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.
- Up to 65 dB CM attenuation at 250 kHz (QPI-3LZ to QPI-8LZ, QPI-21LZ)
- Up to 80 dB DM attenuation at 250 kHz (QPI-3LZ to QPI-8LZ, QPI-21LZ)
- Up to 60 dB CM attenuation at 1 MHz (QPI-10LZ to QPI-12LZ)
- Up to 70 dB DM attenuation at 1 MHz (QPI-10LZ to QPI-12LZ)
- Efficiency: >99% at full load
- High density, low profile LGA package
- Integrated Hot-Swap in select models
- -40° to +100°C PCB temperature
- TÜV approved
- Saves up to 50% board space vs. standard filters
- Compatible with most DC-DC converters
QPI-6LZ30 — 80 Vdc14 A40 dB80 dBNo
| Part Number | Input Range | Current Rating | CM Attenuation | DM Attenuation | Hot-Swap |
| QPI-3LZ | 10 — 40 Vdc | 7 A | 65 dB | 80 dB | No |
| QPI-5LZ | 10 — 40 Vdc | 14 A | 60 dB | 75 dB | No |
| QPI-8LZ | 32 — 76 Vdc | 6 A | 40 dB | 70 dB | Yes |
| QPI-21LZ | 30 — 80 Vdc | 14 A | 45 dB | 80 dB | No |
| QPI-10LZ | 32 — 76 Vdc | 6 A | 40 dB | 60 dB | Yes |
| QPI-11LZ | 5 — 50 Vdc | 7 A | 60 dB | 70 dB | No |
| QPI-12LZ | 10 — 80 Vdc | 7 A | 40 dB | 70 dB | No |
- cTÜVus Certificate – QPI Family
- CB Certificate
- CE Mark — Low Voltage Directive (2006/95/EC) and RoHs Recast Directive (2011/65/EU)
The QPI-3 active EMI filter attenuates conducted common-mode(CM) and differential-mode (DM) noise over the CISPR22 frequency range of 150 kHz to 30 MHz. The product is designed for use on a 24 Vdc bus (10 – 40 Vdc).
The QPI-3’s 7 A rating supports multiple DC-DC converter loads up to an ambient temperature of 110°C. At a 100°C PCB temperature the QPI-3 supports 6 A loads. Designed for the telecom and ITE bus range, the QPI-3 supports the PICMG® 3.0 specification for filtering system boards to the EN55022 Class B limits.
- Active Input EMI Filter
- LGA SiP / 25 mm x 25 mm
- Yes
- 10 V to 40 V
- 100 V
- 7 A
- 65 dB
- 80 dB
- -40°C to +125°C
- 707 V
- >65 dB CM attenuation at 250 kHz
- >80 dB DM attenuation at 250 kHz
- 40 Vdc (max input)
- 7 Amp rating
- 100 Vdc surge 100 ms
- 707 Vdc Hi-pot hold off to Shield Plane
- 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package)
- SMT Land Grid Array (LGA)
- -40° to +125°C PCB temperature
- Active filtering reduces volume and height
- Efficiency: 99% at full load
- Connect in series for higher attenuation
- cTÜVus approved
- QPI-3LZ Data Sheet – 7 Amp Active EMI Filter for 24 Vdc Bus
- QPI-3-CB1 Carrier Board – Compatible evaluation board for 7 A, 24 V Input Active EMI Filter
Active EMI Input Filter Evaluation Boards
- QPI-3-EVAL1 Evaluation Board – Universal evaluation board for 7 A, 24 V Input Active EMI Filter
The QPI-5 active EMI filter attenuates conducted common-mode (CM) and differential-mode (DM) noise over the CISPR22 frequency range of 150 kHz to 30 MHz. The product is designed for use on a 24 Vdc bus (10 – 40 Vdc).
The QPI-5’s 14 A rating supports multiple DC-DC converter loads up to an ambient temperature of 65°C. At a 100°C PCB temperature the QPI-5 supports 12 A loads. Designed for a nominal 24 V bus, the QPI-5 supports industrial and MIL-COTS applications.
