CN209845388U - Novel LED power supply - Google Patents
Novel LED power supply Download PDFInfo
- Publication number
- CN209845388U CN209845388U CN201920423402.0U CN201920423402U CN209845388U CN 209845388 U CN209845388 U CN 209845388U CN 201920423402 U CN201920423402 U CN 201920423402U CN 209845388 U CN209845388 U CN 209845388U
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- circuit
- power supply
- led
- main control
- control circuit
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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]
Abstract
The utility model discloses a novel LED power, overcurrent overvoltage crowbar and PFC circuit connection, PFC circuit pass through preceding stage rectification filter circuit respectively with auxiliary power supply, the soft switch circuit connection of high frequency, the soft switch circuit of high frequency passes back level rectification filter circuit and is connected with the LED load, the LED load is connected with current sensor, current sensor passes through current feedback circuit and is connected with singlechip main control circuit, back level rectification filter circuit passes through voltage feedback circuit and is connected with singlechip main control circuit, auxiliary power supply is connected with singlechip main control circuit, singlechip main control circuit and the soft switch circuit connection of high frequency, the utility model discloses can reduce the loss of power, ensure switching power supply, LED's reliability, improve life, promote the whole efficiency of LED power.
Description
Technical Field
The utility model relates to a LED technical field, specific novel LED power that says so.
Background
The LED as an environment-friendly light source newly developed in the century has the advantages of high luminous efficiency, good monochromaticity, long service life, energy conservation, high efficiency and the like, but is greatly influenced by a switching power supply driven by the LED, the power consumption of the switching power supply is composed of the loss of a switching power tube, the loss of a switching transformer loss rectifier tube and the loss of other auxiliary circuits, the proportion of the loss of the switching power tube in the loss of the whole power supply is the largest, the energy consumption of the LED switching power supply is high, the service lives of the switching power supply and the LED are shortened, and the overall efficiency of the switching power supply is reduced.
Therefore, the novel LED power supply which is designed for overcoming the defects of the technology, has a simple structure, reduces the loss of the power supply, ensures the reliability and service life of the switching power supply and the LED to be matched and improves the overall efficiency of the LED power supply is just the problem to be solved by the inventor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel LED power can reduce the loss of power, ensures switching power supply, LED's reliability and life phase-match, promotes the overall efficiency of LED power.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a novel LED power, its includes overcurrent overvoltage protection circuit, PFC circuit, preceding stage rectifier filter circuit, back level rectifier filter circuit, high frequency soft switch circuit, auxiliary power supply, singlechip master control circuit, LED load, overcurrent overvoltage protection circuit and PFC circuit connection, PFC circuit passes through preceding stage rectifier filter circuit and is connected with auxiliary power supply, high frequency soft switch circuit respectively, high frequency soft switch circuit passes through back level rectifier filter circuit and is connected with the LED load, the LED load is connected with current sensor, current sensor passes through current feedback circuit and is connected with singlechip master control circuit, back level rectifier filter circuit passes through voltage feedback circuit and is connected with singlechip master control circuit, auxiliary power supply is connected with singlechip master control circuit, singlechip master control circuit and high frequency soft switch circuit are connected.
Further, a main switching tube on the high-frequency soft switching circuit adopts a 2SK2110 field effect tube.
Further, the driving module of the single chip microcomputer master control circuit adopts an NCP5181 driver to drive output.
The utility model has the advantages that:
1. the utility model discloses a singlechip master control circuit is LED switching power supply circuit's switch master control module, makes the main switch pipe be in soft switch operating condition through electric capacity inductance resonant circuit, can reduce main switch pipe, switching power supply's loss, improves LED power life to promote switching power supply's whole efficiency, further promote the whole efficiency of LED power.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a circuit diagram of the high frequency soft switch of the present invention.
Detailed Description
The invention will be further described with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents also fall within the scope of the appended claims.
Referring to fig. 1, the block diagram of the structure of the present invention, referring to fig. 2, the high frequency soft switching circuit diagram of the present invention, the structure is a new type of LED power source, the high-frequency soft switching circuit is connected with the LED load through the rear-stage rectification filter circuit, the LED load is connected with a current sensor, the current sensor is connected with the main control circuit of the single chip microcomputer through a current feedback circuit, the rear-stage rectification filter circuit is connected with the main control circuit of the single chip microcomputer through a voltage feedback circuit, the auxiliary power supply is connected with the main control circuit of the single chip microcomputer, and the main control circuit of the single chip microcomputer is connected with the high-frequency soft switching circuit.
