CN205510462U - LED lighting circuit - Google Patents
LED lighting circuit Download PDFInfo
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- CN205510462U CN205510462U CN201620032425.5U CN201620032425U CN205510462U CN 205510462 U CN205510462 U CN 205510462U CN 201620032425 U CN201620032425 U CN 201620032425U CN 205510462 U CN205510462 U CN 205510462U
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- diode
- circuit
- constant current
- lamp bead
- led
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a LED lighting circuit, including rectifier bridge circuit, LED lamp pearl group and linear constant current IC, the rectifier bridge circuit for to come from turns into the DC voltage after alternating current power supply's the alternating voltage rectification, linear constant current IC is used for coming from the DC voltage of rectifier bridge circuit turns into the direct current of invariable size, LED lamp pearl group is equipped with the lamp pearl cluster that the several is established ties mutually, every lamp pearl cluster is equipped with the LED lamp pearl that the several connected in parallel mutually. The utility model discloses compact structure saves external constant current drive, the cost is reduced, and the constant current precision is high. Lamp pearl cluster and synchysis combination can realize damaging the effect that a LED lamp pearl does not influence all the other LED's normal work to make the probability greatly reduced of lamps and lanterns affect using. Make the width that the copper sheet of in the circuit board two circuits of power supply can the maxmizing degree simultaneously to it is a plurality of to make this product concatenate, has practiced thrift wiring end of a thread quantity in the engineering construction, reduces construction cost.
Description
Technical field
This utility model relates to a kind of circuit, particularly relates to a kind of LED illumination circuit.
Background technology
Light emitting diode is a kind of semiconductor electronic component that can be luminous.LED has the advantage not available for conventional light source such as efficiency height, life-span length, not cracky, switching speed height, high reliability, and therefore LED is widely used in every field as lighting source.
Owing to the characteristics of luminescence of LED is the most all expressed as the function of electric current rather than the function of voltage, therefore, constant-current source is used to drive the brightness that can better control over LED.In addition the forward voltage drop excursion of LED is relatively big, and the minor variations of forward voltage can cause bigger forward current to change, thus causes the large change of brightness.So, use drive of constant voltage source it cannot be guaranteed that the concordance of LED luminance, and affect the reliability of LED, life-span and light decay.Therefore, high-brightness LED generally uses constant-current source to drive.
LED drive circuit in the market, the damage of single lamp bead easily causes the operation of whole circuit not freely, and the unreasonable of components and parts setting simultaneously causes project installation difficulty to increase.
Utility model content
The purpose of this utility model is to solve technical problem involved in background technology, it is provided that a kind of LED illumination circuit.
The technical solution of the utility model is:
A kind of LED illumination circuit, including rectifier circuit, LED lamp bead group and linear constant current IC；
Described rectifier circuit, for will be converted into DC voltage after the ac voltage rectifier of alternating current power supply；
Described linear constant current IC, for being converted into the DC current of constant size by the DC voltage from described rectifier circuit；
Described LED lamp bead group is provided with several lamp bead string being in series mutually, and each described lamp bead string is provided with several LED lamp bead being in parallel mutually.
Preferably, also include sampling feedback resistance and buffering electric capacity, described LED lamp bead group, sampling feedback resistance and linear constant current IC are sequentially connected in series, described buffering electric capacity is provided with 2, one of them is connected in parallel on outside the sequential circuit of LED lamp bead group, sampling feedback resistance and linear constant current IC, and another is connected in parallel on outside linear constant current IC.
Preferably, described rectifier circuit is provided with diode D1, D2, D3 and D4, the negative pole of described diode D1 and the negative pole of diode D2 concatenate the pole as power supply circuits, the positive pole of described diode D3 and the positive pole of diode D4 concatenate another pole as power supply circuits, one end that the positive pole of described diode D1 and the negative pole concatenation of diode D3 input as alternating current power supply, the positive pole of described diode D2 and the negative pole concatenation of diode D4 are as the other end of alternating current power supply input.
Preferably, described linear constant current IC is that SO-8 encapsulates or TO252-2 encapsulates or SOT89-3 encapsulation.
Preferably, described linear constant current IC uses CYT1000A chip or CYT1000AE chip or SM2082 chip.
Preferably, described LED illumination circuit whole installation is on circuit boards, described diode D1 and diode D2 is positioned at one end of circuit board, described diode D3 and diode D4 is positioned at the other end of circuit board, the positive pole of described diode D1 is connected by copper sheet with the negative pole of diode D3, and the positive pole of described diode D2 is connected by copper sheet with the negative pole of diode D4.
Preferably, described diode D1, D2, D3 and D4 are IN4007 type diode.
