Solar Led Lighting Control Chip Research And Design

The energy of the solar photovoltaic generation originates from the inexhaustible solar energy, is the resources richest renewable energy. The solar photovoltaic generation is high and new technology of the energy, and has the unique superiority and the huge development potential. It has the characters as below: bringing little pollution to the air, hardly destroying the ecology,, causing no " greenhouse effect ". Is fully advantageous using the solar energy in maintaining the human and the natural harmony is together. The LED solar illumination, is an important application domain. But high-power LED for general lighting is the subject of the new century, energy conservation, safety, longevity of the comprehensive advantages will trigger the next round of the lighting industry revolution.This paper studies photovoltaic power generation system management control chip design problems. For solar photovoltaic power generation system features, as well as the current applications, the management of most of its controller, and some are using discrete chips consisting of system components. In order to reduce the cost and reduce the complexity of the application, we will control and management system integration and driver control in a single chip, thus realizing the external load on the control and drive and realization of design optimization purposes.the solar photovoltaic generation system's input is not extremely unstable, so the system needs the charging and discharging controller, which must have following several characteristics: 1st. accumulator cell normal charges; 2nd, guards against the counter-charge control; 3rd, guards against the surcharge control; 4th, has guarded against the electric discharge control; 5th, temperature compensation and so on. Only then has above function controller, can safeguard photovoltaic generation system movement to be normal.High-power LED (light emitter diode) is the low voltage unilateral conduction component, the normal work forward voltage drop is 3-4 volt, having to solve the problem which the power source transforms when used in the general lighting. High Voltage LED Driver relief to solve the problem, due to the high voltage is generally driven by ordinary battery power supply, may be used in relatively large power, should have the lowest possible cost. The best electric circuit of converter is the tandem switch dropping-voltage circuit. This paper analyzes the photovoltaic power generation system , the working principle of charge and discharge characteristics and management control of the PWM control mode drive circuit structure. The chip contains major internal functional modules, including BGR circuits, oscillator circuit, sleep control circuit, constant current and constant voltage control circuit, short circuit load detection circuit, soft-start circuit, under-voltage detection circuit. Given all of the transistor-level schematics, all of the functional blocks of Specter after Cadence simulation software simulation, simulation results also be presented.This design topic uses CSMC 0.6μm CMOS high voltage craft, indicated through the simulation, electric circuit normal work, battery charger each target in definition electrical target scope.