CN102395233A - Switching light modulation LED driving circuit and LED lamp set - Google Patents
Switching light modulation LED driving circuit and LED lamp set Download PDFInfo
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- CN102395233A CN102395233A CN2011103411878A CN201110341187A CN102395233A CN 102395233 A CN102395233 A CN 102395233A CN 2011103411878 A CN2011103411878 A CN 2011103411878A CN 201110341187 A CN201110341187 A CN 201110341187A CN 102395233 A CN102395233 A CN 102395233A
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Abstract
The invention provides a switching light modulation LED driving circuit and an LED lamp set. The switching light modulation LED driving circuit comprises a fuse, a rectification module, a filtering module, a first energy storage module, a starting module, a voltage stabilization filtering module, a circuit peak absorption module, a second energy storage module, a driving IC, a switch frequency setting module, an input power detection module, a driving module, an MOS tube, a transformer and an isolation rectification filtering module. The driving circuit in the invention has a high power factor, and in four-segment light modulation, there are high power factors which exceed 0.90, and high efficiency which exceeds 80%. Since a flow discharge resistor is not need to be used, work efficiency is raised, and usage is more convenient, environment-friendly and energy-efficient. No electrolytic capacitor in input, thus there is no need to worry about a life problem brought by an electrolytic capacitor. In addition, an optical coupler is not needed, constant current is output, a circuit is simple and clear, cost is low, and production is facilitated.
Description
Technical field
The present invention relates to the LED lighting field, refer in particular to a kind of switch light modulation led drive circuit and LED lamp group.
Background technology
Get into 21 century; Environmental issue has become a worldwide problem; Energy-efficient environment-friendly products are all being sought by each state, and the LED lamp has advantages such as conversion efficiency height, caloric value is low, use is durable, is described as the green illumination product of 21 century; Along with improving constantly and the decline of price of LED efficient, the application of LED is also more and more wider.Recent years, LED road lighting technology has obtained developing rapidly.Use also increasingly extensive.Yet the drive circuit of existing LED is directly to drive mostly, and the brightness regulation that is difficult to accomplish LED lamp group drives, and minority, for example tradition is shaken the prosecutor case or TRIAC dimmer scheme is installed has the inconvenience of existence.Wherein shake the controlled dimming scheme and must use the light modulation of modulator ability, have defective: 1, remote controller need be installed the battery use, and when battery electric quantity was low, the distance of shaking control was also along with becoming near.2, shake control certain directivity is arranged.3, when remote controller damage or loss, can not carry out light modulation.And the TRIAC dimmer is installed, and its essence is and adopt controllable silicon to carry out light modulation, be through the sinusoidal wave mode of cutting alternating current because of its light modulation principle again, destroy the waveform of AC sine wave, thereby reduced power factor, also strengthened harmonic constant.Produce the serious disturbance signal on the line.Controllable silicon light modulation is unstable when hanging down load, need add a bleeder resistor, has increased the power of complete machine.The LC filter of input can make controllable silicon produce vibration in addition, does not see for the incandescent lamp human eye, but will produce audio-frequency noise and flicker for LED.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, but provide a kind of safe ready to accomplish the led drive circuit and the LED lamp group of brightness regulation.
