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Title: Switched-capacitor isolated LED driver

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