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QPI-21 Schematic ( PDF Datasheet ) - Picor

Teilenummer QPI-21
Beschreibung Active EMI Input Module
Hersteller Picor
Logo Picor Logo 




Gesamt 15 Seiten
QPI-21 Datasheet, Funktion
Active EMI Input Module for 48 Vdc Bus
Quiet-Power®
QPI-21
S
C NRTL US
Product Description
The QPI-21 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 in 48 Vdc bus (36 – 76 Vdc) systems, with
100 Vdc surge capability. The QPI-21’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-21 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 component size and therefore reduces the overall
package size. The Picor QPI-21 smaller size saves valuable
board real estate and the reduced height enhances airflow.
The QPI-21 is available as a lidded or an open-frame SiP
(System-in-Package) module with LGA mounting. Evaluation
boards are available to allow for quick in-circuit testing of the
QPI-21LZ within an existing system design.
Features
45 dB CM attenuation at 250 KHz (50 Ω)
80 dB DM attenuation at 250 KHz (50 Ω)
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 14)
Efficiency >99%
Connect in series for higher attenuation
Pads for additional X filtering capacitance
cTÜVus approved to UL/CSA 60950-1 and EN 60950-1
CE marked to the LVD and RoHS Recast Directive
as applicable
QuietPower®
QPI-21LZ
U.S. PATENT NO. 6,898,092
Figure 1 — QPI-21LZ (~1 in2 area)
Typical Applications
Applications
ATCA blades
Telecom base stations
IBA & distributed power
Network switches and routers
Optical line-cards
TD-SCMA wireless infrastructure
CX1
BUS+
CB1
BUS-
Chassis/Shield
XY+
BUS+
XY-
QPI+
BUS-
QPI-
Shield
CY1
IN+
CIN
PC
PR
OUT+
SENSE+
SC
SENSE-
IN-
CY2
OUT-
CY3
Shield Plane
LOAD
CY4
Figure 2 — Typical QPI-21 circuit with a Vicor brick converter. Optional X (CX1) filter capacitor shown.[b]
[b] CB1, CX1 capacitors, referenced in all schematics, are a 47uF electrolytic; United Chemi-Con EMVE101ARA470MKE0S or equivalent.
Quiet-Power®
Page 1 of 15
Rev 1.5
08/2015
vicorpower.com
800 927.9474






QPI-21 Datasheet, Funktion
Attenuation Plots All converters have their output ground connected to chassis/earth ground.
QPI-21
Figure 6 — Ericsson PKM 4402NG using open-frame “Y” capacitors on
QPI-21-CB1 evaluation board, 414 W load
Figure 7 — Ericsson PKM 4402NG using open-frame “Y” capacitors on
QPI-21-CB1 evaluation board, 414 W load, converter’s output
ground connected to earth
Figure 8 — Ericsson PKM4304B PI using base-plate “Y” capacitors
with a 360 W load
The EMI results shown in Figures 6 and 7 are of the total noise
measured using the QPI-21 in an "open-frame" topology, as shown
in Figure 5, with and without the converter's ground tied to
chassis/earth.
The EMI results shown in Figures 8 and 9 are of the total noise
measured using the QPI-21 in an "base-plate" topology, as shown in
Figure 2, with and without the optional CX1 capacitor in use.
Using EMI splitters, the peak EMI at the fundamental switching
frequency was determined to be mostly differential mode current.
The addition of a 47 μF capacitor reduced the total peak by about
6dBuV, as shown in Figure 10.
Figure 9 — Ericsson PKM4304B PI using base-plate “Y” capacitors
with a 360 W load, CX1 = 47uF (see Figure 2).
Quiet-Power®
Page 6 of 15
Rev 1.5
08/2015
Figure 10 — CM Peak Measurements with a 10 µF and 47 µF
CX1 capacitor
vicorpower.com
800 927.9474

6 Page









QPI-21 pdf, datenblatt
Mechanicals
QPI-21
0.006" [0.15mm] max.
0.998" [25.35 mm]
QPI-21LZ
U.S. and Foreign Patents/Patents Pending
Lot #
Date Code
Pin 1 indicator
0.998" [25.35 mm]
Figure 20 — Lidded Package Dimensions, tolerance of ±0.004”
0.206" [5.23 mm]
0.006" [0.15mm] max.
21LZ-01
0.979" [24.867 mm]
π
Pin 1
0.979" [24.867 mm]
Figure 21 — Open-frame Package dimensions, tolerance of ±0.004”. Pick and Place from label center.
Quiet-Power®
Page 12 of 15
Rev 1.5
08/2015
vicorpower.com
800 927.9474
0.174 [4.420 mm]

12 Page





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