LED (light-emitting diode) constant-current driving circuit and LED lamp

Abstract

The invention relates to an LED (light-emitting diode) constant-current driving circuit which comprises a first filtering module, a voltage transformation module, a rectifying module, a second filtering module and a constant-current module, wherein the input end of the first filtering module is connected with the input end of an alternating-current power supply and used for filtering electromagnetic interference between the alternating-current power supply and the driving circuit; the voltage transformation module carries out voltage reduction on an alternating current signal filtered by the first filtering module; the rectifying module is used for receiving an alternating current signal output by the voltage transformation module, rectifying the alternating current signal into a direct current signal and providing the direct current signal to the second filtering module; the second filtering module is used for carrying out voltage stabilization on the direct current signal and outputting to direct current signal subjected to voltage stabilization to the constant-current module; and the constant-current module is connected with the second filtering module and used for receiving an electrical signal subjected to voltage stabilization and providing constant currents to an LED light source group. The invention also relates to an LED lamp. In the LED constant-current driving circuit, the first filtering module is arranged at the input end of the alternating-current power supply and used for filtering the high-frequency electromagnetic interference between the alternating-current power supply and the driving circuit, thereby eliminating the influence of the electromagnetic interference on electronic equipment and safely and reliably driving the LED lamp to work.

Description

【Technical field】 [0001] The invention relates to the field of electric lighting, in particular to an LED constant current drive circuit, and also to an LED lamp. 【Background technique】 [0002] As a new type of light source, LED (Light Emitting Diode) has the characteristics of energy saving, environmental protection and high efficiency. The technology has been mature and applied in various fields. LEDs are widely used as lighting sources, and various LED drive circuits have appeared accordingly. Traditionally, AC-DC switching power supply technology is used to drive LEDs in places with AC 220V, but it has disadvantages such as complex circuits, easy damage, and strong (high-frequency) electromagnetic interference, especially in places with strict interference requirements. , will seriously affect other electronic devices around, and bring serious inconvenience to users. 【Content of invention】 [0003] Based on this, it is necessary to provide an LED constant current dr...

AI Technical Summary

Problems solved by technology

Traditionally, AC-DC switching power supply technology is used to drive LEDs in places with AC 220V, but it has disadvantages such as complex circuits, easy damage, and strong (high-frequency) electromagnetic interference, especially in places with strict interference requirements. , will seriously affect other electronic devices around, and bring serious inconvenience to users

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