Rev 1.5

vicorpower.com

Page 9 of 15

08/2015

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QPI-21

Shield

BUS+

QPI+

BUS-

QPI-

IN+

IN-

OUT+

OUT-

Shield Plane

BUS+

BUS-

Chassis/Shield

CB1

CIN 1

LOAD 1

CY1

CY2

CY3

CY4

+

+

PC

PR

SENSE+

SC

SENSE-

IN+

IN-

OUT+

OUT-

Shield Plane

CIN 2

LOAD 2

CY5

CY6

CY7

CY8

+

PC

PR

SENSE+

SC

SENSE-

QPI-21

The shield plane under the two converters in Figure 15 should be

one contiguous plane under both. The circuit in Figure 15 is capable

of filtering more converters than shown, up to the maximum current

limit of the QPI-21. In Figure 16, the QPI+ and QPI- outputs of each

filter should not be connected in parallel. The QPI-21 is not designed

to be used in parallel with another QPI-21 to achieve a higher

current rating, but it can be used multiple times within a

system design.