CN203761662U - LED lamp drive circuit - Google Patents

LED lamp drive circuit Download PDF

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Publication number
CN203761662U
CN203761662U CN201420158905.7U CN201420158905U CN203761662U CN 203761662 U CN203761662 U CN 203761662U CN 201420158905 U CN201420158905 U CN 201420158905U CN 203761662 U CN203761662 U CN 203761662U
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CN
China
Prior art keywords
circuit
resistance
constant current
led lamp
current control
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420158905.7U
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Chinese (zh)
Inventor
邹亮
刘亮
袁永刚
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Suzhou Dongshan Precision Manufacturing Co Ltd
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Suzhou Dongshan Precision Manufacturing Co Ltd
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Priority to CN201420158905.7U priority Critical patent/CN203761662U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses an LED lamp drive circuit at least comprising a rectifier circuit and the like. The rectifier circuit is electrically connected with a filter circuit. Input voltage is connected to the filter circuit through the rectifier circuit; the output end of the filter circuit outputs drive voltage to an anode of an LED lamp. A linear constant current control circuit is electrically connected with a cathode of the LED lamp. A step-down circuit is electrically connected with the output end of the filter circuit and converts the drive voltage into reference voltage. An infrared sensing circuit is electrically connected with the step-down circuit and the linear constant-current control circuit. The reference circuit is input to the infrared sensing circuit. The infrared sensing circuit outputs an infrared sensing signal. The linear constant current control circuit controls on and off of the LED drive circuit according to the infrared sensing signal. The LED lamp drive circuit is low in cost; the whole LED lamp is lower in cost.

