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QPI-6 데이터시트 PDF




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부품번호 QPI-6 기능
기능 14 A Active EMI Filter SIP
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QPI-6 데이터시트, 핀배열, 회로

14 A Active EMI Filter SIP for 48 Vdc Bus
QPI-6
QUIETPOWER
Description:
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 48 Vdc bus (36 76 Vdc) systems, with
100 Vdc surge capability. The QPI-6’s 14 A rating supports
multiple DC-DC converter loads up to an ambient
temperature of 65°C without de-rating. 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.
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-6 is available as a
lidded or an open-frame SiP
(System-in-Package) with
LGA mounting. Evaluation
boards are available to allow
for quick in-circuit testing of
the QPI-6LZ within an
existing system design.
Figure 1 - QPI-6LZ
(~1 in2 area)
Features:
40 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
-40° to +125°C Ambient temperature (see Figure 12)
Efficiency >99%
Connect in series for higher attenuation
TÜV Certified
Applications
ATCA blades
Telecom base stations
IBA & distributed power
Network switches and routers
Optical line-cards
TD-SCMA wireless infrastructure
Typical Application:
Figure 2 Typical QPI-6 application schematic with a Vicor brick converter. (1)
Note 1: CB1 capacitor, referenced in all schematics, is a 47uF electrolytic; United Chemi-Con EMVE101ARA470MKE0S or equivalent.
CY1 to CY4, referenced in all schematics, are 4.7nF hi-voltage safety capacitors; Vishay VY1472M63Y5UQ63V0 or equivalent.
CIN is the manufacturer’s recommended value for input capacitor.
Picor Corporation · picorpower.com
QPI-6
Rev 2.6, Page 1 of 13




QPI-6 pdf, 반도체, 판매, 대치품

QPI-6
QUIETPOWER
EMI Management
The more effectively EMI is managed at the source, namely
the power converter, the less EMI attenuation the filter will
have to do. The addition of “Y” capacitors to the input and
output power nodes of the converter will help to limit the
amount of EMI that will propagate to the input source.
favor one topology versus another. The EMI generated by
the “base-plate” configuration is much greater than that
generated by the “open-frame”. Selecting the right topology
will greatly reduce the amount of EMI signal that needs to be
filtered.
Figure 2 shows the base-plate topology of re-circulating “Y”
caps. Here, CY1 to CY4 are connected to each power node of
the dc-dc converter, and then are commoned together on a
copper shield plane created under the converter. The
addition of the copper shield plane helps in the containment
of the radiated EMI, converting it back to conducted EMI and
shunting it back to its source.
Figure 4 An unfiltered converter’s response to “open-frame”
(light blue) and “base-plate” (purple) EMI configurations.
There are two basic topologies for the connection of the re-
circulating “Y” capacitors, referred to as “open-frame” and
“base-plate”. Figure 4 illustrates how a converter can
The RY resistor, connected between the shield plane and the
QPI’s shield pin, provides an impedance that makes the QPI’s
common mode noise cancelation signal more effective at
removing the common mode noise that would normally
return to the shield/earth connection. It is important when
laying out the QPI that the RY resistor connects to the QPI’s
shield pin before making the connection to earth ground.
In Figure 5, the open-frame topology is shown where the “Y”
capacitors (CY1 and CY2) re-circulate the EMI signals between
the positive input and output, and the negative input and
output nodes of the power conversion stage.
Figure 5 - Typical 'open-frame" application.
Picor Corporation · picorpower.com
QPI-6
Rev 2.6, Page 4 of 13

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QPI-6 전자부품, 판매, 대치품

QPI Application Circuits:
Filtering Dual Converters
QPI-6
QUIETPOWER
Figure 13 The QPI-6 filtering dual supplies, using a single RY resistor. (4)
The shield plane under the two converters in Figure 13 should
be one contiguous plane under both. The circuit in Figure 13 is
capable of filtering more converters than shown, up to the
maximum current limit of the QPI-6. In Figure 14, a separate
shield plane is required for each converter along with a
separate RY resistor.
The QPI-6 is not designed to be used in parallel with another
QPI-6 to achieve a higher current rating, but it can be used
multiple times within a system design.
Filtering Parallel Converters
Figure 14 Dual QPI-6’s filtering paralleled converters feeding a common load. (4)
Note 4: In Figures 12 and 13; CIN1 and CIN2, CY1 through CY8, should be the value and voltage rating recommended by the converter’s manufacturer.
Picor Corporation · picorpower.com
QPI-6
Rev 2.6, Page 7 of 13

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