CN205213091U - A novel starting circuit and LED lighting system for exchanging LED driver of adjusting luminance - Google Patents
A novel starting circuit and LED lighting system for exchanging LED driver of adjusting luminance Download PDFInfo
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- CN205213091U CN205213091U CN201620117843.4U CN201620117843U CN205213091U CN 205213091 U CN205213091 U CN 205213091U CN 201620117843 U CN201620117843 U CN 201620117843U CN 205213091 U CN205213091 U CN 205213091U
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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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Abstract
The utility model discloses a novel starting circuit and LED lighting system for exchanging LED driver of adjusting luminance, wherein, starting circuit includes first inductance L1, first electric capacity C1, second electric capacity C2, third electric capacity C3, third diode D3, fourth diode D4 and starts electric capacity cstart, first inductance L1 and first electric capacity C1's a termination bridge rectifier module's output, first electric capacity C1's other end ground connection, second electric capacity C2 and third electric capacity C3 establish ties, and second electric capacity C2 connects in first inductance L1's the other end third electric capacity C3's one end ground connection, third diode D3's positive pole is connected between second electric capacity C2 and third electric capacity C3, and the negative pole is connected with the one end that starts electric capacity cstart with control chip's VDD port, start electric capacity cstart's other end ground connection. The utility model discloses low -voltage component by low -cost high reliability constitutes, and when the stable state starting circuit consumed energy not, improved power efficiency.
Description
Technical field
The utility model belongs to LED field, especially a kind of interchange dimming LED driver.
Background technology
The topological structure of a lot of Switching Power Supply transmits part energy by an auxiliary winding of main switch transformer or inductance.But there is a bottleneck problem: namely circuit is only after abundant startup optimization, auxiliary winding could be relied on energy is provided, and need a start-up circuit when system electrification before this for control circuit provides an initial voltage.
The start-up circuit of existing interchange dimming LED driver is the high input voltage side being directly connected to control chip by a resistance Rstart from filtering back end DC high voltage nodes.Applicant finds after deliberation afterwards, and existing LED driver exists at least two shortcomings: one is that control chip inside needs to arrange the power circuit that a high pressure turns low pressure, cost and chip technology risk all higher; Two is that resistance Rstart can consume electric energy when system cloud gray model, increases heat.
Utility model content
Utility model object: provide a kind of and exchange dimming LED driver, to solve the problems referred to above that prior art exists.Further object is to provide a kind of LED illumination System.
Technical scheme: a kind of novel start-up circuit for exchanging dimming LED driver, comprise bridge rectifier module, auxiliary power module, control chip and start-up circuit module, described start-up circuit module comprises the first inductance L 1, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4 and start-up capacitance Cstart; The output of the one termination bridge rectifier module of described first inductance L 1 and the first electric capacity C1, the other end ground connection of described first electric capacity C1; Described second electric capacity C2 and the 3rd electric capacity C3 connects, and the second electric capacity C2 is connected to the other end of the first inductance L 1, one end ground connection of the 3rd electric capacity C3; The anode of described 3rd diode D3 is connected between the second electric capacity C2 and the 3rd electric capacity C3, and negative electrode is connected with the vdd terminal mouth of control chip and one end of start-up capacitance Cstart; The other end ground connection of start-up capacitance Cstart, the anode of described 4th diode D4 is connected with auxiliary power module, and negative electrode is connected with the vdd terminal mouth of control chip.
Preferably, described second electric capacity C2 is parallel with the first resistance R1, and described 3rd electric capacity C3 is parallel with the second resistance R2.
Preferably, described auxiliary power module comprises auxiliary winding and the second diode D2, the 3rd resistance R3 and the 4th electric capacity C4, anode, the negative electrode of the second diode D2 are connected with one end of auxiliary winding and the 3rd resistance R3 respectively, one end of described 4th electric capacity C4 is connected with the other end of the 3rd resistance R3, the other end ground connection of the 4th electric capacity C4.
A kind of LED illumination System, comprises above-mentioned arbitrary novel start-up circuit for exchanging dimming LED driver.
Beneficial effect: the utility model eliminates the high-voltage starting circuit of existing high cost, low reliability, and adjunct circuit is made up of low-voltage component; When stable state, start-up circuit is consumed energy not, improves power-efficient.The utility model can be used in various Off-line SMPS.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 a and Fig. 2 b is the start-up circuit oscillogram not having dimmer He have dimmer respectively.
Embodiment
Below describe structure of the present utility model, theory and design thinking in detail.
