CN203827558U - LED-lamp power-supply device compatible with electronic ballast - Google Patents
LED-lamp power-supply device compatible with electronic ballast Download PDFInfo
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- CN203827558U CN203827558U CN201420086896.5U CN201420086896U CN203827558U CN 203827558 U CN203827558 U CN 203827558U CN 201420086896 U CN201420086896 U CN 201420086896U CN 203827558 U CN203827558 U CN 203827558U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model belongs to the technical field of LED-lamp drive circuits and provides an LED-lamp power-supply device compatible with an electronic ballast. The LED-lamp power-supply device includes the electronic ballast, a rectifying and filtering circuit, a high-voltage absorption circuit, a power factor circuit and a step-down constant-current circuit. An input end of the electronic ballast is connected with an AC power supply. An output end of the electronic ballast is connected with an input end of the rectifying and filtering circuit. An output end of the rectifying and filtering circuit is connected with an input end of the high-voltage absorption circuit. An output end of the high-voltage absorption circuit is connected with an input end of the power factor circuit. An output end of the power factor circuit is connected with an input end of the step-down constant-current circuit. An output end of the step-down constant-current circuit is connected with an LED-lamp module. In the LED-lamp power-supply device compatible with the electronic ballast, through arrangement of the high-voltage absorption circuit, an instant high voltage when the electronic ballast is started is absorbed so that it is prevented that high-voltage power flows into a backward-stage circuit and damages the backward-stage circuit and thus stable DC is provided.
Description
Technical field
The utility model relates to LED lamp drive circuit technical field, particularly relates to a kind of LED lamp supply unit of compatible electronic ballast.
Background technology
LED is a kind of semiconductor device, and LED illumination is semiconductor lighting, and LED does not need preheating, does not also need to start with a high pressure, and only needs a constant current to drive, and require each the LED electric current in LED array to match.As a kind of illumination component of environmental protection and energy saving, LED illumination has shown its application prospect widely.
In prior art, oneself is through existing some can realize the technology of utilizing electronic ballast for fluoresent lamp to carry out driving LED.But in these implementations, fluorescent lamp is in start-up course, and the output voltage of electric ballast is one to have the transient state state of sudden change.Described electric ballast can be exported the high pressure that a numerical value is very large, prevailing value is at 500V-2000V, after startup completes, fluorescent lamp is transitioned into steady-state process by transient process, the output voltage stabilization of final electric ballast is at a magnitude of voltage, and described magnitude of voltage is by fluorescent tube length and the power determination of fluorescent lamp.When directly applying to LED driving power, LED driving power cannot bear the high pressure of start-up course, can damage late-class circuit, causes LED driving power normally to work.
Utility model content
The purpose of this utility model is to provide a kind of LED lamp supply unit of compatible electronic ballast, the problem that the instantaneous high pressure in the time of cannot bearing electric ballast startup to solve LED lamp supply unit of the prior art causes late-class circuit to damage.
The utility model embodiment provides a kind of LED lamp supply unit of compatible electronic ballast, comprises electric ballast, current rectifying and wave filtering circuit, high pressure absorbing circuit, power factor circuit and step-down constant-current circuit;
The input of described electric ballast connects AC power, the output of described electric ballast connects the input of described current rectifying and wave filtering circuit, the output of described current rectifying and wave filtering circuit connects the input of described high pressure absorbing circuit, the output of described high pressure absorbing circuit connects the input of described power factor circuit, the output of described power factor circuit connects the input of described step-down constant-current circuit, and the output of described step-down constant-current circuit connects LED lamp module.
Described high pressure absorbing circuit comprises the first diode, the 11 resistance, the 12 resistance and the 7th electrochemical capacitor, the anode of described the first diode is the input of described high pressure absorbing circuit, the first end of the 12 resistance described in the anodic bonding of described the first diode, the second end of described the 12 resistance connects the first end of described the 11 resistance, the second end of described the 11 resistance connects the negative electrode of described the first diode and the positive pole of described the 7th electrochemical capacitor, the minus earth of described the 7th electrochemical capacitor, the first end of described the 12 resistance is the output of described high pressure absorbing circuit.
