Patent · US Active

LED driver with comprehensive fault protections

US9999110B2 · kind B2 · utility

2Cited by

2References

16Claims

0Family size

Assignee

DIALOG SEMICONDUCTOR INC. · DE

Inventors

Enzhu Liang · Pacifica, US
Yuwen Wang · Beijing, CN
Ming Gu · San Jose, US

Key dates

Filing date	Jun 16, 2014
Grant date	Jun 12, 2018
Priority date	—
Expiry date	May 7, 2035

Classification

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

Abstract

The embodiments disclosed herein describe a set of fault detection circuits for LED circuits in an LED channel. A first fault detection circuit is configured to detect a short fault across one or more LEDs. A second fault detection circuit is configured to detect an open fault across an LED. A third fault detection circuit is configured to detect a short across an LED channel transistor. A fourth fault detection circuit is configured to detect an LED channel sense resistor open fault. A fifth fault detection circuit is configured to detect if the LED channel is being intentionally unused. These fault detect circuits can be implemented in a fault detection integrated circuit coupled to the LED channel.

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