CN201557281U

CN201557281U - Voltage-reducing protective circuit for semiconductor LED 220v lamp and application structure thereof

Info

Publication number: CN201557281U
Application number: CN2009201608733U
Authority: CN
Inventors: 刘良宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-21
Filing date: 2009-06-21
Publication date: 2010-08-18
Anticipated expiration: 2019-06-21

Abstract

The utility model relates to a voltage-reducing protective circuit for a semiconductor LED 220v lamp and an application structure thereof. The circuit comprises a resistor (R1), a resistor (R2), a capacitor (C2), a resistor (R3), a rectifier bridge formed by common diodes (D1, D2, D3, D4) and an LED set (LED1 and LEDn) formed by serially connecting a plurality of LEDs, wherein the capacitor (C2), the resistor (R3), the LED set from LED1 to LEDn are in parallel connection, and a resistor (R1) is serially connected with the rectifier bridge formed by a power supply access and the common diodes (D1, D2, D3, D4). In a circuit, the LED set (LED1 and LEDn) is used by matching with 12 to 80 serially connected LEDs and the LEDs for an LED cap are arranged in circle or square. A plurality of circuits can be simultaneously placed in one lamp so as to meet the designed luminance demand of the lamp. The utility model has the advantages of simple structure, low cost, reliability, complete function and wide usable range. The utility model can be used in the occasions requiring illumination such as home, office light, toy, ship, communication device, and the like.

Description

A kind of semiconductor LED 220V illuminating lamp step-down protective circuit and application structure

Technical field

The utility model relates to a kind of circuit structure of LED illuminating lamp.

Technical background

The advantage of LED illumination is the high LED process of the luminous efficiency technique improvement of decades, and its luminous efficiency has had bigger lifting.Incandescent lamp, tungsten halogen lamp light efficiency are the 12-24 lumens/watt, fluorescent lamp 50～70 lumens/watt, and sodium vapor lamp 90～140 lumens/watt, most power consumption becomes thermal losses.The LED light efficiency will reach 50～200 lumens/watt after improvement, and the monochromaticjty of its light is good, spectrum is narrow, need not to filter directly to send coloured visible light.At present, the research of LED light efficiency aspect is all stepped up to improve in countries in the world, and its luminous efficiency will have bigger raising in the near future.

0.03～0.06 watt of the few LED single tube power of power consumption adopts DC driven, 1.5～3.5 volts of single tube driving voltages, and 15～18 milliamperes in electric current, reaction speed is fast, can be at high-frequency operation.Under the situation of same illuminating effect, power consumption is 1/8th of incandescent lamp bulb, fluorescent tube 1/2nd, Japan estimates, substitutes half incandescent lamp and fluorescent lamp of Japan as adopting light efficiency than the LED of the taller twice of fluorescent lamp.Can save every year and be equivalent to 6,000,000,000 liters of crude oil.With regard to Bridge guardrail lamp example, more than 40 watt of a fluorescent lamp of effect same, and adopt the power of every of LED to have only 8 watts, and can seven color variations.

Long service life adopts electronics light field radioluminescence, and filament light-emitting is shortcomings such as burning, heat deposition, optical attenuation easily.And adopt the LED lamp body long-pending little, in light weight, and epoxy encapsulation, can bear high-strength mechanical impacts and shakes, and is difficult for broken.Average life span reaches 100,000 hours.The LED light fixture can reach more than 5～10 years useful life, can reduce the maintenance cost of light fixture greatly, avoids often changing the hardship of lamp.

The strong caloric value of security reliability is low, non-thermal radiation, cold light source, can support safely and touch: can accurately control light type and lighting angle, photochromic soft, free from glare; Not mercurous, sodium element etc. may health risk material.

Helping environmental protection LED is the total solids luminous element, shatter-proof, shock-resistant difficult fragmentation, and discarded object is recyclable, does not pollute.The light source volume is little, can arbitrary combination, and easy exploiting becomes light thin short and small type illuminating product, also is convenient to installation and maintenance.Certainly, energy-conservation is the main reason that we consider to use led light source, and perhaps led light source is still used the investment of the energy-conservation withdrawal light source of one-year age than conventional light source costliness, thereby obtains several times the energy-conservation net profit phase of every year in 4～9 years.

