Patent · US Active

Multi string controller with independent current setting for each string

US10327295B2 · kind B2 · utility

0Cited by

0References

16Claims

0Family size

Assignee

OSRAM SYLVANIA Inc. · US

Inventors

Andrew Johnsen · Danvers, US
Keng Chen · North Andover, US
Ming Li · 暖泉村, CN
Peng Xiao · Andover, US

Key dates

Filing date	Dec 12, 2016
Grant date	Jun 18, 2019
Priority date	—
Expiry date	Dec 12, 2036

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/30
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.