鈩?/div>
7 Amp Active EMI Filter for 48 V DC Bus
Description
The QPI-4 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-4鈥檚 7 A rating supports multiple
DC-DC converter loads up to a PCB temperature of
60掳C. At a 100掳C PCB temperature the QPI-4 supports
6 A loads. Designed for the telecom and ITE bus range,
the QPI-4 supports the PICMG
庐
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-4 is available in a 1.0" x 1.0" x 0.2" SiP (System
in Package) with LGA mounting. QPI-4-EVAL1 kits are
available for testing the QPI-4. The evaluation board
has a mounted QPI-4 with screw terminals for quick
in-circuit testing.
Check
picorpower.com
for the QPI-4-EVAL1 evaluation
board and the QPI-AN1 Application Note.
Features
鈥?>40 dB CM attenuation at 250 kHz
鈥?>70 dB DM attenuation at 250 kHz
鈥?80 Vdc (max input)
鈥?7 Amp rating
鈥?100 Vdc surge 100 ms
鈥?1,500 Vdc Hi-pot hold off to Shield Plane
鈥?1.0鈥?x 1.0鈥?x 0.2鈥?SiP (System-in-Package)
鈥?SMT Land Grid Array (LGA)
鈥?/div>
-40掳 to +100掳C PCB temperature
(See Fig. 5)
鈥?/div>
Active filtering reduces volume and height
鈥?/div>
Efficiency >99% at full load
鈥?/div>
Connect in series for higher attenuation
鈥?/div>
T脺V approved
Applications
鈥?ATCA blades
鈥?Telecom base stations
鈥?IBA & distributed power
Typical Application
QPI Performance
10
鈩?
1/4 W
Figure 1
- QPI basic input bus filter circuit.
Read important
note on page 3 for Layout and Circuit Considerations.
Picor Corporation 鈥?www.picorpower.com
Figure 2
- Attenuation curves showing common-mode and
differential-mode attenuation.
QPI-4L Data Sheet Rev. 3.0 Page 1 of 8
QPI-4L相关型号PDF文件下载
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