CN201267026Y

CN201267026Y - Drive circuit of mixing light source

Info

Publication number: CN201267026Y
Application number: CNU2008202013909U
Authority: CN
Inventors: 涂道平; 李春海; 覃渊华; 温华远; 何开辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-06
Filing date: 2008-10-06
Publication date: 2009-07-01
Anticipated expiration: 2018-10-06

Abstract

The utility model discloses a drive circuit of a mixed light source, which comprises a power input terminal and a light source load unit, wherein, the circuit comprises an LED constant voltage and constant current drive unit and a low voltage lamp drive unit which are mutually connected in parallel; the circuit can simultaneously adopt an LED light source with low-voltage superhigh lightness and long service and a sodium lamp light source with high penetration, low temperature and high lightness, and the circuit reasonably match and mix the two light sources and can control the lightness, a soft sunlight-imitated light wave with high lightness is formed jointly by the two light sources, the sunlight-imitated light wave can embody the natural color of views, is especially suitable for street illumination and good for protecting the eyes of pedestrians and drivers, thus being widely used for the illumination systems of beauty spots of public parks, garden squares or streets.

Description

The hybrid light source drive circuit

Technical field

The utility model relates to a kind of light source driving circuit, the drive circuit of particularly a kind of low-pressure sodium lamp and LED hybrid light source.

Background technology

Be used for the illumination of public place at night at present, generally all adopt low pressure sodium light pipe as light source.Though the luminous intensity of low pressure sodium light pipe is very high, but the yellow light wave of its dullness makes it be subjected to the restriction of environment for use, for example scenic spot, park, senior villa district, square, garden or road lighting etc., and dull yellow light wave has twisted the realistic colour of scenery, even can cause the tired of pedestrian's eyes, especially be unfavorable for passing driver's vehicle drive; And if adopt the LED illumination, because LED is a white light, penetration power is not strong, is not suitable for the use of public place.

Summary of the invention

At above-mentioned deficiency, the purpose of this utility model is to provide a kind of hybrid light source drive circuit in conjunction with low-pressure sodium lamp and LED illumination, can be used for providing simultaneously the light source of low-pressure sodium lamp and LED illumination.

The utility model is that the technical scheme that its problem of solution is adopted is:

The hybrid light source drive circuit comprises power input and light source load unit, and wherein, circuit comprises LED constant pressure and flow driver element parallel with one another and low-pressure lamp driver element;

As the further improvement of such scheme, described LED constant pressure and flow driver element comprises the LED load unit, be connected the LED driver element between power input and the LED load unit positive pole and be connected error protection unit between LED load unit negative pole and the output;

As the further improvement of such scheme, described LED driver element adopts the AMC3202 drive IC; Described error protection unit adopts the A705 drive IC;

As the further improvement of such scheme, described error protection unit comprises first, second voltage stabilizing didoe, and the positive pole of described first, second voltage stabilizing didoe connects the A705 drive IC.

In addition, driver element, the rectification unit of boosting of between power input and low-voltage lamp load unit, successively connecting, input has a high-frequency driving voltage between rectification unit and low-voltage lamp load unit; Be connected with Overvoltage protecting unit between driver element and the rectification unit boosting, between low-voltage lamp load unit and high-frequency driving voltage, also be connected with the load abnormal protected location;

As the further improvement of such scheme, the described driver element that boosts adopts 3525 drive IC; Described rectification unit adopts the IR2520 drive IC;

And described high-frequency driving voltage is 400V.

The beneficial effects of the utility model are: the hybrid light source drive circuit can adopt the low pressure super brightness simultaneously; long-life led light source with penetrate the dynamics height; low temperature; the sodium vapor lamp light source of high brightness; and with two kinds of reasonably combined mixing of light source; the may command luminous intensity; common form a kind of soft and have an imitative daylight light wave of high brightness; imitative daylight light wave can embody the scenery true qualities; and be particularly suitable for road lighting; help protecting pedestrian or vehicle driver's eyes, the utility model can extensively be used in the scenic spot, park; the illuminator of square, garden or road lighting.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the schematic block circuit diagram of the utility model hybrid light source drive circuit;

Fig. 2 is the circuit diagram of the utility model LED constant pressure and flow drive circuit;

Fig. 3 is the circuit diagram of the utility model low-pressure lamp drive circuit.

