CN206260104U - Adjustable diode constant current driving device - Google Patents
Adjustable diode constant current driving device Download PDFInfo
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- CN206260104U CN206260104U CN201621192383.8U CN201621192383U CN206260104U CN 206260104 U CN206260104 U CN 206260104U CN 201621192383 U CN201621192383 U CN 201621192383U CN 206260104 U CN206260104 U CN 206260104U
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- diode
- triode
- adjustable
- constant current
- resistance
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Abstract
The utility model is related to light fixture actuation techniques field, a kind of adjustable diode constant current driving device is provided, the device includes AC DC modules, adjustable resistance, triode and diode, the colelctor electrode of triode is connected with the negative pole of diode, the base stage of triode is connected with one end of adjustable resistance, and the other end of adjustable resistance is connected with the output end of AC DC modules, the positive pole of diode.The utility model proposes technical scheme radiating it is small, it is efficiency high, safe and reliable, and do not influence the Electro Magnetic Compatibility of whole lamp.
Description
Technical field
The utility model belongs to light fixture actuation techniques field, and more particularly to a kind of adjustable diode constant current drives dress
Put.
Background technology
At present, for AC220V (50Hz) circuit, requirement very high is proposed to dimming LED lamp.In some Code in Hazardous Special Locations,
Also need to meet the requirement such as harsh environment, use requirement and electromagnetic compatibility.
In dimming LED lamp design, realizing the mode of light modulation has various.Can be divided into traditional thyristor regulating by dimming mode
Light, simulation light modulation and digital PWM light modulation.Can be divided into primary light modulation and secondary light modulation again by the classification of circuit and constant pressure drives and adjusts
Light, constant current drive light modulation etc..Although different dimming modes can be applied to different places.But traditional controllable silicon light modulation is applied to
LED lamp is simultaneously uncoordinated, it is contemplated that situations such as environmental suitability is with security, reliability, often circuit is extremely complex, is unfavorable for
Design is used.Digital P WM is generally used for larger illuminator, is supported the use with controller, is not suitable for lighting environment simple
And low power LED lamp.In addition, in AC220V (50Hz) circuit, primary dimming mode has high requirements to security, because
This is typically chosen in secondary light modulation.
The dimming mode of existing low-power LED lamp is broadly divided into simulation light modulation and PWM dims two ways.Simulation light modulation
It is divided into primary simulation light modulation and secondary analog light modulation again.Constant pressure can be also divided into drives light modulation to drive light modulation with constant current.
PWM light modulations need to design control module, both increase cost, and Miniaturization Design is unfavorable for again.Primary light modulation is normally applied
It is general in electric main circuit to be dimmed using secondary in DC low-voltage circuit.The mode of secondary light modulation has a lot, and summary is got up
It is exactly that AC-DC constant voltage circuits add DC-DC circuit.Because LED is current driving apparatus, drive circuit need to be designed as constant current and drive electricity
Road, could ensure LED service lifes.AC-DC constant voltage circuits add DC-DC circuit for two-stage circuit, and number of elements is more, both influences
Whole lamp reliability, the again whole lamp efficiency of influence, and contour structures is not easy to do small, it is difficult to reduces cost.
Utility model content
【The technical problem to be solved】
The purpose of this utility model is to provide a kind of adjustable diode constant current driving device, at least to solve above skill
One of art problem.
【Technical scheme】
The utility model is achieved through the following technical solutions.
The utility model is related to a kind of adjustable diode constant current driving device, including AC-DC module, adjustable resistance,
Triode and diode, the colelctor electrode of the triode are connected with the negative pole of diode, the base stage and adjustable electric of the triode
One end connection of resistance, the other end of the adjustable resistance is connected with the positive pole of the output end of AC-DC module, diode.
As it is a kind of preferred embodiment, also including the resistance connected with adjustable resistance, one end of the resistance and AC-
The output end connection of DC modules, the other end of the resistance is connected with the positive pole of one end of adjustable resistance, diode.
Used as another preferred embodiment, also including electric capacity, one end of the electric capacity is connected with the base stage of triode,
The other end ground connection of the electric capacity.
【Beneficial effect】
The utility model proposes technical scheme have the advantages that：
The element that the utility model is matched with AC-DC module by selection, have devised high accuracy, low-loss 0~
100% Zooming light modulation circuit, whole triode light adjusting circuit loss is less than 0.1W, and radiate small, efficiency high, safe and reliable, and not
Whole lamp Electro Magnetic Compatibility is influenceed, in addition, present apparatus simple structure, the influence to original circuit structure is smaller, and cost is small.This practicality
The adjustable constant current driver circuit for LED of new utilization triode Current amplifier principle design, can be widely used in dimming LED lamp
Tool.
