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}
}