CN201541369U

CN201541369U - Driver of 5-100 LEDs serially connected

Info

Publication number: CN201541369U
Application number: CN200920181210XU
Authority: CN
Inventors: 林文献
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-06
Filing date: 2009-11-06
Publication date: 2010-08-04
Anticipated expiration: 2019-11-06

Abstract

The utility model relates to a driver of 5-100 LEDs serially connected, which is formed by sequentially connecting a mains supply, a capacitor constant current circuit, a current-limiting current-stabilizing circuit, a switch circuit and an LED serial loop in series, wherein the switch circuit is controlled by a pulse generator which is supplied power by a step-down voltage-stabilizing filter circuit through the mains supply. The pulse generated by the pulse generator controls the switch circuit to be connected or disconnected according to pulse duty ratio rhythm, the LEDs alternatively lightens and go out so as to adjust the pulse duty ratio, thus leading human eyes to be unware of the continuous false images formed by alternative on-off of the LEDs, and further achieving the purpose of saving energy.

Description

5-100 LED series driver

Technical field:

The utility model belongs to the cold light source lighting field, particularly a kind of driver that drives 5-100 series LED.

Background technology:

Utilize the LED series loop to be applied to point duty traffic lights, billboard, soft lamp band, the guardrail fluorescent tube has had the more than ten years.Have a LED damage to extinguish in the loop if still exist for a long time, extinguish in then whole loop, can't continue to light, and maintenance is searched pretty troublesome; Two,, must accurately calculate series LED number in this loop according to the magnitude of voltage of the working power of LED series loop, and can only be more than result of calculation, and can not lack, otherwise can puncture LED, short circuit appears.Existing product is means with the sacrificing luminance often, and the pressure drop that reduces every LED guarantees the safe operation in this loop.

Summary of the invention:

To be that design is a kind of both can satisfy LED and changed in some the purpose of this utility model, and can reach the LED series driver of LED nominal brightness.

Technical solutions of the utility model are achieved in that a kind of 5-100 LED series driver, it is characterized in that forming by civil power, electric capacity constant-current circuit, current limliting current stabilization circuit, switching circuit and LED series loop series connection successively, switching circuit is controlled by pulse generator, and pulse generator is powered through the lowering and stabilizing blood pressure filter circuit by civil power.The pulse control switch circuit that pulse generator produces is according to pulse duty factor rhythm break-make, and LED produces to light and extinguish and hockets, the regulating impulse duty ratio, and the light on and off that make human eye not perceive LED replace.

The utlity model has reasonable in design, utilize the switching circuit in the drive circuit, control LED series loop is worked under the break-make environment, guarantee LED series loop of short duration work under the higher voltage environment, reach the requirement of nominal brightness, of short duration outage avoids the LED temperature rise too high, prolongs the useful life of LED, and satisfies the variation arbitrarily in 5 to 100 super wide ranges of LED number; The bright rhythm that puts out of duty ratio may command LED of regulating impulse makes human eye subtle, forms continuous illusion, reaches energy-conservation purpose with this.

Description of drawings:

Below in conjunction with concrete legend the utility model is described further:

Figure 15-100 series driver theory diagram

Figure 25-100 series driver circuit diagram

Figure 35-100 series driver circuit diagram two

The application circuit of Fig. 4 LED series loop conversion color lamp

Embodiment:

With reference to Fig. 1, a kind of 5-100 LED series driver, it is formed by civil power, electric capacity constant-current circuit, current limliting current stabilization circuit, switching circuit and LED series loop series connection successively, switching circuit is controlled by pulse generator, it also is the break-make of pulse generator output control switch circuit, pulse generator through the power supply of lowering and stabilizing blood pressure filter circuit, is perhaps supplied with the pulse generator working power by the output of electric capacity constant-current circuit through the lowering and stabilizing blood pressure filter circuit by civil power.

See figures.1.and.2, each modular circuit of 5-100 LED series driver form and the workpiece principle as follows:

1, electric capacity constant-current circuit: by piezo-resistance RV, capacitor C 1, bleeder resistance R1, bridge rectifier ZL1, capacitor C 2 are formed.Piezo-resistance RV is attempted by civil power input two ends, and capacitor C 1 is serially connected between civil power and bridge rectifier ZL1, and bleeder resistance R1 is attempted by capacitor C 1 two ends, and capacitor C 2 is attempted by bridge rectifier ZL1 output two ends and strobes.The civil power input also meets piezo-resistance RV, prevent that surge voltage from entering, but protective circuit is not damaged; Through capacitor C 1 constant current, resistance R 1 is as after releasing, prevent that power supply from disconnecting, and input still keeps high pressure and the electric shock personnel; Export unloaded 310V direct voltage through bridge rectifier ZL1, capacitor C 2 filtering, for K series loop working power.

