LED driver having short circuit protection

Patent metadata

Field	Value
Publication number	US-9504119-B2
Application number	US-201615065273-A
Country	US
Kind code	B2
Filing date	Mar 9, 2016
Priority date	Mar 10, 2015
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

An LED driver having short circuit protection includes a power, a controlling module coupled to the power and be configured to control output thereof, a sampling module electrically connected to the controlling module, a switch controlling module coupled to the sampling module, and a second switch coupled to the switch controlling module 40 and the output end of the power. The controlling module includes a first switch. The sampling module gets a low level signal during that short circuit is occurred in the first switch. When the switch controlling module receives the low level signal, it turns off the second switch so as to reduce the input voltage of the controlling module. The LED driver having short circuit protection can protect the first switch and load during that short circuit is occurred in the first switch.

First claim

What is claimed is:

1. An LED driver having short circuit protection, comprising:
a power;
a controlling module coupled to the power so as to control output current of the LED driver, the controlling module comprising a first switch;
a sampling module coupled to the first switch and configured to sample the output voltage of the first switch, the sampling module outputting low level signal during short circuit
a switch controlling module coupled to the sampling module, and;…

Assignees

• Self Electronics Co Ltd

Inventors

• Zhang Ruomeng
• Pan Huangfeng
• Ma Xuhong
• Ying Junjun

Classifications

• H05B33/0815

  Electricity · mapped topic

• H05B33/0845

  Electricity · mapped topic

• H05B33/0887 Primary

  Electricity · mapped topic

• H05B47/20

  Electricity · mapped topic

• H05B45/375

  Electricity · mapped topic