Described current rectifying and wave filtering circuit comprises bridge rectifier.
Described power factor circuit comprises: the first electric capacity, the second electric capacity, the 3rd electric capacity, the second diode, the first resistance, the second resistance, the 3rd resistance, the 5th resistance, the 6th resistance, the second inductance, the first field effect transistor and the first power supply chip;
The first end of described the first electric capacity connects the first end of described the first resistance and the first end of described the second inductance, the second end ground connection of described the first electric capacity, the second end of described the first resistance connects the 3rd end of described the second inductance, the first pin of the first end of described the second electric capacity and described the first power supply chip, the second end ground connection of described the second electric capacity, the second end of described the second inductance connects the anode of described the second diode and the drain electrode of described the first field effect transistor, the grid of described the first field effect transistor connects the second pin of described the first power supply chip, the source electrode of described the first field effect transistor connects the 3rd pin of described the first power supply chip, the first end of described the second resistance, the first end of described the 3rd resistance, the first end of the first end of described the 5th resistance and described the 6th resistance, the 4th pin ground connection of described the first power supply chip, the second end of described the second resistance is connected altogether with the second end of described the 3rd resistance, the second end ground connection of described the 6th resistance, the second end of described the 5th resistance connects the negative electrode of described the second diode and the first end of described the 3rd electric capacity, the second end ground connection of described the 3rd electric capacity, the negative electrode of described the second diode is the output of described power factor circuit.
Described the first power supply chip is SA7527.
Described step-down constant-current circuit comprises the 5th electric capacity, the 6th electric capacity, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 3rd inductance, the 3rd diode and the second constant-current driven chip;
The first end of described the 7th resistance connects the negative electrode of described the 3rd diode, the first end of the first end of described the 6th electric capacity and described the tenth resistance, the second end of described the 7th resistance is the input of described step-down constant-current circuit, the second end of described the 7th resistance connects the first end of described the 5th electric capacity and the first pin of described the second constant-current driven chip, the second end ground connection of described the 5th electric capacity, the second pin of the first end of the 3rd inductance and described the second constant-current driven chip described in the anodic bonding of described the 3rd diode, the second end of described the 3rd inductance connects the second end of described the 6th electric capacity and the second end of described the tenth resistance, the 3rd pin of described the second constant-current driven chip connects the first end of described the 8th resistance and the first end of described the 9th resistance, the second end of described the 8th resistance is connected altogether with the second end of described the 9th resistance, the 4th pin ground connection of described the second constant-current driven chip, the first end of described the tenth resistance and the second end are respectively described step-down constant-current circuit positive output end and negative output terminal.
Described the second constant-current driven chip is BP2831A.
The LED lamp supply unit of a kind of compatible electronic ballast of the utility model embodiment, by high pressure absorbing circuit is set, instantaneous pressure while absorbing electric ballast startup, avoid high-tension electricity to flow into late-class circuit to damage late-class circuit, and then coordinate with power factor circuit and step-down constant-current circuit, galvanic current is provided.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the LED lamp supply unit of a kind of compatible electronic ballast of providing of the utility model embodiment;
Fig. 2 is the structural circuit figure of the LED lamp supply unit of a kind of compatible electronic ballast of providing of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
For technical scheme described in the utility model is described, below by specific embodiment, describe.
The LED lamp supply unit of a kind of compatible electronic ballast of the utility model embodiment, refers to Fig. 1, comprises electric ballast 101, current rectifying and wave filtering circuit 102, high pressure absorbing circuit 103, power factor circuit 104 and step-down constant-current circuit 105;
The input of described electric ballast 101 connects AC power, the output of described electric ballast 101 connects the input of described current rectifying and wave filtering circuit 102, the output of described current rectifying and wave filtering circuit 102 connects the input of described high pressure absorbing circuit 103, the output of described high pressure absorbing circuit 103 connects the input of described power factor circuit 104, the output of described power factor circuit 104 connects the input of described step-down constant-current circuit 105, and the output of described step-down constant-current circuit 105 connects LED lamp module.