The objective of the invention is to realize like this: a kind of switch light modulation led drive circuit, it comprises that fuse, rectification module, filtration module, first energy-storage module, startup module, regulating filtering module, circuit spike absorption module, second energy-storage module, drive IC, switching frequency are provided with module, input power detection module, driver module, metal-oxide-semiconductor, transformer and isolation rectification filtration module;
Said civil power input fuse, fuse, rectification module, filtration module link to each other with first energy-storage module successively; Said first energy-storage module connects the startup module, the startup module connects regulating filtering module, regulating filtering module connection drive IC; Said drive IC inserts drive IC through road connection input power detection module, the input power detection module that PWM output connection driver module, driver module connect metal-oxide-semiconductor, metal-oxide-semiconductor; Metal-oxide-semiconductor the second tunnel connects second energy-storage module, second energy-storage module inserts drive IC, and the metal-oxide-semiconductor Third Road connects transformer; Said transformer one tunnel connects regulating filtering module, and another road connects the isolation rectification filtration module, and the output of isolation rectification filtration module connects the external LED lamp; Said switching frequency is provided with module and connects drive IC; Also be connected with the circuit spike between the said metal-oxide-semiconductor and first energy-storage module and absorb module;
Said fuse is used for fuse protection circuit when electric current is too high;
Said rectification module is used for converting alternating voltage into direct voltage;
Said filtration module is used for removing the pulsation alternating component of direct voltage, makes it to become level and smooth direct voltage;
Said first energy-storage module is used for when input voltage reduces, and discharges energy storage and makes that the voltage that exports load to is level and smooth;
Said startup module is used for when circuit is started working, providing starting resistor;
Said regulating filtering module is used to drive IC required stable direct-current working volts is provided;
Said circuit spike absorbs module, is used for absorbing peak voltage and the electric current that circuit produces;
Said second energy-storage module is used for when civil power breaks off, continuing to drive IC power supply, keeps its work with of short duration;
Said drive IC is used for according to switching frequency at interval and open and close the break-make number of times accordingly through the different driver modules that control signal to of PWM output;
Said switching frequency is provided with module, and what be used to be provided with external switch opens and close the interlude frequency;
Said input power detection module, the output voltage that is used to gather metal-oxide-semiconductor feeds back to drive IC;
Said driver module is used to accept drive IC control signal driven MOS plumber and does;
Said metal-oxide-semiconductor is used for driving the corresponding power output of adjusting of output according to driver module;
Said transformer is used for metal-oxide-semiconductor to the power transmission, voltage transformation and the insulation that drive between external LED and isolates;
Said isolation rectification filtration module is used for exporting the driven external LED through adjustment behind the rectifying and wave-filtering.
In the said structure, said isolation rectification filtration module comprises an electrochemical capacitor and is used for the 6th diode of isolation rectification;
In the said structure, said regulating filtering module comprises the 8th resistance, voltage stabilizing didoe, electric capacity of voltage regulation, pliotron and filter capacitor; Said the 8th resistance input connects the startup module, and the 8th resistance is exported one the road and is connected to the pliotron ground level, and another road links to each other with electric capacity of voltage regulation with the voltage stabilizing didoe of parallelly connected ground connection; Said pliotron emitter input connects drive IC, and collector electrode connects transformer; On the emitter of pliotron, collector electrode, be connected with filter capacitor respectively over the ground;
In the said structure, said circuit spike absorbs module and comprises second resistance, the 4th electric capacity and second diode, and an end is connected first energy-storage module after said second resistance and the 4th electric capacity parallel connection, and the other end connects second diode; Said second diode output connects transformer;
Said input power detection module comprises the tenth resistance, and said the tenth resistance is connected in the metal-oxide-semiconductor drain electrode, and the tenth resistance also is provided with lead and links to each other with drive IC.
The invention still further relates to a kind of LED lamp group, it comprises LED group and switch light modulation circuit; Said drive circuit comprises that fuse, rectification module, filtration module, first energy-storage module, startup module, regulating filtering module, circuit spike absorption module, second energy-storage module, drive IC, switching frequency are provided with module, input power detection module, driver module, metal-oxide-semiconductor, transformer and isolation rectification filtration module;
Said civil power input fuse, fuse, rectification module, filtration module link to each other with first energy-storage module successively; Said first energy-storage module connects the startup module, the startup module connects regulating filtering module, regulating filtering module connection drive IC; Said drive IC inserts drive IC through PWM output connection driver module, driver module connection metal-oxide-semiconductor, metal-oxide-semiconductor one tunnel connection power detection module, input power detection module; The second the tunnel connects second energy-storage module, second energy-storage module access drive IC, and Third Road connects transformer; Said transformer one tunnel connects regulating filtering module, and said transformer output connects the isolation rectification filtration module, and the output of isolation rectification filtration module connects the external LED lamp; Said switching frequency is provided with module and connects drive IC; Rate is provided with module and is connected drive IC between said metal-oxide-semiconductor and first energy-storage module;
Said fuse is used for fuse protection circuit when electric current is too high;
Said rectification module is used for converting alternating voltage into direct voltage;
