CN102281666A - Constant current source - Google Patents
Constant current source Download PDFInfo
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- CN102281666A CN102281666A CN2011100454994A CN201110045499A CN102281666A CN 102281666 A CN102281666 A CN 102281666A CN 2011100454994 A CN2011100454994 A CN 2011100454994A CN 201110045499 A CN201110045499 A CN 201110045499A CN 102281666 A CN102281666 A CN 102281666A
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- led
- chip
- constant current
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- capacitor
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Abstract
Disclosed is a constant current source. The anode of the DC power supply is grounded, the cathode is connected to one end of an LED tube and one end of a resistor R1, the other end of the resistor R1 is connected to one end of a voltage stabilizing tube ID1, one end of a capacitor C1 and the control electrode of a chip 2N60C, the emitter electrode of the chip 2N60C is connected to one end of the resistor R2, the collector electrode of the chip 2N60C is connected to the other end of the LED tube, the other end of the voltage stabilizing tube ID1, the other end of the capacitor C1 and the other end of the capacitor C1, and the other end of the resistor R2 is grounded. The low-cost LED constant current power source only has five devices, has the advantages of simple circuit, reliability, no harmonic radiation and low cost, and is capable of providing stable and reliable current. By utilizing the low-cost LED constant current source, the advantages of high efficiency and long service life of an LED element are fully exerted. The constant current source may be used in medium and low power LED lighting appliances.
Description
Technical field
The invention belongs to the LED power supply, particularly a kind of constant-current supply.
Background technology
One of key of White-light LED illumination technology is the driving power of LED, and its major function provides stable, reliably electric current.The driving power of present existing LED is to adopt numerous multiple components and parts, and the cost height is unfavorable for promoting the use of.
Summary of the invention
Technical problem to be solved by this invention is: a kind of constant-current supply is provided.
Technical scheme of the present invention is:
A kind of constant-current supply, it is characterized in that: be the LED constant-current supply that adopts five elements to form: the positive terminal ground connection of DC power supply, the negative pole end of power supply connects LED and manages an end and resistance R 1 one ends, resistance R 1 other end connection voltage-stabiliser tube ID1 one end, capacitor C 1 one ends, chip 2N60C control the utmost point, chip 2N60C emitter connects resistance R 2 one ends, chip 2N60C collector electrode connects the LED pipe other end, the voltage-stabiliser tube ID1 other end, capacitor C 1 other end and resistance R 2 other end ground connection.
DC power supply can be the direct current that obtains through bridge rectifier by exchanging.
Effect of the present invention is:
This low-cost LED constant-current supply is only with the low-cost constant-current supply of five former devices, and it is simple to have a circuit, reliably, does not have harmonic radiation, advantage with low cost.It is a low-cost constant-current source with the electric current that provides reliable and stable.It can give full play to the efficient of LED element, the advantage of longevity to use the low-cost LED constant-current source of written or printed documents.Can be applied among the middle low power LED electric lighting.
Description of drawings
Fig. 1 is the structure principle chart of low-cost LED constant-current supply
Fig. 2 is the 10W instance graph of low-cost LED constant-current supply
Fig. 3 is the 3.5W instance graph of low-cost LED constant-current supply
Embodiment
A kind of low-cost LED constant-current supply as shown in Figure 1, be the LED constant-current source that adopts five elements to form: the positive terminal ground connection of DC power supply, the negative pole end of power supply connects LED and manages an end and resistance R 1 one ends, resistance R 1 other end connection voltage-stabiliser tube ID1 one end, capacitor C 1 one ends, chip 2N60C control the utmost point, chip 2N60C emitter connects resistance R 2 one ends, chip 2N60C collector electrode connects the LED pipe other end, the voltage-stabiliser tube ID1 other end, capacitor C 1 other end and resistance R 2 other end ground connection.
DC power supply can be the direct current that obtains through bridge rectifier by exchanging.
Circuit description among Fig. 1:
By R1, ID1, C1 forms the diode voltage stabilizing circuit.Constant voltage is provided for the grid of Q1.Q1 is N channel high power field effect transistor 2N60C, the resistance that connects over the ground at its source electrode.After R2 numerical value is fixed, under the effect of its grid constant voltage, define the maximum current that flows through the LED matrix, suitably the structure of assembly LED matrix just can be clutched the current value of LED when supply voltage raises, make the LED life-saving to reach, prevent the drawback of early stage light decay.
Instantiation: Fig. 2, Fig. 3 are the 10W example of low-cost LED constant-current supply and the 3.5W example of low-cost LED constant-current supply.
Claims (2)
1. constant-current supply, it is characterized in that: be the LED constant-current supply that adopts five elements to form: the positive terminal ground connection of DC power supply, the negative pole end of power supply connects LED and manages an end and resistance R 1 one ends, resistance R 1 other end connection voltage-stabiliser tube ID1 one end, capacitor C 1 one ends, chip 2N60C control the utmost point, chip 2N60C emitter connects resistance R 2 one ends, chip 2N60C collector electrode connects the LED pipe other end, the voltage-stabiliser tube ID1 other end, capacitor C 1 other end and resistance R 2 other end ground connection.
2. constant-current supply according to claim 1 is characterized in that: DC power supply is the direct current that obtains through bridge rectifier by exchanging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100454994A CN102281666A (en) | 2011-02-25 | 2011-02-25 | Constant current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100454994A CN102281666A (en) | 2011-02-25 | 2011-02-25 | Constant current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102281666A true CN102281666A (en) | 2011-12-14 |
Family
ID=45106759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100454994A Pending CN102281666A (en) | 2011-02-25 | 2011-02-25 | Constant current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102281666A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005259565A (en) * | 2004-03-12 | 2005-09-22 | Matsushita Electric Ind Co Ltd | Led driving circuit |
| CN201114897Y (en) * | 2007-07-24 | 2008-09-10 | 王元成 | A LED current-constant driving circuit |
| CN101646280A (en) * | 2008-08-05 | 2010-02-10 | 马善学 | LED high-voltage energy-saving power supply |
-
2011
- 2011-02-25 CN CN2011100454994A patent/CN102281666A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005259565A (en) * | 2004-03-12 | 2005-09-22 | Matsushita Electric Ind Co Ltd | Led driving circuit |
| CN201114897Y (en) * | 2007-07-24 | 2008-09-10 | 王元成 | A LED current-constant driving circuit |
| CN101646280A (en) * | 2008-08-05 | 2010-02-10 | 马善学 | LED high-voltage energy-saving power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111214 |