® QPI-X-EVAL1 QuietPower ™ Evaluation Board for QPI Series Active EMI Filters The QPI-x-EVAL1 [“x” refers to the specific QPI model] is an easy to use evaluation board for testing the QPI family of active EMI filters. The board can be used in different EMI configurations (Figures 1 and 2), with many of the standard DC to DC converters available. Consult the converter’s manufacturer’s recommendation for proper EMI re-circulation. The evaluation board includes a mounted QPI filter, input and output capacitors, and terminals blocks for easy electrical connection. When using the QPI-x-EVAL1 evaluation board, close attention must be paid to wiring and grounding. Wires should be kept as short as possible and positioned to minimize radiated noise pick up around the QPI filter. Refer to Picor’s QPI-AN1 application note for proper EMI measurement set up. Input BUS Filter performance in the application is highly dependent on several factors and cannot be extrapolated from insertion loss curves alone. Final noise performance is a complex function of filter elements, equipment grounding and noise source impedances, which vary in magnitude and phase over the frequency spectrum of interest. Designers should be aware that to select and quantify an EMI filter for conducted noise, they must test the filter in their product under the set up and conditions specified in the applicable EMI standards. Measurements should be made in consultation with in-house compliance testing or an independent EMI test facility. Check www.picorpower.com for data sheets, application notes and additional product information. Converter + CY + C1 QPI - DC/DC C2 - CY SHIELD SHIELD QPI-Active EVAL1 Figure 1 - Typical for “Open-frame” EMI topology Input BUS SHIELD Plane Converter + + C1 - C2 QPI DC/DC CY SHIELD CY CY CY SHIELD QPI-Active EVAL1 Figure 2 - Typical for “Base-plate” EMI topology Picor Corporation • www.picorpower.com QPI-X-EVAL1 Data Sheet Rev. 1.3 Page 1 of 2 Thermal2 IN- OUT+ 9 8 7 BUSBUSBUS- 1 5 Input BUS C2 47uF QPIQPIQPI- SHIELD 2 15 16 1 SHIELD 3 QPI+ QPI+ QPI+ QPI C1 47uF J1 Thermal BUS+ BUS+ BUS+ Thermal 12 13 14 J2 1 4 3 2 OUT- 2 3 Converter 6 IN+ 11 10 Thermal1 SHIELD Figure 3 - QPI-X EVAL1 schematic. Note: C1 and C2 are 47 µF, 100 V Capacitors Figure 4 - QPI-X EVAL board showing location of components and connectors. Ordering Information Part Number Description Part Number Description QPI-3-EVAL1 Evaluation board for QPI-3LZ QPI-5-EVAL1 Evaluation board for QPI-5LZ QPI-4-EVAL1 Evaluation board for QPI-4LZ QPI-6-EVAL1 Evaluation board for QPI-6LZ 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-X-EVAL1 Data Sheet Email Vicor Express: [email protected] Technical Support: [email protected] Rev. 1.3 4/08