Switch battery charger with reduced electromagnetic emission

Details Switch battery charger with reduced electromagnetic emission Switch battery charger with reduced electromagnetic emission

1993-03-01

1994-03-08

Kozma, Thomas J.

Inductor devices

With mounting or supporting means

296021, 320 21, 336192, 336198, 336223, H01F 1502, H01F 2730

Patent

active

052931455

ABSTRACT:
A method and apparatus for reducing electromagnetic emissions from switching-type battery chargers safely and at low cost. The method and apparatus generally consists of enclosing the battery charger in a conductive metal case, electrically and physically isolating the low voltage, high current output components from the remainder of the circuitry, reducing the loop area of the output circuit, use of ferrite beads on various conductors, use of an output common-mode inductor wound within a ferrite core, use of inductors and transformers having foil windings, and use of a fusible resistor to protect internal circuitry.

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