Active EMI Input Filters (QPI Series) For 24/28 V and 48/60 V BUS Applications ® Features C S US n Up to 65 dB CM attenuation at 250 kHz n Up to 80 dB DM attenuation at 250 kHz n Efficiency: >99% at full load n High density, low profile LGA package n Integrated Hot-Swap in select models n -40 to +100°C PCB temperature Full: 25 x 25 x 4.5 mm n TÜV approved n Saves up to 50% board space vs. standard filters n Compatible with most DC-DC converters Product Description Applications The QPI family of active EMI filters provides conducted common-mode (CM) and differentialmode (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 PICMG3.0 for ATCA boards. n PICMG® 3.0 ATCA applications 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. n Networking & communications n Fan-tray assemblies n Telecom n Industrial n Military Part Numbering Part Number (-01 = Open Frame) Input Voltage Nominal Range Current Rating QPI-3LZ (-01) 24/28 Vdc 10 – 40 Vdc 7A 65 dB 80 dB 707 Vdc — full QPI-5LZ (-01) 24/28 Vdc 10 – 40 Vdc 14 A 60 dB 75 dB 707 Vdc — full QPI-6LZ (-01) 48/60 Vdc 30 – 80 Vdc 14 A 40 dB 80 dB 1,500 Vdc — full QPI-8LZ (-01) 48/60 Vdc 32 – 76 Vdc 6A 40 dB 70 dB 1,500 Vdc Yes full QPI-21LZ (-01) 48/60 Vdc 30 – 80 Vdc 14 A 45 dB 80 dB 1,500 Vdc — full Block Diagram Performance PWRGD OV UVEN CM Attenuation DM Attenuation Hipot Integrated Package @250 kHz @250 kHz Hot-Swap PowerGood QPI-8 BUS+ BUS+ QPI+ Active EMI Filter Hot-Swap Function SW SHIELD BUS- QPI+ QPI- QPI- SW SHIELD Figure 1: Block diagram, QPI with integrated Hot-Swap Figure 2: Conducted EMI scans showing QPI performance. Blue trace = no QPI; Red trace = with QPI. vicorpower.com • 800 927.9474 Rev 1.1 11/2013 C NRT EMI Input Filters (QPI Series) For 24/28 V and 48/60 V BUS Applications ® Features C S US n 24/28 and 48/60 models n Up to 60 dB CM attenuation at 250 kHz n Up to 80 dB DM attenuation at 250 kHz n Efficiency: >99% n Low profile LGA package n Integrated Hot-Swap in select models Full: 25 x 25 x 4.5 mm Half: 25 x 12.5 x 4.5 mm n Supports PICMG® 3.0 ATCA applications n -40 to +100°C PCB temperature n TÜV approved Product Description Applications These QPI filters are specifically designed to attenuate conducted common-mode (CM) and differential-mode (DM) noise for converters switching in the 1 MHz range, to comply with CISPR22 standard requirements for conducted noise measurements. n PICMG® 3.0 ATCA applications Designed for the telecom, industrial and military bus ranges, the QPI filter supports filtering system boards to the EN55022 Class B limits. n Telecom n Networking & communications n Fan-tray assemblies n Industrial Part Numbering Part Number (-01 = Open Frame) Input Voltage Nominal Range QPI-10LZ (-01) 48/60 Vdc 32 – 76 Vdc 6A 40 dB 60 dB 1,500 Vdc Yes full QPI-11LZ (-01) 24/28 Vdc 5 – 50 Vdc 7A 60 dB 70 dB 707 Vdc — half QPI-12LZ (-01) 48/60 Vdc 10 – 80 Vdc 7A 40 dB 70 dB 1,500 Vdc — half Figure 1: QPI-12 attenuation curves Current Rating CM Attenuation DM Attenuation Hipot Integrated Package @1 MHz @1 MHz Hot-Swap Figure 2: Total conducted noise of P048K048T24IF & V048K120T025 VI Chip PRM and VTM with QPI-12 vicorpower.com • 800 927.9474 Rev 2.1 11/2013 C NRT