Description

LED lamp drive circuit
Technical field
The utility model relates to a kind of drive circuit, particularly relates to a kind of LED lamp drive circuit.
Background technology
That conventional incandescent (tungsten lamp) consumes energy is high, the life-span is short, under the overall situation of global resources anxiety, gradually, forbidden producing by national governments, due to LED(Light Emitting Diode, light-emitting diode) be a kind of solid-state semiconductor device that can be visible ray by electric energy conversion, it can be directly luminous energy electric energy conversion, and LED has that volume is little, power consumption is low, long service life, environmental protection, sturdy and durable, brightness advantages of higher, and extensive use in daily life.
Existing LED lamp (such as fluorescent lamp, can be specifically T8 lamp) is not with infrared induction function, adopts Switching Power Supply scheme in addition with the half aluminum pipe lamp drive circuit of partly moulding of infrared induction function, drives cost high, and whole lamp price is high.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of LED lamp drive circuit, and its cost is low, reduces whole lamp price.
The utility model solves above-mentioned technical problem by following technical proposals: a kind of LED lamp drive circuit, at least comprises a rectification circuit, a filter circuit, a linearity constant current control circuit, a reduction voltage circuit, an infrared induction circuit; Described rectification circuit and described filter circuit are electrically connected, and an input voltage passes through described rectification circuit and described filter circuit, and are exported the anode of driving voltage to LED lamp by the output of filter circuit; The negative electrode of described linearity constant current control circuit and described LED lamp is electrically connected; The output of described reduction voltage circuit and described filter circuit is electrically connected, to change described driving voltage into a reference voltage; Described infrared induction circuit is electrically connected with described reduction voltage circuit, described linearity constant current control circuit respectively, described reference voltage inputs to described infrared induction circuit, and described infrared induction circuit is exported an infrared induction signal, described linearity constant current control circuit is according to described infrared induction signal controlling LED drive circuit break-make.
Preferably, described linearity constant current control circuit comprises the first constant current control chip, one the 5th resistance, one the 6th resistance, described the 5th resistance and described the 6th resistance are in parallel, and described the 5th resistance one end is electrically connected on described the first constant current control chip, described the 5th resistance other end ground connection.
Preferably, described linearity constant current control circuit also comprises the second constant current control chip, one the 7th resistance, one the 8th resistance, described the 7th resistance and described the 8th resistance are in parallel, and one end of described the 7th resistance is electrically connected on described the second constant current control chip, the other end ground connection of described the 7th resistance, and the circuit of described the second constant current control chip, described the 7th resistance, described the 8th resistance composition is in parallel with the circuit that described the first constant current control chip, described the 5th resistance, described the 6th resistance form.
Preferably, the output of described the first constant current control chip or the second constant current control chip and described filter circuit is electrically connected, to receive described driving voltage.
Preferably, described the first constant current control chip or the second constant current control chip adopt SM2083 cake core.
Preferably, described infrared induction circuit comprises an infrared induction transducer.
Preferably, described infrared induction circuit also comprises the tenth resistance, the 11 resistance, described the tenth resistance is connected successively with described the 11 resistance, and described the tenth input of resistance and the output of described reduction voltage circuit are electrically connected, the output head grounding of described the 11 resistance, the output of described the tenth resistance is exported a time delay voltage to described infrared induction transducer.
Preferably, described infrared induction transducer adopts AM412 type digital intelligent pyroelectric infrared sensor.
Preferably, described reduction voltage circuit comprises the first resistance, the 3rd resistance, voltage-stabiliser tube, the second electric capacity, ultra low differential pressure voltage stabilizing chip, the 4th electric capacity, the output of wherein said the first resistance and described filter circuit is electrically connected, described the first resistance and described the 3rd resistance, described voltage-stabiliser tube is connected successively, and the output head grounding of described voltage-stabiliser tube, described the second electric capacity is in parallel with described voltage-stabiliser tube, the output of described the 3rd resistance is electrically connected on described ultra low differential pressure voltage stabilizing chip, the output of described ultra low differential pressure voltage stabilizing chip is electrically connected on the input of described infrared induction circuit.
