CN206472350U - A kind of LED DC power supply circuits - Google Patents
A kind of LED DC power supply circuits Download PDFInfo
- Publication number
- CN206472350U CN206472350U CN201720179073.0U CN201720179073U CN206472350U CN 206472350 U CN206472350 U CN 206472350U CN 201720179073 U CN201720179073 U CN 201720179073U CN 206472350 U CN206472350 U CN 206472350U
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- Prior art keywords
- triode
- chip
- resistance
- led
- pin
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a kind of LED DC power supply circuits, including chip IC 1, triode V1, unidirectional thyristor Q1 and LED lamp H, the pin 1 of the chip IC 1 connects resistance R1, triode V1 colelctor electrode, triode V2 colelctor electrode and triode V3 colelctor electrode, the connection potentiometer of pin 2 RP1 of chip IC 1 fixing end, the connection resistance of pin 3 R3, resistance R6, electric capacity C1, potentiometer RP1 another fixing end, unidirectional thyristor Q1 negative electrode and the LED lamp H of chip IC 1.The utility model LED DC power supply circuits are simple in construction, component is few; circuit is detected to the overcurrent and overvoltage in circuit respectively using voltage comparator and triode; LED can be effectively protected when running into overcurrent and overvoltage, therefore has the advantages that vdiverse in function, performance is stable and easy to use.
Description
Technical field
The utility model is related to a kind of LED flashlight, specifically a kind of LED DC power supply circuits.
Background technology
As the negative effect caused by Global Greenhouse Effect constantly shows, every country all makees energy-saving and emission-reduction in the world
By the major issue that must take into consideration in native economic development, LED lighting engineering is exactly arisen at the historic moment under this background
An emerging power-saving technology.Current LED illuminating products have been had been applied in daily life, with developing rapidly for LED.
There is the conventional light source that present white LED light source is compared long lifespan, solid state lighting to be hardly damaged, specular removal, mercury-free are environmentally friendly, antidetonation
The advantages of, future will turn into third generation light source, will bring the revolution, the existing big multifunctional single of illuminating lamp again of lighting field
One, easily damaged by over-voltage and over-current, therefore need to be improved.
Utility model content
The purpose of this utility model is to provide a kind of LED DC power supply circuits, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the utility model provides following technical scheme：
A kind of LED DC power supply circuits, including chip IC 1, triode V1, unidirectional thyristor Q1 and LED lamp H, it is described
The pin 1 of chip IC 1 connects resistance R1, triode V1 colelctor electrode, triode V2 colelctor electrode and triode V3 colelctor electrode,
The connection potentiometer of pin 2 RP1 of chip IC 1 fixing end, the connection resistance of pin 3 R3, resistance R6, the electric capacity of chip IC 1
C1, potentiometer RP1 another fixing end, unidirectional thyristor Q1 negative electrode and LED lamp H, potentiometer RP1 sliding end connection
The pin 3 of chip IC 2, resistance R3 other end connection resistance R2 and the pin 1 of chip IC 2, the pin 4 of chip IC 2 connects electricity
Hinder R4, the resistance R4 other end connection unidirectional thyristor Q1 anode and triode V3 base stage, resistance R1 other end connection
Triode V1 base stage, triode V1 emitter stage connection resistance R5, resistance the R5 other end connection electric capacity C1 other end, electricity
Hinder the R6 other end and unidirectional thyristor Q1 control pole, triode V3 emitter stage connecting triode V2 base stage, triode
The V2 emitter stage connection resistance R2 other end and the LED lamp H other end, the model AD581 of the chip IC 1, chip
IC2 model LM321.
It is used as preferred scheme of the present utility model：The power supply VCC is the 24V obtained after 220V civil powers are depressured through over commutation
Rectified alternating current.
It is used as preferred scheme of the present utility model：The model AD581 of the chip IC 1, the model of chip IC 2
LM339。
It is used as preferred scheme of the present utility model：The triode V2 and triode V2 constitute Darlington transistor.
It is used as preferred scheme of the present utility model：The model C458 of the triode V1.
Compared with prior art, the beneficial effects of the utility model are：The letter of the utility model LED DC power supply circuits structure
Single, component is few, and circuit is detected to the overcurrent and overvoltage in circuit respectively using voltage comparator and triode, meets
To effectively protecting LED when overcurrent and overvoltage, therefore with stable and easy to use excellent of vdiverse in function, performance
Point.
Brief description of the drawings
Fig. 1 is the circuit diagram of LED DC power supply circuits.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, a kind of LED DC power supply circuits, including chip IC 1, triode
V1, unidirectional thyristor Q1 and LED lamp H, the connection resistance of pin 1 R1 of the chip IC 1, triode V1 colelctor electrode, three poles
Pipe V2 colelctor electrode and triode V3 colelctor electrode, the connection potentiometer of pin 2 RP1 of chip IC 1 fixing end, chip
The IC1 connection resistance of pin 3 R3, resistance R6, electric capacity C1, potentiometer RP1 another fixing end, unidirectional thyristor Q1 negative electrode
With LED lamp H, potentiometer RP1 sliding end connects the pin 3 of chip IC 2, resistance R3 other end connection resistance R2 and chip
IC2 pin 1, the connection of pin 4 the resistance R4, resistance R4 of chip IC 2 other end connection unidirectional thyristor Q1 anode and three
Pole pipe V3 base stage, resistance R1 other end connecting triode V1 base stage, triode V1 emitter stage connection resistance R5, resistance
The R5 other end connects the control pole of the electric capacity C1 other end, the resistance R6 other end and unidirectional thyristor Q1, triode V3's
Emitter stage connecting triode V2 base stage, the triode V2 emitter stage connection resistance R2 other end and LED lamp H's is another
End, the model AD581 of the chip IC 1, the model LM321 of chip IC 2.
