North Smithfield, R.I. Targeting the telecommunications bus market, Picor, a subsidiary of Vicor Corp. offers a new active EMI filter for 48 V dc-to-dc converter applications. The company says the EMI filter's compact surface-mount package, measuring 1.0 x 1.0 x 0.2-in. (25.4 x 25.4.5 x 5.1-mm), offers a board space savings of 50% to 80% over passive EMI filter solutions.
Providing attenuation from 150 kHz to 30 MHz, the QPI-4 EMI filter delivers more than 40 dB of common-mode and more than 70 dB of differential-mode noise attenuation at 500 kHz.
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 device supports single or multiple dc-to-dc converters requiring up to 336 W of input power at 48 V input. The QPI-4's ratings support the PICMG 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 EMI filter requires only 20% to 30% of the volume and 30% to 50% of the area of similarly rated passive filters, saving board space, according to the company. The surface mount LGA package is rated for operation over a case temperature range of -40°C to 100°C with an efficiency of 99%. Units may be placed in series for higher attenuation.
The company says the QPI-4 supports all dc-to-dc converters in IT, telecommunications, and other 48 Vdc applications that require efficient filtering in small spaces. Packaged in anti-static tubes, the QPI-4 EMI filter is priced at $12.53 per 1,000 piece quantities. Delivery is from stock to six weeks.
Call (800) 735-6200