Coilcraft Planar Transformer Prototyping Kit Manual

Designer's kit

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Planar Transformer

Prototyping Kit

Designer's Kit C356

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Summary of Contents for Coilcraft Planar Transformer Prototyping Kit

Page 1 ® Planar Transformer Prototyping Kit Designer’s Kit C356...
Page 2: Table Of Contents
Contents Introduction ....................1 Kit Contents ....................2 Part Details ....................2 Core ......................3 Primary Boards ..................3 Secondary Stamps ................4 Auxiliary Boards ..................5 Pins and Insulators ................7 Designing the Prototype ................7 General ....................7 Prototype Specifics ................
Page 3: Introduction
Each kit contains a sufficient number of parts to build as many as six prototypes. After a transformer design proves successful, the de- sign can be submitted to Coilcraft. A sample transformer is built to be tested in circuit before a production run is started.
Page 4: Kit Contents
Kit Contents The Prototype Planar Transformer Kit contains the following parts: Core ....................... 12 halves Primary Boards ................4 each of 4 types Auxiliary Boards ................. 4 each of 6 types Secondary Stamp 1 ................... 24 Secondary Stamp 2 ................... 12 Insulator Washers .....................
Page 5: Core
2 and 3 or at pins 3 and 4 when both are inverted. Each Primary Board marked with the number of turns on layer 2. 3 Turns Primary Board (equivalent to 24 AWG, typical DCR = 10 m ) Layer 1 Layer 2 Planar Transformer Prototyping Kit Document 355 Revised 05/19/08...
Page 6: Secondary Stamps
4 Turns Primary Board (equivalent to 25 AWG, typical DCR = 18 m ) Layer 1 Layer 2 5 Turns Primary Board (equivalent to 26 AWG, typical DCR = 26 m ) Layer 1 Layer 2 6 Turns Primary Board (equivalent to 27 AWG, typical DCR = 40 m ) Layer 1 Layer 2 Secondary Stamps...
Page 7: Auxiliary Boards
Each Auxiliary Board is marked with the number of turns on layer 2. The Auxiliary Board should be positioned at the top or bottom of the windings assembly. 2 Turns Auxiliary Board (typical DCR = 16 m ) Layer 1 Layer 2 Planar Transformer Prototyping Kit Document 355 Revised 05/19/08...
Page 8 3 Turns Auxiliary Board (typical DCR = 85 m ) Layer 1 Layer 2 4 Turns Auxiliary Board (typical DCR = 82 m ) Layer 1 Layer 2 5 Turns Auxiliary Board (typical DCR = 140 m ) Layer 1 Layer 2 7 Turns Auxiliary Board (typical DCR = 165 m ) Layer 1...
Page 9: Pins And Insulators
4 Primary Boards, 1 Auxiliary Board and 2 Stamps 2 Primary Boards, 1 Auxiliary Board and 4 Stamps 1 Primary Board, 1 Auxiliary Board and 6 Stamps Planar Transformer Prototyping Kit Document 355 Revised 05/19/08...
Page 10 Familiarize yourself with each of the parts in the kit and determine the correct combination of parts needed to build your prototype. Before beginning the as- sembly take note of the pin connections for each layer of all the boards you plan to use.
Page 11: Prototype Specifics
• To minimize leakage inductance, make sure that the boards, stamps and insulators are sandwiched tightly together. The tighter all the parts are to each other, the lower the leakage inductance. Planar Transformer Prototyping Kit Document 355 Revised 08/26/08...
Page 12: Sample Transformer
• Interleave parts as much as possible. Plan the placement of parts so that Primary Boards are separated by Stamps. In the sample transformer, each Primary Board is placed between two Stamps. The more interleaving that can be accomplished, the lower the leakage inductance. The following precautions must be observed when building a prototype.
Page 13: Assembly Procedure
6. Ensure the pins are positioned so they are flush with the bottom of the core and solder them to Stamp 1. 7. Place an insulator over the stamp. Planar Transformer Prototyping Kit Document 355 Revised 05/19/08...
Page 14 8. Position a 6 Turns Primary Board so that Layer 1 faces up. Align terminals 7 and 8 with the pins inserted into Stamp 1. Slide the board down over the pins onto the insulator. 9. Working from the bottom, insert three Small Pins (pins 2 ,3 and 4) and one Large Pin (pin 9) into the board.
Page 15 Small pins Insulator Stamp 1 (one half of first turn) Insulator Core half Large pins Orientation of first Stamp 1 and bottom Core half Figure 5. Exploded view of the Sample Transformer Planar Transformer Prototyping Kit Document 355 Revised 05/19/08...
Page 16 Coilcraft, Inc. www.coilcraft.com Worldwide Headquarters 1102 Silver Lake Road Cary IL 60013 USA +1-847-639-6400 Fax +1-847-639-1469 info@coilcraft.com European Headquarters 21 Napier Place, Wardpark North Cumbernauld, Scotland G68 0LL +44-1236-730595 Fax +44-1236-730627 sales@coilcraft-europe.com...

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C356