Described electric ballast 101 inputs connect AC power, for exporting High Level AC Voltage.
102 pairs of alternating currents of described current rectifying and wave filtering circuit carry out filtering and carry out rectification to obtain the direct voltage of pulsation, concrete, and described current rectifying and wave filtering circuit 102 can be by adopting bridge rectifier to realize.
Described high pressure absorbing circuit 103, for absorbing the High Level AC Voltage of electric ballast 101 outputs, avoids flowing into late-class circuit to damage late-class circuit.
Described power factor circuit 104 is for Modulating Power factor and realize DC boosting conversion.
Described step-down constant-current circuit 105 is for step-down and export constant current signal to modules such as LED.
The LED lamp supply unit of a kind of compatible electronic ballast of the utility model embodiment, by high pressure absorbing circuit is set, instantaneous pressure while absorbing electric ballast startup, avoid high-tension electricity to flow into late-class circuit to damage late-class circuit, and then coordinate with power factor circuit and step-down constant-current circuit, galvanic current is provided.
The another kind of embodiment of the LED lamp supply unit of a kind of compatible electronic ballast of the utility model embodiment, refer to Fig. 2, described high pressure absorbing circuit 103 comprises the first diode D1, the 11 resistance R 11, the 12 resistance R 12 and the 7th electrochemical capacitor C7, the anode of described the first diode D1 is the input of described high pressure absorbing circuit 103, the first end of the 12 resistance R 12 described in the anodic bonding of described the first diode D1, the second end of described the 12 resistance R 12 connects the first end of described the 11 resistance R 11, the second end of described the 11 resistance R 11 connects the negative electrode of described the first diode D1 and the positive pole of described the 7th electrochemical capacitor C7, the minus earth of described the 7th electrochemical capacitor C7, the first end of described the 12 resistance R 12 is the output of described high pressure absorbing circuit 103.
Wherein, the 11 resistance R the 11, the 12 resistance R 12 and the 7th electrochemical capacitor C7 form absorption network, to absorb the instantaneous high pressure of electric ballast 101 outputs.
Described power factor circuit 104 comprises: the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the second diode D2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 5th resistance R 5, the 6th resistance R 6, the second inductance L 2, the first field effect transistor Q1 and the first power supply chip U1;
The first end of described the first capacitor C 1 connects the first end of described the first resistance R 1 and the first end of described the second inductance L 2, the second end ground connection of described the first capacitor C 1, the second end of described the first resistance R 1 connects the 3rd end of described the second inductance L 2, the first pin of the first end of described the second capacitor C 2 and described the first power supply chip U1, the second end ground connection of described the second capacitor C 2, the second end of described the second inductance L 2 connects the drain electrode of anode and the described first field effect transistor Q1 of described the second diode, the grid of described the first field effect transistor Q1 connects the second pin of described the first power supply chip U1, the source electrode of described the first field effect transistor Q1 connects the 3rd pin of described the first power supply chip U1, the first end of described the second resistance R 2, the first end of described the 3rd resistance R 3, the first end of the first end of described the 5th resistance R 5 and described the 6th resistance R 6, the 4th pin ground connection of described the first power supply chip U1, the second end of described the second resistance R 2 is connected altogether with the second end of described the 3rd resistance R 3, the second end ground connection of described the 6th resistance R 6, the second end of described the 5th resistance R 5 connects the negative electrode of described the second diode and the first end of described the 3rd capacitor C 3, the second end ground connection of described the 3rd capacitor C 3, the negative electrode of described the second diode is the output of described power factor circuit 104.
Preferably, described the first power supply chip U1 is SA7527.
Wherein the first capacitor C 1 is for energy storage after rectification, the first resistance R 1 and the second capacitor C 2 form the start-up circuit of the first power supply chip U1SA7527, the second inductance L 2, the first field effect transistor Q1, the second resistance R 2, the 3rd resistance R 3, the 5th resistance R 5, the 6th resistance R 6 and the second diode D2 form booster circuit, carry out PF correction, input pulsating voltage is boosted to 400V direct current simultaneously.