2, current limliting current stabilization circuit: form by resistance R 6, thermistor PTC.Resistance R 6, thermistor PTC are connected on major loop promptly and between the load LED series loop, and it can effectively prevent to uprush because of the input of utility grid surge voltage causes electric current, guarantees that simultaneously there is more rational working current value in the LED loop.

3, switching circuit: field effect transistor is born.Add to the grid of pipe Q from the very narrow high level pulse of the output pulse width of integrated circuit (IC), the Q conducting is managed in the field, thereby makes the power supply current supply circuit closure of LED series loop, and then the LED series loop is because of getting electric lighting.When pulse is a low level, then LED extinguishes.

4, LED series loop: be in series by N LED, wherein 5≤N≤100.The LED number is in series from minimum 5 to maximum 100, forms the LED series loop and is installed between current limliting current stabilization circuit and the switching circuit as load.

5, lowering and stabilizing blood pressure filter circuit: by resistance R 2,3 one-tenth of voltage stabilizing didoe DW, capacitor C.By electric capacity constant-current circuit rectifying and wave-filtering output 310V direct voltage, reduce through resistance R 2, voltage stabilizing didoe DW voltage stabilizing, capacitor C 3 filtering output 12V voltage stabilizing, and as the pulse generator working dc power.

6, pulse generator: form by model C D4069 integrated circuit (IC), resistance R 3, R4, R5, capacitor C 4 and diode D1, D2.Six not gates of integrated circuit (IC), by not gate a, b and starting resistance R3, EDM Generator of Adjustable Duty Ratio timing resistor R4, diode D1, resistance R 5, diode D2 form time-base circuit, if resistance R 5＞＞R4, timing capacitor C4 fixes, then burst pulse is exported in vibration, not gate C paired pulses Schmidt shaping, and not gate d, e, f composition carry out paraphase output to the shaping afterpulse.

With reference to Fig. 2, lowering and stabilizing blood pressure filter circuit input directly connects civil power in this circuit diagram, and it need increase a bridge rectifier ZL2 and and be serially connected in decompression capacitor C5 between civil power and bridge rectifier ZL2, can reach the purpose of supplying with the pulse generator power supply equally.

With reference to Fig. 4, the application circuit of LED series loop conversion color lamp, because foregoing circuit provides the loop that can drive 5 to 100 series LEDs, in this series loop, as long as keep at least 5 LED not controlled by external signal, other 95 all can be controlled by external circuit with interior LED, realize style conversion such as " flowing water ", and color combinations.Colour derives from LED individual choice different colours, and by the sequence arrangement that designs.External circuit control is as Fig. 4, select the series LED two ends of local synchronization to be attempted by between the collector and emitter of triode BG, the base stage of triode connects the 12V working power behind the phototriode in thyristor Q, light-emitting diode connects style figure signals such as " flowing water " in the thyristor, and thyristor Q plays a part to the isolating exterior circuit.During work, external signal input, the thyristor action, triode BG conducting, its collector electrode and emitter conducting are attempted by the LED formation " short circuit " at its two ends and extinguish; Otherwise triode BG ends, and promptly LED lights.

Claims

1. 5-100 LED series driver, it is characterized in that forming by civil power, electric capacity constant-current circuit, current limliting current stabilization circuit, switching circuit and LED series loop series connection successively, switching circuit is controlled by pulse generator, and pulse generator is powered through the lowering and stabilizing blood pressure filter circuit by civil power.

2. 5-100 LED series driver according to claim 1 is characterized in that lowering and stabilizing blood pressure filter circuit input is connected on the output of electric capacity constant-current circuit.

3. 5-100 LED series driver according to claim 1, it is characterized in that electric capacity department current circuit is by piezo-resistance RV, capacitor C 1, bleeder resistance R1, bridge rectifier ZL1, capacitor C 2 are formed, piezo-resistance RV is attempted by civil power input two ends, capacitor C 1 is serially connected between civil power and bridge rectifier ZL1, bleeder resistance R1 is attempted by capacitor C 1 two ends, and capacitor C 2 is attempted by bridge rectifier ZL1 output two ends and strobes.