EMI Input Filter Modules
Active EMI filter modules
The QPI family of active EMI filters provides conducted common-mode (CM) and differential-mode (DM) attenuation from 150kHz to 30MHz (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 MQPI-18 attenuates conducted common-mode (CM) and differential-mode (DM) noise for 28V input MIL PRMs to comply with MIL-STD-461F EMI requirements for conducted noise measurements. The filter operates within the full input operating range of a 28V MIL PRM and supports 7A loads up to 85°C (TA) without de-rating.
Part Number | Input | Current | Test Freq. | CM Attenuation | HiPot | Package | |
QPI-21LZ-01 | 30 – 80 | 14 | 250 | 45 | 1,500 | Open Frame | |
QPI-21LZ | 30 – 80 | 14 | 250 | 45 | 1,500 | LGA | |
QPI-12LZ-01 | 5.0 – 80 | 7 | 1,000 | 40 | 1,500 | Open Frame | |
QPI-12LZ | 5.0 – 80 | 7 | 1,000 | 40 | 1,500 | LGA | |
QPI-11LZ-01 | 5.0 – 50 | 7 | 1,000 | 60 | 707 | Open Frame | |
QPI-11LZ | 5.0 – 50 | 7 | 1,000 | 60 | 707 | LGA | |
QPI-6LZ-01 | 30 – 80 | 14 | 250 | 40 | 1,500 | Open Frame | |
QPI-6LZ | 30 – 80 | 14 | 250 | 40 | 1,500 | LGA | |
QPI-5LZ-01 | 10 – 40 | 14 | 250 | 60 | 707 | Open Frame | |
QPI-5LZ | 10 – 40 | 14 | 250 | 60 | 707 | LGA | |
QPI-3LZ-01 | 10 – 40 | 7 | 250 | 65 | 707 | Open Frame | |
QPI-3LZ | 10 – 40 | 7 | 250 | 65 | 707 | LGA | |
MQPI-18LP-01 | 5.0 – 50 | 7 | 1,000 | 45 | 1,500 | Open Frame | |
MQPI-18LP | 5.0 – 50 | 7 | 1,000 | 45 | 1,500 | LGA |