Apple inc. (20240258905). COMMON MODE NOISE CANCELLATION FOR LLC RESONANT CONVERTERS

COMMON MODE NOISE CANCELLATION FOR LLC RESONANT CONVERTERS

Organization Name

apple inc.

Inventor(s)

Chanwit Prasantanakorn of Santa Clara CA US

Bharat K Patel of San Martin CA US

COMMON MODE NOISE CANCELLATION FOR LLC RESONANT CONVERTERS

This abstract first appeared for US patent application 20240258905 titled 'COMMON MODE NOISE CANCELLATION FOR LLC RESONANT CONVERTERS

Original Abstract Submitted

a power converter can include a switching bridge having two input terminals that receive an input voltage and a switch node coupled to a primary winding of a transformer; at least one rectifier device coupled between a secondary winding of the transformer and an output of the power converter; and a common mode noise compensation capacitor. a first terminal of the common mode noise compensation capacitor can be coupled to a connection between the secondary winding of the transformer and the at least one rectifier device, and a second terminal of the common mode noise compensation capacitor can be coupled to one of the two input terminals. the common mode noise compensation capacitor can be coupled to an energized or a grounded input terminal. the common mode noise compensation capacitance can be selected to be equal to the turns ratio of the transformer times the parasitic capacitance of the transformer.