CN201528447U - LED driving power supply circuit - Google Patents
LED driving power supply circuit Download PDFInfo
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- CN201528447U CN201528447U CN2009203149169U CN200920314916U CN201528447U CN 201528447 U CN201528447 U CN 201528447U CN 2009203149169 U CN2009203149169 U CN 2009203149169U CN 200920314916 U CN200920314916 U CN 200920314916U CN 201528447 U CN201528447 U CN 201528447U
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Abstract
The utility model relates to an LED driving power supply circuit which comprises a driving circuit, a voltage transformation rectifying circuit, a switch power supply circuit, a feedback circuit and a luminous circuit, wherein the driving circuit is connected with the voltage transformation rectifying circuit which is connected with the luminous circuit; the switch power supply circuit is connected with the voltage transformation rectifying circuit; the feedback circuit is connected with the voltage transformation rectifying circuit and the switch power supply circuit; the driving circuit is used for providing a maintenance current; the voltage transformation rectifying circuit is used for inputting mains supply into rectifying and voltage transformation circuit and then outputting into the luminous circuit for providing a working current for the luminous circuit; the switch power supply circuit is used for controlling the voltage transformation rectifying circuit to convert high voltage electricity into low voltage electricity; and the feedback circuit is used for feeding a working voltage back into the switch power supply circuit from the voltage transformation rectifying circuit. The LED driving power supply circuit has the benefits that the maintenance current can be effectively provided for a light modulator, and current impact on a filter capacitor can be improved when the light modulator is used for adjusting the light.
Description
Technical field
The utility model belongs to electronic technology field, relates to a kind of power circuit, a kind of specifically illuminating LED driving power circuit.
Background technology
LED illumination is energy-efficient with it, environment friendly and pollution-free, good visual effect, long plurality of advantages of life-span are progressively replacing most traditional lighting mode, becomes the main flow of lighting technology development.General LED light fixture all is that a lot of LED lamp pearls are concentrated in together, and makes the style close with conventional lamp, as LED fluorescent lamp, LED ceiling light, LED shot-light and so on.Yet, also exist many problems to hinder the popularization and application of LED illumination in the technical field of LED illumination.
The light adjusting circuit of conventional lamp such as incandescent lamp, Halogen lamp LED is controllable silicon light modulation of series connection before its power line.When the controllable silicon light modulation circuit application of conventional lamp in the LED illuminator because existing LED illuminator adopts the alternating-current switch power supply that constant-current driving is provided usually, there are some following shortcomings in its drive circuit.The LED illuminating circuit generally is that low-voltage direct drives, and the switching power circuit that needs a high-voltage alternating to change low-voltage direct drives.And the switching power circuit input generally is provided with high-pressure electrolysis electric capacity and is used for filtering, makes the LED driving power circuit be rendered as capacitive load, and promptly being input as at civil power sinusoidal wavely just has electric current to flow through during near peak value, and all the other times do not have electric current.Common dimmer generally needs one and keeps electric current, and therefore for the LED driving power of capacitive load, dimmer can't operate as normal because of not guaranteeing to keep electric current.
The utility model content
The technical problem that the utility model solves provides a kind of LED driving power circuit that can make the dimmer operate as normal.
A kind of LED driving power circuit, comprise one drive circuit, one transformation rectification circuit, one switching power circuit, one feedback circuit and an illuminating circuit, this drive circuit connects this transformation rectification circuit, this drive circuit connects this transformation rectification circuit, this transformation rectification circuit connects this illuminating circuit, this switching power circuit connects this transformation rectification circuit, this feedback circuit connects this transformation rectification circuit and connects this switching power circuit, this drive circuit is used to this dimmer to provide and keeps electric current, this transformation rectification circuit is used for and will outputs to this illuminating circuit after the civil power input rectifying transformation to provide operating current to this illuminating circuit, this switching power circuit is used to control this transformer rectifier circuit and realizes that high-tension electricity converts low tension to, and this feedback circuit is used for feeding back an operating voltage from this transformation rectification circuit and gives this switching circuit.
