CN211744802U - Full-bridge type LED driving circuit - Google Patents
Full-bridge type LED driving circuit Download PDFInfo
- Publication number
- CN211744802U CN211744802U CN202020472041.1U CN202020472041U CN211744802U CN 211744802 U CN211744802 U CN 211744802U CN 202020472041 U CN202020472041 U CN 202020472041U CN 211744802 U CN211744802 U CN 211744802U
- Authority
- CN
- China
- Prior art keywords
- triode
- resistor
- electrode
- led
- driving signal
- 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.)
- Active
Links
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a full bridge type LED drive circuit, its characterized in that: the LED lamp comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an LED; the base electrode of the triode Q1 is connected with a voltage positive electrode VO + through a resistor R1, the base electrode of the triode Q1 is connected with the collector electrode of the triode Q2 through a resistor R2, and the voltage positive electrode VO + is connected with the emitter electrode of the triode Q1; the base electrode of the triode Q2 is connected with the voltage positive electrode VO + through a resistor R3, and the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1 through a resistor R4; the full-bridge LED driving circuit has the advantages that only two output lines are needed, the cost is reduced, the control is flexible, and the LED animation effect is diversified.
Description
Technical Field
The utility model relates to a LED drive power supply technical field specifically is a full bridge type LED drive circuit.
Background
The general requirements of LED lamps used for outdoor decoration can be dynamically changed, if the starry flashing effect is to be realized, at least two strings of lamp strings are needed, and if each string of the two strings of lamp strings is independently controlled, three output lines of voltage VO, LED1 and LED2 are needed; the control is inconvenient, and for this reason, a full-bridge type LED driving circuit is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a full bridge type LED drive circuit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a full-bridge LED drive circuit is characterized in that: the LED lamp comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an LED; the base electrode of the triode Q1 is connected with a voltage positive electrode VO + through a resistor R1, the base electrode of the triode Q1 is connected with the collector electrode of the triode Q2 through a resistor R2, and the voltage positive electrode VO + is connected with the emitter electrode of the triode Q1; the base electrode of the triode Q2 is connected with the voltage positive electrode VO + through a resistor R3, and the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1 through a resistor R4; the positive voltage VO + is connected with an emitting electrode of a triode Q2; the DRive signal DRive1 is connected with the base electrode of the triode Q3 through a resistor R5, the DRive signal DRive2 is connected with the base electrode of the triode Q4 through a resistor R6, and the emitter electrode of the triode Q3 and the emitter electrode of the triode Q4 are both connected with the negative voltage VO < - >; the collector of the triode Q3 and the collector of the triode Q1 are both connected with one end of the LED, and the collector of the triode Q2 and the collector of the triode Q4 are both connected with the other end of the LED.
Preferably, the method comprises the following steps: the driving signal DRive1 and the driving signal DRive2 are both driven by a single chip microcomputer, when the driving signal DRive 1/the driving signal DRive2 is at a high level, the corresponding triode is turned on, when the driving signal DRive 1/the driving signal DRive2 is at a low level, the corresponding triode is turned off, and the driving signal DRive1 and the driving signal DRive2 cannot be at the high level at the same time.
Preferably, the method comprises the following steps: when the driving signal DRive1 is 0V, the driving signal DRive2 is 5V, and the driving current of the transistor Q4 is IB _ transistor Q4 (5V-Vbe)/resistor R6.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses the output line only needs two, and the cost reduction control is nimble, and LED animation effect is various.
Drawings
FIG. 1 is a schematic diagram of a circuit structure according to the present invention;
FIG. 2 is a second schematic diagram of the circuit connection of the present invention;
fig. 3 is a schematic diagram of a square wave of the present invention in which the LEDs are fully bright in forward and reverse directions;
FIG. 4 is a schematic diagram of a square wave of the present invention in which LEDs are alternately turned on;
fig. 5 is a schematic diagram of a square wave of the middle LED turning off gradually.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a full-bridge LED driving circuit comprises a voltage positive electrode VO +, a voltage negative electrode VO-, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1, a triode Q2, a triode Q3 and a triode Q4; as shown in fig. 1, the voltage positive electrode VO + and the voltage negative electrode VO-are connected in series with a switch S1, a switch S2, a switch S3 and a switch S4, and the LED1 and the LED2 are connected in reverse parallel.