In sum, this utility model has the advantage that
This utility model compact conformation, omitting external constant-current driving, reduce cost, constant current accuracy is high.Lamp bead string mixing combination can realize damaging the effect of the normal work that a LEDs lamp bead does not affect remaining LED, so that the probability that light fixture impact uses is substantially reduced, thus reach to increase the service life, reduce maintenance times and the effect of cost.Obtain the copper sheet on the both threads road of power supply in wiring board simultaneously and can reach maximum width, so that this product can concatenate multiple, saved wiring the end of a thread quantity in engineering construction, reduced construction cost.
Accompanying drawing explanation
Fig. 1 is the present embodiment circuit theory diagrams；
Fig. 2 is the SO-8 encapsulating structure figure of the CYT1000A chip of the present embodiment；
Fig. 3 is the TO252-2 encapsulating structure figure of the present embodiment；
Fig. 4 is the SOT89-3 encapsulating structure figure of the present embodiment.
Detailed description of the invention
As Figure 1-4, a kind of LED illumination circuit, including rectifier circuit, LED lamp bead group and linear constant current IC；
Described rectifier circuit, for will be converted into DC voltage after the ac voltage rectifier of alternating current power supply；
Described linear constant current IC, for being converted into the DC current of constant size by the DC voltage from described rectifier circuit；
Described LED lamp bead group is provided with several lamp bead string being in series mutually, and each described lamp bead string is provided with several LED lamp bead being in parallel mutually.
LED bead string mixing combination can realize damaging the effect of the normal work that a LEDs lamp bead does not affect remaining LED, light fixture only just can be made three LEDs of fixed bit continuous adjacent all damage when to lose luminous function, so that the probability that light fixture impact uses is substantially reduced, thus reach to increase the service life, reduce maintenance times and the effect of cost.Lamp bead quantity in described LED strip mixing circuit can adjust according to the not equal practical situation of lamp bead rated voltage, it is also possible to resistance or other elements replace the lamp bead of institute's vacancy to realize the increase and decrease of lamp bead quantity.
Also include sampling feedback resistance and buffering electric capacity, described LED lamp bead group, sampling feedback resistance and linear constant current IC are sequentially connected in series, described buffering electric capacity is provided with 2, one of them is connected in parallel on outside the sequential circuit of LED lamp bead group, sampling feedback resistance and linear constant current IC, and another is connected in parallel on outside linear constant current IC.
Described rectifier circuit is provided with diode D1, D2, D3 and D4, the negative pole of described diode D1 and the negative pole of diode D2 concatenate the pole as power supply circuits, the positive pole of described diode D3 and the positive pole of diode D4 concatenate another pole as power supply circuits, one end that the positive pole of described diode D1 and the negative pole concatenation of diode D3 input as alternating current power supply, the positive pole of described diode D2 and the negative pole concatenation of diode D4 are as the other end of alternating current power supply input.
Described linear constant current IC is that SO-8 encapsulates or TO252-2 encapsulates or SOT89-3 encapsulation.Described linear constant current IC uses CYT1000A chip or CYT1000AE chip or SM2082 chip.
TO252-2 wrapper contains OUT terminal, GND end, current sampling feedback end (REXT).Described chip utilizes current sampling end outer meeting resistance to arrange electric current for 5mA-60mA, and output electric current does not changes with chip OUT terminal mouth voltage.This IC is internally integrated temperature compensation function, will automatically reduce output electric current when chip internal junction temperature is more than 100 DEG C to reduce lamp interior temperature, thus extend LED lamp bead service life.
Described LED illumination circuit whole installation is on circuit boards, described diode D1 and diode D2 is positioned at one end of circuit board, described diode D3 and diode D4 is positioned at the other end of circuit board, the positive pole of described diode D1 is connected by copper sheet with the negative pole of diode D3, and the positive pole of described diode D2 is connected by copper sheet with the negative pole of diode D4.Described diode D1, D2, D3 and D4 are IN4007 type diode.
This structure makes the copper sheet on the both threads road of power supply in wiring board can reach maximum width, so that this product can concatenate 25-62 more than, has saved wiring the end of a thread quantity in engineering construction, has reduced construction cost.
In the circuit design of the present embodiment in addition to can using civil power (220V) power supply, the compatible cleverly circuit structure that low pressure (AC/DC24V) can be used to power.The present embodiment is 6 LEDs tandem, be 6 strings 3 also.When producing high voltage supply product lamp bead used be single 36V voltage, power be the special lamp bead of 0.3W-1W, coordinate integrated linear constant current IC and commutation diode can realize complete function.If produce into the product that low pressure (AC/DC24V) is powered, the lamp bead used is single 2.0V-3.8V voltage, power is the lamp bead of 0.05W-1W, high-voltage linear constant current IC will not be used in the product of this low-voltage power supply, 0R equivalent resistance wire jumper is used to make it skip IC part on circuit board structure, the most also need suitably to regulate the resistance concatenated in lamp bead to share in a loop namely six LEDs unaffordable unnecessary supply voltage, i.e. 24V-6*3.2V=4.8V, the voltage of the most about about 4.8V will be shared by gone here and there resistance in the middle of circuit, its resistance can be calculated by Ohm's law.
