®
VERSA-PAC
®
Inductors and Transformers
(Surface Mount)
HOW TO PIN-CONFIGURE VERSA-PAC
®
Each
VERSA-PAC
can be configured in a variety of ways by simply connecting pins together on the Printed Circuit Board
(PCB). As shown below, the connections on the PCB are equal to the pin configuration statement shown at the bottom of the
schematic symbol. Connecting a number of windings in parallel will increase the current carrying capability, while connecting
in series will multiply the inductance. Each
VERSA-PAC
part can be configured in at least 6 combinations for inductor use or
configured in at least 15 turns ratios for transformer applications. Given 25
VERSA-PAC
part numbers, this allows for at least
500 magnetic configurations. The
PCM
configurations can either be created by the designer or simply chosen from the existing
PCM
diagrams. The following inductor example shows 6 windings in series, which result in an inductance of 36 times the base
inductance and 1 times the base current.
INDUCTOR EXAMPLE
FOR SIZES VP3, VP4 AND VP5
L
TOTAL
= 36 x L
BASE
1
12
2
11
3
10
4
9
5
8
6
7
6
7
7
= 36 times the base
Inductance from Data Table.
Component View
1
12
1
PIN CONFIGURATIONS
(2,12)(3,11)(4,10)(5,9)(6,8)
Each VERSA-PAC may be used in at least 15 transformer applications. More than 375 transformer combinations may be
achieved using the available 25 VERSA-PAC parts.
TRANSFORMER EXAMPLE
FOR SIZES VP3, VP4 AND VP5
1:5
1
12
2
11
3
10
4
9
5
8
6
7
12
7
1
1
12
L
PRIMARY
= 1 x L
BASE
2
I
PRI
= 1 x I
BASE
I
SEC
= 1 x I
BASE
PIN CONFIGURATIONS
(3,11)(4,10)(5,9)(6,8)
6
7
The PCM configurations may be selected from the examples on the following pages or created by the designer. Six PCM
inductor and fifteen PCM transformer configurations and equivalent circuit schematics are shown. The printed circuit board
layout in each example illustrates the connections to obtain the desired inductance or turns ratio. The examples may be
used by the PCB designer to configure
VERSA-PAC
as desired.
To assist the designer,
VERSA-PAC
phasing, coupling and thermal issues have been considered in each of the PCM
configurations illustrated. Additionally, the inductance and current ratings, as a function of the respective base values from
the following Data Tables, are shown in each PCM example. Turns ratios are also given for each PCM Transformer shown.
It is important to carefully select the proper
VERSA-PAC
part in order to minimize the component size without exceeding
the RMS current capability or saturating the core. The Data Tables indicate maximum ratings.
COOPER [ COOPER BUSSMANN, INC. ]