Compared to prior art, the utility model LED driving power circuit 1 comprises this drive circuit, and this drive circuit comprises this inductance, this first continued flow resistance and this second continued flow resistance, can effectively keep electric current for this dimmer provides.And in the time of can improving this dimmer for light control to the rush of current of this filter capacitor.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model LED driving power circuit one better embodiment.
Embodiment
Below in conjunction with Figure of description the utility model execution mode is specified.
Seeing also Fig. 1, is the electrical block diagram of the utility model LED driving power circuit one better embodiment.This LED driving power circuit 1 comprises a dimmer 10, one drive circuit 20, a transformation rectification circuit 30, a switching power circuit 40, a feedback circuit 50 and an illuminating circuit 60.This dimmer 10 connects this drive circuit 20.This drive circuit 20 connects this transformation rectification circuit 30.This drive circuit 20 connects this transformation rectification circuit 40.This transformation rectification circuit 40 connects this illuminating circuit 60.This switching power circuit 40 connects this transformation rectification circuit 30.This feedback circuit 50 connects this transformation rectification circuit 30 and connects this switching power circuit 40.This dimmer 10 is used to regulate the voltage that is input to this drive circuit 20, this drive circuit 20 is used to this dimmer 10 to provide and keeps electric current, this transformation rectification circuit 30 is used for and will outputs to this illuminating circuit 60 after the civil power input rectifying transformation, is used to this illuminating circuit 60 that operating current is provided.This switching power circuit 40 is used to control this transformer rectifier circuit 30 and realizes that high-tension electricity converts low tension to.This feedback circuit 50 is used for giving this switching circuit 50 from this transformation rectification circuit 30 feedbacks one operating voltage.
This dimmer 10 comprises a dimming resistor Rd1, a controllable silicon Qd1 and a dimming capacitors Cd1.This dimming resistor Rd1 and this dimming capacitors Cd1 series connection, this dimming resistor Rd1 is also connected to civil power L end, and this dimming capacitors Rd1 is connected to this drive circuit 20.The control end of this controllable silicon Qd1 is connected a node between this dimming resistor Rd1 and this dimming capacitors Cd1, and its input connects civil power L end, and output connects this drive circuit 20.
This drive circuit 20 comprises an inductance L 1, one first resistance R 1, one second resistance R 2, one first rectifier bridge BD1, and this first rectifier bridge BD1 comprises 4 end to end diodes.This dimmer 10 is by the input A of this inductance L 1 this first rectifier bridge of connection BD1, and civil power N end connects another input B of this inductance L 1.The output C of this first rectifier bridge BD1 is connected to the base stage of this triode Q1 via this resistance R 1, its output D ground connection, and output C is also connected to the collector electrode of this triode Q1 simultaneously.This Schottky diode ZD1 is connected between the base stage and ground of this triode Q1.This second resistance R 2 is connected between the emitter and ground of this triode Q1.
This transformation rectification circuit 30 comprises one second rectifier bridge DB2, one first coil L11, one second coil L22, a rectifier diode D1, one first filter capacitor C1 and one second filter capacitor C3.This first coil L1 one end connects the output of this second rectifier bridge BD2, and the other end connects this switching power circuit 40.This first filter capacitor C1 is connected between two outputs of this second rectifier bridge BD2.Two inputs of this second rectifier bridge BD2 connect two inputs that connect this first rectifier bridge BD1 respectively.This second coil L22 one end is successively via positive pole and the minus earth of the positive pole of this rectifier diode D1 and negative pole, this filter capacitor C3, its other end ground connection.This rectifier diode D1 and this second filter capacitor C3 are used to the voltage commutation filtering that is input to this illuminating circuit 60.
This switching power circuit 40 comprises a pulse-width modulation circuit U1 and a switching tube Q2.The grid of this switching tube Q2 is connected to the control end of this pulse-width modulation circuit U1, and source electrode is connected to the collector electrode of this buffering triode, and drain electrode is connected to this first coil L1.This pulse-width modulation circuit U1 also connects this feedback circuit 60.
