Ballast driven LED (Light Emitting Diode) lamp tube 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: 2015-12-02
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 (Light Emitting Diode) lamp tube protection circuit. The ballast driven LED lamp tube protection circuit comprises a high-frequency rectifying circuit, an arc signal sampling and forming circuit, a control switching circuit, an LED luminous assembly circuit and a voltage absorbing circuit, wherein an arc signal sampling circuit in the arc signal sampling and forming circuit is serially connected with the high-frequency rectifying circuit and between two end input lamp pins A, B of electronic ballast driving signals, the arc signal sampling and forming circuit is further connected with the control switching circuit, a main control switching tube in the control switching circuit is connected in parallel with the voltage absorbing circuit and then is serially connected with the LED luminous assembly circuit, the control switching circuit controls the main control switching tube to be disconnected after the output arc sampling voltage of the arc signal sampling and forming circuit is larger than the voltage limiting circuit threshold voltage of the arc signal sampling and forming circuit, and the voltage absorbing circuit reduces the voltage at the two ends of the LED luminous assembly circuit to extinguish arc between the two input lamp pins A, B of the electronic ballast driving signals.
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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Inventor 毛松领
Owner 谷原光电科技(上海)有限公司