The high-lightness LED controller using solar energy basing on PSoC

Aiming at the situation where solar energy is rich in remote mountain areas and in field but inconvenient for wiring and maintaining power grid, this paper put forward the idea of using the HBLED as the illumination light source and taking advantage of solar energy at the same time. Then, the HBLED controller based on PSoC (programmable system-on-chip) technology is introduced in this paper. This controller can extend the life time of HBLED, save the energy in a much more effective way by improving the P&O algorithm to achieve the solar cells MPPT (Maximum Power Point Tracking), and regulate the brightness of HBLED according to the light of circumstance. Finally, the wide used controller which contains the control circuit and HBLED driver circuit is introduced in this paper. In this paper, the design of the control circuit and the HBLED driver circuit and the method of calculating the inductor L of the driver circuit are introduced. This controller has wide applications.