This feedback circuit 60 comprises an optical coupler U2 and a feedback resistance R3, Schottky diode D2, the positive pole of this optical coupler U2 is connected to the negative pole of this rectifier diode D1 via this Schottky diode D2, and connect the power end of this pulse-width modulation circuit U1, be used to it that operating voltage is provided.This illuminating circuit 60 comprises at least one light-emitting diode D3, and the one end connects ground connection, and the other end connects the negative pole of this rectifier diode D1.
When this LED driving power circuit operate as normal, this inductance L 1, this first resistance R 1 and this second resistance R 2 are kept this dimmer 10 and are remained one and keep electric current, thus these dimmer 10 operate as normal.This switching tube Q2 constantly switches between conducting state and closed condition, thereby this transformer rectifier circuit 30 produces the operating current that is provided to this optical circuit 60 of haircuting.The switching frequency of this switching tube Q2 is controlled by this pulse-width modulation circuit U1.In addition, the utility model LED driving power circuit 1 goes for the common various dimmers in market, and dimming behavior can reach the effect of incandescent lamp.This first rectifier bridge DB1, this first resistance R 1, this triode Q1, this second resistance R 2 and this Schottky diode ZD1 constitute constant-current source circuit, this triode Q1 maintains the conducting electric current and flows through, thereby, guarantee this dimmer 10 operate as normal as the electric current of keeping of this dimmer 10.
Compared to prior art, the utility model LED driving power circuit 1 comprises this drive circuit 20, and this drive circuit 20 comprises this inductance L 1, this first resistance R 1 and this second resistance R 2, can effectively keep electric current for this dimmer 10 provides.And in the time of can improving these dimmer 10 light modulations to the rush of current of this filter capacitor C1.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (7)
1. LED driving power circuit, it is characterized in that: comprise one drive circuit, one transformation rectification circuit, one switching power circuit, one feedback circuit and an illuminating circuit, this drive circuit connects this transformation rectification circuit, this drive circuit connects this transformation rectification circuit, this transformation rectification circuit connects this illuminating circuit, this switching power circuit connects this transformation rectification circuit, this feedback circuit connects this transformation rectification circuit and connects this switching power circuit, this drive circuit is used to provide keeps electric current, this transformation rectification circuit is used for and will outputs to this illuminating circuit after the civil power input rectifying transformation to provide operating current to this illuminating circuit, this switching power circuit is used to control this transformer rectifier circuit and realizes that high-tension electricity converts low tension to, and this feedback circuit is used for feeding back an operating voltage from this transformation rectification circuit and gives this switching circuit.
2. LED driving power circuit as claimed in claim 1, it is characterized in that: comprise that also one is used to regulate the dimmer of the voltage that is input to this drive circuit, this dimmer comprises one first dimming resistor, one controllable silicon and one first dimming capacitors, this first dimming resistor and the series connection of this first dimming capacitors, this first dimming resistor is also connected to the civil power zero line side, this first dimming capacitors is connected to this bridge rectifier, this silicon controlled control end is connected a node between this first dimming resistor and this first dimming capacitors, its input connects civil power live wire end, output connects this drive circuit, and this drive circuit is kept electric current for this dimmer provides.
3. as LED driving power circuit as described in the claim 2, it is characterized in that: this drive circuit comprises an inductance, one first resistance, one second resistance, one first rectifier bridge, this first rectifier bridge comprises four end to end diodes, this dimmer connects an input of this first rectifier bridge by this inductance, the civil power zero line side connects another input of this inductance, one output of this first rectifier bridge is connected to the base stage of this triode via this resistance and is connected to the collector electrode of this triode, another of this first rectifier bridge goes out to hold ground connection, this Schottky diode is connected between the base stage and ground of this triode, and this second resistance is connected between the emitter and ground of this triode.
