ballast driven led lamp protection circuit
A technology of LED lamp tube and protection circuit, which is applied in the direction of electric lamp circuit arrangement, electric light source, lighting device, etc., can solve problems such as burnout, and achieve the effect of effective arc prevention.
Active Publication Date: 2017-08-08
谷原光电科技(上海)有限公司
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Problems solved by technology
LED tubes that do not have the function of anti-arc are often burned down the moment they are inserted into a live lamp holder before normal use
Method used
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Embodiment Construction
[0039] Referring to the accompanying drawings, the present invention will be further described.
[0040] A ballast-driven LED lamp protection circuit, including a high-frequency rectification circuit (1), an arc signal sampling and forming circuit (2), a control switch circuit (3), an LED lighting component circuit (4) and a voltage absorption circuit (5), arc signal sampling and forming circuit (2) The primary winding of the arc signal sampling transformer transformer T1 is connected in series to the high frequency rectification circuit (1) and the two ends of the electronic ballast drive signal to input the lamp pin A, Between B, the arc signal sampling and forming circuit (2) is also connected to the control switch circuit (3). After the main control switch tube Q2 in the control switch circuit (3) is connected in parallel with the voltage absorption circuit (5), it is connected to the LED light-emitting component The circuit (4) is connected in series, when the output arc ...
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The invention provides a ballast-driven LED lamp protection circuit, including a high-frequency rectification circuit, an arc signal sampling and forming circuit, a control switch circuit, an LED light-emitting component circuit and a voltage absorbing circuit, and arc signal sampling and forming circuits. The arc signal sampling circuit is connected in series between the high-frequency rectification circuit and the two ends of the electronic ballast drive signal input between the lamp pins A and B. The arc signal sampling and forming circuit is also connected with the control switch circuit to control the main switch circuit. After the control switch tube is connected in parallel with the voltage absorption circuit, it is connected in series with the LED light-emitting component circuit. When the arc signal sampling and the output arc sampling voltage of the forming circuit are greater than the threshold voltage of the voltage limit circuit of the arc signal sampling and forming circuit, the control The switch circuit controls its main control switch tube to be disconnected, the voltage absorbing circuit reduces the voltage at both ends of the LED light-emitting component circuit, and extinguishes the arc between the two ends of the electronic ballast drive signal input lamp pins A and B.
Description
technical field [0001] The invention relates to the field of LED lighting, in particular to a ballast-driven LED lamp protection circuit. Background technique [0002] In recent years, LED lighting has shown a rapid development trend due to its many advantages such as high energy efficiency, long life, small size and environmental protection. An era of replacing fluorescent lighting with LED lighting has come. [0003] There are two basic ways to drive LEDs, custom LED drivers and electronic ballasts for fluorescent lamps. In lighting fixtures with tubular fluorescent lamps, the use of the original electronic ballast as the driver of the LED lamp can not only save the need to configure a dedicated LED driver, but also save a lot of manpower during the renovation of the lamp. This is especially true for countries or regions where labor costs are high. [0004] More and more attention has been paid to the protection of LED lamp beads. In addition to overheat protection, ov...
Claims
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IPC IPC(8): H05B37/02
Inventor 毛松领
Owner 谷原光电科技(上海)有限公司