Described step-down constant-current circuit 105 comprises the 5th capacitor C 5, the 6th capacitor C 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 3rd inductance L 3, the 3rd diode D3 and the second constant-current driven chip U2;
The first end of described the 7th resistance R 7 connects the negative electrode of described the 3rd diode D3, the first end of the first end of described the 6th capacitor C 6 and described the tenth resistance R 10, the second end of described the 7th resistance R 7 is the input of described step-down constant-current circuit 105, the second end of described the 7th resistance R 7 connects the first end of described the 5th capacitor C 5 and the first pin of described the second constant-current driven chip U2, the second end ground connection of described the 5th capacitor C 5, the second pin of the first end of the 3rd inductance L 3 and described the second constant-current driven chip U2 described in the anodic bonding of described the 3rd diode D3, the second end of described the 3rd inductance L 3 connects the second end of described the 6th capacitor C 6 and the second end of described the tenth resistance R 10, the 3rd pin of described the second constant-current driven chip U2 connects the first end of described the 8th resistance R 8 and the first end of described the 9th resistance R 9, the second end of described the 8th resistance R 8 is connected altogether with the second end of described the 9th resistance R 9, the 4th pin ground connection of described the second constant-current driven chip U2, the first end of described the tenth resistance R 10 and the second end are respectively described step-down constant-current circuit 105 positive output ends and negative output terminal.
Described the second constant-current driven chip U2 is BP2831A.
The 7th resistance R 7, the 5th capacitor C 5 form the start-up circuit of the second constant-current driven chip U2BP2831A, the 6th capacitor C 6, the 8th resistance R 8, the 9th resistance R 9, the 3rd inductance L 3, the 3rd diode D3 are step-down constant-current circuit 105, and this circuit drops to output voltage and the electric current suitable with LED lamp module automatically the high voltage direct current of 400V.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, 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; make without departing from the concept of the premise utility some alternative or obvious modification that are equal to; and performance or purposes identical, all should be considered as belonging to the utility model by the definite scope of patent protection of submitted to claims.
Claims (7)
1. a LED lamp supply unit for compatible electronic ballast, is characterized in that, comprises electric ballast, current rectifying and wave filtering circuit, high pressure absorbing circuit, power factor circuit and step-down constant-current circuit;
The input of described electric ballast connects AC power, the output of described electric ballast connects the input of described current rectifying and wave filtering circuit, the output of described current rectifying and wave filtering circuit connects the input of described high pressure absorbing circuit, the output of described high pressure absorbing circuit connects the input of described power factor circuit, the output of described power factor circuit connects the input of described step-down constant-current circuit, and the output of described step-down constant-current circuit connects LED lamp module.
2. LED lamp supply unit as claimed in claim 1, it is characterized in that, described high pressure absorbing circuit comprises the first diode, the 11 resistance, the 12 resistance and the 7th electrochemical capacitor, the anode of described the first diode is the input of described high pressure absorbing circuit, the first end of the 12 resistance described in the anodic bonding of described the first diode, the second end of described the 12 resistance connects the first end of described the 11 resistance, the second end of described the 11 resistance connects the negative electrode of described the first diode and the positive pole of described the 7th electrochemical capacitor, the minus earth of described the 7th electrochemical capacitor, the first end of described the 12 resistance is the output of described high pressure absorbing circuit.
3. LED lamp supply unit as claimed in claim 1, is characterized in that, described current rectifying and wave filtering circuit comprises bridge rectifier.
