New EMI Filter for DC-DC Converters:
Picor QuietPower® QPI-21

February 6, 2012
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Just launched, the Picor QuietPower® QPI-21 high density active EMI filter supports 48V DC-DC converter designs up to 14A for data communications and telecommunication applications.  The QuietPower QPI-21 provides >99.5% efficiency while achieving a new level of filtering performance, reducing PCB area, increasing attenuation density, reducing  susceptibility and reducing power dissipation.

Part of the Picor QuietPower portfolio of high density EMI input and output filters,the QPI-21 filter attenuates conducted common mode (CM) and differential mode (DM) noise over the CISPR22 frequency range of 150 kHz to 30 MHz (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°C 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.

A universal filter for use with DC-DC converters from any manufacturer, the QPI-21’s features include

  • 45 dB CM attenuation at 250 KHz (50Ω)
  • 80 dB DM attenuation at 250 KHz (50Ω)
  • 80 Vdc (max input)
  • 100 Vdc surge 100 ms
  • 1,500 Vdc hipot hold off to shield plane
  • 14 A rating
  • 25.3 x 25.3 x 5.0 mm Lidded SiP (System‐in‐Package)
  • 24.9 x 24.9 x 4.4 mm Open‐frame SiP
  • Low profile LGA package
  • Efficiency >99%
  • Connect in series for higher attenuation

This makes it the ideal EMI filter for demanding, high density datacom and telecomm systems with board space and/or airflow constraints.

Full specs and data sheets: QuietPower® Active EMI Filters – QPI-21LZ

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