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UG:301 vicorpower.com Applications Engineering: 800 927.9474 Page 1

PI31xx-xx-EVAL1 Cool-Power

ZVS Isolated

DC-DC Converter Evaluation Board

Chris Swartz

Principal Applications Engineer

May 2013

Introduction

The PI31xx-xx-EVAL1 evaluation board allows the user to test the basic operating

principles of the PI31xx series of high density DC-DC power converters and experience

the performance and value of this solution compared to alternate conventional

solutions. Each evaluation board is populated with the components that could be used

in a ﬁnal design. It is not designed or intended to be used in end product applications.

Please read this document prior to the connection of test equipment and refer to the

product datasheet for device speciﬁcations, descriptions and characteristics. Remember

to follow good lab safety practices and use safety glasses at all times.

The PI31xx-xx-EVAL1 is conﬁgured to support one single input and one single output.

Each board oers pin strap options for trimming the output voltage up and down,

turning the converter on and o and adding EMI system “Y” capacitors. Additional

parts are included to compensate for line impedance associated with long leads from

the bench power supply to the converter. Additional component footprints are made

available to allow the user to test dierent design conﬁgurations that may be required

to meet their end needs. Kelvin type test points are included to allow for easy and

convenient connections of testing instruments for evaluation of eciency, line/load

regulation and transient response. A low impedance oscilloscope connection using a

Johnson jack is included for ripple measurement and evaluation of the output voltage

during transient events. Each demo board is equipped with a heatsink to allow high

power operation with a small amount of air ﬂow and to allow operation of the board

over various temperature extremes.

Contents Page

Introduction 1

Product Description 2

Board Connections 2

Thermal Considerations 3

Max I/O Ratings 5

Schematic

BOMs 6

Test Setup 11

PCB Artwork 12

Mechanical Outline 14

Ordering Information 14

USER GUIDE | UG:301

Figure 1.

PI31xx-xx-EVAL1

Evaluation Board

Summary of content (14 pages)

