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Appl. Sci. 2018, 8(9), 1532; https://doi.org/10.3390/app8091532

Start-Up Current Spike Mitigation of High-Power Laser Diode Driving Controller for Vehicle Headlamp Applications

1
Department of Electrical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
2
Department of Electrical Engineering, Tungnan University, New Taipei City 22202, Taiwan
3
Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 10607, Taiwan
4
Department of Power Mechanical Engineering, National Formosa University, Huwei Town, Yunlin County 63201, Taiwan
*
Author to whom correspondence should be addressed.
Received: 26 July 2018 / Revised: 18 August 2018 / Accepted: 29 August 2018 / Published: 1 September 2018
(This article belongs to the Section Computer Science and Electrical Engineering)
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Abstract

A high-power laser diode driving controller (HPLDDC), which incorporates the power converter with the feedback controller, was developed and implemented in this paper. The synchronous buck–boost converter (SBBC) was the topology of the power converter; the SBBC could be operated in step-up or step-down mode in accordance with variable on-board battery voltage inputs into the HPLDDC. Moreover, the feedback controllers were equipped with a current-loop controller (CLC) and a voltage-loop controller (VLC); the VLC was employed to regulate the SBBC output voltage to drive and start-up the high-power laser diode (HPLD). The CLC was used to regulate the SBBC output current to supply a constant-current driving the HPLDs. During the start-up transient phase, when the SBBC output mode is changed from the constant-voltage to the constant-current, a start-up current spike occurs that can destroy the semiconductor material of the laser diode. However, few studies have discussed methods of coping with this problem. Therefore, this study proposed a proportional-integral associating proportional (PIAP) control technology, which can be applied to the CLC for the start-up current spike mitigation. Complete designs and analyses are presented in this paper. Simulations and experiments validate that the PIAP control method is effectual to solve the start-up current spike. View Full-Text
Keywords: high-power laser diode; synchronous buck–boost converter; proportional-integral associating proportional high-power laser diode; synchronous buck–boost converter; proportional-integral associating proportional
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Pai, K.-J.; Qin, L.-D.; Lin, C.-H.; Tang, S.-Y. Start-Up Current Spike Mitigation of High-Power Laser Diode Driving Controller for Vehicle Headlamp Applications. Appl. Sci. 2018, 8, 1532.

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