QPI™ Filters
QPI-3LZ
S
C
NRTL US
7A Active EMI Filter SiP for 24VDC Bus
Product Description
Features & Benefits
• 65dB CM attenuation at 250kHz (50Ω)
• 80dB DM attenuation at 250kHz (50Ω)
• 40VDC (max input)
The QPI-3 active EMI filter attenuates conducted common-mode
(CM) and differential-mode (DM) noise over the CISPR22 frequency
range of 150kHz to 30MHz. The product is designed for use on
24VDC bus (10 – 40VDC) systems, with 100VDC surge capability. The
QPI-3’s 7A rating supports multiple DC-DC converter loads up to
an ambient temperature of 110°C without de-rating. 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.
• 100VDC surge 100ms
• 707VDC hipot hold off to shield plane
• 7A rating
• Low-profile LGA package
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.
•
~1in2 area
• –40 to +125°C ambient temperature (see Figure 9)
• Efficiency >99%
The QPI-3 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-3LZ within
an existing system design.
• Connect in series for higher attenuation
• TÜV certified
Applications
•
•
•
•
Industrial Bus Supplies
Telecom Base Stations
IBA & Distributed Power
COTS Systems
Package Information
• 25.3 x 25.3 x 5.2mm lidded SiP (System-in-Package)
• 24.9 x 24.9 x 4.4mm open-frame SiP
Typical Application
BUS+
BUS–
QPI+
QPI–
IN+
OUT+
SENSE+
SC
BUS+
BUS–
CIN
CB1
PC
PR
QPI-3
LOAD
CY4
SENSE–
OUT–
Shield
IN–
CY1
RY
CY2
CY3
Chassis/Shield
Shield Plane
QPI-3 schematic with a Vicor Brick® converter. [a]
[a] CB1 capacitor, referenced in all schematics, is a 47µF electrolytic; United Chemi-Con EMVE101ARA470MKE0S or equivalent.
CY1 to CY4, referenced in all schematics, are 4.7nF high-voltage safety capacitors; Vishay VY1472M63Y5UQ63V0 or equivalent.
CIN is the manufacturer’s recommended value for input capacitor.
QPI™ Filters
Page 1 of 15
Rev 2.9
03/2020