CN214757021U - Lamp driving circuit with overvoltage protection - Google Patents
Lamp driving circuit with overvoltage protection Download PDFInfo
- Publication number
- CN214757021U CN214757021U CN202120942073.8U CN202120942073U CN214757021U CN 214757021 U CN214757021 U CN 214757021U CN 202120942073 U CN202120942073 U CN 202120942073U CN 214757021 U CN214757021 U CN 214757021U
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- China
- Prior art keywords
- triode
- resistor
- circuit
- control circuit
- drive control
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- Expired - Fee Related
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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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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a lamps and lanterns drive circuit with overvoltage protection, including power input end, with the rectification filter circuit that power input end is connected, with the drive control circuit that rectification filter circuit is connected, with the output terminal that drive control circuit is connected still includes overvoltage crowbar, overvoltage crowbar includes zener diode, one-way diode and second electric capacity, zener diode with connect on drive control circuit after the second electric capacity is established ties, one-way diode's positive pole is connected on the tie point of zener diode and second electric capacity, the negative pole is connected with drive control circuit. The utility model discloses a structure sets up rationally, and it not only can effectual realization drive, has reduced integrated chip's application moreover, is favorable to reduce cost, not only has overvoltage protection function, and the electric current has better linear adjustment rate when input voltage 176 supplyes materials 264V moreover, and the suitability is strong and the practicality is good.
Description
Technical Field
The utility model belongs to the technical field of the lamps and lanterns drive, concretely relates to lamps and lanterns drive circuit with overvoltage protection.
Background
With the maturity of the LED lamp technology, various LED lamps are developed rapidly, and the LED lamps are equipped with driving circuits, the driving circuits in the prior art mostly directly adopt integrated chips to match with corresponding circuits, however, the integrated chips are not only higher in cost, but also inconvenient in maintenance and repair, and do not have overvoltage protection modules, thereby affecting the use stability, and meanwhile, the driving circuits in the prior art are lower in the linear adjustment rate of current precision when the input voltage 176 and 264V are supplemented, thereby affecting the application range of the driving circuits to a certain extent, and the practicability is limited.
Disclosure of Invention
The utility model aims at providing a structure sets up reasonable and the suitability is strong has overvoltage protection's lamps and lanterns drive circuit.
Realize the technical scheme of the purpose is a lamps and lanterns drive circuit with overvoltage protection, including power input end, with the rectifier and filter circuit that power input end is connected, with the drive control circuit that rectifier and filter circuit is connected, with the output terminal that drive control circuit is connected still includes overvoltage crowbar, overvoltage crowbar includes zener diode, one-way diode and second electric capacity, zener diode with connect on drive control circuit after the second electric capacity is established ties, one-way diode's positive pole is connected on the tie point of zener diode and second electric capacity, the negative pole is connected with drive control circuit.
The drive control circuit comprises a first triode, a second triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor and a transformer, wherein a collector of the first triode is connected with a rectification filter circuit, an emitter of the first triode is connected with the positive electrode of the input end of the transformer through a parallel circuit of the sixth resistor and the seventh resistor, the first resistor and the second resistor are connected between the collector and the base of the first triode after being connected in series, the base of the first triode is connected with the collector of the second triode, the emitter of the first triode is connected with the base of the second triode through the third resistor, the second capacitor is connected with the emitter of the second triode, the negative electrode of the unidirectional diode is connected with the base of the first triode, the fourth resistor is connected between the negative electrode of the zener diode and the base of the second triode, and the emitter of the second triode is connected with the negative electrode of the input end of the transformer, and the first capacitor and the fifth resistor are connected in series and then connected with the collector of the second triode and the negative electrode of the voltage stabilizing diode.
The first triode and the second triode are both NPN type triodes.
The utility model discloses has positive effect: the utility model discloses a structure sets up rationally, it not only can effectual realization drive, and reduced integrated chip's application, and compare integrated chip, it has better anti surge performance and environment suitability, use in the abominable environment more can be applicable to, and be favorable to reduce cost, it is provided with overvoltage crowbar circuit simultaneously, overvoltage crowbar function not only has, and the electric current has better linear adjustment rate when input voltage 176 supplyes mutually 264V, use reliable and stable, the suitability is strong and the practicality is good.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the following specific embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
(example 1)
Fig. 1 shows a specific embodiment of the present invention, wherein fig. 1 is a schematic circuit diagram of the present invention.
