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Title: Switched-capacitor isolated LED driver

Abstract

A switched-capacitor voltage converter which is particularly well-suited for receiving a line voltage from which to drive current through a series of light emitting diodes (LEDs). Input voltage is rectified in a multi-level rectifier network having switched capacitors in an ascending-bank configuration for passing voltages in uniform steps between zero volts up to full received voltage V.sub.DC. A regulator section, operating on V.sub.DC, comprises switched-capacitor stages of H-bridge switching and flying capacitors. A current controlled oscillator drives the states of the switched-capacitor stages and changes its frequency to maintain a constant current to the load. Embodiments are described for isolating the load from the mains, utilizing an LC tank circuit or a multi-primary-winding transformer.

Inventors:
;
Issue Date:
Research Org.:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1243303
Patent Number(s):
9,295,116
Application Number:
14/293,107
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA (Oakland, CA)
DOE Contract Number:  
AR0000114
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Jun 02
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Sanders, Seth R., and Kline, Mitchell. Switched-capacitor isolated LED driver. United States: N. p., 2016. Web.
Sanders, Seth R., & Kline, Mitchell. Switched-capacitor isolated LED driver. United States.
Sanders, Seth R., and Kline, Mitchell. Tue . "Switched-capacitor isolated LED driver". United States. https://www.osti.gov/servlets/purl/1243303.
@article{osti_1243303,
title = {Switched-capacitor isolated LED driver},
author = {Sanders, Seth R. and Kline, Mitchell},
abstractNote = {A switched-capacitor voltage converter which is particularly well-suited for receiving a line voltage from which to drive current through a series of light emitting diodes (LEDs). Input voltage is rectified in a multi-level rectifier network having switched capacitors in an ascending-bank configuration for passing voltages in uniform steps between zero volts up to full received voltage V.sub.DC. A regulator section, operating on V.sub.DC, comprises switched-capacitor stages of H-bridge switching and flying capacitors. A current controlled oscillator drives the states of the switched-capacitor stages and changes its frequency to maintain a constant current to the load. Embodiments are described for isolating the load from the mains, utilizing an LC tank circuit or a multi-primary-winding transformer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {3}
}

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