CN104093241A - Led constant current driver - Google Patents
Led constant current driver Download PDFInfo
- Publication number
- CN104093241A CN104093241A CN201410306513.5A CN201410306513A CN104093241A CN 104093241 A CN104093241 A CN 104093241A CN 201410306513 A CN201410306513 A CN 201410306513A CN 104093241 A CN104093241 A CN 104093241A
- Authority
- CN
- China
- Prior art keywords
- circuit
- control circuit
- led constant
- wave filtering
- drive
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED constant current driver. The LED constant current driver comprises a drive IC, a rectification filter circuit, a load circuit and a control circuit, the input end of the drive IC is provided with a ceramic capacitor, the input end of the rectification filter circuit receives electric signals input by the drive IC, one end of the control circuit is connected with the rectification filter circuit, the other end of the control circuit is connected with the load circuit, and the control circuit controls the current output to the load circuit from the rectification filter circuit according to detection on loads. The LED constant current driver has the advantages of being simple in structure, low in cost and high in reliability, and fewer elements are needed.
Description
Technical field
The present invention relates to LED driver, specifically LED constant-flow driver.
Background technology
LED has that volume is little, low cost and other advantages, so people's input for some systems by LED usually, and by LED lamp, whether lights to judge in system, whether signal is connected when system testing.As a semiconductor device that is operated in low-voltage, direct current, LED need work under constant electric current environment.Conventional mains-supplied during general system power supply, if need LED luminous when system detects, needs, by drive circuit, alternating voltage is carried out to rectification and controls afterwards for LED.Electrology characteristic from LED, the mean forward current of LED is along with the increase of forward voltage presents significantly linear growth, the change of LED its forward voltage after forward conduction is given birth to very large variation by causing that LED powers on to miscarry, and electric current is very large on the impact of LED junction temperature, excessive electric current is easy to cause LED to damage because junction temperature raises.For fear of LED, damage and the accuracy of impact test the defect such as existing LED constant-flow driver exists complex structure, components and parts are many, cost is high and reliability is low.
Summary of the invention
The object of the invention is to overcome the defect of prior art, a kind of simple in structure, components and parts are few, cost is low and reliability is high LED constant-flow driver is provided.
The technical solution adopted in the present invention is: LED constant-flow driver, described driver comprises drive IC, current rectifying and wave filtering circuit, load circuit, control circuit, described drive IC input arranges a ceramic capacitor, the input of described current rectifying and wave filtering circuit receives the signal of telecommunication of described drive IC input, described control circuit one end connects current rectifying and wave filtering circuit, the other end connects load circuit, and described control circuit is according to the detection of load is controlled to the electric current that described current rectifying and wave filtering circuit outputs to load circuit.
Further, described current rectifying and wave filtering circuit comprises the bridge rectifier that rectifier diode D1, D2, D3, D4 form.
Further, described control circuit comprises voltage stabilizing chip LM317 and R1, and described voltage stabilizing chip LM317 and R1 are connected in parallel.
The invention has the beneficial effects as follows, that LED constant-flow driver disclosed by the invention has advantages of is simple in structure, components and parts are few, cost is low and reliability is high.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with drawings and Examples, the present invention is further detailed explanation.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, LED constant-flow driver, described driver comprises drive IC 1, current rectifying and wave filtering circuit 2, load circuit 3, control circuit 4, described drive IC 1 input arranges a ceramic capacitor, the input of described current rectifying and wave filtering circuit 2 receives the signal of telecommunication of described drive IC 1 input, described control circuit 4 one end connect current rectifying and wave filtering circuit 2, and the other end connects load circuit 3, and described control circuit 4 is according to the detection of load is controlled to the electric current that described current rectifying and wave filtering circuit 2 outputs to load circuit 3.
Further, described current rectifying and wave filtering circuit comprises the bridge rectifier that rectifier diode D1, D2, D3, D4 form.
Further, described control circuit comprises voltage stabilizing chip LM317 and R1, and described voltage stabilizing chip LM317 and R1 are connected in parallel.
Specific embodiments of the invention are, the output access constant-flow driver input of power supply, and through C1 ceramic capacitor,
Offering drive IC uses as power supply, drive IC output connects current rectifying and wave filtering circuit input, output dc voltage after bridge rectifier rectification, through control circuit voltage stabilizing chip LM317 and R1, to outputing to the current detecting of load, control, LM317 is adjustable 3 proper Voltagre regulators, when 1.2 volts to 37 volts of output voltage ranges, can provide the electric currents that surpass 1.5 peaces, decompression capacitor R2 and control circuit form capacitance-resistance voltage reduction circuit, by resistance-capacitance depressurization, control, can tackle the output occasion of low-voltage.
That LED constant-flow driver disclosed by the invention has advantages of is simple in structure, components and parts are few, cost is low and reliability is high
Be noted that, the above embodiment is to the explanation of technical solution of the present invention and unrestricted, other modifications that are equal to replacement or make according to prior art of affiliated technical field those of ordinary skill, as long as do not exceed thinking and the scope of technical solution of the present invention, within all should being included in interest field of the presently claimed invention.
Claims (3)
1.LED constant-flow driver, described driver comprises drive IC, current rectifying and wave filtering circuit, load circuit, control circuit, it is characterized in that: described drive IC input arranges a ceramic capacitor, the input of described current rectifying and wave filtering circuit receives the signal of telecommunication of described drive IC input, described control circuit one end connects current rectifying and wave filtering circuit, the other end connects load circuit, and described control circuit is according to the detection of load is controlled to the electric current that described current rectifying and wave filtering circuit outputs to load circuit.