Referring to fig. 1, a lamp driving circuit with overvoltage protection includes a power input terminal 1, a rectifying and filtering circuit 2 connected to the power input terminal, a driving control circuit 3 connected to the rectifying and filtering circuit, an output terminal 4 connected to the driving control circuit, and an overvoltage protection circuit 5, where the overvoltage protection circuit includes a zener diode D6, a unidirectional diode D7, and a second capacitor C2, the zener diode is connected to the driving control circuit after being connected to the second capacitor in series, an anode of the unidirectional diode is connected to a connection point of the zener diode and the second capacitor, and a cathode of the unidirectional diode is connected to the driving control circuit.
The driving control circuit 3 comprises a first triode Q1, a second triode Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1 and a transformer L, wherein a collector of the first triode is connected with the rectifying and filtering circuit, an emitter of the first triode is connected with the positive electrode of the input end of the transformer through a parallel circuit of the sixth resistor and the seventh resistor, the first resistor and the second resistor are connected in series and then connected between the collector and the base of the first triode, a base of the first triode is connected with a collector of the second triode, the emitter of the first triode is connected with the base of the second triode through the third resistor, the second capacitor is connected with the emitter of the second triode, and the negative electrode of the one-way diode is connected with the base of the first triode, the fourth resistor is connected between the negative electrode of the voltage stabilizing diode and the base electrode of the second triode, the emitting electrode of the second triode is connected with the negative electrode of the input end of the transformer, and the first capacitor and the fifth resistor are connected in series and then connected to the collecting electrode of the second triode and the negative electrode of the voltage stabilizing diode.
The first triode and the second triode are both NPN type triodes.
The utility model discloses a structure sets up rationally, it not only can effectual realization drive, and reduced integrated chip's application, and compare integrated chip, it has better anti surge performance and environment suitability, use in the abominable environment more can be applicable to, and be favorable to reduce cost, it is provided with overvoltage crowbar circuit simultaneously, overvoltage crowbar function not only has, and the electric current has better linear adjustment rate when input voltage 176 supplyes mutually 264V, use reliable and stable, the suitability is strong and the practicality is good.
The standard parts used in the present embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification can also be obtained directly by processing according to the common general knowledge of the prior art without any doubt, and the connection mode of the parts adopts the conventional means matured in the prior art, and the machines, parts and equipment adopt the conventional models in the prior art, so that the detailed description is not given here.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.
Claims (3)
1. The utility model provides a lamps and lanterns drive circuit with overvoltage protection, includes power input end, with the rectification filter circuit that power input end is connected, with the drive control circuit that rectification filter circuit is connected, with the output terminal that drive control circuit is connected which characterized in that: the overvoltage protection circuit comprises a voltage stabilizing diode, a one-way diode and a second capacitor, the voltage stabilizing diode is connected with the second capacitor in series and then connected to the drive control circuit, the anode of the one-way diode is connected to the connection point of the voltage stabilizing diode and the second capacitor, and the cathode of the one-way diode is connected to the drive control circuit.
2. The lamp driver circuit with overvoltage protection as claimed in claim 1, wherein: the drive control circuit comprises a first triode, a second triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor and a transformer, wherein a collector of the first triode is connected with a rectification filter circuit, an emitter of the first triode is connected with the positive electrode of the input end of the transformer through a parallel circuit of the sixth resistor and the seventh resistor, the first resistor and the second resistor are connected between the collector and the base of the first triode after being connected in series, the base of the first triode is connected with the collector of the second triode, the emitter of the first triode is connected with the base of the second triode through the third resistor, the second capacitor is connected with the emitter of the second triode, the negative electrode of the unidirectional diode is connected with the base of the first triode, the fourth resistor is connected between the negative electrode of the zener diode and the base of the second triode, and the emitter of the second triode is connected with the negative electrode of the input end of the transformer, and the first capacitor and the fifth resistor are connected in series and then connected with the collector of the second triode and the negative electrode of the voltage stabilizing diode.
3. A lamp driver circuit with overvoltage protection as claimed in claim 2 wherein: the first triode and the second triode are both NPN type triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120942073.8U CN214757021U (en) | 2021-04-30 | 2021-04-30 | Lamp driving circuit with overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120942073.8U CN214757021U (en) | 2021-04-30 | 2021-04-30 | Lamp driving circuit with overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214757021U true CN214757021U (en) | 2021-11-16 |
Family
ID=78616352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120942073.8U Expired - Fee Related CN214757021U (en) | 2021-04-30 | 2021-04-30 | Lamp driving circuit with overvoltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214757021U (en) |
-
2021
- 2021-04-30 CN CN202120942073.8U patent/CN214757021U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20211116 |