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Evaluation Board for Active EMI Filters with Hot-Swap
The QPI-8 Evaluation board provides an easy to use
evaluation platform for testing the QPI-8 EMI filter with
Hot-Swap in existing or prototype systems. The board
comes with a mounted QPI-8, RPG (PWRGD=Power Good)
pull-up resistor, ROV and RUVEN jumper resistors, and
screwterminal blocks for electrical connections.
External resistors can be used in series with the UVEN and
OV inputs to the BUS+ terminal to increase the threshold
voltages or connected directly for minimum specified
thresholds. Values can be determined using figure 6 of the
datasheet to trim these parameters up to the desired
levels. Optional C2 capacitor is described for hold-up
considerations during a power dropout and C3 can be
added to filter nuisance over voltage low energy spikes
that do not merit a shutdown condition.
Please refer to the QPI-8 datasheet for detailed
description and typical operation of the product when
applying this evaluation board. Specifically refer to Figures
9a and 9b in the datasheet for detailed application
circuits.
Also refer to QPI-AN1 for critical PCB layout and EMI
considerations for QPI products in general but refer to the
individual product specifications for their PCB layout
footprint and pin-out.
J1
PWRGD
OV
UVEN
SIGNALS
75K
3
2
1
RPG
0
ROV
RUVEN
0
C3
11
OV
PWRGD
10
12
BUS+
13
BUS+
C1
47 碌F
NC
9
BUS-
QPI+
8
QPI+
7
14
UVEN
C2
J2
BUS+
BUS-
SHIELD
INPUT
3
2
1
QPI-8L
15
SW
4
SHIELD
16
BUS-
1
BUS-
1
J3
QPI+
QPI-
SHIELD
OUTPUT
QPI-
6
QPI-
5
SW
3
SW
2
3
BUS-
Figure 1
- Evaluation board schematic
Picor Corporation 鈥?www.picorpower.com
2
QPI-8 EVAL1 Data Sheet Rev. 1
Page 1 of 2
VICOR
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