公开(公告)号：US11246202B2

公开(公告)日：2022-02-08

申请号：US16500674

申请日：2018-04-05

申请人： SIGNIFY HOLDING B.V.

发明人： Theo Gerrit Zijlman ,  Bertrand Johan Edward Hontele ,  Marinus Joseph Maria Kahlman ,  Min Yang

IPC分类号： H05B45/44 ,  H05B45/10

摘要： An LED lighting driver has a switched mode power supply which generates an auxiliary power supply. The auxiliary power supply circuit has a first power supply inductor and a second power supply inductor in series with each other. The second power supply inductor is selectively switched into or out of the auxiliary power supply circuit, thereby varying a transformer ratio to the main energy storage inductor. The switching may be made based on a light output mode or a standby mode being in operation. The standby mode then enables more efficient generation of an auxiliary supply voltage.