The used circuit of supplying on the existing market of LED light fixture adds rectification circuit by traditional resistance-capacitance depressurization and forms, performance protection imperfection, and the electric light conversion ratio is low, damages easily, the employing IC constant-current source circuit that has, the complicated cost of electric current improves.

The utility model content

The purpose of this utility model is that a kind of step-down rectifier that is used for semiconductor 220V LED lamp of design is protected in one; have simple in structure, cost is low, dependable performance, perfect in shape and function, characteristics that the scope of application is wide, can be used for comprising the occasion of needs proofs such as family expenses and office lighting light fixture, toy, car and boat and communication equipment.

The utility model is realized with following technical scheme: as figure one, this circuit comprises resistance (R1) resistance (R2), electric capacity (C2) resistance (R3), general-purpose diode (D1, D2, D3, D4) light-emitting diode group formed of the rectifier bridge of Zu Chenging and a plurality of light-emitting diode (LED1, LEDn), the Light-Emitting Diode group (LED1 of resistance (R4) and a plurality of Light-Emitting Diode composition, LEDn) series connection, electric capacity (C2) and resistance (R3) and light-emitting diode group LED1 to LEDn parallel connection, resistance (R1) series connection power path and general-purpose diode (D1, D2, D3, D4) rectifier bridge of Zu Chenging links to each other.(1) anti-switch lamp rush of current: 75 ohm of fixed carbon resisters of resistance R 1 value, the effect of splitting electricity moment buffering is very obvious, can weaken the influence of peaking voltage to back level element, there is not the circuit stability of R1 to decline to a great extent, it is serious that the easy problem that occurs is opened electric momentary arcing exactly, and moment is burnt LED.R1 also is equal to simultaneously an insurance, and the short-circuit fault appears in the back level, can fuse voluntarily, is unlikely to harm is related to wider, this shows that the circuit that does not have R1 also is unsafe!

(2) prevent that high pressure from impacting LED: resistance R 2 is generally selected 100 ohm of-680 ohm/1W for use, act as step-down output buffering, can prevent that high pressure from directly impacting LED, also can be used for shunting or current limliting during multichannel.

(3) prevent instantaneous pressure moment formation: capacitor C 2 is selected 10uf/400V or 10uf/250V electrochemical capacitor for use, the moment circuit of turning on light gives the electric capacity two ends charging interval very important, capacitance is big, high pressure can't form rapidly at the electric capacity two ends, thereby avoided the formation of instant high-voltage, thereby avoided damage LED buffer circuit and LED.

(4) closing the surplus light of electricity back LED lamp eliminates: R3; 10K-1M/0.25W resistance; for false load is exported in step-down; circuit of output terminal overcurrent when preventing the circuit zero load; the electrochemical capacitor both end voltage of can releasing the end time simultaneously, the surplus light after avoiding turning off the light is detained for a long time, the words that value is less; can also prevent that LED moment from adding piezoelectric voltage and raising, LED! adequately protects

Compared with the prior art; the utility model is a kind of 220V conversion LED power supply circuits that multiple protective is an one that collect; circuit structure is simple; the use element is few; cost is low; dependable performance, the scope of application is wide, can be widely used in the occasion of proof such as the needs that comprise family expenses and office lighting light fixture, toy, car and boat and communication equipment.

