23 February 2012 Picor QuietPower QPI-21 Picor QuietPower QPI-21 Vicor has announced the introduction of the Picor QuietPower QPI-21 high density active emi filter for dc/dc converters. Supporting 48V dc/dc converter designs up to 14A for data communications and telecommunication applications, Vicor describes the QuietPower QPI-21 as an input filter that provides >99.5% efficiency while achieving a new level of filtering performance. The QuietPower QPI-21 is packaged in a high density, 25 x 25mm Land Grid Array (LGA) surface mount package designed to reduce pcb board area consumed by emi filtering. The filter's 4.5mm height maximises airflow for space constrained designs, making it suitable for advanced blade architecture applications. These density advantages are complemented by new performance enhancements enabling higher frequency attenuation across various system configurations than earlier-generation QuietPower QPI-series filters. The QuietPower QPI-21 attenuates conducted common mode (CM) and differential mode (DM) noise over the CISPR22 frequency range of 150kHz to 30MHz (45dB for CM and 80dB for DM attenuation at 250 KHz). The filter is designed for use in 48V bus (36 – 76V) systems, with 100Vdc/100ms surge capability, and operates over a wide temperature range of –40 to 125°C and up to an ambient temperature of 65°C without de-rating. The QPI-21 supports the PICMG 3.0 specification for filtering system boards to the EN55022 Class B limits and is also tolerant to all dc/dc converter grounding schemes. The QuietPower QPI-21 is the newest addition to the Picor QuietPower portfolio of high density emi input and output filters, addressing multiple voltage rail/bus needs for applications in aerospace and industrial, in addition to datacom and telecom. The QuietPower QPI-21, like all QuietPower filters, is a universal filter for use with dc/dc converters from any manufacturer. The combination of form factor, attenuation performance, and efficiency within the QuietPower QPI-21 exceeds the capabilities of conventional passive filters making it a suitable emi filter for demanding, high density datacom and telecomm systems with board space and/or airflow constraints. The QuietPower QPI-21 is available in two package types: the QPI-21LZ (lidded LGA package) and the QPI-21LZ-01 (open frame LGA package). Author Vicor Comment on this article Websites http://www.vicorpower.com Companies Vicor UK Ltd This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team. What you think about this article: Add your comments Name Email Comments Your comments/feedback may be edited prior to publishing. Not all entries will be published. Please view our Terms and Conditions before leaving a comment.