Pins And Insulators; Designing The Prototype; General - Coilcraft Planar Transformer Prototyping Kit Manual

9 Turns Auxiliary Board (typical DCR = 250 m )
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Pins and Insulators

The pins are used to interconnect the boards and stamps and to surface mount
the completed transformer to the PCB. An insulator must be used between
each part of the windings assembly and between the windings assembly and
each core half.
The Small Pins (0.038" diameter) are used for pins 1–5 and connect all the
primaries and auxiliary windings. The Large Pins (0.058" diameter) are used
for pins 6–10 and connect all the secondary stamps.
Small pin

Designing the Prototype

General

There are many combinations of boards and stamps that may be used in a
design. The total number of parts that can be used in a windings assembly is
limited by the core size. The cores can accommodate a windings assembly
up to 5 mm high, including top and bottom insulators. Maximum thickness of
each part is as follows: Primary boards: 0.64 mm; Auxiliary boards: 0.32 mm;
Stamps: 0.46 mm, Insulators: 0.05 mm. Some of the combinations of parts
that fit in the core are:
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
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8
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6
Layer 1
Large pin
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4
3
2
1
Layer 2
Document 355 Revised 05/19/08
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Insulator
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