Power supply VCC is the 24V Rectified alternating currents obtained after 220V civil powers are depressured through over commutation.The model of chip IC 1
AD581, the model LM339 of chip IC 2.Triode V2 and triode V2 composition Darlington transistors.Triode V1 model
C458。
Operation principle of the present utility model is：Under normal circumstances, the 4 pin output high level of chip IC 1 so that triode V3
With triode V2 successive conductives, LED lamp H obtain it is electric be lit, triode V1 and unidirectional thyristor Q1 composition excessively stream cut-off types are protected
Slightly, resistance R1 can be used for setting maximum current to shield electricity, when running into overcurrent condition, cause triode V1 by resistance R1 voltage
Base stage obtain electric, triode V1 conductings, unidirectional thyristor Q1 control pole obtains electric triggering, Q1 conductings, so that by triode V3's
Base potential is dragged down, and triode V3 and triode V2 are turned off, and reach the purpose of overcurrent protection.Control machines end connects electric capacity
C1 and resistance R6, is protection circuit frequent movement when being used to prevent capacity load.Chip IC 2 is overvoltage protection detecting element,
When running into overpressure situation, the voltage after resistance R2 and resistance R3 partial pressures draws high 1 pin current potential of chip IC 2, so that
Chip IC 2 exports low level, again such that triode V3 base potentials decline, disconnects LED lamp H, reaches the mesh of overvoltage protection
's.
Claims (5)
1. a kind of LED DC power supply circuits, including chip IC 1, triode V1, unidirectional thyristor Q1 and LED lamp H, its feature
It is, the connection resistance of pin 1 R1, triode V1 colelctor electrode, triode V2 colelctor electrode and the triode V3 of the chip IC 1
Colelctor electrode, the connection of the pin 2 potentiometer RP1 of chip IC 1 fixing end, the connection resistance of pin 3 R3, the electricity of chip IC 1
R6, electric capacity C1, potentiometer RP1 another fixing end, unidirectional thyristor Q1 negative electrode and LED lamp H are hindered, potentiometer RP1's
Sliding end connects the pin 3 of chip IC 2, and resistance R3 other end connection resistance R2 and the pin 1 of chip IC 2, chip IC 2 are drawn
Pin 4 connects resistance R4, and the resistance R4 other end connects unidirectional thyristor Q1 anode and triode V3 base stage, and resistance R1's is another
One end connecting triode V1 base stage, triode V1 emitter stage connection resistance R5, resistance R5 other end connection electric capacity C1's
The control pole of the other end, the resistance R6 other end and unidirectional thyristor Q1, triode V3 emitter stage connecting triode V2 base
Pole, triode V2 emitter stage connection resistance the R2 other end and the LED lamp H other end.
2. LED DC power supply circuits according to claim 1, it is characterised in that the power supply VCC passes through for 220V civil powers
The 24V Rectified alternating currents obtained after rectification decompression.
3. LED DC power supply circuits according to claim 1, it is characterised in that the model AD581 of the chip IC 1,
The model LM339 of chip IC 2.
4. LED DC power supply circuits according to claim 1, it is characterised in that triode V2 and triode the V2 groups
Into Darlington transistor.
5. LED DC power supply circuits according to claim 1, it is characterised in that the model C458 of the triode V1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720179073.0U CN206472350U (en) | 2017-02-27 | 2017-02-27 | A kind of LED DC power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720179073.0U CN206472350U (en) | 2017-02-27 | 2017-02-27 | A kind of LED DC power supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206472350U true CN206472350U (en) | 2017-09-05 |
Family
ID=59712910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720179073.0U Expired - Fee Related CN206472350U (en) | 2017-02-27 | 2017-02-27 | A kind of LED DC power supply circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206472350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661234A (en) * | 2019-04-30 | 2020-01-07 | 广东明丰电源电器实业有限公司 | One-way silicon controlled rectifier short-circuit protection circuit and electronic equipment |
-
2017
- 2017-02-27 CN CN201720179073.0U patent/CN206472350U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661234A (en) * | 2019-04-30 | 2020-01-07 | 广东明丰电源电器实业有限公司 | One-way silicon controlled rectifier short-circuit protection circuit and electronic equipment |
| CN110661234B (en) * | 2019-04-30 | 2022-07-05 | 广东明丰电源电器实业有限公司 | One-way silicon controlled rectifier short-circuit protection circuit and electronic equipment |
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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 |
Granted publication date: 20170905 Termination date: 20180227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |