公开(公告)号：US20180324936A1

公开(公告)日：2018-11-08

申请号：US15763809

申请日：2016-09-27

Applicant: OSRAM SYLVANIA INC.

Inventor： Eliseo Carcamo OLMOS ,  Luis Manuel Leon LARA

IPC: H05B41/282 ,  H05B37/03 ,  H05B33/08

CPC classification number: H05B41/2827 ,  H05B33/089 ,  H05B37/036 ,  H05B37/038 ,  Y02B20/348

Abstract: Programmable drivers (or power supplies) for solid state light sources are disclosed, on which output regulation is improved to expand the dimming range to 1% and reduce and/or remove flicker. Additional fault conditions are set up to avoid latching, and thus provide for a controllable restart feature. Such drivers include an isolated half bridge resonant converter with an improved control approach designed to regulate very low current though primary side in a feed-forward loop. Such drivers include both digital and analog loops that improve the performance in steady state and/or during transients, particularly for a lighting load, in comparison to a single full digital control.