Described above is only to explanation of the present utility model, those of ordinary skill in the art's can completely is made to implement this programme, but it is not to restriction of the present utility model, the present embodiment can be made after reading this specification by those skilled in the art as required does not has the amendment of creative contribution, and these are all the most creative amendments.But as long as all being protected by Patent Law in right of the present utility model.
Claims (7)
1. a LED illumination circuit, it is characterised in that: include rectifier circuit, LED lamp bead group and linear constant current IC；
Described rectifier circuit, for will be converted into DC voltage after the ac voltage rectifier of alternating current power supply；
Described linear constant current IC, for being converted into the DC current of constant size by the DC voltage from described rectifier circuit；
Described LED lamp bead group is provided with several lamp bead string being in series mutually, and each described lamp bead string is provided with several LED lamp bead being in parallel mutually.
A kind of LED illumination circuit the most according to claim 1, it is characterized in that: also include sampling feedback resistance and buffering electric capacity, described LED lamp bead group, sampling feedback resistance and linear constant current IC are sequentially connected in series, described buffering electric capacity is provided with 2, one of them is connected in parallel on outside the sequential circuit of LED lamp bead group, sampling feedback resistance and linear constant current IC, and another is connected in parallel on outside linear constant current IC.
A kind of LED illumination circuit the most according to claim 1, it is characterized in that: described rectifier circuit is provided with diode D1, D2, D3 and D4, the negative pole of described diode D1 and the negative pole of diode D2 concatenate the pole as power supply circuits, the positive pole of described diode D3 and the positive pole of diode D4 concatenate another pole as power supply circuits, one end that the positive pole of described diode D1 and the negative pole concatenation of diode D3 input as alternating current power supply, the positive pole of described diode D2 and the negative pole concatenation of diode D4 are as the other end of alternating current power supply input.
A kind of LED illumination circuit the most according to claim 1, it is characterised in that: described linear constant current IC is that SO-8 encapsulates or TO252-2 encapsulates or SOT89-3 encapsulation.
A kind of LED illumination circuit the most according to claim 1, it is characterised in that: described linear constant current IC uses CYT1000A chip or CYT1000AE chip or SM2082 chip.
A kind of LED illumination circuit the most according to claim 3, it is characterized in that: described LED illumination circuit whole installation is on circuit boards, described diode D1 and diode D2 is positioned at one end of circuit board, described diode D3 and diode D4 is positioned at the other end of circuit board, the positive pole of described diode D1 is connected by copper sheet with the negative pole of diode D3, and the positive pole of described diode D2 is connected by copper sheet with the negative pole of diode D4.
A kind of LED illumination circuit the most according to claim 3, it is characterised in that: described diode D1, D2, D3 and D4 are rectification type diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620032425.5U CN205510462U (en) | 2016-01-13 | 2016-01-13 | LED lighting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620032425.5U CN205510462U (en) | 2016-01-13 | 2016-01-13 | LED lighting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205510462U true CN205510462U (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620032425.5U Active CN205510462U (en) | 2016-01-13 | 2016-01-13 | LED lighting circuit |
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| Country | Link |
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| CN (1) | CN205510462U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472818A (en) * | 2016-01-13 | 2016-04-06 | 黎时勇 | LED lighting circuit |
| CN108575005A (en) * | 2017-03-09 | 2018-09-25 | 郭尔峰 | A kind of LED light |
| CN109119524A (en) * | 2018-08-13 | 2019-01-01 | 广东晶科电子股份有限公司 | A kind of LED lamp bead marking device and marking method |
-
2016
- 2016-01-13 CN CN201620032425.5U patent/CN205510462U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472818A (en) * | 2016-01-13 | 2016-04-06 | 黎时勇 | LED lighting circuit |
| CN108575005A (en) * | 2017-03-09 | 2018-09-25 | 郭尔峰 | A kind of LED light |
| CN109119524A (en) * | 2018-08-13 | 2019-01-01 | 广东晶科电子股份有限公司 | A kind of LED lamp bead marking device and marking method |
| CN109119524B (en) * | 2018-08-13 | 2019-09-13 | 广东晶科电子股份有限公司 | A kind of LED lamp bead marking device and marking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180125 Address after: The new Mao Industrial Zone Qinglong road 528478 Guangdong city of Zhongshan province Henglan Town of the third floor of No. 5 Patentee after: Zhongshan Ju win Lighting Technology Co., Ltd. Address before: No. 026, pagazhen ruins, Huarong County, Yueyang, Hunan Patentee before: Li Shiyong |
|
| TR01 | Transfer of patent right |