2. LED constant-flow driver according to claim 1, is characterized in that: described current rectifying and wave filtering circuit comprises the bridge rectifier that rectifier diode D1, D2, D3, D4 form.
3. LED constant-flow driver according to claim 1, is characterized in that: described control circuit comprises voltage stabilizing chip LM317 and R1, and described voltage stabilizing chip LM317 and R1 are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306513.5A CN104093241A (en) | 2014-06-30 | 2014-06-30 | Led constant current driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306513.5A CN104093241A (en) | 2014-06-30 | 2014-06-30 | Led constant current driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104093241A true CN104093241A (en) | 2014-10-08 |
Family
ID=51640904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410306513.5A Pending CN104093241A (en) | 2014-06-30 | 2014-06-30 | Led constant current driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104093241A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159088A (en) * | 2007-11-01 | 2008-04-09 | 厦门元谷信息科技有限公司 | Road lamp landscape lamp remote monitoring apparatus |
| CN101404840A (en) * | 2008-11-04 | 2009-04-08 | 梁莉丽 | Two-wire system light-adjustable LED controller |
| CN101420802A (en) * | 2008-12-02 | 2009-04-29 | 深圳市亮百佳电子科技有限公司 | The LED constant-current source that is used for the AC controllable silicon light modulation mode of illuminator |
| US20100264827A1 (en) * | 2009-04-18 | 2010-10-21 | Huang Guo-Jhong | Control Device of Cup Lamp |
| CN101959348A (en) * | 2010-09-30 | 2011-01-26 | 海洋王照明科技股份有限公司 | LED stepless dimming drive circuit and LED lamp |
| CN101977473A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Indoor light-emitting diode (LED) constant current illuminating lamp |
| CN102413599A (en) * | 2010-09-20 | 2012-04-11 | 海洋王照明科技股份有限公司 | LED (light-emitting diode) constant-current driving circuit and LED lamp |
| CN202385340U (en) * | 2011-11-28 | 2012-08-15 | 常州市巨泰电子有限公司 | LED constant-current linear power supply |
-
2014
- 2014-06-30 CN CN201410306513.5A patent/CN104093241A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159088A (en) * | 2007-11-01 | 2008-04-09 | 厦门元谷信息科技有限公司 | Road lamp landscape lamp remote monitoring apparatus |
| CN101404840A (en) * | 2008-11-04 | 2009-04-08 | 梁莉丽 | Two-wire system light-adjustable LED controller |
| CN101420802A (en) * | 2008-12-02 | 2009-04-29 | 深圳市亮百佳电子科技有限公司 | The LED constant-current source that is used for the AC controllable silicon light modulation mode of illuminator |
| US20100264827A1 (en) * | 2009-04-18 | 2010-10-21 | Huang Guo-Jhong | Control Device of Cup Lamp |
| CN102413599A (en) * | 2010-09-20 | 2012-04-11 | 海洋王照明科技股份有限公司 | LED (light-emitting diode) constant-current driving circuit and LED lamp |
| CN101959348A (en) * | 2010-09-30 | 2011-01-26 | 海洋王照明科技股份有限公司 | LED stepless dimming drive circuit and LED lamp |
| CN101977473A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Indoor light-emitting diode (LED) constant current illuminating lamp |
| CN202385340U (en) * | 2011-11-28 | 2012-08-15 | 常州市巨泰电子有限公司 | LED constant-current linear power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9654020B2 (en) | Smart matching step-down circuits and travel-use power conversion devices | |
| EP2398298A2 (en) | Power supply for an airfield LED sign | |
| EP3160025B1 (en) | Voltage set-up automatic matching circuits | |
| US8575862B2 (en) | Power supply for airfield lighting | |
| JP5812292B2 (en) | Beacon lights and beacon systems | |
| CN105718012A (en) | Method and circuit for automatically switching Vbus voltage in master/slave mode of OTG device | |
| CN103687163A (en) | Light emitting diode driving device and operation method thereof | |
| CN103533719A (en) | Triode-based light-emitting diode (LED) current ripple elimination driving circuit | |
| EP2782420A1 (en) | Series load control apparatus and marker light apparatus | |
| CN104093241A (en) | Led constant current driver | |
| CN108012380B (en) | Linear wide-voltage constant-current constant-power circuit and LED lamp with same | |
| EP3024131A1 (en) | 24-240 volt input voltage flyback switch mode power supply | |
| CN105578670A (en) | Energy saving device for LED | |
| CN104218534A (en) | DC-DC switching type circuit with no-load protection and lamp | |
| CN103354422A (en) | Converting circuit for converting constant current source to constant voltage source | |
| CN202475859U (en) | Current measuring controller for LED light fixture | |
| EP3007521A3 (en) | Driving circuit with dimming controller for driving light sources | |
| CN202475858U (en) | Current measurement frequency measurement controller for LED light fixture | |
| CN203951381U (en) | Vehicle-mounted inversion system | |
| US8901856B2 (en) | Detection circuit, power circuit, and luminaire | |
| US11784579B2 (en) | Devices, systems, and methods for power supplies | |
| EP3890446A1 (en) | Led driving circuit | |
| CN202475860U (en) | Frequency measurement controller for LED light fixture | |
| CN208657135U (en) | A kind of LED illumination System | |
| CN105870779A (en) | Laser driving circuit achieved in PWM constant-current mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141008 |
|
| RJ01 | Rejection of invention patent application after publication |