本文目的在於增加行動電子產品電力使用壽命，並可減少市電充電。文中採用微處理器(S3C2416)搭配太陽能電池與市電充電器的共存系統，並可直接對鋰電池充電。太陽能電池在不同日照量，將產生不同的輸出功率，故本文特別針對照度迴授裝置作為太陽能發電最大功率追蹤控制，以達到最佳能源使用。本文利用微處理器及光感偵測器讀取環境照度的強度，依日照量產生出相對應之功率以及輸出脈波寬度調變責任週期至降壓型轉換器進而達成太陽能發電最大功率追蹤控制。本系統的規格照度範圍在10 klux至100 klux、太陽能電池輸出電壓範圍在7.1V至9.7V、輸出電流範圍在0.05A至0.55A之間、最大輸出功率4W。本文已完成了系統整合充電電源管理積體電路，可控制鋰電池充電電流、充電指示燈狀態、充電保護設計以及鋰電池電壓偵測等主要功能去達成鋰電池充電保護的完整性，以及市電充電與太陽能電池發電最大功率追蹤控制方法，及實測結果。

The purpose of this thesis in the increase electricity service life of mobile electronic products and reduce the adapter charging opportunities. The thesis uses a microprocessor (S3C2416) with a solar cell and adapter charger coexistence system and directs the lithium battery charging. Solar cells because of the different amount of sunlight to produce different output power, so this thesis is especially for the illumination device as the maximum power point tracking control feedback purposes. Microprocessor which connect light sensor by the microprocessor to detect the amount of sunlight strength of the current environment, and control the pulse width modulation duty cycle output buck converter, and depending on the amount of sunlight out corresponding to the power and the duty cycle then to establish a table. The thesis detects environment sunlight strength 10 klux to 100 k lux, solar cell output voltage range between 7.1V to 9.7V, the output current range from 0.05A to 0.55A. Maximum output power is 4W. This thesis has been completed design as well as the main function of the lithium battery voltage detection, system integrated charging power management integrated circuit to control the lithium battery charge current, charge indicator status, charging protection to protect the integrity of rechargeable lithium battery and mains reached charging with solarbattery maximum power point tracking method.

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