CN105636308A

CN105636308A - Wireless remote-control LED dimming light source

Info

Publication number: CN105636308A
Application number: CN201410719916.2A
Authority: CN
Inventors: 张丽玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-27
Filing date: 2014-11-27
Publication date: 2016-06-01

Abstract

The invention relates to the technical field of an LED power supply circuit, and particularly to a wireless remote-control LED dimming light source with a wireless remote control function. The wireless remote-control LED dimming light source comprises a wireless transmitting remote controller, an RF receiver, a second single chip microcomputer and an LED constant current source, wherein the wireless transmitting remote controller is used for transmitting a radio frequency remote-control dimming instruction; the RF receiver is used for receiving the instruction from the wireless transmitting remote controller; the second single chip microcomputer is used for receiving the instruction from the RF receiver and outputting PWM waves with different duty ratios to a PWM wave input end of the LED constant-current source; and the LED constant current source is used for driving an LED lamp and outputting different driving current to the LED lamp according to the PWM waves input by the second single chip microcomputer. The invention provides a wireless remote-control LED dimming circuit; and meanwhile, dimming is realized through the way of the PWM waves, so that stroboflash is prevented.

Description

A kind of wireless remote control LED dimming power source

Technical field

The present invention relates to LED power circuit engineering field, particularly relate to a kind of wireless remote control LED dimming power source of energy wireless remote control.

Background technology

LED illumination obtains people as lighting engineering of new generation with the advantage of its uniqueness and more and more favors, and LED can substitute electric filament lamp and fluorescent lamp, has environment friendly and pollution-free, safe and reliable, it is simple to the advantages such as maintenance. Again due to LED voltage current characteristics, the luminosity of LED and the size flowing through LED forward current are substantially proportional to example relation. Utilizing this feature, the brightness of LED can being changed by changing the electric current flowing through LED, thus realizing the purpose of light modulation.

But light-dimming method conventional at present is controllable silicon light modulation, controllable silicon regulator adopts phase control method to realize light modulation, namely controls controllable silicon regulator conducting at every sine wave half cycle, it is thus achieved that identical conduction phase angle. By regulating the chopped phase of controllable silicon regulator, thus it is possible to vary conduction phase angle size, it is achieved light modulation. But owing to the driving power supply of LED is capacitive load, mains input voltage waveform when adding controllable silicon regulator, can be made to produce distortion so that LED power can not steady operation normally, make LED light source that stroboscopic to occur.

Summary of the invention

In order to solve prior art Problems existing, the present invention provides a kind of wireless remote control LED light adjusting circuit, realizes light modulation by the mode of PWM ripple, does not have stroboscopic.

For solving above-mentioned technical problem, the technical scheme is that

A kind of wireless remote control LED dimming power source, including wireless transmit remote controller, RF receptor, second singlechip, LED constant current source; Wireless transmit remote controller, is used for launching RF remote-controlled dimming commands; RF receptor, for receiving the instruction that wireless transmit remote controller is launched; Second singlechip, for receiving the instruction of RF receptor and exporting the PWM ripple PWM ripple input to LED constant current source of different duty; LED constant current source, is used for driving LED, exports different driving electric currents to LED according to the PWM ripple of second singlechip input.

Concrete, described wireless transmit remote controller includes the key circuit, the first single-chip microcomputer and the RF emitter that are electrically connected to each other, key circuit is provided with key point, key, lightens key and dim key.

Preferably, described LED constant current source includes the reduction regulation chip that model is LM3404, the Transient Suppression Diode being sequentially connected in series, input filter capacitor and startup resistance, starts resistor coupled in parallel between the VIN port and RON port of reduction regulation chip; The DIM port of described reduction regulation chip is PWM ripple input; The SW port of described reduction regulation chip is in series with inductance; The negative electrode of the first diode, the plus earth of described first diode is connected between SW port and the inductance of described reduction regulation chip; It is parallel with the second diode and output filter capacitor between the described inductance other end and reduction regulation chip CS port; It is serially connected with sampling resistor between described reduction regulation chip CS port and ground.

Being preferably but not limited to, the first described single-chip microcomputer and second singlechip model are Atmega16.

Compared with prior art, it has the remarkable advantages that the present invention:

1, a kind of wireless remote control LED dimming power source provided by the invention, adopts PWM mode to regulate the output electric current of LED constant current source, regulates the brightness of LED, do not have the phenomenon of stroboscopic;

2, the present invention adopts RF emitter and RF receptor realize signal transmission, relative to adopting ultrared communication mode, can realize communicating through barriers such as walls, can as desired by the brightness of remote controller remote adjustment LED, more energy-conservation.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings. In these accompanying drawings, for the sake of clarity, it is possible to be exaggerated size and the relative size in structure and region.

Fig. 1 is the structural representation of a kind of wireless remote control LED dimming power source in the present invention;

Fig. 2 is the circuit theory diagrams of LED constant current source in the present invention.

Running through whole accompanying drawing, identical accompanying drawing reference number will be understood to refer to identical element, feature and structure.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme is clearly and completely described. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of the protection of the present invention.

