CN204994026U - High -power LED lamp driving circuit - Google Patents
High -power LED lamp driving circuit Download PDFInfo
- Publication number
- CN204994026U CN204994026U CN201520794088.9U CN201520794088U CN204994026U CN 204994026 U CN204994026 U CN 204994026U CN 201520794088 U CN201520794088 U CN 201520794088U CN 204994026 U CN204994026 U CN 204994026U
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- CN
- China
- Prior art keywords
- pin
- resistance
- side winding
- led lamp
- driving circuit
- 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.)
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Classifications
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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 discloses a high -power LED lamp driving circuit, including alternating voltage, bridge type rectifier circuit, LED lamp, still include MT7930 chip, transformer T1, power factor control circuit, the MT7930 chip includes pin DRV, pin GND, pin TM, pin COMP, pin STP, pin DSEN, pin VDD, pin CS, and the transformer includes side winding np, side winding na, output ns. The utility model provides a pair of high -power LED lamp driving circuit has integrated power factor correction function, and work can reach very little total harmonic distortion electric current in DCM and invariable turn -off time mode. Simultaneously, overcurrent protection, overvoltage protection, short -circuit protection and mistake can also be realized and the protection is held to ensure that the system works reliably.
Description
Technical field
The utility model relates to a kind of driving circuit of high-power LED lamp, belongs to LED lamp drive circuit technical field.
Background technology
The light in dining room should be warm, comfortable to the sensation of people.LED dining room lamp, while meeting base lighting, more easily builds a kind of sentiment of dining.Therefore, LED string should select warm tones, intensity adjustable lamp source as far as possible.So this just requires that namely drive circuit supports high-powered LED lamp string, adjustable flexibly again.
Utility model content
Object: in order to overcome the deficiencies in the prior art, the utility model provides a kind of driving circuit of high-power LED lamp.
Technical scheme: for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of driving circuit of high-power LED lamp, comprise alternating voltage, bridge rectifier, LED, also comprise MT7930 chip, transformer T1, power factor control circuit, described MT7930 chip comprises pin DRV, pin GND, pin TM, pin COMP, pin STP, pin DSEN, pin VDD, pin CS, transformer comprises side winding Np, side winding Na, output Ns, and described power factor control circuit comprises resistance R1, electric capacity C2, resistance R3, diode VD3, diode VD2, resistance R7, resistance R5, resistance R6, electric capacity C3, metal-oxide-semiconductor, described electric capacity C2, the diode VD3 that plays a reversed role after resistance R3 is in parallel is connected with side winding Np, described side winding Np is connected with pin STP through resistance R1, described side winding Na is through diode VD2, resistance R7 is connected with pin VDD, side winding Na is connected with pin DSEN through resistance R5, side winding Na is through resistance R5, resistance R6 is connected with pin TM, described side winding Na is through resistance R5, resistance R6, electric capacity C3 is connected with pin COMP, described pin GND ground connection, described metal-oxide-semiconductor grid is connected with pin DRV, described metal-oxide-semiconductor drain electrode is connected with side winding Np, metal-oxide-semiconductor source ground, be connected with LED after described output Ns series diode VD8, shunt capacitance C8, resistance R10.
Ground connection after also bag measuring resistance R4, described measuring resistance R4 are connected with pin CS.
Also comprise filter capacitor C1, described filter capacitor C1 and side winding Np is in parallel.
Also comprise protection electric capacity C5, ground connection after described protection electric capacity C5 is connected with pin VDD.
Also comprise fuse F1, described fuse F1 and alternating voltage are in series.
Preferably, described LED power setting is 50W.
Beneficial effect: a kind of driving circuit of high-power LED lamp that the utility model provides, adopts a single-stage, High Power Factor, primary side to control interchange and turns direct-current LED driving chip.This circuit has integrated power factor correcting function, is operated in DCM and constant off-time mode, can reach very little total harmonic distortion electric current.Meanwhile, overcurrent protection, overvoltage protection, short-circuit protection can also be realized and cross holding protection, to guarantee that system reliably works.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of driving circuit of high-power LED lamp, comprise alternating voltage, bridge rectifier, LED, also comprise MT7930 chip, transformer T1, power factor control circuit, described MT7930 chip comprises pin DRV, pin GND, pin TM, pin COMP, pin STP, pin DSEN, pin VDD, pin CS, transformer comprises side winding Np, side winding Na, output Ns, described power factor control circuit comprises resistance R1, electric capacity C2, resistance R3, diode VD3, diode VD2, resistance R7, resistance R5, resistance R6, electric capacity C3, metal-oxide-semiconductor, described electric capacity C2, the diode VD3 that plays a reversed role after resistance R3 is in parallel is connected with side winding Np, described side winding Np is connected with pin STP through resistance R1, described side winding Na is through diode VD2, resistance R7 is connected with pin VDD, side winding Na is connected with pin DSEN through resistance R5, side winding Na is through resistance R5, resistance R6 is connected with pin TM, described side winding Na is through resistance R5, resistance R6, electric capacity C3 is connected with pin COMP, described pin GND ground connection, described metal-oxide-semiconductor grid is connected with pin DRV, described metal-oxide-semiconductor drain electrode is connected with side winding Np, metal-oxide-semiconductor source ground, be connected with LED after described output Ns series diode VD8, shunt capacitance C8, resistance R10.