Said filtration module is used for removing the pulsation alternating component of direct voltage, makes it to become level and smooth direct voltage;
Said first energy-storage module is used for when input voltage reduces, and discharges energy storage and makes that the voltage that exports load to is level and smooth;
Said startup module is used for when circuit is started working, providing starting resistor;
Said regulating filtering module is used to drive IC required stable direct-current working volts is provided;
Said circuit spike absorbs module, is used for absorbing peak voltage and the electric current that circuit produces;
Said second energy-storage module is used for when civil power breaks off, continuing to drive IC power supply, keeps its work with of short duration;
Said drive IC is used for according to switching frequency at interval and open and close the break-make number of times accordingly through the different driver modules that control signal to of PWM output;
Said switching frequency is provided with module, and what be used to be provided with external switch opens and close the interlude frequency;
Said input power detection module, the output voltage that is used to gather metal-oxide-semiconductor feeds back to drive IC;
Said driver module is used to accept drive IC control signal driven MOS plumber and does;
Said metal-oxide-semiconductor is used for driving the corresponding power output of adjusting of output according to driver module;
Said transformer is used for metal-oxide-semiconductor to the power transmission, voltage transformation and the insulation that drive between external LED and isolates;
Said isolation rectification filtration module is used for exporting the driven external LED through adjustment behind the rectifying and wave-filtering;
In the said structure, said isolation rectification filtration module comprises an electrochemical capacitor and is used for the 6th diode of isolation rectification;
In the said structure, said regulating filtering module comprises the 8th resistance, voltage stabilizing didoe, electric capacity of voltage regulation, pliotron and filter capacitor; Said the 8th resistance input connects the startup module, and the 8th resistance is exported one the road and is connected to the pliotron ground level, and another road links to each other with electric capacity of voltage regulation with the voltage stabilizing didoe of parallelly connected ground connection; Said pliotron emitter input connects drive IC, and collector electrode connects transformer; On the emitter of pliotron, collector electrode, be connected with filter capacitor respectively over the ground;
In the said structure, said circuit spike absorbs module and comprises second resistance, the 4th electric capacity and second diode, and an end is connected first energy-storage module after said second resistance and the 4th electric capacity parallel connection, and the other end connects second diode; Said second diode output connects transformer;
In the said structure, said input power detection module comprises the tenth resistance, and said the tenth resistance is connected in the metal-oxide-semiconductor drain electrode, and the tenth resistance also is provided with lead and links to each other with drive IC.
Than common controlled dimming and the controllable silicon light modulation of shaking; Beneficial effect of the present invention has been to save and has shaken the used remote controller of controlled dimming; This just makes it can be widely used in wanting to dim corridor, toilet, office hall, parking lot night, or downgrades public building during the late into the night, uses like the light in places such as hospital, school, train and bus stop; When adopting LED lamp group of the present invention or driving circuit drives LED; Only need switch on wall is switched once, then in switching frequency is provided with time of capacitance parameter decision of module, accomplish the action of quick on/off switch on wall, just can dim the light operating state of grade different brightness at the most.This drive circuit has higher power factor is arranged in addition, in four sections light modulations, all has to surpass 0.90 High Power Factor, surpasses 80% high efficiency.Owing to need not use bleeder resistor, promptly increase work efficiency, use more convenient environment friendly power saving.The input no electrolytic capacitor is not worried the life problems that electrochemical capacitor brings.Need not optocoupler, the output constant current.Circuit is simple and direct clear, with low cost, is convenient to produce.
Description of drawings
Below in conjunction with detailed description of the drawings concrete structure of the present invention:
Fig. 1 is a schematic block circuit diagram of the present invention;
Fig. 2 is a specific embodiment driving circuit section circuit diagram of the present invention;
Fig. 3 is specific embodiment LED group partial circuit figure of the present invention.
Embodiment
By specifying technology contents of the present invention, structural feature, realized purpose and effect, give explanation below in conjunction with execution mode and conjunction with figs. are detailed.
See also Fig. 1; The present invention relates to a kind of switch light modulation led drive circuit, it comprises that fuse, rectification module, filtration module, first energy-storage module, startup module, regulating filtering module, circuit spike absorption module, second energy-storage module, drive IC, switching frequency are provided with module, input power detection module, driver module, metal-oxide-semiconductor, transformer and isolation rectification filtration module.
Wherein, civil power input fuse, fuse, rectification module, filtration module link to each other with first energy-storage module successively; A road of said first energy-storage module connects the startup module, the startup module connects regulating filtering module, regulating filtering module connection drive IC, and another road connecting circuit spike of first energy-storage module absorbs module, circuit spike absorption module connects second energy-storage module, second energy-storage module connection drive IC; Said drive IC inserts drive IC through PWM output connection driver module, driver module connection metal-oxide-semiconductor, metal-oxide-semiconductor one tunnel connection power detection module, input power detection module, and another road connects transformer; Said transformer one tunnel connects regulating filtering module, and said transformer output connects the isolation rectification filtration module, and the output of isolation rectification filtration module connects the external LED lamp; Said switching frequency is provided with module and connects drive IC.
