公开(公告)号：US10327295B2

公开(公告)日：2019-06-18

申请号：US16061338

申请日：2016-12-12

Applicant: OSRAM SYLVANIA Inc.

Inventor： Andrew Johnsen ,  Keng Chen ,  Ming Li ,  Peng Xiao

IPC: H05B37/00 ,  H05B33/08

Abstract: A multi string controller with independent current setting for each string is designed for solid state lighting applications. This controller can regulate multiple channels of LEDs. Each string may have a different forward voltage and current setting. A constant buck regulator is also integrated inside this controller to regulate the total current, which is fed into the LED output channels. The circuit also contains a feedback loop in order to precisely control the current passing through each string and is immune to transient conditions.

公开(公告)号：US20190045595A1

公开(公告)日：2019-02-07

申请号：US16061338

申请日：2016-12-12

Applicant: OSRAM SYLVANIA INC.

Inventor： Andrew Johnsen ,  Keng Chen ,  Ming Li ,  Peng Xiao

IPC: H05B33/08

Abstract: A multi string controller with independent current setting for each string is designed for solid state lighting applications. This controller can regulate multiple channels of LEDs. Each string may have a different forward voltage and current setting. A constant buck regulator is also integrated inside this controller to regulate the total current, which is fed into the LED output channels. The circuit also contains a feedback loop in order to precisely control the current passing through each string and is immune to transient conditions.