QPI-21LZ Datasheet, PDF (1/13 Pages) Vicor Corporation – 14A Active EMI Filter SIP for 48 Vdc Bus

 
14A Active EMI Filter SIP for 48 Vdc Bus
QPI‐21

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 14A 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 in
blade applications.
The QPI‐21 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‐21LZ within an
existing system design.
Figure 1 ‐ QPI‐21LZ
(~1 in² area)
Typical Application:
CX1
Features:
 45 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 11)
 Efficiency >99%
 Connect in series for higher attenuation
 Pads for additional X filtering capacitance
 TÜV Certification ⁽¹⁾
Note 1: Certification is in process. Use of the CE mark for graphical purposes
only in Figure 1
Applications
 ATCA blades
 Telecom base stations
 IBA & distributed power
 Network switches and routers
 Optical line‐cards
 TD‐SCMA wireless infrastructure

BUS+
CB1
BUS-
Chassis/Shield
XY+
BUS+
XY-
QPI+

BUS-
QPI-
Shield
CY 1
CIN
CY 2
IN+
OUT+
SENSE+
PC
SC
PR
SENSE-
IN-
OUT-
CY 3
Shield Plane
LOAD
CY 4
Figure 2 – Typical QPI‐21 circuit with a Vicor brick converter. Optional X (CX1) filter capacitor shown. ⁽²⁾
Note 2: CB1, CX1 capacitors, referenced in all schematics, are 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 converter manufacturer’s recommended value for input capacitor.
Picor Corporation ∙ picorpower.com
QPI‐21
Preliminary Rev 1.3, Page 1 of 13