As an embodiment, isolation rectification filtration module of the present invention comprises that one is used for the 6th diode and the electrochemical capacitor of isolation rectification.
As another embodiment, regulating filtering module of the present invention comprises the 8th resistance, voltage stabilizing didoe, electric capacity of voltage regulation, pliotron and filter capacitor; Said the 8th resistance input connects the startup module, and the 8th resistance is exported one the road and is connected to the pliotron ground level, and another road links to each other with electric capacity of voltage regulation with the voltage stabilizing didoe of parallelly connected ground connection; Said pliotron emitter input connects drive IC, and collector electrode connects transformer; On the emitter of pliotron, collector electrode, be connected with filter capacitor respectively over the ground.
As another embodiment, said circuit spike of the present invention absorbs module and comprises second resistance, the 4th electric capacity and second diode, and an end is connected first energy-storage module after said second resistance and the 4th electric capacity parallel connection, and the other end connects second diode; Said second diode output connects transformer.
As an embodiment again, said input power detection module of the present invention comprises the tenth resistance, and said the tenth resistance is connected in the metal-oxide-semiconductor drain electrode, and the tenth resistance also is provided with lead and links to each other with drive IC.
The interaction relationship and the function of above-mentioned module are following:
Said fuse is used for fuse protection circuit when electric current is too high.When circuit breaks down or is unusual, be accompanied by electric current and constantly raise, the electric current of rising might damage some important devices in the circuit, also might burn circuit.If settled fuse in the circuit, so, fuse will be when current anomaly be elevated to certain altitude; Self fuse and cut off electric current; Thereby play the protective circuit purpose, this module is set makes when circuital current is elevated to certain altitude unusually, self fuse and cut off electric current; Thereby play the effect of protective circuit, entire circuit has a fail safe preferably.
Said rectification module is used for converting alternating voltage into direct voltage, can make in this machine incoming transport electrical network, through being operated in after the conversion under the required direct voltage but this module is set.
Said filtration module is used for removing the pulsation alternating component of direct voltage, and making it becomes level and smooth direct voltage, this module is set can makes that direct current is more level and smooth, and circuit working is stable.
Said first energy-storage module is used for when input voltage reduces, and discharges energy storage and makes that the voltage that exports load to is level and smooth, this module is set can makes circuit working stable, reduces output voltage fluctuation.
Said startup module is used for when circuit is started working, starting resistor being provided, and this module is set, and can to make that civil power rigidly connects fashionable, to drive IC a normal operating voltage is provided, and makes circuit working.
Said regulating filtering module is used to drive IC required stable direct-current working volts is provided, and this module is set can makes that direct voltage is more level and smooth, reduces the interference in the circuit, and circuit working is stable.
Said circuit spike absorbs module, is used for absorbing peak voltage and the electric current that circuit produces, and this module is set can makes the reliability of circuit working, and the protection power MOS pipe is not damaged by peak voltage.
Said second energy-storage module is used for when civil power breaks off, continuing to drive IC power supply, keeps its work with of short duration, this module is set can makes and when switch cuts off the power supply, can make drive IC internal counter register maintenance work.
Said drive IC; Be used at interval and open and close the break-make number of times accordingly through the different driver modules that control signal to of PWM output according to switching frequency; This module is set can makes and change the driving force of IC to power MOS pipe, thereby change operating power, output voltage changes thereupon.
Said switching frequency is provided with module, and what be used to be provided with external switch opens and close the interlude frequency, this module is set can makes operating frequency in the circuit along with change, trembles can reduce circuit frequently and disturb.
Said input power detection module, the output voltage that is used to gather metal-oxide-semiconductor feeds back to drive IC, this module is set can makes circuit that good constant current effect is arranged.
Said driver module is used to accept drive IC control signal driven MOS plumber and does, and this module is set can makes circuit export different pwm signals, realizes the purpose of output different capacity.
Said metal-oxide-semiconductor is used for driving the corresponding power output of adjusting of output according to driver module, this module is set can makes circuit adjust watt level.
Said transformer is used for metal-oxide-semiconductor and isolates to driving power transmission between external LED, voltage transformation and insulation, this module is set can makes the conversion of circuit, and high-low pressure is isolated.
Said isolation rectification filtration module is used for exporting the driven external LED through adjustment behind the rectifying and wave-filtering, this module is set can makes LED that normal operation dc voltage is arranged.
The invention still further relates to a kind of LED lamp group, it comprises LED group and switch light modulation circuit.