Preferably, described ultra low differential pressure voltage stabilizing chip adopts HT7230 type voltage stabilizing chip.
Preferably, described rectification circuit is made up of the diode of four head and the tail series connection.
Preferably, described filter circuit is formed in parallel by the first electric capacity and the second resistance, and one end of described the first electric capacity is electrically connected on the output of described rectification circuit, and the other end ground connection of described the first electric capacity.
Preferably, described rectifier bridge is connected with at least one fuse.
Preferably, between described linearity constant current control circuit and described infrared induction circuit, be connected the 4th resistance and the 12 resistance.
Preferably, between described the 4th resistance and the 12 resistance, connect a connector.
Positive progressive effect of the present utility model is: the utility model LED lamp drive circuit adopts linear constant current tunable optical control chip, and cost is low, reduces whole lamp price.Infrared induction transducer of the present utility model adopts AM412 type digital intelligent pyroelectric infrared sensor, and without additional decoding chip and signal amplification chip, cost is low like this.The utility model adopts two linear constant current tunable optical control chips, thereby infrared induction transducer detects the low and high level of output that has or not of thermal source and delivers to linear constant current tunable optical control chip, by the size of linear constant current tunable optical control chip control output current, thereby realize the switching function of LED lamp.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model LED lamp drive circuit.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
As shown in Figure 1, the utility model LED lamp drive circuit comprises rectification circuit 1, one filter circuit 2, a linearity constant current control circuit 3, a reduction voltage circuit 4, an infrared induction circuit 5;
Described rectification circuit 1 is electrically connected with described filter circuit 2, and an input voltage U0 passes through described rectification circuit 1 and described filter circuit 2, and is exported the anode of driving voltage U1 to LED lamp by the output of filter circuit 2;
Described linearity constant current control circuit 3 is electrically connected with the negative electrode of described LED lamp;
Described reduction voltage circuit 4 is electrically connected with the output of described filter circuit 2, to change described driving voltage U1 into a reference voltage U2;
Described infrared induction circuit 5 is electrically connected with described reduction voltage circuit 4, described linearity constant current control circuit 3 respectively, described reference voltage U2 inputs to described infrared induction circuit 5, and described infrared induction circuit 5 is exported an infrared induction signal, described linearity constant current control circuit 3 is according to described infrared induction signal controlling LED drive circuit break-make.
Wherein, described linearity constant current control circuit 3 comprises the first constant current control chip V1, one the 5th resistance R 5, one the 6th resistance R 6, described the 5th resistance R 5 is in parallel with described the 6th resistance R 6, and described the 5th resistance R 5 one end are electrically connected on described the first constant current control chip V1, described the 5th resistance R 5 other end ground connection.Better, described linearity constant current control circuit 3 also comprises the second constant current control chip V2, one the 7th resistance R 7, one the 8th resistance R 8, described the 7th resistance R 7 is in parallel with described the 8th resistance R 8, and one end of described the 7th resistance R 7 is electrically connected on described the second constant current control chip V2, the other end ground connection of described the 7th resistance R 7, and the circuit that described the second constant current control chip V2, described the 7th resistance R 7, described the 8th resistance R 8 form is in parallel with the circuit that described the first constant current control chip V1, described the 5th resistance R 5, described the 6th resistance R 6 form.The 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8 are all sampling resistors.Between the first constant current control chip V1 and the second constant current control chip V2, be connected the other end ground connection of the 3rd capacitor C 3 with one end of the 3rd capacitor C 3.
Wherein, the output of described the first constant current control chip V1 or the second constant current control chip V2 and described filter circuit 2 is electrically connected, to receive described driving voltage U1.
Wherein, described the first constant current control chip V1 or the second constant current control chip adopt SM2083 cake core.
Wherein, described infrared induction circuit 5 comprises an infrared induction transducer V3.Better, described infrared induction transducer adopts AM412 type digital intelligent pyroelectric infrared sensor, and without additional decoding chip and signal amplification chip, cost is low like this.
