Dimmable LED (light emitting diode) intelligent constant-current and constant-voltage driving power supply

Abstract

The invention discloses a dimmable LED (light emitting diode) intelligent constant-current and constant-voltage driving power supply, which comprises a power supply input unit, a rectifying unit, a power supply output unit, a control circuit, a photosensitive sensor and an infrared sensor, wherein the power supply input unit, the rectifying unit and the power supply output unit are sequentially connected; a constant current circuit and a constant voltage circuit are connected between the rectifying unit and the power supply output unit; the constant current circuit and the constant voltage circuit are respectively connected with a current sampling circuit and a voltage sampling circuit; on one hand, the control circuit is connected with the constant current circuit and the constant voltage circuit, and on the other hand, the control circuit is connected with the current sampling circuit and the voltage sampling circuit; in addition, on one hand, the control circuit is connected with the photosensitive sensor and the infrared sensor, and on the other hand, the control circuit is connected with the power supply output unit. The dimmable LED intelligent constant current constant voltage driving power supply has the advantages that the LED load work is more stable; the illuminating brightness can be regulated in real time; the LED load can be intelligently turned off or turned on; the intelligent control is realized; the electric energy loss is reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a dimmable LED intelligent constant current and constant voltage drive power supply. Background technique [0002] With the intensification of the world's energy crisis, it has become a consensus to reduce energy consumption and protect the environment. LED lighting will replace energy inefficient first and second generation lighting technologies. When in use, high-power LED lighting adopts a method of connecting multiple LED lights in series, and each string of lights is driven separately. Since the characteristics of LED lights require constant voltage and constant current drive, the power supply of LED lights must provide several independent constant voltage and constant current power supplies at the same time, and the design of LED lights is aimed at energy saving, and the constant voltage of the power supply is also required. The constant current has high precision, hi...

AI Technical Summary

Problems solved by technology

Since the characteristics of LED lights require constant voltage and constant current drive, the power supply of LED lights must provide several independent constant voltage and constant current power supplies at the same time, and the design of LED lights is aimed at energy saving, and the constant voltage of the power supply is also required. The constant current has high precision, high efficiency, and long life. However, when the general LED lights leave the factory, the matching between the light strip and the LED driving power supply has been well matched. There is a limit to the number of LED light strips connected to the LED driving power supply, so When many users are using it, as long as the LED can emit light, they can increase the number of LED light strips without limit. When the number reaches a certain number, it is easy to burn the LED drive power supply, causing safety hazards

[0003] In addition, with the continuous development of society, people's requirements for home lighting are becoming more and more stringent. Indoor LED intelligent lighting system is a development trend. The existing LED dimming methods include wall-mounted dimming and infrared dimming. There is a certain lead wire between the wall-mounted dimmer and the LED lighting tube, which is not only complicated to route, but also has high cost and certain energy loss

Although infrared dimming avoids wiring problems, its dimming distance is limited and requires an external control board to manually send dimming signals, and the dimming accuracy is not high

Artificially adjusting the light intensity generally cannot achieve the best lighting state, so the existing dimming methods are neither convenient nor environmentally friendly.

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