CN201425219Y

CN201425219Y - High-power LED outdoor lighting lamp

Info

Publication number: CN201425219Y
Application number: CN200920093322XU
Authority: CN
Inventors: 杨树臣; 于彦民; 李晓光; 肖萍萍; 李悦; 范珩; 张风涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-01
Filing date: 2009-04-01
Publication date: 2010-03-17
Anticipated expiration: 2019-04-01

Abstract

A high-power LED outdoor lighting lamp relates to an improvement of an outdoor lighting device. The lighting lamp is characterized in that power supply signals are connected to an input end of a rectifier bridge; the output end of the rectifier bridge is connected with a capacitor and connected to a Vin pin and a GND pin of a constant-current driving chip; a resistor is connected to a Csn pin andthe Vin pin of the constant-current driving chip; a diode is connected with the sw pin and the Vin pin of the constant-current driving chip; two ends of an inductor is connected with the sw pin and the output end of the constant-current driving chip; the dim pin of the constant-current driving chip and a grounding wire are connected with a sensor; the Csn pin of the constant-current driving chip is connected with a positive pole of a power supply; and the other end of the inductor is connected with a negative pole of the power supply. The utility model has the beneficial effects that LED chipnode operating temperature overheating protection is realized, peripheral devices are greatly reduced, the circuit is simpler, the power consumption is lower, the operation is more stable and safer, and the problems of serious light degradation and damage of the high-power LED chip caused by over-high working temperature are solved.

Description

A kind of great power LED outdoor lighting light fixture

Technical field

The utility model belongs to the municipal works technical field, relates to a kind of improvement of outdoor illumination.

Background technology

The LED lighting is as new type light source lighting engineering of new generation, has the little characteristics such as in light weight of efficient electricity-saving, environmental protection, long service life, volume, is particularly suitable for outdoor public illumination field.Though high-power LED lighting fixture can't replace traditional incandescent light fitting and sodium vapor lamp light fixture on a large scale, but along with the appearance of the higher more advanced high-power LED chip of luminous efficiency, the LED lighting necessarily has application more and more widely at aspects such as indoor and outdoor decoration, road lightings.At present, the parameters such as illumination of utilizing high-power LED chip to design and produce outdoor lighting lamp on the China market can have been compared with the energy-saving lamp sodium vapor lamp.At present, the luminous flux of single high-power LED chip of 1W can reach more than the 90lm, utilizes the New LED chip design to make energy-efficient outdoor lighting light fixture at lighting field and is subjected to paying close attention to more widely.Generally can reach in theory under the desirable state more than 100,000 hours the service life of led chip, and in actual use, its luminous efficiency can reduce gradually along with the time, causes its luminous light intensity attenuation (being said light decay).In the application process of led chip, the high-power LED chip of high brightness particularly, the light decay of led light source and the operating temperature of its node have direct relation.Generally speaking, when led chip node operating temperature reaches after 60 ℃, the working life of led chip will reduce even damage greatly, after experiment has proved that led chip node operating temperature surpasses 60 ℃, 5 ℃ of the every increases of its operating temperature, the light decay of led chip can increase by 10%.Therefore, in the process of designing high-power LED lighting, the operating temperature that how to guarantee the led chip node is to guarantee the LED lighting key in service life.

In order better to control the operating temperature of led chip node, people adopt the stronger metal-base circuit plate of heat dispersion, often adopt the aluminium base circuit board to improve the radiating effect of led chip node.But, also be a pith of control led chip node operating temperature to the driving power of led chip.Driving power electric current and voltage job insecurity, can cause the led chip reduction in service life, sometimes even cause led chip to burn, this just greatly reduces the job stability of LED light fixture, and this is the one of the main reasons that do not promote the popularization use in a large number of LED lighting just.

At present, the great power LED constant-current driven chip The Application of Technology time is not long, along with the application of great power LED increases just two trienniums, does not have the so ripe of constant voltage chip development.But adopt the constant current chip design to make led drive circuit, illumination effect is better than constant voltage circuit, and led light source is luminous steadily, flicker free.But constant-current driven chip is technical also is not very ripe, the voltage and current scope is wide not enough, driving power is big not enough, caloric value in the time of chip operation is still than higher, the LED light fixture can appear owing to overheated situation of burning, if the bigger light fixture of power, can not find the chip of coupling, all be that low power chip is more.