Wherein, described infrared induction circuit 5 also comprises the tenth resistance R 10 and the 11 resistance R 11, described the tenth resistance R 10 is connected successively with described the 11 resistance R 11, and described the tenth input of resistance R 10 and the output of described reduction voltage circuit are electrically connected, the output head grounding of described the 11 resistance R 11, the output of described the tenth resistance R 10 is exported a time delay voltage U 3 to described infrared induction transducer.The tenth resistance R the 10 and the 11 resistance R 11 is used for dividing potential drop, and time delay voltage U 3 is input to infrared sensor, and the output delay time of transducer is set.
Wherein, described reduction voltage circuit 4 comprises the first resistance R 1, the 3rd resistance R 3, voltage-stabiliser tube D1, the second capacitor C 2, ultra low differential pressure voltage stabilizing chip V4, the 4th capacitor C 4, wherein said the first resistance R 1 is electrically connected with the output of described filter circuit 2, described the first resistance R 1 and described the 3rd resistance R 3, the series connection successively of described voltage stabilizing D1 pipe, and the output head grounding of described voltage-stabiliser tube D1, described the second capacitor C 2 is in parallel with described voltage-stabiliser tube D1, the output of described the 3rd resistance R 3 is electrically connected on described ultra low differential pressure voltage stabilizing chip V4, the output of described ultra low differential pressure voltage stabilizing chip V4 is electrically connected on the input of described infrared induction circuit 5.The 4th capacitor C 4 is used for the interference component of filtering voltage stabilizing chip output voltage.
Wherein, described ultra low differential pressure voltage stabilizing chip V4, adopts HT7230 type voltage stabilizing chip.
Wherein, described rectification circuit 1 is made up of the diode of four head and the tail series connection, and simple in structure like this, cost is low.
Wherein, described filter circuit 2 is formed in parallel by the first capacitor C 1 and the second resistance R 2, and one end of described the first capacitor C 1 is electrically connected on the output of described rectification circuit, and the other end ground connection of described the first capacitor C 1.The first capacitor C 1 is filter capacitor, and the second resistance R 2 is discharge resistance.
Wherein, described rectifier bridge 1 is connected with at least one fuse F1, and fuse F1 plays basic safeguard protection to circuit, and in the time that rational single failure appears in circuit, fuse F1 can play a basic protective effect for circuit.
Wherein, between described linearity constant current control circuit and described infrared induction circuit, be connected the 4th resistance R 4 and the 12 resistance R 12.The 4th resistance R 4 determines the minimum brightness that LED lamp extinguishes, and the 12 resistance R 12 is used for regulating the output current size of infrared induction transducer.
Wherein, between described the 4th resistance R the 4 and the 12 resistance R 4, connect a connector P1, connector P1 is used for connecting infrared induction transducer and power supply.
The operation principle of the utility model LED lamp drive circuit is as follows: alternating current is converted into direct current by rectifier bridge BD1, the first resistance R 1, the 3rd resistance R 3, voltage-stabiliser tube D1, the second capacitor C 2 provides the voltage of a 3.3V to ultra low differential pressure voltage stabilizing chip V4, ultra low differential pressure voltage stabilizing chip V4 becomes the voltage transitions of 3.3V the voltage of 3V to infrared induction transducer V3, when hot outer inductive pick-up V3 senses control signal, the level signal of a 3V of infrared induction transducer V3 output is given the DIM pin of the first linear constant current tunable optical control chip V1 and the DIM pin of the second linear constant current tunable optical control chip V2, thereby realize switch control functions, and then by controlling the DIM pin of the first linear constant current tunable optical control chip V1, the DIM pin of the second linear constant current tunable optical control chip V2 can reach the object of regulation output electric current.Connect high level or when unsettled at the DIM pin of the DIM pin of the first linear constant current tunable optical control chip V1, the second linear constant current tunable optical control chip V2, output current carrys out the size of stabilizing output current by the inside of the first linear constant current tunable optical control chip V1, the internal regulation of the second linear constant current tunable optical control chip V2 after being sampled by the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8.The large I that the DIM pin of the first linear constant current tunable optical control chip V1, the DIM pin of the second linear constant current tunable optical control chip V2 all connect the 4th resistance R 4 determines the minimum brightness that LED lamp extinguishes, and minimum brightness scope is 25%-100%.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect to solution of the present utility model further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims (15)