The main switch tube on the high-frequency soft switch circuit adopts a field effect tube 2SK2110, a field effect tube 2SK1120 is a field effect tube with 1000V, 2.5A and N channels, and the sequence of pins is G, D and S. Control trigger signals of Q1 and Q2 are drive output of a drive module NCP5181 of a main control circuit part of the single chip microcomputer, when a field effect tube Q1 is switched on and Q2 is switched off, a positive half cycle of a transformer T1 is carried out, and the transformer T1 converts energy; when the Q1 is cut off and the Q2 is conducted, the negative half cycle of the transformer T1 and the transformer T1 also convert energy to form a half-bridge soft switching conversion circuit.
At the instant when the FET is turned off, the high voltage pulse is fed back to the power supply by the ultrafast recovery diode. Because the capacitors C17 and C18 also have good spike cutting function, the field effect transistors Q1 and Q2 are protected, so that the field effect transistors are not easy to break down, and the reliability of the circuit is improved.
The driving module of the single chip microcomputer main control circuit adopts an NCP5181 driver to drive output, the NCP5181 module is a high-voltage power MOSFET driver, and is suitable for half-bridge or any other high-side and low-side occasions to provide 2 direct drives of two outputs and provide direct drive for N-channel power MOSFET high-side switching tubes of Q1 and Q2.
In order to eliminate switching loss, capacitors C9 and C6 are respectively connected in parallel with two switching tubes Q1 and Q2 to form a soft switching circuit, when the switching tubes Q1 and Q2 are turned off, the current of the switching tubes returns to zero from negative in advance before the voltage of the switching tubes rises, and the current of the switching tube Q1 is kept at zero in the whole rectangular region after the voltage of the switching tube Q1 rises from 0 to falls, so that the switching tube is operated in a soft switching state.
The utility model discloses a singlechip master control circuit is LED switching power supply circuit's switch master control module, makes the main switch pipe be in soft switch operating condition through electric capacity inductance resonant circuit, can reduce main switch pipe, switching power supply's loss to promote switching power supply's whole efficiency, further promote the whole efficiency of LED power.
Claims (3)
1. A novel LED power supply is characterized in that: the LED overcurrent and overvoltage protection circuit comprises an overcurrent and overvoltage protection circuit, a PFC circuit, a preceding stage rectification filter circuit, a rear stage rectification filter circuit, a high-frequency soft switching circuit, an auxiliary power supply, a single chip microcomputer main control circuit and an LED load, wherein the overcurrent and overvoltage protection circuit is connected with the PFC circuit, the PFC circuit is respectively connected with the auxiliary power supply and the high-frequency soft switching circuit through the preceding stage rectification filter circuit, the high-frequency soft switching circuit is connected with the LED load through the rear stage rectification filter circuit, the LED load is connected with a current sensor, the current sensor is connected with the single chip microcomputer main control circuit through a current feedback circuit, the rear stage rectification filter circuit is connected with the single chip microcomputer main control circuit through a voltage feedback circuit, the auxiliary power supply is connected with the single chip microcomputer main control circuit, and the single chip microcomputer main control.
2. The novel LED power supply of claim 1, wherein: the main switch tube on the high-frequency soft switch circuit adopts a 2SK2110 field effect tube.
3. The novel LED power supply of claim 1, wherein: and the driving module of the singlechip master control circuit adopts an NCP5181 driver to drive output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920423402.0U CN209845388U (en) | 2019-03-22 | 2019-03-22 | Novel LED power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920423402.0U CN209845388U (en) | 2019-03-22 | 2019-03-22 | Novel LED power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209845388U true CN209845388U (en) | 2019-12-24 |
Family
ID=68908975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920423402.0U Active CN209845388U (en) | 2019-03-22 | 2019-03-22 | Novel LED power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209845388U (en) |
-
2019
- 2019-03-22 CN CN201920423402.0U patent/CN209845388U/en active Active
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