4. LED lamp supply unit as claimed in claim 1, it is characterized in that, described power factor circuit comprises: the first electric capacity, the second electric capacity, the 3rd electric capacity, the second diode, the first resistance, the second resistance, the 3rd resistance, the 5th resistance, the 6th resistance, the second inductance, the first field effect transistor and the first power supply chip;
The first end of described the first electric capacity connects the first end of described the first resistance and the first end of described the second inductance, the second end ground connection of described the first electric capacity, the second end of described the first resistance connects the 3rd end of described the second inductance, the first pin of the first end of described the second electric capacity and described the first power supply chip, the second end ground connection of described the second electric capacity, the second end of described the second inductance connects the anode of described the second diode and the drain electrode of described the first field effect transistor, the grid of described the first field effect transistor connects the second pin of described the first power supply chip, the source electrode of described the first field effect transistor connects the 3rd pin of described the first power supply chip, the first end of described the second resistance, the first end of described the 3rd resistance, the first end of the first end of described the 5th resistance and described the 6th resistance, the 4th pin ground connection of described the first power supply chip, the second end of described the second resistance is connected altogether with the second end of described the 3rd resistance, the second end ground connection of described the 6th resistance, the second end of described the 5th resistance connects the negative electrode of described the second diode and the first end of described the 3rd electric capacity, the second end ground connection of described the 3rd electric capacity, the negative electrode of described the second diode is the output of described power factor circuit.
5. LED lamp supply unit as claimed in claim 4, is characterized in that, described the first power supply chip is SA7527.
6. LED lamp supply unit as claimed in claim 1, it is characterized in that, described step-down constant-current circuit comprises the 5th electric capacity, the 6th electric capacity, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 3rd inductance, the 3rd diode and the second constant-current driven chip;
The first end of described the 7th resistance connects the negative electrode of described the 3rd diode, the first end of the first end of described the 6th electric capacity and described the tenth resistance, the second end of described the 7th resistance is the input of described step-down constant-current circuit, the second end of described the 7th resistance connects the first end of described the 5th electric capacity and the first pin of described the second constant-current driven chip, the second end ground connection of described the 5th electric capacity, the second pin of the first end of the 3rd inductance and described the second constant-current driven chip described in the anodic bonding of described the 3rd diode, the second end of described the 3rd inductance connects the second end of described the 6th electric capacity and the second end of described the tenth resistance, the 3rd pin of described the second constant-current driven chip connects the first end of described the 8th resistance and the first end of described the 9th resistance, the second end of described the 8th resistance is connected altogether with the second end of described the 9th resistance, the 4th pin ground connection of described the second constant-current driven chip, the first end of described the tenth resistance and the second end are respectively described step-down constant-current circuit positive output end and negative output terminal.
7. LED lamp supply unit as claimed in claim 6, is characterized in that, described the second constant-current driven chip is BP2831A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086896.5U CN203827558U (en) | 2014-02-27 | 2014-02-27 | LED-lamp power-supply device compatible with electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086896.5U CN203827558U (en) | 2014-02-27 | 2014-02-27 | LED-lamp power-supply device compatible with electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203827558U true CN203827558U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420086896.5U Expired - Fee Related CN203827558U (en) | 2014-02-27 | 2014-02-27 | LED-lamp power-supply device compatible with electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203827558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451409A (en) * | 2014-09-29 | 2016-03-30 | 惠州Tcl照明电器有限公司 | Straight tube LED power supply compatible with inductance/electronic ballast |
| CN106979467A (en) * | 2016-01-15 | 2017-07-25 | 深圳市宝瑞恒业科技有限公司 | A kind of Multi-function compatible type LED lamp tube |
-
2014
- 2014-02-27 CN CN201420086896.5U patent/CN203827558U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451409A (en) * | 2014-09-29 | 2016-03-30 | 惠州Tcl照明电器有限公司 | Straight tube LED power supply compatible with inductance/electronic ballast |
| CN105451409B (en) * | 2014-09-29 | 2018-07-24 | 惠州Tcl照明电器有限公司 | The straight tube LED power of compatible inductance, electric ballast |
| CN106979467A (en) * | 2016-01-15 | 2017-07-25 | 深圳市宝瑞恒业科技有限公司 | A kind of Multi-function compatible type LED lamp tube |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20160227 |