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An off-and-halt type LED drive circuit

An LED drive and circuit technology, applied in electric light sources, electrical components, electroluminescent light sources, etc., can solve problems such as low flexibility, large loss, and complicated driving, and achieve accurate and reliable control, low component cost, and circuit structure. simple effect

Inactive Publication Date: 2017-11-07
盐城莱廷绍工业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a LED drive circuit that can be turned off immediately to solve the problems of complicated drive, low flexibility and large loss in the prior art

Method used

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  • An off-and-halt type LED drive circuit

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Embodiment Construction

[0023] Such as figure 1 As shown, an LED drive circuit that turns off immediately includes an input rectifier circuit 1, the input rectifier circuit 1 is electrically connected to an output discharge circuit 2, and the output discharge circuit 2 includes a MOS transistor Q2, a MOS transistor Q3, a capacitor C3, and a capacitor C4 , resistor R2, resistor R3, resistor R4 and resistor R5, the source of MOS transistor Q2 is electrically connected to resistor R2, the drain of MOS transistor Q2 is grounded, and the gate of MOS transistor Q2 is electrically connected to resistor R5 and MOS transistor Q3 respectively The drain, the gate and the source of the MOS transistor Q3 are respectively electrically connected to the anode of the capacitor C4, the resistor R3 is connected in series with the resistor R4, the resistor R4 is connected in parallel with the capacitor C4, and the capacitor C3 is connected in parallel with the series connected resistors R3 and R4. The input rectificatio...

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PUM

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Abstract

The invention provides an off-and-halt type LED drive circuit comprising an input rectifier circuit. The input rectifier circuit is electrically connected to an output discharge circuit; the output discharge circuit comprises a MOS Q2, a MOS Q3, a capacitor C3, a capacitor C4, a resistor R2, a resistor R3, a resistor R4 and a resistor R5; a source electrode of the MOS Q2 is electrically connected to the resistor R2; and a drain electrode of the MOS Q2 is grounded; a grid electrode of the MOS Q2 is separately electrically connected to the resistor R5 and a drain electrode of the MOS Q3; a gate electrode and a source electrode of the MOS Q3 are separately electrically connected to a positive electrode of the capacitor C4; the resistor R3 is connected in series with the resistor R4; the resistor R4 and the capacitor C4 are connected in parallel; and the capacitor C3 is connected in parallel with the resistor R3 and the resistor R4 which are in series connection. The off-and-halt type LED drive circuit of the invention has advantages of small loss, flexible control, and being capable of realizing stable and timely turn-off.

Description

technical field [0001] The invention belongs to the field of LED driving control, and in particular relates to an LED driving circuit which can be turned off immediately. Background technique [0002] While LED is shining brightly, LED driving power supply is the top priority in the development of LED industry chain. The life and reliability of LED driving power supply directly affect the long life of LED light source. Therefore, while the LED industry chain continues to integrate and develop, the maturity of LED drive power technology plays a decisive factor. Due to the rapid development of the LED industry in recent years, it has gradually shifted from the direction of government agency lighting to civilian lighting, benefiting from a series of policies recently issued by the country to encourage the development of the LED industry, but it has also brought many problems. The problem of LED driving power is exposed. [0003] In the existing technology, multiple capacitors...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 董拥刚贵彬力
Owner 盐城莱廷绍工业技术有限公司