US Patent 7583519 Switch mode power supply systems
Patent 7583519 was granted and assigned to Cambridge Semiconductor Limited on September, 2009 by the United States Patent and Trademark Office.
All edits
This invention relates to methods and apparatus for sensing the output current in a switch mode power supply (SMPS) using primary side sensing. We describe a module which senses a current in a primary winding of a transformer and a voltage on a primary or auxiliary winding of the transformer, and which includes a multiplier coupled to an output of a signal averager averaging a primary winding current and to an output of a timing signal generator using the sensed voltage to signal when a secondary winding is powering an output of the SMPS, to multiply an averaged current sense signal by a fraction of a total cycle period of said SMPS during which the secondary winding is providing power to provide a signal estimating an output current of the SMPS.
US Patent 07583519 Switch mode power supply systems US Patent 7583519 Switch mode power supply systems
US Patent 07583519 Switch mode power supply systems
Find more entities like US Patent 7583519 Switch mode power supply systems
