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

Abstract

The invention discloses an LED (light emitting diode) intelligent constant current and constant voltage driving power supply, which comprises a power supply input unit, a rectification unit, a power supply output unit and a control circuit, wherein the power supply input unit is externally connected with commercial power; the power supply output unit is connected with an LED load; the power supply input unit, the rectification unit and the power supply output unit are sequentially connected; a constant current circuit and a constant voltage circuit are respectively connected between the rectification 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 respectively connected with the constant current circuit and the constant voltage circuit; on the other hand, the control circuit is respectively connected with a current sampling circuit and a voltage sampling circuit. The control circuit is used for controlling the alternate work of the constant voltage circuit and the constant current circuit, so that the work of the LED load is more stable; the normal work of the LED load is ensured.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an LED intelligent constant-current and constant-voltage driving 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, high eff...

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

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