本文提出一車用氙燈雙燈管電子式安定器之架構，其前級為雙組返馳式轉換器，提供點燈暫態至穩態之燈管功率，並於穩態時採用定功率控制；後級燈管驅動採用共臂雙燈管換流器，以低頻方波驅動雙燈管可避免產生音頻共振現象，燈管操作於負壓以延長燈管壽命。安定器採用微處理器為系統控制核心，控制燈管點燈時序與燈管穩態之定功率。最後本文實作一35W D1型車用氙燈雙燈管電子式安定器，驗證電路之可行性，並探討燈管暫態與穩態工作之特性。

This thesis presents a novel electronic ballast to drive dual Xenon headlight lamps. Two flyback converters are used to provide the lamp power from the warm-up period to the steady state. A common-leg bridge inverter is used to drive the two lamps with a low- frequency square-wave to eliminate the acoustic resonance from operation. The lamps are driven with negative lamp voltage to increase lamp life. Also, the electronic ballast is controlled by a micro control unit (MCU). The start-up sequences and constant lamp power control of the lamps are achieved by the digital signal processor (DSP). The transition state and steady state of a lamp are described in this thesis. Finally, a laboratory prototype of a 35W D1 automotive electronic ballast has been implemented to verify its feasibility.

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