Core; Primary Boards - Coilcraft Planar Transformer Prototyping Kit Manual

Core

This kit contains 12 core halves. Two pieces are needed for each prototype.
The cores are not gapped. Specifications are as follows:
Effective area (A
Effective magnetic path length (I
Effective volume (V
A value for core set = 2500 nH/turns
L
Relative permeability = 1500 nom
Weight: 5.2 g per set (2 halves)

Primary Boards

The four different Primary Boards can be combined in series (for more turns)
or in parallel (for lower DCR). The kit includes Primary Boards with 3 turns,
4 turns, 5 turns and 6 turns. The following primary turns are possible:
3 Turns
4 Turns
5 Turns
6 Turns
6 Turns (3 Turns + 3 Turns)
8 Turns (4 Turns + 4 Turns)
9 Turns (5 Turns + 4 Turns)
10 Turns (5 Turns + 5 Turns)
11 Turns (6 Turns + 5 Turns)
12 Turns (6 Turns + 6 Turns)
Using two 6 Turn Primary Boards in parallel results in half the DCR of using
one 6 Turn Primary Board.
When using two Primary Boards in series, one board is inverted and the boards
are connected together only at pin 3. Boards used in parallel are oriented the
same way (the layers of each board face the same direction) and are con-
nected together at pins 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 )
1
2
3
4
5
Planar Transformer Prototyping Kit
2
) = 0.473 cm ; Minimum area (A
e
3
) = 1.25 cm
e
Layer 1
) = 2.64 cm
e
2
10
5
9
4
3
8
2
7
1
6
Document 355 Revised 05/19/08
2
) = 0.410 cm
min
Layer 2
6
7
8
9
10
3