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Double-ended input A+B type LED fluorescent lamp circuit

A LED fluorescent lamp, double-terminal input technology, applied in the direction of light source, electric light source, electrical components, etc., can solve the problems that cannot meet the requirements of luminous brightness

Active Publication Date: 2019-04-05
绍兴久芯电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And such LED light-emitting circuit voltage, when used as a class A LED fluorescent lamp, because the electronic ballast is a device with constant current output, it cannot meet the user's requirements for luminous brightness.

Method used

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  • Double-ended input A+B type LED fluorescent lamp circuit
  • Double-ended input A+B type LED fluorescent lamp circuit
  • Double-ended input A+B type LED fluorescent lamp circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: if image 3 As shown, a dual-terminal input A+B class LED fluorescent lamp circuit includes a first rectifier circuit, a second rectifier circuit, an EMI circuit, an LED lighting circuit, a filter circuit, a class B anti-shock circuit and a voltage trigger circuit, the first The rectification circuit and the second rectification circuit respectively have a live line input terminal, a neutral line input terminal, an output terminal and a ground terminal; the EMI circuit has an input terminal, an output terminal and a ground terminal; Negative pole, Class B anti-shock circuit has detection terminal, output terminal and ground terminal, the output terminal of the first rectification circuit, the output terminal of the second rectification circuit, the detection terminal of Class B anti-electric shock circuit and the input terminal of the EMI circuit are connected, EMI The ground terminal of the circuit is connected to the output terminal of the class B anti...

Embodiment 2

[0028] Embodiment 2: This embodiment is basically the same as Embodiment 1, the difference is:

[0029] Such as Figure 4 As shown, in this embodiment, the buck-boost constant current circuit includes a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a first Three resistors R3, the first inductor L1 and the first integrated circuit chip U1, the model of the first integrated circuit chip U1 is MT7845, the first diode D1 and the second diode D2 are high-frequency rectifier diodes, the first integrated circuit The 5th pin of the circuit chip U1 is connected to the 6th pin and its connecting end is the input end of the buck-boost constant current circuit, the anode of the first diode D1 is the negative output end of the buck-boost constant current circuit, and the second and second diodes are connected to each other. The negative pole of the pole tube D2 is the positive output terminal of the buck-boost co...

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PUM

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Abstract

The invention discloses a double-ended input A+B type LED fluorescent lamp circuit comprising a first rectifying circuit, a second rectifying circuit, an EMI circuit, an LED light-emitting circuit, afilter circuit, a B-type anti-electric-shock circuit, a voltage trigger circuit, a step-up and step-down constant-current circuit, a high-frequency turn-on circuit and a controllable rectifying circuit. The double-ended input A+B type LED fluorescent lamp circuit can provide high operating voltage for the LED light-emitting circuit on the basis of low cost. Whatever the circuit is used as an A-type LED fluorescent lamp circuit or a B-type LED fluorescent lamp circuit, the maximum power can meet the user's requirements.

Description

technical field [0001] The invention relates to an LED fluorescent lamp circuit, in particular to an A+B class LED fluorescent lamp circuit with double-terminal input. Background technique [0002] Traditional fluorescent lamps usually include lamp holders and fluorescent tubes, and the appearance of the fluorescent tubes is as follows figure 1 As shown, the traditional fluorescent tube is usually a tubular structure, including the tube body and the fluorescent lamp circuit inside. There are two connecting pins (P1 and P2, P3 and P4) at both ends of the tube body. When the fluorescent tube is installed on When the lamp stand is on, the connecting pins P1, P2, P3 and P4 connect the fluorescent lamp circuit inside the tube body with the external circuit (mains power or ballast). [0003] In recent years, LED fluorescent lamps with the advantages of environmental protection and energy saving have been more and more widely used. LED fluorescent lamps include lamp holders and L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/10H05B45/00Y02B20/30
Inventor 赵肖玲
Owner 绍兴久芯电子科技有限公司
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