In order to solve prior art Problems existing, applicant carried out thoroughgoing and painstaking and creative analysis and research.Applicant finds: solid-state illumination driver develops from traditional Switching Power Supply.Common SCR light regulation device and incandescent lamp can cooperatings very well, and dimmer can trigger at any time and light, and only has when voltage zero-cross or electric current are lower than maintenance current value after conducting, just can nature shutoff.Based on this principle, the resistance characteristic of incandescent lamp can not affect the triggering and conducting of thyristor or the consistency of shutoff.But LED drive power is nonlinear switching type circuit, needs passive component composition damping screen, reach the target controlling stress suffered by electromagnetic interference and power source internal element.
Prior art solution of the above problems is stated in the introduction, at this, details are as follows: for shortcoming one, and internal high pressure change-over circuit uses the voltage semiconductor devices such as JFET (knot effect pipe) or LDMOS (limit diffused metal oxide field effect transistor) usually.Because constant current charge had both needed to control, need again the device of this high-pressure process to be integrated in chip, cost can significantly increase, and allows high-tension electricity and pressure common electricity be present in same chip in addition simultaneously, also reduces the operational reliability of control chip itself.
Based on above-mentioned analysis and research, applicant proposed following technical conceive: when extraneous AC high voltage access, by a kind of device and pass through mechanism, high-voltage alternating electric energy is converted to the low-voltage DC needed for control circuit, thus make control circuit start action, until transformer assists winding to stablize to control chip supply power.
Particularly, gather in a part of electric energy by power conversion circuit from input filter end and carry out the stable process of low pressure, thus to control chip supply energy, producing initial voltage.By the time system starts completely, and after auxiliary winding normal power supply, namely this part circuit no longer works, also just not consumed energy.
As shown in Figure 1, to adopt flyback topologies framework, this embodiment mainly comprises AC power, bridge rectifier module (rectifier bridge), auxiliary power module (auxiliary winding and related elements), control chip, comprises the start-up circuit module of damping filter structure, and voltage transformation module and load blocks.Wherein, start-up circuit module mainly comprises the first inductance L 1, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4 and start-up capacitance Cstart.Wherein, the output of a termination bridge rectifier module of the first inductance L 1 and the first electric capacity C1, the other end ground connection of the first electric capacity C1; Second electric capacity C2 and the 3rd electric capacity C3 connects, and the second electric capacity C2 is connected to the other end of the first inductance L 1, one end ground connection of the 3rd electric capacity C3.The anode of the 3rd diode D3 is connected between the second electric capacity C2 and the 3rd electric capacity C3, and negative electrode is connected with the vdd terminal mouth of control chip and one end of start-up capacitance Cstart; The other end ground connection of start-up capacitance Cstart.The anode of the 4th diode D4 is connected with auxiliary power module, and negative electrode is connected with the vdd terminal mouth of control chip.
Wherein, the first inductance L 1, first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3 are damping filtration module, have the effect of energy storage, voltage stabilizing and filtering.Start-up capacitance Cstart is used for providing voltage when starting to control chip.At former avris, be provided with diode, the anode of this diode is connected with former limit, and negative electrode is connected with electric capacity in parallel and resistance, and this electric capacity is connected with the rear end of the first inductance L 1 with the other end of resistance.This group electric capacity, resistance and the spike of diode Absorbable rod, protective circuit element.Between secondary and load, be provided with and the first diode D1 of load in series and the electric capacity Cout in parallel with load, be respectively used to rectification, and voltage stabilizing, rectification, filtering, improve output ripple.
In a preferred embodiment, the second electric capacity C2 is parallel with the first resistance R1, and described 3rd electric capacity C3 is parallel with the second resistance R2.
In a further embodiment, auxiliary power module comprises auxiliary winding and the second diode D2, the 3rd resistance R3 and the 4th electric capacity C4, anode, the negative electrode of the second diode are connected with one end of auxiliary winding and the 3rd resistance R3 respectively, one end of 4th electric capacity C4 is connected with the other end of the 3rd resistance R3, the other end ground connection of the 4th electric capacity C4.
When bidirectional thyristor triggering and conducting, the road output of rectifier diode bridge can produce a larger peak voltage and electric current.This peak voltage is made up of two parts energy: one is high-pressure side commutating voltage, and two is the energy exchanging dimmer internal passive component and outside (drive circuit) element generation resonance.Such peak voltage the short time contain great number energy by figure in electric capacity Cstart and rectification nip diode transmit the power port of sub-fraction energy to control chip.Just carve at system energization, vdd voltage Cstart is zero, by the conducting of dimmer cycle, to Cstart capacitor charging, the electric current that control chip consumes when starting not start completely is very little of tens UA levels, and therefore start-up circuit has enough time and charging ability to provide initial voltage needed for IC.Once IC normally works, namely auxiliary winding can provide enough energy to power to control chip, no longer relies on start-up circuit and touches the logical energy gathered in instantaneously at dimmer.