Drive circuit comprises that fuse, rectification module, filtration module, first energy-storage module, startup module, regulating filtering module, circuit spike absorption module, second energy-storage module, drive IC, switching frequency are provided with module, input power detection module, driver module, metal-oxide-semiconductor, transformer and isolation rectification filtration module;
Said civil power input fuse, fuse, rectification module, filtration module link to each other with first energy-storage module successively; Said first energy-storage module connects the startup module, the startup module connects regulating filtering module, regulating filtering module connection drive IC; Said drive IC inserts drive IC through PWM output connection driver module, driver module connection metal-oxide-semiconductor, metal-oxide-semiconductor one tunnel connection power detection module, input power detection module; The second the tunnel connects second energy-storage module, second energy-storage module access drive IC, and Third Road connects transformer; Said transformer one tunnel connects regulating filtering module, and said transformer output connects the isolation rectification filtration module, and the output of isolation rectification filtration module connects the external LED lamp; Said switching frequency is provided with module and connects drive IC; Rate is provided with module and is connected drive IC between said metal-oxide-semiconductor and first energy-storage module.
Said fuse is used for fuse protection circuit when electric current is too high;
Said rectification module is used for converting alternating voltage into direct voltage;
Said filtration module is used for removing the pulsation alternating component of direct voltage, makes it to become level and smooth direct voltage;
Said first energy-storage module is used for when input voltage reduces, and discharges energy storage and makes that the voltage that exports load to is level and smooth;
Said startup module is used for when circuit is started working, providing starting resistor;
Said regulating filtering module is used to drive IC required stable direct-current working volts is provided;
Said circuit spike absorbs module, is used for absorbing peak voltage and the electric current that circuit produces;
Said second energy-storage module is used for when civil power breaks off, continuing to drive IC power supply, keeps its work with of short duration;
Said drive IC is used for according to switching frequency at interval and open and close the break-make number of times accordingly through the different driver modules that control signal to of PWM output;
Said switching frequency is provided with module, and what be used to be provided with external switch opens and close the interlude frequency;
Said input power detection module, the output voltage that is used to gather metal-oxide-semiconductor feeds back to drive IC;
Said driver module is used to accept drive IC control signal driven MOS plumber and does;
Said metal-oxide-semiconductor is used for driving the corresponding power output of adjusting of output according to driver module;
Said transformer is used for metal-oxide-semiconductor to the power transmission, voltage transformation and the insulation that drive between external LED and isolates;
Said isolation rectification filtration module is used for exporting the driven external LED through adjustment behind the rectifying and wave-filtering.
As an embodiment, isolation rectification filtration module of the present invention comprises that one is used for the 6th diode and the electrochemical capacitor of isolation rectification.
As another embodiment, regulating filtering module of the present invention comprises the 8th resistance, voltage stabilizing didoe, electric capacity of voltage regulation, pliotron and filter capacitor; Said the 8th resistance input connects the startup module, and the 8th resistance is exported one the road and is connected to the pliotron ground level, and another road links to each other with electric capacity of voltage regulation with the voltage stabilizing didoe of parallelly connected ground connection; Said pliotron emitter input connects drive IC, and collector electrode connects transformer; On the emitter of pliotron, collector electrode, be connected with filter capacitor respectively over the ground.
As another embodiment, said circuit spike of the present invention absorbs module and comprises second resistance, the 4th electric capacity and second diode, and an end is connected first energy-storage module after said second resistance and the 4th electric capacity parallel connection, and the other end connects second diode; Said second diode output connects transformer.
As an embodiment again, said input power detection module of the present invention comprises the tenth resistance, and said the tenth resistance is connected in the metal-oxide-semiconductor drain electrode, and the tenth resistance also is provided with lead and links to each other with drive IC.
Like Fig. 2-3 is specific embodiment of the invention circuit diagram; Wherein switch control civil power inserts the bridge heap D1 rectification of rectification module behind fuse F1; Then after two capacitor C 2 of filtration module, C3 filtering, transfer high direct voltage to, through the energy storage inductor L1 of first energy-storage module.
The energy storage inductor L1 one tunnel of first energy-storage module connects the startup module that is composed in series by resistance R 6, R7, and a starting resistor is provided when being used for just starting shooting in system.Start module and connect regulating filtering module; For 10 pin of IC provide stable direct-current working volts; Said regulating filtering module is made up of the 8th resistance R 8, voltage stabilizing didoe D4, electric capacity of voltage regulation C5, pliotron Q5 and filter capacitor C31, C32; Wherein 8 inputs of the 8th resistance R connect the startup module, and 8 outputs one road of the 8th resistance R are connected to pliotron Q5 ground level, and another road links to each other with electric capacity of voltage regulation C5 with the voltage stabilizing didoe D4 of parallelly connected ground connection; And the input of the emitter of pliotron Q5 connects drive IC U1, and collector electrode connects transformer ER2510; On the emitter of pliotron Q5, collector electrode, be connected with filter capacitor C31, C32 respectively over the ground, thereby 10 pin that can be drive IC U1 provide stable direct-current working volts.
Said drive IC U1 drives through 9 pin output PWM; Through driver module parallel resistor R9, diode D3 driven MOS pipe Q4; Drive IC U1 transfers 9 pin through built-in dimming function and does corresponding driving output, thereby metal-oxide-semiconductor Q4 reaches the purpose of control power supply, adjustment power.In addition, 5 pin of drive IC U1 are the CAL calibration, and 3 pin FBK feed back input.2 pin are CT control, are connected with the capacitor C 36 that switching frequency is provided with module on it, are used to be provided with switching frequency.
And one tunnel connection power detection module of metal-oxide-semiconductor Q4 drain electrode; It comprises the tenth resistance R 10; Said the tenth resistance R 10 is connected in the drain electrode of metal-oxide-semiconductor Q4; The tenth resistance 10 also is provided with the power detection pin 8 of lead input drive IC U1, is used to let drive IC U1 can detect the voltage on the R10, and processing then performs an analysis in inside.
The second tunnel of metal-oxide-semiconductor Q4 drain electrode connects second energy-storage module, second energy-storage module comprises a storage capacitor C35; Storage capacitor C35 input is connected on its internal power source voltage output pin 1 pin of drive IC U1; Be used for when civil power moment disconnection; Go up the electric weight that stores by storage capacitor C35 and continue to the power supply of 6 pin, drive IC U1 internal counter register maintenance work, off switch need be in capacitor C 36 time corresponding (as common 1.5 seconds) of closing frequency setting module effectively.With the access drive IC, Third Road connects transformer;
The Third Road of metal-oxide-semiconductor Q4 source electrode connects transformer ER2510, through its isolate back coupling the other end the isolation rectification filtration module one be used for isolation rectification the 6th diode D6 and electrochemical capacitor C9, C15, and finally driving is connected the LED lamp group on the J1 that ushers.
Absorb module and also be connected with by the 4th capacitor C 4, second resistance R 2, the second diode D2 built-up circuit spike, be used to absorb peak voltage and electric current in 1 of the inductance L of the metal-oxide-semiconductor Q4 and first energy-storage module.Concrete, second resistance R 2 is connected energy storage inductor L1 with the 4 parallel connection back inputs of the 4th capacitor C, and output connects the second diode D2, and the output of the two or two utmost point D2 pipe connects the inductance L 1 and the transformer ER2510 of first energy-storage module.
Among the embodiment, said drive IC model is GM6182, and it is a kind of High Power Factor, the current off-line LED of constant lamp drive IC.It has a built-in simple and easy dimming function.The quantity that the counting switch on wall switches, and it is bright dark correspondingly to change light output, changes existing lighting and dimming function, to replace the inconvenience that a tradition is shaken the prosecutor case or TRIAC dimmer scheme is installed.GM6182 switches time of switch on wall should be less than accomplishing change action in 1.5 seconds.Most of according to observations people can do switch on wall about 0.2 to 0.8 second switches.Simple and easy light modulation provides: total power 60%, switching will turn back to total power once more.To directly extremely close fully, only need original switch on wall to the OFF position from any power level.Such as the LED bulb of a 8W, the corresponding power of light modulation is: 8W/5W/4W/2W.
In sum; Beneficial effect of the present invention has been to save and has shaken the used remote controller of controlled dimming; This just makes it can be widely used in wanting to dim corridor, toilet, office hall, parking lot night, or downgrades public building during the late into the night, uses like the light in places such as hospital, school, train and bus stop; When adopting LED lamp group of the present invention or driving circuit drives LED; Only need switch on wall is switched once, then in switching frequency is provided with time of capacitance parameter decision of module, accomplish the action of quick on/off switch on wall, just can dim light to 60% brightness.Switch for the second time and can for the third time then to 20% brightness, switch again and will get back to complete bright state to 40% brightness.Will be directly skip to brightly entirely from the accurate position of arbitrary light modulation, as long as you stop in the closed condition of switch on wall surpasses switching frequency and the time (as being generally 1.5 seconds) that module is provided with is set opens afterwards again, and lamp will be bright entirely.If will directly skip to entirely secretly, as long as switch on wall is switched to closed condition from the accurate position of arbitrary electric power.The drive IC that this circuit adopts has higher power factor is arranged, and in four sections light modulations, all has to surpass 0.90 High Power Factor, surpasses 80% high efficiency.In addition, do not use bleeder resistor, increase work efficiency, use just environmental protection power saving.The input no electrolytic capacitor is not worried the life problems that electrochemical capacitor brings.Need not optocoupler, the output constant current.Circuit is simple and direct clear, with low cost, is convenient to produce.
