COMMON-MODE CHOKES

APPLICATION FEATURES

The JL and ML Series of chokes are offered for use in AC or DC power line to attenuate common mode noise.

The magnetic circuit is designed and windings are connected in the power line so that the currents will cancel.  However, the common mode noise will be attenuated.

A High-permeability ungapped ferrite core is used.

Packaging Considerations

A two-section printed circuit bobbin is used which automatically isolates the two windings.  This provides a high dielectric withstanding voltage value.

The JL series are encapsulated in a cup which results in high density packaging and low profile.

The ML series uses a printed circuit bobbin which provides a reliable and inexpensive termination.  All the pins are left on the bobbin which results in maximum holding strength to the board.

PERFORMANCE COMPARISONS

Where the volt-ampere product provides power handling capability of transformers, LI² specifies choke power handling capability.  The LI² (mH AMPS²) of the three re:  OG18ML = 8.5, OG25ML = 21, and EM18JL = 32.

Furthermore, the DCR of the 160 mH parts for the three series are 9.3, 5, and 2.5 ohms respectively.

To summarize, the EM18JL series has the highest performance and best packaging density while the OGML series has the lowest price.  This is especially true when compared t the sector wound toroids.

Contact MCE for questions or modified standard parts.

Rev 1005B

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