The design of constant current source of high-power Semiconductor laser diode based on ADuC812

Author

Xianming Xiong ; Ying Huang ; Fangrong Hu

Author_Institution

Guilin Univ. of Electron. Technol., Guilin

fYear

2007

fDate

11-13 July 2007

Firstpage

574

Lastpage

577

Abstract

A design of digital-controlled constant current source for a high-power semiconductor laser diode based on ADuC812 is described. The constant current source used a high-power MOSFET as the current control device and a Hall current sensor as the feedback device of the sample current. The over-current protection circuit and median filter arithmetic in software are designed to ensure stability and safety of laser diode operation. The practical application indicates that the constant current source is safe and reliable to the laser diode, with the linear control of the output current ranged from 0 to 50 Ampere and the 0.1- ampere precision.

Keywords

Hall effect transducers; digital control; electric current control; overcurrent protection; power MOSFET; power semiconductor diodes; semiconductor lasers; ADuC812; Hall current sensor; current control device; digital-controlled constant current source; high-power MOSFET; high-power semiconductor laser diode; median filter; over-current protection circuit; Laser applications; Logic gates; Safety; Semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on

Conference_Location

Kokura

Print_ISBN

978-1-4244-1473-4

Type

conf

DOI

10.1109/ICCCAS.2007.6251625

Filename

6251625