Specific works process prescription is as follows: extraneous energising, capacitance voltage starts to rise, and reach normal working voltage, driving chip starts control circuit by Circuit Fault on Secondary Transformer transferring energy, the power supply electric capacity starting driving chip thus from transformer power taking, and no longer will need start-up circuit.
It should be noted that, circuit of the present utility model is applicable to the framework of all interchange light modulating LED drivers and Switching Power Supply, pervasive in various topological circuit, comprises step-down, boosting, buck and flyback etc.
In a word, the utility model solves as control circuit part provides the problem starting initial voltage.The damping filter circuit that the utility model utilizes light modulating LED power supply intrinsic, increases corresponding voltage stabilizing circuit, thus reach stable, the function of efficient start system.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present utility model; can carry out multiple equivalents to the technical solution of the utility model, these equivalents all belong to protection range of the present utility model.
Claims (4)
1. one kind for exchanging the novel start-up circuit of dimming LED driver, comprise bridge rectifier module, auxiliary power module, control chip and start-up circuit module, it is characterized in that, described start-up circuit module comprises the first inductance L 1, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4 and start-up capacitance Cstart; The output of the one termination bridge rectifier module of described first inductance L 1 and the first electric capacity C1, the other end ground connection of described first electric capacity C1; Described second electric capacity C2 and the 3rd electric capacity C3 connects, and the second electric capacity C2 is connected to the other end of the first inductance L 1, one end ground connection of the 3rd electric capacity C3; The anode of described 3rd diode D3 is connected between the second electric capacity C2 and the 3rd electric capacity C3, and negative electrode is connected with the vdd terminal mouth of control chip and one end of start-up capacitance Cstart; The other end ground connection of start-up capacitance Cstart, the anode of described 4th diode D4 is connected with auxiliary power module, and negative electrode is connected with the vdd terminal mouth of control chip.
2. as claimed in claim 1 for exchanging the novel start-up circuit of dimming LED driver, it is characterized in that, described second electric capacity C2 is parallel with the first resistance R1, and described 3rd electric capacity C3 is parallel with the second resistance R2.
3. as claimed in claim 1 or 2 for exchanging the novel start-up circuit of dimming LED driver, it is characterized in that, described auxiliary power module comprises auxiliary winding and the second diode D2, the 3rd resistance R3 and the 4th electric capacity C4, anode, the negative electrode of the second diode D2 are connected with one end of auxiliary winding and the 3rd resistance R3 respectively, one end of described 4th electric capacity C4 is connected with the other end of the 3rd resistance R3, the other end ground connection of the 4th electric capacity C4.
4. a LED illumination System, is characterized in that, comprises the novel start-up circuit for exchanging dimming LED driver described in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620117843.4U CN205213091U (en) | 2016-02-05 | 2016-02-05 | A novel starting circuit and LED lighting system for exchanging LED driver of adjusting luminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620117843.4U CN205213091U (en) | 2016-02-05 | 2016-02-05 | A novel starting circuit and LED lighting system for exchanging LED driver of adjusting luminance |
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| Publication Number | Publication Date |
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| CN205213091U true CN205213091U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620117843.4U Withdrawn - After Issue CN205213091U (en) | 2016-02-05 | 2016-02-05 | A novel starting circuit and LED lighting system for exchanging LED driver of adjusting luminance |
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| CN (1) | CN205213091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657896A (en) * | 2016-02-05 | 2016-06-08 | 江苏力行电力电子科技有限公司 | Alternating-current dimming LED drive device with novel starting circuit and LED illuminating system |
-
2016
- 2016-02-05 CN CN201620117843.4U patent/CN205213091U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657896A (en) * | 2016-02-05 | 2016-06-08 | 江苏力行电力电子科技有限公司 | Alternating-current dimming LED drive device with novel starting circuit and LED illuminating system |
| CN105657896B (en) * | 2016-02-05 | 2017-03-29 | 江苏力行电力电子科技有限公司 | Exchange dimming LED driver with new start-up circuit and LED illumination System |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160504 Effective date of abandoning: 20170329 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160504 Effective date of abandoning: 20170329 |