Summary of the invention

The purpose of this utility model is: a kind of great power LED outdoor lighting light fixture is provided; it is under the prerequisite that LED lighting radiator area is determined at present; research and design a kind of LED outdoor lighting light fixture with the too high defencive function of temperature; realized function, thereby guaranteed the service life and the job stability of high-power LED lighting fixture the accurate control of led chip node operating temperature.

The technical solution of the utility model is: power supply signal is connected to the input of rectifier bridge; The output of rectifier bridge connects filter capacitor C _In, filter capacitor C _InBe connected to the Vin pin and the GND pin of PT4115 constant-current driven chip; Adjustment resistance R s is connected to the C of PT4115 constant-current driven chip _SnPin and Vin pin; Zener diode D ₅Two ends be connected with the Vin pin with the sw pin of PT4115 constant-current driven chip; The two ends of magnetic balance inductance L are connected with power cathode with the sw pin of PT4115 constant-current driven chip; The dim pin of PT4115 constant-current driven chip is connected with temperature sensor respectively with earth connection, the C of PT4115 constant-current driven chip _SnPin is connected with the positive source of led chip group.

The beneficial effects of the utility model are: great power LED outdoor lighting light fixture has temperature control function, can realize the overtemperature protection of led chip node operating temperature.This product has adopted highly integrated driving chip, can significantly reduce peripheral components, and circuit is simple, and power consumption is lower, more stable work, safety.This product is a kind of multiduty outdoor LED lighting, can be applied in fields such as the illumination of city and backroad, the illumination of residential quarters garden, large-scale plaza lighting.The employing of this technology has solved high-power LED chip and has occurred the problem that light decay is serious and damage owing to operating temperature is excessive.Make the high-power LED lighting fixture job stability that large increase arranged, make prolong energy-conserving and environment-protective more its service life.

Description of drawings

Fig. 1 is the utility model circuit diagram;

Fig. 2 is the utility model lamp body structure figure.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As shown in Figure 1, R is that resistance, D are that diode, C are that electric capacity, L are that inductance, PT4115 are constant-current driven chips.

As shown in Figure 2, the 1st, LED lamp pearl, the 2nd, basic aluminium sheet, the 3rd, radiator, the 4th, temperature sensor.

A point among Fig. 1 and B electricity respectively with Fig. 2 in the e point be connected with the f point, the C point among Fig. 1 is connected with positive source "+" point of led chip group among Fig. 2, the D point among Fig. 1 is connected with power cathode "-" point of led chip group among Fig. 2.

C point among Fig. 1 is connected with positive source "+" point of led chip group among Fig. 2, and the D point among Fig. 1 is connected with power cathode "-" point of led chip group among Fig. 2, and the power supply of current constant is provided for the led chip group.Fig. 2 is the light-source system schematic diagram that adopts the high-power LED chip design.Because these constant-current drive circuit components and parts are fewer, the power consumption of power supply itself is just very little, good operating stability.The numerical value of Rs is determined according to the IF size of current of led light source in Fig. 1 circuit.

E among Fig. 2 and f are the two ends of temperature sensor; this temperature sensor adopts ripple sheet type thermistor; respectively with Fig. 1 in the A point be connected with the B point; detect the operating temperature of led chip node in the light fixture by this thermistor; and detected temperature value is fed back to the DIM control end of PT4115 integrated chip; when temperature meets or exceeds 60 ℃; by the dynamic control of DIM control end realization to the led chip node temperature; thereby realize overtemperature protection to led chip; improve the stability of LED light fixture, prolong the service life of LED light fixture.

Claims

1, a kind of great power LED outdoor lighting light fixture, it is characterized in that: power supply signal is connected to the input of rectifier bridge; The output of rectifier bridge connects filter capacitor C _In, filter capacitor C _InBe connected to the Vin pin and the GND pin of PT4115 constant-current driven chip; Adjustment resistance R s is connected to the C of PT4115 constant-current driven chip _SnPin and Vin pin; Zener diode D ₅Two ends be connected with the Vin pin with the sw pin of PT4115 constant-current driven chip; The two ends of magnetic balance inductance L are connected with power cathode with the sw pin of PT4115 constant-current driven chip; The dim pin of PT4115 constant-current driven chip is connected with temperature sensor respectively with earth connection, the C of PT4115 constant-current driven chip _SnPin is connected with the positive source of led chip group.