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LED drive circuit and LED lamp

A LED drive and circuit technology, applied in the field of electric lighting, can solve the problems of linear constant current power supply instability and other problems, and achieve the effects of improving application reliability, low cost, and low ripple content

Pending Publication Date: 2020-10-13
尹尚平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide an LED drive circuit that solves the problem of inconstant power that occurs when the linear constant current power supply is floating in the mains.

Method used

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  • LED drive circuit and LED lamp

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] refer to figure 1 , is an LED driving circuit disclosed in the present invention, including an EMC circuit 1, a rectification module 2, an active power factor correction and constant voltage module 3 and a linear constant current module 4.

[0039] The EMC circuit eliminates internal and external interference, the rectification module 2 rectifies the electrical signal output by the power supply into a DC signal; the active power factor correction and constant voltage module 3 is connected between the rectification module 2 and the linear constant current module 4, and the received DC The signal is processed to improve the power factor and output a constant voltage; the linear constant current module 4 includes a constant current control chip, and the output current value setting port of the constant current control chip is connected to a current limiti...

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Abstract

The invention relates to an LED drive circuit and belongs to the field of illumination. The LED drive circuit comprises a rectification module, an active power factor correction and constant voltage module and a linear constant current module; the rectification module rectifies an electric signal output by a power supply into a direct-current signal; the active power factor correction and constantvoltage module is connected between the rectification module and the linear constant current module, performs power factor improvement processing on the received direct current signal, and outputs aconstant voltage; the linear constant-current module comprises a constant-current control chip; an output current value setting port of the constant-current control chip is connected with a current-limiting resistor; one end of the current-limiting resistor, which is back to the constant-current control chip, is grounded; and the constant-current control chip is provided with a PWM dimming and toning port or is connected with a dimming and toning circuit. With the LED drive circuit adopted, the problem that the power of a linear constant-current power supply is not constant when a mains supplyfloats can be solved. The invention also provides an LED lamp and belongs to the field of illumination.

Description

technical field [0001] The invention relates to the technical field of electric lighting, in particular to an LED driving circuit and 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. [0003] Existing circuit existence modes applied in this field can be roughly divided into three categories. One is an isolated constant current power supply, the other is a non-isolated constant current power supply, and the third is a linear constant current power supply. Isolated constant current power supplies are inefficient and expensive. Non-isolated constant current power supplies have high efficiency, and the upper limit of load voltage generally cannot exceed about 180V, and those with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/3725H05B45/355H05B45/34H05B45/345
CPCH05B45/34H05B45/345H05B45/355H05B45/3725Y02B20/30
Inventor 尹尚平
Owner 尹尚平
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