Rev 1.5

vicorpower.com

Page 3 of 15

08/2015

800 927.9474

QPI-21

Pad Descriptions

XY+

XY-

QPI+

QPI-

BUS+

BUS-

Shield

3

11

12

4

2

10

1

9

5

13

6

7

8

14

15

16

Pin Name

Name

Description

12, 13, 14

BUS+

Positive bus potential

1, 5, 16

BUS-

Negative bus potential

7, 8, 9

QPI+

Positive input to the converter

4, 5, 6

QPI-

Negative input to the converter

2, 3

Shield

Shield connects to the system chassis or to a safety ground.

10

XY-

Negative rail node for additional X filtering capacitance. Adding Y capacitors from this pin to ground

is not recommended.

11

XY+

Positive rail node for additional X capacitance. Adding Y capacitors from this pin to ground is not

recommended.