Globalfoundries Inc.

Cosmic Circuits Private Limited

Xsi Semiconductors Private Ltd.

Hrishikesh Bhagwat

Rajesh Swaminathan

Somnath Samantha

Krishnadas Bhagwat

Abhisek Khare

Prakash Easwaran

Rupak Ghayal

Saumitra Singh

Ramesh G Karpur

Pawan Gupta

Sumon K Bose

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.

Event based integrated driver system and light emitting diode (LED) driver system

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

A dimmer circuit () and a dimming method for an event based integrated driver system for a light emitting diode lighting application is disclosed. Dimmer circuit () includes a front end module for receiving an external dimming input in an analog domain, a digital domain or software domain and for operating a dimming output; an event generator for generating a plurality of events in a prioritized manner to trigger a respective response through front end module; and a firmware module configured for storing instructions for processing the plurality of events in the prioritized manner and for processing each response to implement a functionality in dimming output, where front end module, event generator and firmware module communicate with each other to generate dimming output of the one or more LEDs, and the dimming output has at least one of a linear profile, a non linear profile, a custom profile or combinations thereof.

Light emitting diode (LED) dimmer circuit and dimming method for LEDs

A transient recovery circuit for switching devices. The transient recovery circuit includes a detecting circuit for detecting a rapid transient in an output voltage of a switching device by detecting a rate of the output voltage transient; an auxiliary controlling circuit in a feedback loop of the switching device for correcting the output voltage by changing a bandwidth of the feedback loop if the rapid transient is detected; and an initializing circuit for initializing the feedback loop to expected operating points in a continuous conduction mode after correcting the output voltage.

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Bengaluru, India

Hrishikesh Bhagwat