- Active Input EMI Filter
- LGA SiP / 25 mm x 25 mm
- Yes
- 10 V to 40 V
- 100 V
- 14 A
- 60 dB
- 75 dB
- -40°C to +125°C
- 707 V
- >60 dB CM attenuation at 250 kHz
- >75 dB DM attenuation at 250 kHz
- 40 Vdc (max input)
- 14 Amp rating
- 100 Vdc surge 100 ms
- 707 Vdc Hi-pot hold off to Shield Plane
- 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package)
- SMT Land Grid Array (LGA)
- -40° to +125°C PCB temperature
- Active filtering reduces volume and height
- Efficiency: >99% at full load
- Connect in series for higher attenuation
- cTÜVus approved
- QPI-5LZ Data Sheet – 14 Amp Active EMI Filter for 24 Vdc Bus
- QPI-5-CB1 Carrier Board – Compatible evaluation board for 14 A, 24 V Input Active EMI Filter
Active EMI Input Filter Evaluation Boards
- QPI-5-EVAL1 Evaluation Board – Universal evaluation board for 14 A, 24 V Input Active EMI Filter
The QPI-6 active EMI filter attenuates conducted common-mode (CM) and differential-mode (DM) noise over the CISPR22 frequency range of 150 kHz to 30 MHz. The product is designed for use on a 48 Vdc bus (36 – 76 Vdc).
The QPI-6’s 14 A rating supports multiple DC-DC converter loads up to an ambient temperature of 65°C. At a 100°C PCB temperature the QPI-6 supports 12 A loads. Designed for the telecom and ITE bus range, the QPI-6 supports the PICMG ® 3.0 specification for filtering system boards to the EN55022 Class B limits.
- Active Input EMI Filter
- LGA SiP / 25 mm x 25 mm
- Yes
- 30 V to 80 V
- 100 V
- 14 A
- 40 dB
- 80 dB
- -40°C to +125°C
- 1,500 V
- >40 dB CM attenuation at 250 kHz
- >80 dB DM attenuation at 250 kHz
- 80 Vdc (max input)
- 14 Amp rating
- 100 Vdc surge 100 ms
- 1,500 Vdc Hi-pot hold off to Shield Plane
- 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package)
- SMT Land Grid Array (LGA)
- -40° to +125°C PCB temperature
- Active filtering reduces volume and height
- Efficiency: >99% at full load
- Connect in series for higher attenuation
- cTÜVus approved
- QPI-6LZ Data Sheet – 14 Amp Active EMI Filter for 48 Vdc Bus
- QPI-6-CB1 Carrier Board – Compatible evaluation board for 14 A, 48 V Input Active EMI Filter
Active EMI Input Filter Evaluation Boards
- QPI-6-EVAL1 Evaluation Board – Universal evaluation board for 14 A, 48 V Input Active EMI Filter
The QPI-8 is the industry’s first System-in-Package (SiP) designed to integrate a total Hot-Swap function with an active EMI filter. The product aligns with the AdvancedTCA™ PICMG® 3.0‚ requirements for hot insertion and board level conducted noise limitations. The EMI filter provides active conducted common-mode (CM) and differential-mode (DM) noise attenuation from 150 kHz to 30 MHz. The QPI-8 is designed for use on a 48 or 60 Vdc bus (36 – 76 Vdc). The inrush current limit and circuit breaker are designed to satisfy the 200 W per board PICMG® 3.0 limit up to 70°C PCB temperature around the QPI-8. The undervoltage and overvoltage thresholds can be trimmed separately via the UVEN and OV inputs using external series resistors. The Power Good active-high output provides optocoupler drive for a converter’s active-low enable or active-high by connecting the diode in series with the Power Good output. The QPI-8 is available in a 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package) with LGA mounting. QPI-EVAL1 kits are available with a mounted QPI-8 and screw terminals for easy insertion and testing.
