A led driver that can suppress interference to car radio frequency bands

A technology of LED driver and radio, which is applied to lighting devices, light sources, electric light sources, etc., to achieve the effect of improving the use effect

Active Publication Date: 2016-07-06
GUANGDONG NRE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a LED driver capable of suppressing interference to the frequency band of the car radio, so as to solve the technical problem that the high-frequency noise generated by the LED driver in the prior art can receive a certain frequency signal of the car radio

Method used

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  • A led driver that can suppress interference to car radio frequency bands

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Embodiment Construction

[0011] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0012] Such as figure 1 As shown in the circuit structure diagram of the LED driver provided by the present invention, the circuit specifically includes three circuits: a first high-frequency noise control circuit, an LED driver constant voltage / constant current control circuit, and a second high-frequency noise control circuit. The first high frequency noise control circuit is set at the input end of the LED driver constant voltage / constant current control circuit, and the second high frequency noise control circuit is set at the output end of the LED driver constant voltage / constant current control circuit. The first high-frequency noise control circuit includes a first common-mode inductor LF2 and a first ceramic capacitor C3, and the...

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Abstract

The invention discloses an LED (Light Emitting Diode) driver capable of suppressing interference with car radio frequency bands, which comprises a first high-frequency noise control circuit, an LED driver constant voltage / constant current control circuit and a second high-frequency noise control circuit, wherein the first high-frequency noise control circuit and the second high-frequency noise control circuit are respectively arranged on an input end and an output end of the LED driver constant voltage / constant current control circuit. By adopting the LED driver, high-frequency noise generated when the LED driver is operated can be effectively filtered, so that a radio can be normally heard at any frequency band from 88 to 108 MHz, and the using effect of the car radio can be effectively improved.

Description

technical field [0001] The invention relates to an LED driver, in particular to an LED driver capable of suppressing interference to car radio frequency bands. Background technique [0002] LED lighting technology is more and more widely used in the field of automotive lighting, but because the LED driver will generate high-frequency noise when it is working, when the LED is lit, the high-frequency noise generated by it will interfere with the radio (especially the radio In the case of FM88~108MHZ), the reception of the signal makes a certain frequency of the radio unable to be received normally, which in turn affects the use of the radio by the people in the car. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] The purpose of the present invention is to provide an LED driver capable of suppressing interference to the frequency band of the car radio, so as to solve the technical problem that the high-frequency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 陈华
Owner GUANGDONG NRE TECH
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