As shown in fig. 2, a full-bridge LED driving circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q4, and an LED; the base electrode of the triode Q1 is connected with a voltage positive electrode VO + through a resistor R1, the base electrode of the triode Q1 is connected with the collector electrode of the triode Q2 through a resistor R2, and the voltage positive electrode VO + is connected with the emitter electrode of the triode Q1; the base electrode of the triode Q2 is connected with the voltage positive electrode VO + through a resistor R3, and the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1 through a resistor R4; the positive voltage VO + is connected with an emitting electrode of a triode Q2; the DRive signal DRive1 is connected with the base electrode of the triode Q3 through a resistor R5, the DRive signal DRive2 is connected with the base electrode of the triode Q4 through a resistor R6, and the emitter electrode of the triode Q3 and the emitter electrode of the triode Q4 are both connected with the negative voltage VO < - >; the collector of the triode Q3 and the collector of the triode Q1 are both connected with one end of the LED, and the collector of the triode Q2 and the collector of the triode Q4 are both connected with the other end of the LED.
The driving signal DRive1 and the driving signal DRive2 are both driven by a single chip microcomputer, when the driving signal DRive 1/the driving signal DRive2 is at a high level, the corresponding triode is turned on, when the driving signal DRive 1/the driving signal DRive2 is at a low level, the corresponding triode is turned off, and the driving signal DRive1 and the driving signal DRive2 cannot be at the high level at the same time.
1. The LED1 and the LED2 are connected in reverse parallel and then connected at the positions shown in the figure;
2. when the switch tube switch S1 and the switch S4 are turned on, the string LED1 is turned on;
3. when the switch tube switch S2 and the switch S3 are turned on, the string LED2 is turned on;
4. when the LED is fully lighted, the conduction duty ratios of the switch S1, the switch S4, the switch S2 and the switch S3 respectively account for 50 percent, and the conduction time of each period
The 5m switch S is set, so that the rapidly changed light cannot be identified by human eyes, and the human eyes observe the light to be full bright;
5. when the on duty ratio of the switch S1, the switch S4, the switch S2 and the switch S3 is reduced, the brightness of the LED is correspondingly reduced, so that the gradual on and gradual off effects of the LED can be realized by changing the on duty ratio;
as shown in fig. 1, when the switch S1, the switch S4, the switch S2 and the switch S3 are separated from each other by a relatively long time, the effect of flash of stars can be achieved, and the flash is faster as the distance is shorter.
1. The driving signal DRive1 and the driving signal DRive2 are driven by the single chip microcomputer, the corresponding triode is conducted at a high level and is turned off at a low level, the triode and the driving signal DRive1 cannot be simultaneously at the high level, otherwise, four tubes are all conducted, and short circuit damage occurs;
2. the driving signal DRive1 is 0V, the driving signal DRive2 is 5V, and the driving current of the transistor Q4 is IB _ transistor Q4 ═ 5V-Vbe)/resistor R6;
3. the triode Q4 enters saturation conduction, and the collector and emission current of the triode Q4 are Vce;
4. the driving current of the triode Q1 is (voltage negative pole VO-Vce-Vbe)/resistor R2, and the triode Q1 is conducted;
5. the triode Q1 is connected, the triode Q4 is connected, and the LED is connected in the positive direction;
6. similarly, when the DRive signal DRive2 is 0V and the DRive signal DRive1 is 5V, the triode Q2 and the triode Q3 are conducted, and the LED is conducted reversely;
7. the high level time of the driving signal DRive1 and the high level time of the driving signal DRive2 respectively account for 4.8m of switch S, and the LED looks like being totally bright in the forward and reverse directions at the moment because human eyes cannot distinguish the switch S; as shown in fig. 3.
8. The high level time of the driving signal DRive1 and the high level time of the driving signal DRive2 respectively account for 100m of switch S, at the moment, human eyes can distinguish that the switch S is on or off, and the LED looks like that the LED is alternately on in positive and negative directions; as shown in fig. 4.