- Active Input EMI Filter with Integrated Hot-Swap
- LGA SiP / 25 mm x 25 mm
- Yes
- 32 V to 76 V
- 100 V
- 6 A
- 40 dB
- 70 dB
- -40°C to +125°C
- 1,500 V
- >40 dB CM attenuation at 250 kHz
- >70 dB DM attenuation at 250 kHz
- 80 Vdc (max input)
- 100 Vdc surge 100 ms
- 1,500 Vdc Hi-pot hold off to Shield Plan
- -48 V and -60 V Telecom/ATCA BUS capability
- Provides safe powered backplane board insertion
- 6 A breaker with delay plus 12 A limiter
- 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package)
- QPI-8L Land Grid Array (LGA)
- -40° to +125°C PCB temperature
- Hot-Swap and filter combination saves space
- Efficiency: >99%
- Connects between OR’ing diodes and power converter input hold-up capacitors
- cTÜVus approved
- QPI-8LZ Data Sheet – 6 Amp Active EMI Filter, with integrated Hot-Swap, for 48 Vdc Bus
- QPI-8-CB1 Carrier Board – Compatible evaluation board for 6 A, 48 V Input Active EMI Filter with Hot-Swap
Active EMI Input Filter Evaluation Boards
- QPI-8-EVAL1 Evaluation Board – Universal evaluation board for 6 A, 48 V Input Active EMI Filter with Hot-Swap
The QPI-21 actice EMI filter attenuates conducted commonmode (CM) and differential-mode noise over the CISPR22 frequency range of 150 kHz to 30 MHz. The product is designed for use in 48Vdc bus (36-76 Vdc) systems, with 100 Vdc surge capability. The QPI-21`s 14A rating supports multiple DC-DC converter loads 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.
The QPI-21 is available as a lidded or open-fram SiP with LGA mounting. Evaluation boards are available to allow for quick in-circuit testing of the QPI-21LZ within existing designs.
- LGA SiP / 25 mm x 25 mm
- Yes
- 36 V to 76 V
- 100 V
- 14 A
- 45 dB
- 80 dB
- -40°C to +125°C
- 1,500 V
- >45 dB CM attenuation at 250 kHz
- >80 dB DM attenuation at 250 kHz
- 80 Vdc (max input)
- 100 Vdc surge 100 ms
- 1,500 Vdc Hi-pot hold off to Shield Plan
- -48 V and -60 V Telecom/ATCA BUS capability
- Provides safe powered backplane board insertion
- 6 A breaker with delay plus 12 A limiter
- 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package)
- QPI-8L Land Grid Array (LGA)
- -40° to +125°C PCB temperature
- Hot-Swap and filter combination saves space
- Efficiency: >99%
- Connects between OR’ing diodes and power converter input hold-up capacitors
- cTÜVus approved
- QPI-21LZ Data Sheet – 14 Amp Active EMI Filter SiP for 48 Vdc Bus
- QPI-21-CB1 Carrier Board – Compatible evaluation board for 14 A, 48 V Input Active EMI Filter
The QPI-10 includes the total Hot-Swap function with an EMI filter for V•I Chip applications. The product aligns with the AdvancedTCA™ PICMG3.0® requirements for hot insertion and board level conducted noise limitations. The EMI filter provides conducted common-mode (CM) and differential-mode (DM) noise attenuation from 150 kHz to 30 MHz. The QPI-10 is designed for use on a 48 or 60 Vdc bus (36 – 76 Vdc). The in-rush current limit and circuit breaker are designed to satisfy the 200 W per board PICMG3.0® limit up to 70°C PCB temperature around the QPI-10. The undervoltage and overvoltage thresholds can be trimmed separately via the UVEN and OV inputs using external series resistors. The QPI-10 provides two Power Good signals, with one referenced to the input ground and the other to the output ground, which can be used to enable other circuits along with the V•I Chip converter. The QPI-10 is available in a 1.0″ x 1.0″ x 0.2″ SiP (System-in-Package) with LGA mounting.
