Invention Grant
- Patent Title: Electrolytic capacitorless, selectively dimmable LED driver
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Application No.: US17321057Application Date: 2021-05-14
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Publication No.: US11310883B2Publication Date: 2022-04-19
- Inventor: Pritam Das
- Applicant: The Research Foundation for The State University of New York
- Applicant Address: US NY Binghamton
- Assignee: The Research Foundation for The State University of New York
- Current Assignee: The Research Foundation for The State University of New York
- Current Assignee Address: US NY Binghamton
- Agency: Hoffberg & Associates
- Agent Steven M. Hoffberg
- Main IPC: H05B45/10
- IPC: H05B45/10 ; H05B45/382 ; H05B45/38 ; H02M1/08 ; H05B45/355 ; H02M3/335
Abstract:
An apparatus method for driving light emitting diodes (LEDs), comprising: receiving an alternating current input; producing a DC current having a voltage with an AC-DC boost power-factor correction stage, having a variable-frequency operation, and a set of switches controlled in dependence on the voltage to limit a peak LED current; and producing an LED drive current with a DC-DC power conversion stage having a set of switches to selectively pulse-width modulate the LEDs to control a brightness, wherein the set of switches in the AC-DC boost power-factor correction stage and the set of switches in the DC-DC power conversion stage are each controlled to switch at zero current.
Public/Granted literature
- US20210274617A1 ELECTROLYTIC CAPACITORLESS, SELECTIVELY DIMMABLE LED DRIVER Public/Granted day:2021-09-02
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