Low-power-consumption solar light-operated boost circuit

Abstract

A low-power-consumption solar light-operated boost circuit comprises a chip internal circuit and a peripheral circuit. The peripheral circuit comprises an inductor L, a solar panel solar, an input inductor L and an output capacitor Cout, and the chip internal circuit comprises a boost circuit, a solar charging control circuit, a battery low electric quantity turn-off circuit, an enabling circuit and a power supply switching circuit; wherein the solar panel solar is connected between a pin SOL and a grounding terminal GND, the input inductor L is connected between a pin BAT and the grounding terminal GND, the input inductor L is connected between the pin BAT and a pin LX, and the output capacitor Cout is connected between a power supply VDD and the grounding terminal GND. Therefore, the output voltage is lowered during enabling control and light-operated charging, so that the power consumption is greatly reduced, and the application range is expanded.

Description

technical field [0001] The invention belongs to the technical field of lighting circuits, and relates to a low power consumption solar light control boosting circuit. Background technique [0002] Under the current environment of advocating green life, outdoor lighting applications such as parks, squares, and outdoor advertising lights have generally adopted solar energy supplementary energy and control methods, which can not only make full use of current sustainable energy, but also greatly save traditional energy consumption. , Reduced pollution emissions. Since lawn lights, light strings and other LEDs often need power supply greater than their conduction voltage in practical applications, it is required to provide a boost function when using solar cells for power supply. [0003] The circuit forms of LED controllers with boost function widely used in the market mainly include: constant current control circuit, constant voltage control circuit, PWM (pulse width modulatio...

AI Technical Summary

Problems solved by technology

[0005] Especially, in the application of solar light-controlled booster, when two solar dry batteries or lithium batteries connected in series are used, the output voltage after solar charging is the same as the input voltage, while the LED conduction voltage is lower than the voltage of two dry batteries and lithium batteries. This will cause the LED to light up when the solar energy is charging. This theme not only does not conform to customer habits, but also wastes resources. Therefore, products such as lawn lights and solar light strings on the market often encounter limited applications. Circuit case for solar charge boost applications with only one cell

[0006] In addition, the traditional solar light-controlled boost circuit is often composed of a boost chip, solar charging control and other circuits, which makes the customer increase the PCB board area and the number of peripheral tubes in the actual application process, greatly increasing the actual cost

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