QPI-12 (R) QUIETPOWER (R) 7 A V*I Chip EMI Filter Description Features 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. * > 40 dB CM attenuation at 1 MHz 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. * 12.4 x 25 x 4.5 mm SiP (System-in-Package) * > 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 * 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 Cbus Bus- Shield Vi+ Bus+ Out+ QPI-12 Bus- Out- Cin Vo+ Vi+ PRM Vi- Vo+ VTM Vi- Vo- Load Bus+ Vo- 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 Picor Corporation * www.picorpower.com Figure 3 - QPI-12 network analyzer attenuation curves QPI-12 Data Sheet Rev. 1.6 Page 1 of 4 Absolute Maximum Ratings - Exceeding these parameters may result in permanent damage to the product. Pins Parameter Notes Min Max Units Bus+ to Bus- Input voltage Continuous Bus+ to Bus- Input voltage 100 ms transient -80 80 Vdc -100 100 Vdc -1500 1500 Vdc 7 Adc BUS+ / BUS- to shield plane BUS inputs to shield hipot QPI+ to QPI- Input to output current Package Power dissipation @ 25C 1.50 W Package Operating temperature PCB to filter interface 100 C Package Thermal resistance Free air 75 C/W Package Thermal resistance PCB Layout Fig. 7 30 C/W Package Storage temperature Package Reflow temperature 20 s exposure All Pins ESD HBM Continuous @ 25C -55 (1) -2 125 C 212 C +2 kV Note 1: RoHS compliant product maximum peak temperature is 245C for 20 seconds. Electrical Characteristics - Parameter limits apply over the operating PCB temperature range unless otherwise noted Parameter Notes Bus+ to Bus- input range Measured at 7 A Min Typ Max Units 76 Vdc (2) 110 mVdc (2) 110 mVdc Bus+ to Out+ voltage drop Measured at 7 A Bus- to Out- voltage drop Measured at 7 A Common mode attenuation VBUS = 48 V Frequency = 1.0 MHz 40 dB Differential mode attenuation VBUS = 48 V Frequency = 1.0 MHz 60 dB Input bias current at 80 V Input current from Bus+ to Bus- 10 A Note 2: See Figure 6 for current derating curve. SiP Package Outline Pad Description Pin Number Name Description 8, 9 1, 10 6, 7 4, 5 Bus + Bus - Out + Out - 2, 3 Shield Positive bus potential Negative bus potential Positive input to the converter Negative input to the converter Shield connects to system chassis or safety ground. Ordering Information Part Number Description QPI-12L QPI-12 Land Grid Array Package QPI-12LZ QPI-12 Land Grid Array Package, RoHS compliant Picor Corporation * www.picorpower.com QPI-12 Data Sheet Rev. 1.6 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. 1.6 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's Z version 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. 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 Vicor Express: vicorexp@vicr.com Technical Support: apps@vicr.com Rev. 1.6 2/08