Globalfoundries Inc.

Sumon K Bose

Hrishikesh Bhagwat

Rajesh Swaminathan

Ramesh G Karpur

Somnath Samantha

Krishnadas Bhagwat

Abhisek Khare

The present invention discloses system and method to regulate primary side current using an event driven architecture in LED circuit. The system () 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 () effectively combines input wave shaping (Active PFC), dimming and PSR to achieve accurate secondary side currents. The method () 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.

System and method to regulate primary side current using an event driven architecture in LED circuit

The present invention discloses a system and method for active power factor correction and current regulation in led circuit. The system () 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 waveshaping 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 () is versatile enough to improve PF and current accuracy in LED circuits and indimmers circuits.

System and method for active power factor correction and current regulation in LED circuit

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Bengaluru, India

Sumon K Bose