9. The DRive signal DRive1 rises from the 0m switch S to the 10m switch S within 2 seconds of the high level time of the DRive signal DRive2, and the LED looks like being bright and bright; similarly, the driving signal DRive1 is driven to rise from the 10m switch S to the 0m switch S within 2 seconds of the high level time of the driving signal DRive2, and the LED appears to be turned off gradually when the LED is turned on and off; as shown in fig. 5.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A full-bridge LED drive circuit is characterized in that: the LED lamp comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and an LED; the base electrode of the triode Q1 is connected with a voltage positive electrode VO + through a resistor R1, the base electrode of the triode Q1 is connected with the collector electrode of the triode Q2 through a resistor R2, and the voltage positive electrode VO + is connected with the emitter electrode of the triode Q1; the base electrode of the triode Q2 is connected with the voltage positive electrode VO + through a resistor R3, and the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1 through a resistor R4; the positive voltage VO + is connected with an emitting electrode of a triode Q2; the DRive signal DRive1 is connected with the base electrode of the triode Q3 through a resistor R5, the DRive signal DRive2 is connected with the base electrode of the triode Q4 through a resistor R6, and the emitter electrode of the triode Q3 and the emitter electrode of the triode Q4 are both connected with the negative voltage VO < - >; the collector of the triode Q3 and the collector of the triode Q1 are both connected with one end of the LED, and the collector of the triode Q2 and the collector of the triode Q4 are both connected with the other end of the LED.
2. A full bridge LED driving circuit according to claim 1, wherein: the driving signal DRive1 and the driving signal DRive2 are both driven by a single chip microcomputer, when the driving signal DRive 1/the driving signal DRive2 is at a high level, the corresponding triode is turned on, when the driving signal DRive 1/the driving signal DRive2 is at a low level, the corresponding triode is turned off, and the driving signal DRive1 and the driving signal DRive2 cannot be at the high level at the same time.
3. A full bridge LED driving circuit according to claim 1, wherein: when the driving signal DRive1 is 0V, the driving signal DRive2 is 5V, and the driving current of the transistor Q4 is IB _ transistor Q4 (5V-Vbe)/resistor R6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020472041.1U CN211744802U (en) | 2020-04-03 | 2020-04-03 | Full-bridge type LED driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020472041.1U CN211744802U (en) | 2020-04-03 | 2020-04-03 | Full-bridge type LED driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211744802U true CN211744802U (en) | 2020-10-23 |
Family
ID=72853930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020472041.1U Active CN211744802U (en) | 2020-04-03 | 2020-04-03 | Full-bridge type LED driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211744802U (en) |
-
2020
- 2020-04-03 CN CN202020472041.1U patent/CN211744802U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105120577A (en) | Photo-sensitive control LED (Light Emitting Diode) illuminating lamp | |
| CN211744802U (en) | Full-bridge type LED driving circuit | |
| CN2694695Y (en) | Intelligent high power LED driver | |
| CN210609800U (en) | Self-flashing LED lamp and control circuit thereof | |
| CN104427686A (en) | Lamp and control circuit thereof | |
| CN103068127A (en) | Light-emitting diode (LED) lamp and bicolor LED adjustable light circuit | |
| CN210579360U (en) | Intelligent dimming device for outdoor indicator lamp | |
| CN203151800U (en) | LED luminaire and bi-color LED dimming circuit | |
| CN208768321U (en) | A kind of dimming device and lamps and lanterns | |
| CN102595713B (en) | Frequency-doubling light regulating controller | |
| CN106507545B (en) | Airplane multicolor temperature and brightness adjustable LED illumination intelligent control system | |
| CN2739918Y (en) | Light-operated night lamp | |
| CN201639833U (en) | Switch pulse driving circuit structure adopting constant-current diode with control end | |
| CN220139759U (en) | Nonpolar LED lamp bead, circuit and lamp | |
| CN215581790U (en) | On-off control circuit and system of small night lamp | |
| CN205648088U (en) | Light -operated automatic dimmer circuit | |
| CN213818259U (en) | Dimming circuit and touch panel using same | |
| CN2831543Y (en) | Small night lamp-type switching panel | |
| CN217584148U (en) | Electrodeless lamp string without rectification | |
| CN205232509U (en) | Nine sections LED flashing lights | |
| CN220798586U (en) | LED drive circuit and lighting device | |
| CN221151599U (en) | One-key lamp light system for fishing | |
| CN207460542U (en) | A kind of LED light of quick implementation pattern switching | |
| CN214315688U (en) | LED drive circuit and LED lamp | |
| CN216057561U (en) | LED driving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 311199, 7th Floor, Building 1, No. 587 Kangxin Road, Linping Street, Linping District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Zhongxinli Intelligent Equipment Co.,Ltd. Address before: 5 / F, building 2, 650 WangMei Road, Linping street, Yuhang District, Hangzhou City, Zhejiang Province 311100 Patentee before: HANGZHOU ZHONGXINLI TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |