®
QPI-12
QUIETPOWER
®
7 A V·I Chip EMI Filter
Description
The QPI-12 EMI filter is specifically designed to
attenuate conducted common-mode (CM) and
differential-mode (DM) noise of Vicor’s V•I Chip
products to comply with the CISPR22 standard
requirements for conducted noise measurements. The
filter is designed to operate up to 80 Vdc and supports
7 A loads up to 60°C without derating.
Designed for the telecom bus range, the V•I Chip EMI
®
Filter supports the PICMG 3.0 specification for
filtering system boards to the EN55022 Class B limits.
Features
• > 40 dB CM attenuation at 1 MHz
• > 60 dB DM attenuation at 1 MHz
• 80 Vdc (max input)
• 100 Vdc surge 100 ms
• 1,500 Vdc hipot hold off to shield plane
• 7 A rating
• 12.4 x 25 x 4.5 mm SiP (System-in-Package)
• Low profile LGA package
• -40° to +100°C PCB temperature (see
Figure 6)
• Efficiency >99%
• TÜV Certified
Applications
• Telecom and ATCA boards
• V•I Chip input power filter
Figure 1
– QPI-12, less than 1/2 in
2
.
Cy1
Bus+
Cbus
Bus+ Out+
Vi+
Cin
Vo+
Vi+
Vo+
Load
QPI-12
Bus– Out–
Shield
PRM
Vi–
Vo–
VTM
Vi–
Vo–
Bus–
Shield
Cy2
Cin:
Recommended input capacitance per Vicor requirement.
Cy1 & Cy2:
4.7 nF, or recommended per Vicor requirement.
Cbus:
47 uF, 50 V electrolytic in parallel with 2.2 µF, 100 V ceramic.
Figure 2
– QPI-12 Typical application schematic
Figure 3
– QPI-12 network analyzer attenuation curves
Picor Corporation • www.picorpower.com
QPI-12 Data Sheet Rev. 1.8 Page 1 of 4
VICOR [ VICOR CORPORATION ]
