, 2005

The QPI family of active EMI filters provides conducted common-mode (CM) and differential-mode (DM) attenuation from 150 kHz to 30 kHz. The proprietary active filtering circuit provides superior attenuation for typical power conversion frequencies and supports PICMG ® 3.0 ATCA requirements.

The QPI-4 and QPI-6 meet the specifications for the telecom bus: range 36-76 V including 100 V, 100 ms surge capability. Rated at 7 and 14 A, the products support single or multiple DC-DC converters requiring up to 672 W of input power at 48 V input.

The QPI-3 and QPI-5 operate over a 10-40 Vdc range to support industrial bus and COTS defence applications. The units are rated at 7 and 14 A respectively and support single or multiple DC-DC converters requiring up to 336 W of input power at 24 V input.

QPI-8 has in-rush current limit and circuit breaker functions with Hot Swap capability supporting PICMG 3.0 200 W per board limit on 48 or 60 V DC bus. It complies with AdvancedTCA™ PICMG 3.0 requirements for hot insertion.

The QPI family is available in a 25 x 25 x 4.5 mm SiP with LGA mounting. For further information and datasheets, go to http://www.vicorpower.com/power-path-management-protection

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