Brief description of the drawings
Fig. 1 is the circuit theory of adjustable diode constant current driving device that embodiment of the present utility model is provided
Figure.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage clearer, below will be to of the present utility model specific
Implementation method carries out clear, complete description.
Fig. 1 is the circuit theory diagrams of adjustable diode constant current driving device that the utility model embodiment one is provided.
As shown in figure 1, the device includes AC-DC module U1, resistance R1, adjustable resistance R2, triode Q1, diode D1 and electric capacity C1,
The colelctor electrode of triode Q1 is connected with the negative pole of diode D1, the base stage of triode Q1 and adjustable end, the electric capacity of adjustable resistance R2
One end connection of C1 a, fixing end of adjustable resistance R2 is connected with one end of resistance R1, the other end and the AC-DC moulds of resistance R1
The positive pole connection of the output end, diode D1 of block U1.The other end of electric capacity C1, the grounded emitter of triode Q1.
Pressure drop and Current amplifier principle of the utility model using the PN junction stabilization of triode Q1, AC-DC module is exported
Voltage, electric current be depressured by triode Q1, constant current driving is carried out to diode D1.The electric current for flowing through diode D1 can pass through
The adjustable resistance R2 of the base stage of triode Q1 changes in real time.The change of triode Q1 base currents, by putting for triode Q1
Greatly, the colelctor electrode in triode Q1 forms the β times of electric current of (β is multiplication factor).Due between transistor base and emitter stage
Pressure drop is stablized relatively, and base current is small, low in energy consumption, and design has obtained high-precision step-less adjustment constant-current drive circuit, and it is fitted
For small-power dimming LED lamp.Relative to other more complicated light adjusting circuits, this circuit is simple and convenient, safe and reliable, it is easy to
Design production.
As can be seen from the above embodiments, the element that the utility model embodiment is matched by selection and AC-DC module,
High accuracy, low-loss 0~100% Zooming light modulation circuit are have devised, whole triode light adjusting circuit loss is less than 0.1W, dissipates
Hot small, efficiency high, it is safe and reliable, and whole lamp Electro Magnetic Compatibility is not influenceed, in addition, present apparatus simple structure, to original circuit knot
The influence of structure is smaller, and cost is small.The utility model drives electricity using the adjustable LED constant current of triode Current amplifier principle design
Road, can be widely used in dimming LED lamp.
It is to be appreciated that embodiments described above is a part of embodiment of the present utility model, rather than whole embodiments,
Nor to limitation of the present utility model.Based on embodiment of the present utility model, those of ordinary skill in the art are not paying wound
The every other embodiment obtained under the premise of the property made work, belongs to protection domain of the present utility model.
Claims (3)
1. a kind of adjustable diode constant current driving device, it is characterised in that including AC-DC module (U1), adjustable resistance
(R2), triode (Q1) and diode (D1), the colelctor electrode of the triode (Q1) is connected with the negative pole of diode (D1), described
The base stage of triode (Q1) is connected with one end of adjustable resistance (R2), the other end and AC-DC module of the adjustable resistance (R2)
(U1) the positive pole connection of output end, diode (D1), the grounded emitter of the triode (Q1).
2. adjustable diode constant current driving device according to claim 1, it is characterised in that also including with adjustable electric
The resistance (R1) of resistance (R2) series connection, one end of the resistance (R1) is connected with the output end of AC-DC module (U1), the resistance
(R1) the other end is connected with one end of adjustable resistance (R2), the positive pole of diode (D1).
3. adjustable diode constant current driving device according to claim 1, it is characterised in that also including electric capacity (C1),
One end of the electric capacity (C1) is connected with the base stage of triode (Q1), the other end ground connection of the electric capacity (C1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621192383.8U CN206260104U (en) | 2016-10-28 | 2016-10-28 | Adjustable diode constant current driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621192383.8U CN206260104U (en) | 2016-10-28 | 2016-10-28 | Adjustable diode constant current driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206260104U true CN206260104U (en) | 2017-06-16 |
Family
ID=59025720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621192383.8U Active CN206260104U (en) | 2016-10-28 | 2016-10-28 | Adjustable diode constant current driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206260104U (en) |
-
2016
- 2016-10-28 CN CN201621192383.8U patent/CN206260104U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 621000 Mianyang city of Sichuan Province Branch Chong Park Jiuzhou International Software Park Patentee after: Sichuan Jiuzhou Optoelectronics Technology Co., Ltd. Address before: International Software Park of Chengdu City Jiuzhou Branch Chong Park of Sichuan province 621000 Patentee before: Sichuan Jiuzhou Optoelectronics Technology Co., Ltd. |
|
| CP02 | Change in the address of a patent holder |