Rev 1.5

vicorpower.com

Page 1 of 15

08/2015

800 927.9474

Active EMI Input Module for 48 Vdc Bus

QPI-21

S

NRTL

CUS

Product Description

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

Applications

Typical Applications

IN+

IN-

PR

OUT+

OUT-

PC

SC

SENSE+

SENSE-

Shield Plane

BUS+

BUS-

Chassis/Shield

CB1

CY1

CY2

LOAD

CY3

CY4

CIN

Shield

BUS+

QPI+

BUS-

QPI-

XY+

XY-

CX1

QPI-21LZ

U.S. PATENT NO. 6,898,092