- V•I Chip Optimized Input EMI Filter with Integrated Hot-Swap
- LGA SiP / 25mm x 25mm
- Yes
- 36V to 76V
- 100V
- 6A
- 40dB
- 60dB
- -40°C to +100°C
- 1500V
- >40 dB CM attenuation at 1 MHz
- >60 dB DM attenuation at 1 MHz
- 80 Vdc (max input)
- 100 Vdc surge 100 msec
- 1500 V Hi-pot hold off to Shield
- 6 A breaker with delay plus 12 A limiter
- 25 mm x 25 mm x 4.5 mm SiP (System-in-Package)
- Low profile LGA package
- -40° to +100°C PCB temperature
- Hot Swap & filter combined saves PCB space
- Efficiency: ~99%
- Connects between ORing diodes & power
conversion input hold-up capacitance - cTÜVus approval
- QPI-10LZ Data Sheet – 6 Amp EMI Filter, with integrated Hot-Swap for 48 V V•I Chip products
The QPI-11 EMI filter is specifically designed to attenuate conducted common-mode (CM) and differential-mode (DM) noise of the Vicor V•I Chip products to comply with the CISPR22 standard requirements for conducted noise measurements. The filter is designed to operate up to 50 Vdc and supports 7 A loads up to 85°C without derating. Designed for the military and industrial bus range, the V•I Chip EMI Filter supports the PICMG® 3.0 specification for filtering system boards to the EN55022 Class B limits. Two of these filters can be connected in parallel to double current capability up to 14 A with a minor effect on attenuation at 1 MHz.
- V•I Chip Optimized Input EMI Filter
- LGA SiP / 12.4 mm x 25 mm
- Yes
- 5 V to 50 V
- 100 V
- 7 A
- 60 dB
- 70 dB
- -40°C to +125°C
- 707 V
- >60 dB CM attenuation at 1 MHz
- >70 dB DM attenuation at 1 MHz
- 40 Vdc (max input)
- 100 Vdc surge 100 ms
- 750 Vdc Hi-pot hold off to shield plane
- 7 A rating
- 12.4 x 25 x 4.5 mm SiP (System-in-Package)
- Low profile LGA package
- -40° to +125°C PCB temperature
- Efficiency: >99%
- QPI-11LZ Data Sheet – 7 Amp V•I Chip products
- QPI-11-CB1 Filter Carrier Board – Compatible with 24 V Input V•I Chip Module «-CB» Boards, up to 7 Amps
The QPI-12 EMI filter is specifically designed to attenuate conducted common-mode (CM) and differential-mode (DM) noise comply with the CISPR22 standard requirements for conducted noise measurements. The filter is designed to operate up to 76 Vdc and supports 7A loads up to 85°C without de-rating. Designed for the telecom bus range, the
V•I Chip EMI Filter supports the PICMG® 3.0 specification for filtering system boards to the EN55022 Class B limits.
Two of these filters can be connected in parallel to double current capability up to 14 Amps while still maintaining the minimum specified attenuation performance.
- V•I Chip Optimized Input EMI Filter
- LGA SiP / 12.4 mm x 25 mm
- Yes
- 5 V to 80 V
- 100 V
- 7 A
- 45 dB
- 75 dB
- -40°C to +125°C
- 1,500 V
- >45 dB CM attenuation at 1 MHz
- >75 dB DM attenuation at 1 MHz
- 80 Vdc (max input)
- 100 Vdc surge 100 ms
- 1,500 Vdc Hi-pot hold off to Shield Plane
- 7 Amp rating
- 12.4 x 25 x 4.5 mm SiP (System-in-Package)
- Low profile LGA Package
- -40° to +125°C PCB temperature
- Efficiency: >99%
- cTÜVus Certified
- QPI-12LZ Data Sheet – 7 Amp V•I Chip EMI Filter for 48 V V•I Chip products
- QPI-12-CB1 Filter Carrier Board – Compatible with 48 V input V•I Chip Module «-CB» Boards, up to 7 Amps