Embodiment 1:

A kind of wireless remote control LED dimming power source, including wireless transmit remote controller, is used for launching RF remote-controlled dimming commands; Described wireless transmit remote controller includes key circuit the 101, first single-chip microcomputer 102 and the RF emitter 103 that are electrically connected to each other, key circuit 101 is provided with key point, key, lightens key and dim key. Also include RF receptor 201, second singlechip 202, LED constant current source 300; Wherein, RF receptor is for receiving the instruction that wireless transmit remote controller is launched; Second singlechip 202 is for receiving the instruction of RF receptor 201 and exporting the PWM ripple of different duty to LED constant current source 300; LED constant current source 300 is used for driving LED 204, exports different driving electric currents to LED 204 according to the PWM ripple of second singlechip 202 output; Also including system power supply 203, for providing DC source to second singlechip 202, the first single-chip microcomputer 102 can adopt battery to power.

Concrete, described LED constant current source 300 includes the reduction regulation chip that model is LM3404, the Transient Suppression Diode Z1, the input filter capacitor C1 that are sequentially connected in series and startup resistance R1 and R2, start resistance R1 and R2 and be connected in parallel between the VIN port of reduction regulation chip and RON port; The DIM port of described reduction regulation chip is PWM ripple input; The SW port of described reduction regulation chip is in series with inductance L1; The negative electrode of the first diode Z2, the plus earth of described first diode Z2 is connected between SW port and the inductance L1 of described reduction regulation chip; It is parallel with the second diode Z3 and output filter capacitor C2 between the described inductance L1 other end and reduction regulation chip CS port; It is serially connected with sampling resistor R3 between described reduction regulation chip CS port and ground.

Being preferably but not limited to, the first described single-chip microcomputer and second singlechip model are Atmega16; In the present invention, the working frequency range of RF emitter and RF receptor is preferably 433MHZ, and this is not construed as limiting by certain present invention.

The present invention in the specific implementation, adopts key circuit 101 to input brightness regulation instruction, key circuit 101 is provided with key point, key, lightens key and dim key; Key information is input to the first single-chip microcomputer 102, first single-chip microcomputer 101 can export different control instructions to RF emitter 103 according to different key informations, RF emitter 103 exports the signal of 433MHZ to RF receptor 201, control instruction is input to second singlechip 202 by RF receptor 201, second singlechip can export the PWM ripple PWM ripple input to LED constant current source of different duty according to control instruction, and then regulate the size of current being input to LED, realize light modulation.

DC input voitage inputs from the input IN of LED constant current source 300, through Transient Suppression Diode Z1 and input filter capacitor C1, wherein Transient Suppression Diode Z1 can prevent the voltage of input IN excessive and burn reduction regulation chip, voltage-drop loading through input filter capacitor C1 is starting on resistance R1 and R2, startup reduction regulation chip LM3404. Reduction regulation chip LM3404 is a voltage-dropping type actuator derived by controllable current source, this device is used for driving high-power, high-brightness LED string, it has been internally integrated a N channel metal-oxide-semiconductor, frequency is turned on and off by what input to DIM port that the PWM ripple of different duty regulates metal-oxide-semiconductor, the CS port of reduction regulation chip is voltage detecting feedback end, can be used for controlling to flow through the electric current of LED. By the Voltage Feedback at sampling resistor R3 two ends to CS port, compared with the 200mV reference voltage of chip internal, thus controlling turning on and off of power MOS pipe to regulate the size exporting electric current, play the effect of overcurrent protection.

Embodiments described above, is not intended that the restriction to this technical scheme protection domain. The amendment made within any spirit at above-mentioned embodiment and principle, equivalent replacement and improvement etc., should be included within the protection domain of this technical scheme.

Claims

1. a wireless remote control LED dimming power source, it is characterised in that: include wireless transmit remote controller, RF receptor, second singlechip, LED constant current source;

Wireless transmit remote controller, is used for launching RF remote-controlled dimming commands;

RF receptor, for receiving the instruction that wireless transmit remote controller is launched;

Second singlechip, for receiving the instruction of RF receptor and exporting the PWM ripple PWM ripple input to LED constant current source of different duty;

LED constant current source, is used for driving LED, exports different driving electric currents to LED according to the PWM ripple of second singlechip input.

2. a kind of wireless remote control LED dimming power source as claimed in claim 1, it is characterized in that: described wireless transmit remote controller includes the key circuit, the first single-chip microcomputer and the RF emitter that are electrically connected to each other, key circuit is provided with key point, key, lightens key and dim key.

3. a kind of wireless remote control LED dimming power source as claimed in claim 1, it is characterized in that: described LED constant current source includes the reduction regulation chip that model is LM3404, Transient Suppression Diode, input filter capacitor and the startup resistance being sequentially connected in series, starts resistor coupled in parallel between the VIN port and RON port of reduction regulation chip; The DIM port of described reduction regulation chip is PWM ripple input;

The SW port of described reduction regulation chip is in series with inductance; The negative electrode of the first diode, the plus earth of described first diode is connected between SW port and the inductance of described reduction regulation chip; It is parallel with the second diode and output filter capacitor between the described inductance other end and reduction regulation chip CS port; It is serially connected with sampling resistor between described reduction regulation chip CS port and ground.

4. a kind of wireless remote control LED dimming power source as claimed in claim 1, it is characterised in that: the first described single-chip microcomputer and second singlechip model are Atmega16.