CN202135371U - Led lamp - Google Patents
Led lamp Download PDFInfo
- Publication number
- CN202135371U CN202135371U CN201120238211U CN201120238211U CN202135371U CN 202135371 U CN202135371 U CN 202135371U CN 201120238211 U CN201120238211 U CN 201120238211U CN 201120238211 U CN201120238211 U CN 201120238211U CN 202135371 U CN202135371 U CN 202135371U
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- China
- Prior art keywords
- current
- led lamp
- led
- light source
- light sources
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- Expired - Fee Related
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Abstract
The utility model relates to an LED lamp. The Led lamp is characterized by comprising main light source power supply systems, light sources and current limiting modules; the power supply systems are low-voltage power supply systems and the light sources are LED light sources; the current limiting modules comprise two PNP triodes, a pull-up resistor and a current-limiting resistor; and the light sources are LED light sources. The light sources, the triodes and the current-limiting resistors are encapsulated on the same aluminium substrate. The cathode of the LED is controlled by the two triodes and the upper limit of the current is limited by the current-limiting resistor, thereby guaranteeing that the systems work under a required current and ensuring the stabilization of the LED current. The light sources are controlled to light or extinguish through the input of control signals at a control port.
Description
Technical field
The utility model belongs to lighting technical field, and particularly, the LED lamp that the utility model relates to can be for the lighting of low-voltage driving.
Background technology
Known low-voltage lighting light fixture all uses crossing current to drive, and (MCU0 and auxiliary circuit are realized current constant through the micro-control unit.In this LED light fixture, only need voltage to exceed LED series voltage 3V and get final product steady operation, and electric current is limited within the set point.In whole system, use component number to have only 4, compare the crossing current driving of using MCU and omit most of components and parts, improved the stability of system.Moreover this current-limiting circuit can inherit on same aluminium base with LED jointly, saved the space again.
Summary of the invention
The utility model technical problem to be solved is to provide a kind of novel current control circuit, can guarantee the functional reliability of LED lamp.
The utility model solves the problems of the technologies described above the technical scheme that is adopted and is: construct a kind of LED lamp, it is characterized in that, comprise the main light source electric power system; Light source, the current limliting module, said electric power system is low-voltage power supply system; Said light source is led light source; Said current limliting module comprises two PNP triodes, pull-up resistor and current-limiting resistance, and said light source is for being led light source.The light source of telling, triode, current-limiting resistance are encapsulated on the same aluminium base
As the optimal technical scheme of the utility model, voltage can reach current limitation effect above LED lamp series voltage 3V in described charged source.
As the optimal technical scheme of the utility model, the triode of being told (4) is high-power NPN triode
As the optimal technical scheme of the utility model, the triode of being told (5) is a small-power NPN triode
As the optimal technical scheme of the utility model, the current-limiting resistance of being told (6) is a high-power resistance.
Adopt the bright LED control circuit of this law can obtain following beneficial effect:
1, because the LED control circuit of the utility model uses component number few, it is simple to constitute the loop, can guarantee that the stability of system can reduce cost again.
2, be may command because the control of the LED control circuit of the utility model only needs the input pwm signal.Control mode is simple
3, because the LED control circuit of the utility model needs the space minimum, can be integrated in jointly on the same wiring board plate with the lamp pearl, can reduce the volume of system.
Description of drawings:
To combine accompanying drawing and specific embodiment that the utility model is described in detail below, wherein:
Fig. 1 is the circuit theory diagrams of preferred embodiment of the LED lamp of the utility model.
Description of reference numerals.
1, power supply
2, pull-up resistor
3, led light source
4, triode
5, triode
6, current-limiting resistance
7, control port.
Embodiment:
In order to make the purpose of the utility model; Technical scheme and advantage are clearer, below in conjunction with accompanying drawing the utility model are further elaborated, and are to be understood that; Specific embodiment described herein only in order to explain the utility model, does not limit the utility model.
As shown in the figure, in the preferred embodiment of the utility model, the LED lamp comprises light source and restricted portion, and the Lights section is the LED series connection.Restricted portion limits maximum current for triode back-to-back, and in use, supply voltage need exceed LED series voltage 3V and reach maximum to guarantee electric current.Resistance through regulating current-limiting resistance can change the output maximum current.The triode of NPN shown in the figure 4 is a large power triode, can pass through big electric current.When voltage during greater than LED series voltage 3V, electric current just is stabilized in the upper limit is set.Can guarantee the LED operate as normal.
This external control port 7 places input pwm signal can be controlled the light on and off of lamp, can reach dimming effect.
Drive similarly with crossing current of the prior art, the current limliting module can limit the upper limit of electric current.
Claims (7)
1. a LED lamp is characterized in that, comprises the main light source electric power system, light source; The current limliting module, said electric power system is low-voltage power supply system, and said light source is led light source; Said current limliting module comprises two PNP triodes, pull-up resistor and current-limiting resistance, and said light source is for being led light source;
The light source of telling, triode, current-limiting resistance are encapsulated on the same aluminium base.
2. LED lamp according to claim 1 is characterized in that control unit input pwm signal to base stage, can control the light on and off of lamp.
3. LED lamp according to claim 1 is characterized in that triode (4) is the NPN large power triode.
4. LED lamp according to claim 1 is characterized in that triode (5) is the PNP low-power transistor.
5. LED lamp according to claim 1 is characterized in that current-limiting resistance (6) is the 1W high-power resistance.
6. LED lamp according to claim 1 is characterized in that said system need be integrated on the aluminium base.
7. LED lamp according to claim 1 is characterized in that described LED lamp is a high-power light-projecting lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120238211U CN202135371U (en) | 2011-07-07 | 2011-07-07 | Led lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120238211U CN202135371U (en) | 2011-07-07 | 2011-07-07 | Led lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202135371U true CN202135371U (en) | 2012-02-01 |
Family
ID=45524120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120238211U Expired - Fee Related CN202135371U (en) | 2011-07-07 | 2011-07-07 | Led lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202135371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298184A (en) * | 2012-02-27 | 2013-09-11 | 海洋王照明科技股份有限公司 | Single-circuit current-limiting driving double-color LED circuit and LED lamp |
| CN107911903A (en) * | 2017-12-06 | 2018-04-13 | 捷开通讯(深圳)有限公司 | Led drive circuit and mobile terminal |
-
2011
- 2011-07-07 CN CN201120238211U patent/CN202135371U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298184A (en) * | 2012-02-27 | 2013-09-11 | 海洋王照明科技股份有限公司 | Single-circuit current-limiting driving double-color LED circuit and LED lamp |
| CN103298184B (en) * | 2012-02-27 | 2015-10-21 | 海洋王照明科技股份有限公司 | A kind of single channel current limliting drives dual-colored LED circuit and LED lamp |
| CN107911903A (en) * | 2017-12-06 | 2018-04-13 | 捷开通讯(深圳)有限公司 | Led drive circuit and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20130707 |