Texas Instruments Corporation

Garry Trevor Tomlins

David Alexander Grant

Brian Ashley Carpenter

George Young

Andrew Bernard Keogh

Ben A Dowlat

Communications systems and methods for transmitting communications between a charge system and an AC adapter are disclosed. In one embodiment, a communication system comprises an AC adapter disconnect switch that is switchable between coupling and decoupling an AC adapter DC output voltage to the charge system and a charge controller configured to modulate the AC adapter disconnect switch between coupling and decoupling to provide a communication signal to the AC adapter.

Communication systems and methods for transmitting communications between a charge system and an AC adapter

This invention relates to an ACDC converter () comprising a converter input () and a converter output (), a pre-regulation stage () and a DC transformer stage () comprising a transformer input stage () and a transformer output stage (). The transformer input stage comprises a double ended converter and there is further provided a controller () for providing a control signal to the double ended converter. The controller () operates the ACDC converter using burst mode control and by sending control signals comprising pulse sets that are designed to provide substantially zero net magnetising current in the double ended converter. The pre-regulation stage preferably comprises a buck converter which in turn also provides power factor correction to the input of the ACDC converter.

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Glounthaune, Ireland

Garry Trevor Tomlins