Title:
LOAD DRIVE CIRCUIT, LOAD DRIVE METHOD, AND LUMINAIRE
Document Type and Number:
WIPO Patent Application WO/2013/167695
Kind Code:
A3
Abstract:
The present disclosure provides a load drive circuit, a load drive method and a luminaire. The load drive circuit and load drive method are used for reducing a ripple of a load current flowing through at least one load. The circuit comprises: a DC power source configured to provide a DC output voltage for at least one load based on an output voltage of an AC/DC converter, the DC output voltage having a ripple; a variable resistance module that is connected to the load; a ripple reduction module that generates, based on a reference voltage and a feedback signal from the load, a variable resistance adjusting signal for adjusting the resistance of the variable resistance module so as to reduce a ripple of the load current, wherein the reference voltage is generated based on the DC output voltage; and a reference voltage adjusting module that adjusts the average value of the reference voltage based on the variable resistance adjusting signal, so as to make the average value of the reference voltage approach the average value of the feedback signal as much as possible.
Inventors:
YANG XUSHENG (CN)
CHEN SHAOPING (CN)
HE XIONGQIANG (CN)
ZHANG QINGFU (CN)
CHEN SHAOPING (CN)
HE XIONGQIANG (CN)
ZHANG QINGFU (CN)
Application Number:
PCT/EP2013/059658
Publication Date:
May 15, 2014
Filing Date:
May 08, 2013
Export Citation:
Assignee:
OSRAM GMBH (DE)
International Classes:
H05B44/00
Foreign References:
| US20060220571A1 | 2006-10-05 | |||
| US20090284180A1 | 2009-11-19 | |||
| US20080150877A1 | 2008-06-26 | |||
| EP2149871A2 | 2010-02-03 | |||
| US20090322252A1 | 2009-12-31 |
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