LED lamp with dimming function

Abstract

The invention belongs to the field of LED lamps and discloses an LED lamp with a dimming function. An output end of a PWM signal generation circuit is connected to a G end of a field effect transistorQ1, a D end of the field effect transistor Q1 is connected to a power supply Vcc, an S end of the field effect transistor Q1 is reversely connected with a voltage stabilizing diode D1, and another end of the voltage stabilizing diode D1 is grounded. The voltage stabilizing diode D1 is also connected in series with an inductor L and a capacitor C1. An output end of the inductor L is connected withan LED light-emitting element which is formed by connecting a plurality of light-emitting diodes in series, another end of the light-emitting element is connected to a D end of a field effect transistor Q2, a G end of the field effect transistor Q2 is connected to an input pin of a single-chip microcomputer, an S end of the field effect transistor Q2 is connected to the ground through a resistorR1, and the single-chip microcomputer is connected with the Bluetooth module. According to the LED lamp, a Buck conversion topology circuit constant-current driving mode is adopted by a driving powersupply circuit, the circuit structure is simple, the voltage stabilization effect is efficient, the parallel connection of a plurality of groups of light-emitting elements can be realized, the expansion is carried out according to needs, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of LED lamps, in particular to an LED lamp with dimming function. Background technique [0002] With the development of new semiconductor light-emitting materials and the continuous improvement of manufacturing processes and the continuous improvement of high-power LED integrated driver chips, high-brightness and high-power light-emitting diode lighting sources have gradually entered daily life due to their advantages of high efficiency, energy saving, and environmental protection. Gradually replace incandescent lamps, fluorescent lamps, etc. as new light sources in the field of general lighting. In lighting, the correlated color temperature is generally used to measure the dyeability of white light, and it is measured by the Kelvin scale (K). The color temperature range of warm white light such as incandescent lamps and warm white fluorescent lamps is 2000-4100K, and the color temperature range of cool whit...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a bluetooth color temperature LED driving power supply for the difficulties of complex LED color temperature circuit and low driving efficiency in the prior art scheme.

Images