PAGE 1
USER GUIDE | UG:301 PI31xx-xx-EVAL1 Cool-Power® ZVS Isolated DC-DC Converter Evaluation Board Chris Swartz Principal Applications Engineer May 2013 Contents Page Introduction 1 Product Description 2 Board Connections 2 Thermal Considerations 3 Max I/O Ratings Schematic 5 BOMs 6 Test Setup 11 PCB Artwork 12 Mechanical Outline 14 Ordering Information 14 Introduction The PI31xx-xx-EVAL1 evaluation board allows the user to test the basic operating principles of the PI31xx series of high d
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Cool-Power® PI31xx Series Product Description The PI31xx operates over a wide range input, delivering 50 W or 60 W output power depending on the individual model number. The PI31xx Series is available in a space saving surface mountable 0.87” x 0.65” x 0.265” Power –System –in – a – Package (PSiP), achieving ~50% space reduction versus alternative solutions.
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2. Default Pin Strap Configuration a. Ensure the pin straps are in the following default locations before proceeding: n ENABLE = Not Used (enabled) n TRIM_UP = Not Used n TRIM_DN = Not Used n OPT1 = Not Used n OPT2 = Not Used 3. Pin Strap Functions a. ENABLE – adding a strap on this pin will cause the converter to shut down. b. TRIM_UP – Adding a strap in this location will adjust the output voltage up by 10%. c.
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Thermal Considerations The PI31xx-xx-EVAL1 is supplied with optional heat sinks. At present, Picor offers four different heat sink options to accommodate the customers space and cooling needs. Heatsinks are available in two sizes, one with 6.3mm fins and the other with 11mm fins. Each of those heatsinks can be ordered with a specific air flow direction in mind, both cross flow and longitudinal are supported. Please refer to the product website www.vicorpower.com for more information. Table 1.
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Table 3. PI31xx-xx-EVAL1 Evaluation Board Maximum I/O Ratings Name Max Voltage Max Current IN+ 100 V 20 A IN- 100 V 20 A OUT+ 20 V 20 A OUT- 20 V 20 A TRIM_DN 10 V 100 mA OPT1 10 V 100 mA OPT2 10 V 100 mA OUT 10 V 100 mA INP 10 V 100 mA INN 10 V 100 mA ENABLE 10 V 100 mA TRIM/SS 10 V 100 mA SGND 10 V 100 mA TM 10 V 100 mA OUTP 20 V 100 mA OUTN 20 V 100 mA UG:301 vicorpower.com Applications Engineering: 800 927.
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UG:301 vicorpower.com IN– IN+ F1 C20 C21 L1 C1 C2 C3 C4 + C5 TRIM_UP TRIM_DN R1 C6 390 pF ENA ENABLE TRIM/SS 301 K R3 90.9 K C7 DNP INN R2 100 R4 100 K TM OPT1 –IN HS 4.7nF CY3 ENABLE YN 4.7nF CY4 4.7nF 4.7nF PI31xx CY2 TRIM/SS TM SGND +IN YP CY1 YN –OUT +OUT YP OPT2 C8 OUTN OUTP C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 Scope OUT OUT– OUT+ Schematic Diagram HS SGND INP Figure 5. Applications Engineering: 800 927.
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Table 4. PI3101-00-EVAL1 Evaluation Board BOM Table 5. PI3105-00-EVAL1 Evaluation Board BOM Item Qty Ref Design Part # Value U/M Description 1. 1 U1 PI3101-00-HVIZ NA EA 10u F Murata X7R Ceramic Capacitor 10 V or equiv. Picor PI3101-00 High Density PSiP 2. 12 C8-C19 GRM21BR71A106KE5 3. 6 C1-C4, C20C21 GRM31CR72A105KE1 1u F Murata X7R Ceramic Capacitor 100V or equiv. 4. 4 CY1-CY4 GRM31BR73A472K 4700p F Murata X7R Ceramic Capacitor 1kV or equiv.. 5. 1 L1 FP3-4R7-R 4.
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Table 6. PI3106-00-EVAL1 Evaluation Board BOM Table 7. PI3106-01-EVAL1 Evaluation Board BOM Item Qty Ref Design Part # Value U/M Description 1. 1 U1 PI3106-00-HVMZ NA EA 2. 6 C8-C19 GRM21BR71E225KA73L 2.2u F 3. 6 C1-C4, C20C21 GRM31CR71H475KA12K 4.7u F Murata X7R Ceramic Capacitor 50V or equiv. 4. 4 CY1-CY4 GRM31BR73A472K 4700p F Murata X7R Ceramic Capacitor 1kV or equiv.. 5. 1 L1 FP3-R47-R 470n H Coilcraft Inductor 6.
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Table 8. PI3109-00-EVAL1 Evaluation Board BOM Table 9. PI3109-01-EVAL1 Evaluation Board BOM Item Qty Ref Design Part # Value U/M Description 1. 1 U1 PI3109-00-HVMZ NA EA 10u F Murata X7R Ceramic Capacitor 10V or equiv. Picor PI3109-00 High Density PSiP 2. 6 C8-C19 GRM21BR71A106KE5 3. 6 C1-C4, C20C21 GRM31CR71H475KA12K 4.7u F Murata X7R Ceramic Capacitor 50V or equiv. 4. 4 CY1-CY4 GRM31BR73A472K 4700p F Murata X7R Ceramic Capacitor 1kV or equiv.. 5.
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Table 10. PI3110-01-EVAL1 Evaluation Board BOM Table 11. PI3111-00-EVAL1 Evaluation Board BOM Item Qty Ref Design Part # Value U/M Description 1. 1 U1 PI3110-01-HVIZ NA EA 2.2u F Murata X7R Ceramic Capacitor 25V or equiv. Picor PI3110-01 High Density PSiP 2. 6 C8-C19 GRM21BR71E225KA73L 3. 6 C1-C4, C20C21 GRM31CR71H475KA12K 4.7u F Murata X7R Ceramic Capacitor 50V or equiv. 4. 4 CY1-CY4 GRM31BR73A472K 4700p F Murata X7R Ceramic Capacitor 1kV or equiv.. 5.
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Table 12. PI31xx-xx-EVAL1 Packing List Item Qty Part # U/M Description 1. 1 PI31xx-xx-EVAL1 EA Evaluation PCB Assembly 2. 1 32786 EA 6.3mm Heatsink Assembly 3. 1 32784 EA 11mm Heatsink Assembly 4. 1 33855 EA Heatsink Grounding Clip 5. 4 32434 EA Heatsink Pushpins 6. 4 N/A EA Screw, 6-32 7. 4 N/A EA Nut, 6-32 Figure 6. PI31xx-xx-EVAL1 Test Setup OSCILLOSCOPE DC-20MHZ BW DMM + DC AMMETER 0-5A + - + CH1 - CH2 ISOLATED DIFF. AMPLIFIER - + IN + DC ELECT.
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Figure 7. Top Layer Artwork 3 Oz Copper Top Layer Figure 8. Midlayer 1 Artwork 2 Oz Copper Midlayer 1 Figure 9. Midlayer 2 Artwork 2 Oz. Copper Midlayer 2 UG:301 vicorpower.com Applications Engineering: 800 927.
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Figure 10. Midlayer 3 Artwork 2 Oz. Copper Midlayer 3 Figure 11. Midlayer 4 Artwork 2 Oz. Copper Midlayer 4 Figure 12. Bottom Layer Artwork 3 Oz. Copper Bottom Layer UG:301 vicorpower.com Applications Engineering: 800 927.
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Figure 13. Mechanical Drawing 3.100” 2.600” 0.250” 0.250” 0.750” 0.335” High Density Isolated DC-DC Converter IN+ CY1 INP C22 C21 CY2 OUTP C19 C18 C17 C16 C4 C3 C2 C1 C5 OUT+ YP L1 3.100” 0.150” Cool-Power ® Series Evaluation Board F1 OUT 2.430” OPT1 OPT2 TM ENABLE SGND 0.335” C11 C10 C9 C8 INN TRIM/SS IN– ENABLE TRIM_UP TRIM_DN C15 C14 C13 C12 R1 C6 R4 R2 R3 C7 CY3 PI31 OUTN OUT– CY4 1.55” YN - EVAL1 0.150” 0.