The above is merely embodiments of the invention in addition; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. switch light modulation led drive circuit is characterized in that: it comprises fuse, rectification module, filtration module, first energy-storage module, starts module, regulating filtering module, circuit spike absorb module, second energy-storage module, drive IC, switching frequency are provided with module, input power detection module, driver module, metal-oxide-semiconductor, transformer and isolation rectification filtration module;
Said civil power input fuse, fuse, rectification module, filtration module link to each other with first energy-storage module successively; Said first energy-storage module connects the startup module, the startup module connects regulating filtering module, regulating filtering module connection drive IC; Said drive IC inserts drive IC through road connection input power detection module, the input power detection module that PWM output connection driver module, driver module connect metal-oxide-semiconductor, metal-oxide-semiconductor; Metal-oxide-semiconductor the second tunnel connects second energy-storage module, second energy-storage module inserts drive IC, and the metal-oxide-semiconductor Third Road connects transformer; Said transformer one tunnel connects regulating filtering module, and another road connects the isolation rectification filtration module, and the output of isolation rectification filtration module connects the external LED lamp; Said switching frequency is provided with module and connects drive IC; Also be connected with the circuit spike between the said metal-oxide-semiconductor and first energy-storage module and absorb module;
Said fuse is used for fuse protection circuit when electric current is too high;
Said rectification module is used for converting alternating voltage into direct voltage;
Said filtration module is used for removing the pulsation alternating component of direct voltage, makes it to become level and smooth direct voltage;
Said first energy-storage module is used for when input voltage reduces, and discharges energy storage and makes that the voltage that exports load to is level and smooth;
Said startup module is used for when circuit is started working, providing starting resistor;
Said regulating filtering module is used to drive IC required stable direct-current working volts is provided;
Said circuit spike absorbs module, is used for absorbing peak voltage and the electric current that circuit produces;
Said second energy-storage module is used for when civil power breaks off, continuing to drive IC power supply, keeps its work with of short duration;
Said drive IC is used for according to switching frequency at interval and open and close the break-make number of times accordingly through the different driver modules that control signal to of PWM output;
Said switching frequency is provided with module, and what be used to be provided with external switch opens and close the interlude frequency;
Said input power detection module, the output voltage that is used to gather metal-oxide-semiconductor feeds back to drive IC;
Said driver module is used to accept drive IC control signal driven MOS plumber and does;
Said metal-oxide-semiconductor is used for driving the corresponding power output of adjusting of output according to driver module;
Said transformer is used for metal-oxide-semiconductor to the power transmission, voltage transformation and the insulation that drive between external LED and isolates;
Said isolation rectification filtration module is used for exporting the driven external LED through adjustment behind the rectifying and wave-filtering.
2. switch light modulation led drive circuit as claimed in claim 1 is characterized in that: said isolation rectification filtration module comprises an electrochemical capacitor and is used for the 6th diode of isolation rectification.
3. switch light modulation led drive circuit as claimed in claim 1 is characterized in that: said regulating filtering module comprises the 8th resistance, voltage stabilizing didoe, electric capacity of voltage regulation, pliotron and filter capacitor; Said the 8th resistance input connects the startup module, and the 8th resistance is exported one the road and is connected to the pliotron ground level, and another road links to each other with electric capacity of voltage regulation with the voltage stabilizing didoe of parallelly connected ground connection; Said pliotron emitter input connects drive IC, and collector electrode connects transformer; On the emitter of pliotron, collector electrode, be connected with filter capacitor respectively over the ground.
4. switch light modulation led drive circuit as claimed in claim 1; It is characterized in that: said circuit spike absorbs module and comprises second resistance, the 4th electric capacity and second diode; An end is connected first energy-storage module after said second resistance and the 4th electric capacity parallel connection, and the other end connects second diode; Said second diode output connects transformer.