Description of drawings

Fig. 1 is the utility model circuit theory diagrams

Embodiment

1, with reference to accompanying drawing as can be known, in the utility model circuit, this circuit comprises resistance (R1) resistance (R2), electric capacity (C2) resistance (R3), general-purpose diode (D1, D2, D3, D4) light-emitting diode group formed of the rectifier bridge of Zu Chenging and a plurality of light-emitting diode (LED1, LEDn), the Light-Emitting Diode group (LED1 of resistance (R4) and a plurality of Light-Emitting Diode composition, LEDn) series connection, electric capacity (C2) and resistance (R3) and light-emitting diode group LED1 to LEDn parallel connection, resistance (R1) series connection power path and general-purpose diode (D1, D2, D3, D4) rectifier bridge of Zu Chenging links to each other.Used resistance R 1 fixed carbon resister, the effect of splitting electricity moment buffering is very obvious, can weaken the influence of peaking voltage to back level element, does not have the circuit stability of resistance R 1 to decline to a great extent, it is serious that the easy problem that occurs is opened electric momentary arcing exactly, and moment is burnt LED.Resistance R 1 also is equal to an insurance simultaneously, and the short-circuit fault appears in the back level, can fuse voluntarily, is unlikely to harm is related to wider, this shows that the circuit that does not have R1 also is unsafe! Resistance R 2 act as step-down output buffering, can prevent that high pressure from directly impacting LED, also can be used for shunting or current limliting during multichannel.The moment circuit of turning on light gives the 2 two ends charging intervals of capacitor C very important, capacitance is big, high pressure can't form rapidly at the electric capacity two ends, thereby avoided the formation of instant high-voltage, thereby avoided the damage to LED buffer circuit and LED, this electric current is generally selected the 4.7--10uf/400V electrochemical capacitor for use; Resistance R 3 is exported false load for step-down, circuit of output terminal overcurrent when preventing the circuit zero load, the electrochemical capacitor both end voltage of can releasing the end time simultaneously; surplus light after avoiding turning off the light is detained for a long time; value is less, can also prevent that LED moment from adding piezoelectric voltage and raising, and LED! adequately protects

When the utility model was implemented in specific design, used capacitor C 1, the value of resistance R 4 needed to carry out the choose reasonable coupling according to the quantity of LED in the aforementioned functional, just can reach the design's best requirement.

2, application structure, the utility model, supporting LED12-80 single LED connects and uses, and the used LED of LED Lamp cup adopts circular arrangement or square arrangement, and according to the size of light fixture, the 220V change-over circuit is made separately or is integrated on the same circuit board with the LED Lamp cup.

Application example

1. the design's practical application comprises the occasion of needs proofs such as family expenses and office lighting light fixture, toy, car and boat and communication equipment, and is effective, perfect in shape and function.

2. the design is by developing, and can also be used for the conversion power supply circuits of various power voltage supplies such as 110V for example.

3.LED the fixed form of the arrangement of lamp and Lamp cup circuit also can develop multiple shape and method.

4. many these unit place a light fixture to reach the brightness requirement of Design of Luminaires simultaneously.

Claims

1. semiconductor LED 220V illuminating lamp step-down protective circuit and application structure; it is characterized in that: this circuit comprises resistance (R1) resistance (R2); electric capacity (C2) resistance (R3); general-purpose diode (D1; D2; D3; D4) light-emitting diode group formed of the rectifier bridge of Zu Chenging and a plurality of light-emitting diode (LED1, LEDn), the Light-Emitting Diode group (LED1 of resistance (R4) and a plurality of Light-Emitting Diode composition; LEDn) series connection; electric capacity (C2) and resistance (R3) and light-emitting diode group LED1 to LEDn parallel connection, resistance (R1) series connection power path and general-purpose diode (D1, D2; D3, D4) rectifier bridge of Zu Chenging links to each other.

2. semiconductor LED 220V illuminating lamp step-down protective circuit according to claim 1 is characterized in that resistance in the described circuit (R1) is fixed carbon resister.

3. semiconductor LED 220V illuminating lamp step-down protective circuit according to claim 1 is characterized in that electric capacity in the described circuit (C2) is electrochemical capacitor.

4. according to claim 1 or 2 or 3 described circuit, it is characterized in that, and the light-emitting diode group in the circuit (LED1, LEDn) supporting 12-80 single LED series connection used, and the used LED of LED Lamp cup adopts circular arrangement or square arrangement.

5. circuit according to claim 4 is characterized in that and can place a light fixture to reach the brightness requirement of Design of Luminaires simultaneously by a plurality of circuit.