4. LED driving power circuit as claimed in claim 3, it is characterized in that: this transformation rectification circuit comprises one second rectifier bridge, one first coil, one second coil, one rectifier diode, one first filter capacitor and one second filter capacitor, this first coil, one end connects an output of this second rectifier bridge, the other end connects this switching power circuit, this first filter capacitor is connected between two outputs of this second rectifier bridge, two inputs of this second rectifier bridge connect two inputs that connect this first rectifier bridge respectively, this second coil, one end is successively via the positive pole and the negative pole of this rectifier diode, the positive pole of this filter capacitor and minus earth, its other end ground connection, this rectifier diode and this second filter capacitor are used to the voltage commutation filtering that is input to this illuminating circuit.
5. LED driving power circuit as claimed in claim 4, it is characterized in that: this switching power circuit comprises a pulse-width modulation circuit and a switching tube, the grid of this switching tube is connected to a control end of this pulse-width modulation circuit, source electrode is connected to the collector electrode of this buffering triode, drain electrode is connected to this first coil, and this pulse-width modulation circuit also connects this feedback circuit.
6. LED driving power circuit as claimed in claim 5, it is characterized in that: this feedback circuit comprises an optical coupler and a feedback resistance, Schottky diode, the positive pole of this optical coupler is connected to the negative pole of this rectifier diode via this Schottky diode, and connect the power end of this pulse-width modulation circuit, be used to it that operating voltage is provided.
7. LED driving power circuit as claimed in claim 6 is characterized in that: this illuminating circuit comprises at least one light-emitting diode, and the one end connects ground connection, and the other end connects the negative pole of this rectifier diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203149169U CN201528447U (en) | 2009-11-17 | 2009-11-17 | LED driving power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203149169U CN201528447U (en) | 2009-11-17 | 2009-11-17 | LED driving power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201528447U true CN201528447U (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203149169U Expired - Fee Related CN201528447U (en) | 2009-11-17 | 2009-11-17 | LED driving power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201528447U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369764A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | A LED driving circuit and a LED lamp |
| TWI428057B (en) * | 2010-09-16 | 2014-02-21 | 安恩國際公司 | Light-emitting driving circuit with function of dynamic loading and increasing power factor and related dynamic loading module |
| CN103856078A (en) * | 2014-03-04 | 2014-06-11 | 江苏达伦电子股份有限公司 | Novel intelligent LED ceiling lamp and power-switching circuit system thereof |
| CN107466134A (en) * | 2017-08-28 | 2017-12-12 | 盐城莱廷绍工业技术有限公司 | It is a kind of to dim the LED drive circuit to go out |
| CN109195262A (en) * | 2018-10-08 | 2019-01-11 | 深圳市中州远光照明科技有限公司 | A kind of LED drive power of feedback control |
-
2009
- 2009-11-17 CN CN2009203149169U patent/CN201528447U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI428057B (en) * | 2010-09-16 | 2014-02-21 | 安恩國際公司 | Light-emitting driving circuit with function of dynamic loading and increasing power factor and related dynamic loading module |
| CN103369764A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | A LED driving circuit and a LED lamp |
| CN103369764B (en) * | 2012-03-30 | 2017-02-08 | 海洋王照明科技股份有限公司 | A LED driving circuit and a LED lamp |
| CN103856078A (en) * | 2014-03-04 | 2014-06-11 | 江苏达伦电子股份有限公司 | Novel intelligent LED ceiling lamp and power-switching circuit system thereof |
| CN107466134A (en) * | 2017-08-28 | 2017-12-12 | 盐城莱廷绍工业技术有限公司 | It is a kind of to dim the LED drive circuit to go out |
| CN109195262A (en) * | 2018-10-08 | 2019-01-11 | 深圳市中州远光照明科技有限公司 | A kind of LED drive power of feedback control |
| CN109195262B (en) * | 2018-10-08 | 2020-04-07 | 深圳市中州远光照明科技有限公司 | Feedback control's LED drive power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20161117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |