公开(公告)号：US10349482B2

公开(公告)日：2019-07-09

申请号：US15531460

申请日：2015-11-29

Applicant: GLOBALFOUNDRIES INC.

Inventor： Abhisek Khare ,  Somnath Samantha ,  Krishnadas Bhagwat ,  Sumon K Bose ,  Hrishikesh Bhagwat ,  Rajesh Swaminathan ,  Ramesh G Karpur

IPC: H05B37/02 ,  H05B33/08

Abstract: The present invention discloses system and method to regulate primary side current using an event driven architecture in LED circuit. The system (100) performs a primary side regulation (PSR) of isolated or non-isolated LED driver topology such as fly back system. The primary side peak voltage or current is regulated to achieve desired secondary side currents without the need of additional external components. The architecture combines firmware and hardware to realize PSR. The method (200) effectively combines input wave shaping (Active PFC), dimming and PSR to achieve accurate secondary side currents. The method (200) corrects the Peak Regulation Voltage or current (PRV) of primary loop to meet desired half cycle reference voltage or current, which in turn achieves the desired secondary loop current in LED circuit.

公开(公告)号：US10440789B2

公开(公告)日：2019-10-08

申请号：US15024607

申请日：2014-06-13

Applicant: GLOBALFOUNDRIES INC.

Inventor： Hrishikesh Bhagwat ,  Krishnadas Bhagwat ,  Rajesh Swaminathan ,  Somnath Samantha ,  Abhisek Khare

IPC: H05B33/08

Abstract: An event based integrated driver system for an end-use power based application is disclosed. The driver system includes an analog module for operating analog input and analog output, a digital module for operating digital input and digital output, a software module for operating software input and software output, an event based module to receive the analog output, digital output or software output, and configured to generate one or more events corresponding to the analog output, digital output and software output respectively, a firmware module configured to generate a response for the one or more events and transmit the response via the event based module to operate at least one of the analog module, digital module, or software module, where the firmware module comprises instructions for operating the analog module, the digital module and the software module based on the end-use power based application.

公开(公告)号：US10178718B2

公开(公告)日：2019-01-08

申请号：US15531458

申请日：2015-11-29

Applicant: GLOBALFOUNDRIES INC.

Inventor： Rajesh Swaminathan ,  Abhisek Khare ,  Hrishikesh Bhagwat ,  Sumon K Bose ,  Krishnadas Bhagwat ,  Somnath Samantha ,  Ramesh G Karpur

IPC: G05F1/00 ,  H05B41/16 ,  H05B33/08 ,  G05F1/70 ,  H05B37/02 ,  H05B37/03

Abstract: The present invention discloses a system and method for active power factor correction and current regulation in led circuit. The system (100) used in the LED driver circuit performs active PFC and current regulation through the dynamic input current wave shaping by limiting peak currents. The dynamic wave 5 shaping scheme is realized through hardware and firmware and is used to strike an optimal balance between current accuracy, Power factor, THD and peak inductor currents. The system (100) is versatile enough to improve PF and current accuracy in LED circuits and indimmers circuits.