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Active EMI Input Filters (QPI Series)
For 24/28 V and 48/60 V BUS Applications
®
Features
C
S
US
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Up to 65 dB CM attenuation at 250 kHz
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Up to 80 dB DM attenuation at 250 kHz
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Efficiency: >99% at full load
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High density, low profile LGA package
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Integrated Hot-Swap in select models
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-40 to +100°C PCB temperature
Full: 25 x 25 x 4.5 mm
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TÜV approved
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Saves up to 50% board space vs. standard filters
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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.
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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.
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Networking & communications
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Fan-tray assemblies
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Telecom
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Industrial
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Military
Part Numbering
Part Number
(-01 = Open Frame)
Input
Voltage
Nominal
Range
Current
Rating
CM Attenuation DM Attenuation
Hipot Integrated Package
@250 kHz
@250 kHz
Hot-Swap
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
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
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