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(R)
QPI-12
QUIETPOWER (R)
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 60C without derating. Designed for the telecom bus range, the V*I Chip EMI (R) 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 +100C PCB temperature (see Figure 6) * Efficiency >99% * TUV Certified
Applications
* Telecom and ATCA boards * V*I Chip input power filter
Figure 1 - QPI-12, less than 1/2 in2.
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 F, 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
Absolute Maximum Ratings - Exceeding these parameters may result in permanent damage to the product.
Pins Bus+ to Bus- Bus+ to Bus- BUS+ / BUS- to shield plane QPI+ to QPI- Package Package Package Package Package Package All Pins Parameter Input voltage Input voltage BUS inputs to shield hipot Input to output current Power dissipation Operating temperature Thermal resistance Thermal resistance Storage temperature Reflow temperature ESD 20 s exposure HBM -2 Continuous @ 25C @ 25C PCB to filter interface Free air PCB Layout Fig. 7 -55 Notes Continuous 100 ms transient Min -80 -100 -1500 Max 80 100 1500 7 1.50 100 75 30 125 245 +2 Units Vdc Vdc Vdc Adc W C C/W C/W C C kV
Electrical Characteristics - Parameter limits apply over the operating PCB temperature range unless otherwise noted
Parameter Bus+ to Bus- input range Bus+ to Out+ voltage drop Bus- to Out- voltage drop Common mode attenuation Differential mode attenuation Input bias current at 80 V
Note 1: See Figure 6 for current derating curve.
Notes Measured at 7 A Measured at 7 A
(1) (1)
Min
Typ 110 110
Max 76
Units Vdc mVdc mVdc dB dB
Measured at 7 A
VBUS = 48 V Frequency = 1.0 MHz VBUS = 48 V Frequency = 1.0 MHz Input current from Bus+ to Bus-
40 60 10
A
SiP Package Outline Pad Description
Pin Number 8, 9 1, 10 6, 7 4, 5 2, 3
0.1773 0.9843 0.2000 0.184 0.148 0.000 0.052 0.184 0.2000
Name Bus + Bus - Out + Out - Shield
Description Positive bus potential Negative bus potential Positive input to the converter Negative input to the converter Shield connects to system chassis or safety ground.
6 5 4
0.432 0.300
7
8
9 10 1
0.300 0.432 0.4882
1/2 SIP Package (Bottom View) 3
0.100 0.000
2
0.100
Ordering Information
Part Number QPI-12LZ Description
0.1000
QPI-12 LGA Package, RoHS Compliant QPI-12 LGA, RoHS Compliant QPI-12LZ-01 Open Frame Package
0.1000
Pad Detail: 10 Places
Picor Corporation * www.picorpower.com
QPI-12 Data Sheet Rev. 1.8 Page 2 of 4
EMI Performance
Figure 4 - Total conducted noise of P048K048T24IF & V048K120T025 with QPI-12 connected as shown in Figure 2. Output load = 170W: Cy1= Cy2= 4.7 nF & CBUS = 47 F electrolytic in parallel with 2.2 F ceramic.
Figure 5 -Total conducted noise of BCM (B048A120T20) with QPI-12. Output load = 144 W. Same setup as in Figure 2, with the BCM replacing the VTM/PRM pair.
When laying out the QPI-12L, care must be taken such that the input and output signal polygons do not overlap each other on lower layers.
Figure 6 - Current vs. PCB temperature derating curve. Picor Corporation * www.picorpower.com
Figure 7 - Typical QPI-12L polygon layout. QPI-12 Data Sheet Rev. 1.8 Page 3 of 4
Figure 5 - Recommended mounting on a 2 layer board
QPI-12 PCB Layout Recommendations
The filtering performance of the QPI-11 and -12 is sensitive to capacitive coupling between its input and output pins. Parasitic plane capacitance must be kept below 1 pico-Farad between inputs and outputs using the layout shown above and the recommendations described below to achieve maximum conducted EMI performance. To avoid capacitive coupling between input and output pins, there should not be any planes or large traces that run under both input and output pins, such as a ground plane or power plane. For example, if there are two signal planes or large traces where one trace runs under the input pins, and the other under the output pins, and both planes over lap in another area, they will cause capacitive coupling between input and output pins. Also, planes that run under both input and outputs pins, but do not cross, can cause capacitive coupling if they are capacitively by-passed together. Figure 5 shows the recommended pcb layout on a 2 layer board. Here, the top layer planes are duplicated on the bottom layer so that there can be no overlapping of input and output planes. This method can be used for boards of greater layer count.
Post Solder Cleaning
Picor lidded QP SIPs are not hermetically sealed and must not be exposed to liquid, including but not limited to cleaning solvents, aqueous washing solutions or pressurized sprays. When soldering, it is recommended that no-clean flux solder be used, as this will insure that potentially corrosive mobile ions will not remain on, around, or under the module following the soldering process. For applications requiring water wash compatibility the "-01" open frame version should be used.
Vicor's comprehensive line of power solutions includes high-density AC-DC & DC-DC modules and accessory components, fully configurable AC-DC & DC-DC power supplies, and complete custom power systems.
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. No license is granted by implication or otherwise under any patent or patent rights of Vicor. Vicor components are not designed to be used in applications, such as life support systems, wherein a failure or malfunction could result in injury or death. All sales are subject to Vicor's Terms and Conditions of Sale, which are available upon request.
Specifications are subject to change without notice.
Vicor Corporation 25 Frontage Road, Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715
Picor Corporation * www.picorpower.com * QPI-12 Data Sheet
Email Sales Support: vicorexp@vicorpower.com Technical Support: apps@vicorpower.com
Rev. 1.8 10/08

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