The QPI-3LZ, QPI-5LZ, QPI-6LZ, QPI-8LZ and QPI-21LZ are active EMI filters providing conducted common-mode (CM) and differential-mode (DM) attenuation from 150 kHz to 30 MHz (CISPR22 range). The proprietary active filtering circuit provides superior attenuation at low frequencies intended to support EN Class B limits, including PICMG® 3.0 for ATCA boards. In comparison to passive solutions, the use of active filtering reduces the volume of the common-mode choke, providing a low profile, surface mount device. Smaller size saves valuable board real estate and the reduced height enhances airflow in blade applications.
The QPI-10LZ to QPI-12LZ are filters, optimized for V•I Chips, are specifically designed to attenuate conducted common-mode (CM) and differential-mode (DM) noise of Vicor’s V•I Chip products to comply with the CISPR22 standard requirements for conducted noise measurements. Designed for the telecom, industrial and military bus ranges, the V•I Chip EMI filter supports filtering system boards to the EN55022 Class B limits.