5. switch light modulation led drive circuit as claimed in claim 1 is characterized in that: said input power detection module comprises the tenth resistance, and said the tenth resistance is connected in the metal-oxide-semiconductor drain electrode, and the tenth resistance also is provided with lead and links to each other with drive IC.
6. LED lamp group is characterized in that: it comprises LED group and switch light modulation circuit; Said drive circuit comprises that fuse, rectification module, filtration module, first energy-storage module, startup module, regulating filtering module, circuit spike absorption module, second energy-storage module, drive IC, switching frequency are provided with module, input power detection module, driver module, metal-oxide-semiconductor, transformer and isolation rectification filtration module;
Said civil power input fuse, fuse, rectification module, filtration module link to each other with first energy-storage module successively; Said first energy-storage module connects the startup module, the startup module connects regulating filtering module, regulating filtering module connection drive IC; Said drive IC inserts drive IC through PWM output connection driver module, driver module connection metal-oxide-semiconductor, metal-oxide-semiconductor one tunnel connection power detection module, input power detection module; The second the tunnel connects second energy-storage module, second energy-storage module access drive IC, and Third Road connects transformer; Said transformer one tunnel connects regulating filtering module, and said transformer output connects the isolation rectification filtration module, and the output of isolation rectification filtration module connects the external LED lamp; Said switching frequency is provided with module and connects drive IC; Rate is provided with module and is connected drive IC between said metal-oxide-semiconductor and first energy-storage module;
Said fuse is used for fuse protection circuit when electric current is too high;
Said rectification module is used for converting alternating voltage into direct voltage;
Said filtration module is used for removing the pulsation alternating component of direct voltage, makes it to become level and smooth direct voltage;
Said first energy-storage module is used for when input voltage reduces, and discharges energy storage and makes that the voltage that exports load to is level and smooth;
Said startup module is used for when circuit is started working, providing starting resistor;
Said regulating filtering module is used to drive IC required stable direct-current working volts is provided;
Said circuit spike absorbs module, is used for absorbing peak voltage and the electric current that circuit produces;
Said second energy-storage module is used for when civil power breaks off, continuing to drive IC power supply, keeps its work with of short duration;
Said drive IC is used for according to switching frequency at interval and open and close the break-make number of times accordingly through the different driver modules that control signal to of PWM output;
Said switching frequency is provided with module, and what be used to be provided with external switch opens and close the interlude frequency;
Said input power detection module, the output voltage that is used to gather metal-oxide-semiconductor feeds back to drive IC;
Said driver module is used to accept drive IC control signal driven MOS plumber and does;
Said metal-oxide-semiconductor is used for driving the corresponding power output of adjusting of output according to driver module;
Said transformer is used for metal-oxide-semiconductor to the power transmission, voltage transformation and the insulation that drive between external LED and isolates;
Said isolation rectification filtration module is used for exporting the driven external LED through adjustment behind the rectifying and wave-filtering.
7. LED lamp group as claimed in claim 6 is characterized in that: said isolation rectification filtration module comprises an electrochemical capacitor and is used for the 6th diode of isolation rectification.
8. LED lamp group as claimed in claim 6, it is characterized in that: said regulating filtering module comprises the 8th resistance, voltage stabilizing didoe, electric capacity of voltage regulation, pliotron and filter capacitor; Said the 8th resistance input connects the startup module, and the 8th resistance is exported one the road and is connected to the pliotron ground level, and another road links to each other with electric capacity of voltage regulation with the voltage stabilizing didoe of parallelly connected ground connection; Said pliotron emitter input connects drive IC, and collector electrode connects transformer; On the emitter of pliotron, collector electrode, be connected with filter capacitor respectively over the ground.
9. LED lamp group as claimed in claim 6; It is characterized in that: said circuit spike absorbs module and comprises second resistance, the 4th electric capacity and second diode; An end is connected first energy-storage module after said second resistance and the 4th electric capacity parallel connection, and the other end connects second diode; Said second diode output connects transformer.
10. LED lamp group as claimed in claim 6 is characterized in that: said input power detection module comprises the tenth resistance, and said the tenth resistance is connected in the metal-oxide-semiconductor drain electrode, and the tenth resistance also is provided with lead and links to each other with drive IC.
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| CN2011103411878A CN102395233A (en) | 2011-11-02 | 2011-11-02 | Switching light modulation LED driving circuit and LED lamp set |
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| CN2011103411878A CN102395233A (en) | 2011-11-02 | 2011-11-02 | Switching light modulation LED driving circuit and LED lamp set |
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Application publication date: 20120328 |