1. a LED lamp drive circuit, at least comprises a rectification circuit, a filter circuit, a linearity constant current control circuit, a reduction voltage circuit, an infrared induction circuit;
Described rectification circuit and described filter circuit are electrically connected, and an input voltage passes through described rectification circuit and described filter circuit, and are exported the anode of driving voltage to LED lamp by the output of filter circuit;
The negative electrode of described linearity constant current control circuit and described LED lamp is electrically connected;
The output of described reduction voltage circuit and described filter circuit is electrically connected, to change described driving voltage into a reference voltage;
Described infrared induction circuit is electrically connected with described reduction voltage circuit, described linearity constant current control circuit respectively, described reference voltage inputs to described infrared induction circuit, and described infrared induction circuit is exported an infrared induction signal, described linearity constant current control circuit is according to described infrared induction signal controlling LED drive circuit break-make.
2. LED lamp drive circuit as claimed in claim 1, it is characterized in that, described linearity constant current control circuit comprises the first constant current control chip, one the 5th resistance, one the 6th resistance, described the 5th resistance and described the 6th resistance are in parallel, and described the 5th resistance one end is electrically connected on described the first constant current control chip, described the 5th resistance other end ground connection.
3. LED lamp drive circuit as claimed in claim 2, it is characterized in that, described linearity constant current control circuit also comprises the second constant current control chip, one the 7th resistance, one the 8th resistance, described the 7th resistance and described the 8th resistance are in parallel, and one end of described the 7th resistance is electrically connected on described the second constant current control chip, the other end ground connection of described the 7th resistance, and described the second constant current control chip, described the 7th resistance, circuit and the described first constant current control chip of described the 8th resistance composition, described the 5th resistance, the circuit parallel connection of described the 6th resistance composition.
4. LED lamp drive circuit as claimed in claim 3, is characterized in that, the output of described the first constant current control chip or the second constant current control chip and described filter circuit is electrically connected, to receive described driving voltage.
5. LED lamp drive circuit as claimed in claim 3, is characterized in that, described the first constant current control chip or the second constant current control chip adopt SM2083 cake core.
6. LED lamp drive circuit as claimed in claim 1, is characterized in that, described infrared induction circuit is an infrared induction transducer.
7. LED lamp drive circuit as claimed in claim 6, is characterized in that, described infrared induction transducer adopts AM412 type digital intelligent pyroelectric infrared sensor.
8. LED lamp drive circuit as claimed in claim 6, it is characterized in that, described infrared induction circuit also comprises the tenth resistance, the 11 resistance, described the tenth resistance is connected successively with described the 11 resistance, and described the tenth input of resistance and the output of described reduction voltage circuit are electrically connected, the output head grounding of described the 11 resistance, the output of described the tenth resistance is exported a time delay voltage to described infrared induction transducer.
9. LED lamp drive circuit as claimed in claim 1, it is characterized in that, described reduction voltage circuit comprises the first resistance, the 3rd resistance, voltage-stabiliser tube, the second electric capacity, ultra low differential pressure voltage stabilizing chip, the 4th electric capacity, the output of wherein said the first resistance and described filter circuit is electrically connected, described the first resistance and described the 3rd resistance, described voltage-stabiliser tube is connected successively, and the output head grounding of described voltage-stabiliser tube, described the second electric capacity is in parallel with described voltage-stabiliser tube, the output of described the 3rd resistance is electrically connected on described ultra low differential pressure voltage stabilizing chip, the output of described ultra low differential pressure voltage stabilizing chip is electrically connected on the input of described infrared induction circuit.
10. LED lamp drive circuit as claimed in claim 9, is characterized in that, described ultra low differential pressure voltage stabilizing chip adopts HT7230 type voltage stabilizing chip.
11. LED lamp drive circuits as claimed in claim 1, is characterized in that, described rectification circuit is made up of the diode of four head and the tail series connection.
12. LED lamp drive circuits as claimed in claim 1, it is characterized in that, described filter circuit is formed in parallel by the first electric capacity and the second resistance, and one end of described the first electric capacity is electrically connected on the output of described rectification circuit, and the other end ground connection of described the first electric capacity.
13. LED lamp drive circuits as claimed in claim 1, is characterized in that, described rectifier bridge is connected with at least one fuse.
14. LED lamp drive circuits as claimed in claim 1, is characterized in that, are connected the 4th resistance and the 12 resistance between described linearity constant current control circuit and described infrared induction circuit.
15. LED lamp drive circuits as claimed in claim 14, is characterized in that, between described the 4th resistance and the 12 resistance, connect a connector.
CN201420158905.7U 2014-04-02 2014-04-02 LED lamp drive circuit Expired - Fee Related CN203761662U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420158905.7U CN203761662U (en) 2014-04-02 2014-04-02 LED lamp drive circuit

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Application Number Priority Date Filing Date Title
CN201420158905.7U CN203761662U (en) 2014-04-02 2014-04-02 LED lamp drive circuit

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105120586A (en) * 2015-10-08 2015-12-02 周玉林 Ultralow-dropout LED flashlight
CN106647870A (en) * 2016-12-01 2017-05-10 重庆依凯科技有限公司 Temperature upper and lower limit control circuit designed based on adjustable voltage-stabilizing rectification technology
WO2017117953A1 (en) * 2016-01-04 2017-07-13 京东方科技集团股份有限公司 Sensor lamp and drive method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105120586A (en) * 2015-10-08 2015-12-02 周玉林 Ultralow-dropout LED flashlight
WO2017117953A1 (en) * 2016-01-04 2017-07-13 京东方科技集团股份有限公司 Sensor lamp and drive method therefor
CN106647870A (en) * 2016-12-01 2017-05-10 重庆依凯科技有限公司 Temperature upper and lower limit control circuit designed based on adjustable voltage-stabilizing rectification technology

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140806

Termination date: 20170402

CF01 Termination of patent right due to non-payment of annual fee