| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 101 === 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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