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Design and analysis of automotive high intensity discharge lamp ballast using micro controller unit

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2 Author(s)
Kyu-Chan Lee ; Interpower Co. Ltd., Seoul, South Korea ; Bo Hyung Cho

A new scheme of the automotive high intensity discharge (HID) lamp ballast systems is proposed. The proposed scheme is consisted of the high frequency DC-DC converter and the low frequency DC-AC inverter as same as conventional HID ballast system. However this system separates the input voltage of the ignitor from DC link voltage using auxiliary winding, which results in the use of the lower voltage rating power devices for HID lamp ballast system compared with conventional system. As a result, proposed system has a lower cost or a higher efficiency. For the improvement of the efficiency, the proposed ballast controller using micro-controller unit (MCU), controls the frequency to operate the DC-DC converter in critical conduction mode. This paper presents the design and analysis of the proposed ballast and some experimental results.

Published in:

Power Electronics, IEEE Transactions on  (Volume:18 ,  Issue: 6 )