HOW TO USE MULTIPLE WINDINGS

L

2

= 10 µH x 2

2

= 40 µH

Where:

L

P = Number of windings in parallel (use 1 with all windings in series)

S = Number of windings in series

I

I

MAX

= I

= 1 Amp x 1

= 1 Amp

L

2

= 10 µH x 1

2

= 10 µH

I

MAX

= I

= 1 Amp x 2

= 2 Amps

10

µH

1 Amp

10

µH

1 Amp

10

µH

1 Amp

Series Connected (2 Windings)

Parallel Connected (2 Windings)

10

µH

1 Amp

Discrete inductors combine like resistors, when connected in series or parallel. For example, inductors in series add and

inductors in parallel reduce in a way similar to Ohm’s Law.

Windings on the same magnetic core behave differently. Two windings in series result in four times the inductance of a

single winding. This is because the inductance varies proportionately to the square of the turns.

Paralleled

VERSA-PAC windings result in no change to the net inductance because the total number of turns remains

unchanged; only the effective wire size becomes larger. Two parallel windings result in approximately twice the current

carrying capability of a single winding. The net inductance of a given

PCM configuration is based on the number of

PCM configuration

of simple two-winding devices are shown below:

L

L

®

Inductors and Transformers

(Surface Mount)