Ground connection after also bag measuring resistance R4, described measuring resistance R4 are connected with pin CS.
Also comprise filter capacitor C1, described filter capacitor C1 and side winding Np is in parallel.
Also comprise protection electric capacity C5, ground connection after described protection electric capacity C5 is connected with pin VDD.
Also comprise fuse F1, described fuse F1 and alternating voltage are in series.
Preferably, described LED power setting is 50W.
Concrete occupation mode is as follows: in start-up course, and pin VDD is charged by the resistance R1 on bus.When pin VDD reaches 18V, control logic is just started working, and metal-oxide-semiconductor raster data model pin DRV starts output pulse signal.Once the voltage on output Ns rises enough high, the power supply of chip will be provided by side winding Na.The voltage of pin STP will be about 0.2V lower than pin vdd voltage, if pin VDD is lower than 7.2V, then MT7930 chip will be closed automatically.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. a driving circuit of high-power LED lamp, comprise alternating voltage, bridge rectifier, LED, it is characterized in that: also comprise MT7930 chip, transformer T1, power factor control circuit, described MT7930 chip comprises pin DRV, pin GND, pin TM, pin COMP, pin STP, pin DSEN, pin VDD, pin CS, transformer comprises side winding Np, side winding Na, output Ns, described power factor control circuit comprises resistance R1, electric capacity C2, resistance R3, diode VD3, diode VD2, resistance R7, resistance R5, resistance R6, electric capacity C3, metal-oxide-semiconductor, described electric capacity C2, the diode VD3 that plays a reversed role after resistance R3 is in parallel is connected with side winding Np, described side winding Np is connected with pin STP through resistance R1, described side winding Na is through diode VD2, resistance R7 is connected with pin VDD, side winding Na is connected with pin DSEN through resistance R5, side winding Na is through resistance R5, resistance R6 is connected with pin TM, described side winding Na is through resistance R5, resistance R6, electric capacity C3 is connected with pin COMP, described pin GND ground connection, described metal-oxide-semiconductor grid is connected with pin DRV, described metal-oxide-semiconductor drain electrode is connected with side winding Np, metal-oxide-semiconductor source ground, be connected with LED after described output Ns series diode VD8, shunt capacitance C8, resistance R10.
2. a kind of driving circuit of high-power LED lamp according to claim 1, is characterized in that: also bag measuring resistance R4, ground connection after described measuring resistance R4 is connected with pin CS.
3. a kind of driving circuit of high-power LED lamp according to claim 1, is characterized in that: also comprise filter capacitor C1, and described filter capacitor C1 and side winding Np is in parallel.
4. a kind of driving circuit of high-power LED lamp according to claim 1, is characterized in that: also comprise protection electric capacity C5, ground connection after described protection electric capacity C5 is connected with pin VDD.
5. a kind of driving circuit of high-power LED lamp according to claim 1, is characterized in that: also comprise fuse F1, described fuse F1 and alternating voltage are in series.
6. a kind of driving circuit of high-power LED lamp according to claim 1, is characterized in that: described LED power setting is 50W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794088.9U CN204994026U (en) | 2015-10-15 | 2015-10-15 | High -power LED lamp driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794088.9U CN204994026U (en) | 2015-10-15 | 2015-10-15 | High -power LED lamp driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204994026U true CN204994026U (en) | 2016-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520794088.9U Expired - Fee Related CN204994026U (en) | 2015-10-15 | 2015-10-15 | High -power LED lamp driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204994026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142317A (en) * | 2015-10-15 | 2015-12-09 | 苏州汉克山姆照明科技有限公司 | High-power LED lamp driving circuit |
-
2015
- 2015-10-15 CN CN201520794088.9U patent/CN204994026U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142317A (en) * | 2015-10-15 | 2015-12-09 | 苏州汉克山姆照明科技有限公司 | High-power LED lamp driving circuit |
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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: 20160120 Termination date: 20161015 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |