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LED lamp string driving circuit compatible with silicon controlled rectifiers and method

A technology of LED light strings and driving circuits, which is applied in the direction of electrical components, etc., and can solve problems such as performance loss

Pending Publication Date: 2021-12-17
SHENZHEN SHENDIE SEMICON
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a thyristor-compatible LED lamp string driving circuit and method to solve the problem of the LED lamp string driving circuit in an environment with thyristors. The maximum power is about 20% smaller than that of the environment without SCR, which leads to the problem of performance loss

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  • LED lamp string driving circuit compatible with silicon controlled rectifiers and method
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  • LED lamp string driving circuit compatible with silicon controlled rectifiers and method

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Embodiment Construction

[0039] The present invention provides a thyristor-compatible LED light string driving circuit and method. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] In the embodiments and claims, unless the article is specifically limited, "a", "an", "the" and "the" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. Significance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

[0041] I...

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Abstract

The invention discloses an LED lamp string driving circuit compatible with silicon controlled rectifiers and method. The driving circuit comprises a rectification module which is connected with an LED lamp string and is used for converting input alternating current into power supply voltage and outputting the power supply voltage to the LED lamp string, a voltage sampling module which is connected with the rectification module and used for collecting the power supply voltage output by the rectification module and obtaining detection voltage, a detection module which is connected with the voltage sampling module, and is used for comparing the detection voltage with a preset voltage, detecting whether a silicon controlled rectifier is connected or not according to a comparison result, and outputting a judgment result, a reference voltage selection module which is connected with the detection module and is used for outputting reference voltage or reference current according to the judgment result, and a control current source module which is respectively connected with the LED lamp string and the reference voltage selection module and is used for controlling the current of the LED lamp string according to the reference voltage or the reference current. The power of the LED lamp string is controlled to be consistent in an environment with or without the silicon controlled rectifier.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a thyristor-compatible LED lamp string driving circuit and method. Background technique [0002] In the LED light string drive, the effective value of the AC voltage can be changed by cutting the AC phase through the thyristor, so as to achieve the effect of dimming. However, for general thyristors, even if the maximum output power is adjusted, the effective voltage is about 10% smaller than that without thyristors. Therefore, if the current of the LED light string remains constant, the power with the thyristor is 10% smaller than without the thyristor. [0003] In more cases, in order to meet the dimming effect and compatibility, the current of the LED light string will change with the controllable phase change, that is, the effective value of the voltage is 90%, and the effective value of the current is also adjusted to 90%, then the final The output power is only 81%. ...

Claims

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Application Information

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IPC IPC(8): H05B45/30
CPCH05B45/30
Inventor 麦炎全邓迅升陈博
Owner SHENZHEN SHENDIE SEMICON
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