| 摘要 |
A solar cell system with a digital peak power tracker and a controlling method thereof are provided to increase a power conversion efficiency to be higher than 80% by accurately tracking a maximum power point using the digital peak power tracker. A solar cell system includes a solar cell plate(10), a measuring unit(20), a DC/DC converter(30), a PWM(Pulse Width Modulation) controller(44), and a microcomputer(41). The measuring unit measures a voltage and a current which are outputted from the solar cell plate. The DC/DC converter converts the power from the solar cell plate, supplies the converted power to a load, and adjusts an operation point of the solar cell. The PWM controller modulates a pulsewidth of the DC/DC converter. The microcomputer applies a control signal to the PWM controller, so that the PWM ratio is adjusted according to a power variation based on the current and voltage values from the measuring unit.
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