Temperature Rise Effects on Dynamic Resistances for Laser Diodes With a Wavelength of 450 nm for Vehicle Headlight Applications

In this paper, a laser headlight power converter (LHPC) was developed to drive the InGaN-based blue beam laser diode (BBLD). The LHPC was composed of the four-switch step-up step-down converter (FSSUSDC), the FSSUSDC controller, and the current error compensator (CEC). When the BBLD dynamic resistan...

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Bibliographic Details
Published inIEEE transactions on vehicular technology Vol. 68; no. 10; pp. 9529 - 9542
Main Author Pai, Kai-Jun
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Air temperature
Design analysis
Diodes
dynamic resistance
Error compensation
Estimation
Headlights
Ignition
Inductors
InGaN
Laser beams
laser diode
Laser headlight
Lasers
optical output power
Power converters
Proportional integral
Resistance
Semiconductor lasers
Semiconductor materials
Spikes
Temperature
Vehicle dynamics
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Summary:In this paper, a laser headlight power converter (LHPC) was developed to drive the InGaN-based blue beam laser diode (BBLD). The LHPC was composed of the four-switch step-up step-down converter (FSSUSDC), the FSSUSDC controller, and the current error compensator (CEC). When the BBLD dynamic resistance was increased under the high ambient air temperature, the FSSUSDC operated in the step-down mode, and the CEC employed the proportional-integral control, the BBLD driving current exhibited an ignition current spike, which could destroy the semiconductor material of the BBLD, resulting in optical output power decay. Therefore, a new four-gradation gain (FGG) control method was proposed to mitigate the ignition current spike of the BBLD. This paper presented the BBLD temperature characteristic, an analysis of the LHPC ignition current, a CEC compensation design, and an analysis and design of the FGG control.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2019.2929225