Embodiment

With reference to the hybrid light source drive circuit of Fig. 1, comprise power input and light source load unit, it is characterized in that: described circuit comprises LED constant pressure and flow driver element parallel with one another and low-pressure lamp driver element.

With reference to Fig. 2; as preferred implementation of the present utility model; LED constant pressure and flow driver element has the DC input voltage vin; voltage stabilizing didoe D1～D2; diode D3; resistance R 1～R4; anti-interference capacitor C0～the C6 of ground connection; and by the AMC3202 drive IC connection load LED1～LED4 of series connection successively; certainly; the LED load can be adjusted specification and quantity according to operating position; in addition; also be connected to the A705 drive IC and the first voltage stabilizing didoe D1 at the LED negative pole; the error protection unit that the second voltage stabilizing didoe D2 connects into is to ensure circuit safety; wherein; the anodal FB pin that connects AMC3202 of the first voltage stabilizing didoe D1, the anodal A705 negative voltage power supply that connects of the second voltage stabilizing didoe D2.

With reference to Fig. 3, as preferred implementation of the present utility model, described low-pressure lamp driver element comprises low-voltage lamp load LIGH, boost driver element, rectification unit of series connection successively between power input and low-voltage lamp load unit, importing between rectification unit and low-voltage lamp load unit has a high-frequency driving voltage; Be connected with Overvoltage protecting unit between driver element and the rectification unit boosting, between low-voltage lamp load unit and high-frequency driving voltage, also be connected with the load abnormal protected location,, wherein, the described driver element that boosts preferably adopts 3525 drive IC; Described rectification unit preferably adopts the IR2520 drive IC, and described high-frequency driving voltage is preferably 400V; The low-pressure lamp driver element has the DC input voltage of driving 3525, capacitor C 101～C114, resistance R 101～R117, inductance L 101, galvanic couple T101, T1, diode D101～D108 and the field effect transistor M101～M104 of cooperation 3525 and IR2520.

Certainly; LED driving and low-pressure sodium lamp drive circuit are varied; and foregoing circuit is a preferred implementation of the present utility model; be not considered as protection range of the present utility model; so long as adopt the circuit that the LED constant pressure and flow drives and low-pressure sodium lamp drives simultaneously, all belong to protection range of the present utility model.

Claims

1, hybrid light source drive circuit comprises power input and light source load unit, it is characterized in that: described circuit comprises LED constant pressure and flow driver element parallel with one another and low-pressure lamp driver element.

2, hybrid light source drive circuit according to claim 1 is characterized in that: described LED constant pressure and flow driver element comprises the LED load unit, be connected the LED driver element between power input and the LED load unit positive pole and be connected error protection unit between LED load unit negative pole and the output.

3, hybrid light source drive circuit according to claim 2 is characterized in that: described LED driver element adopts the AMC3202 drive IC; Described error protection unit adopts the A705 drive IC.

4, hybrid light source drive circuit according to claim 2; it is characterized in that: described error protection unit comprises first, second voltage stabilizing didoe (D1, D2); the anodal FB pin that connects AMC3202 of described first voltage stabilizing didoe (D1), the positive pole of second voltage stabilizing didoe (D2) connects A705 drive IC negative voltage source.

4, hybrid light source drive circuit according to claim 1, it is characterized in that: described low-pressure lamp driver element comprises the low-voltage lamp load unit, boost driver element, rectification unit of series connection successively between power input and low-voltage lamp load unit, importing between rectification unit and low-voltage lamp load unit has a high-frequency driving voltage; Be connected with Overvoltage protecting unit between driver element and the rectification unit boosting, between low-voltage lamp load unit and high-frequency driving voltage, also be connected with the load abnormal protected location.

5, hybrid light source drive circuit according to claim 4 is characterized in that: the described driver element that boosts adopts 3525 drive IC; Described rectification unit adopts the IR2520 drive IC.

6, hybrid light source drive circuit according to claim 4 is characterized in that: described high-frequency driving voltage is 400V.