CN101848580B - Led lamp control circuit and led lamp - Google Patents
Led lamp control circuit and led lamp Download PDFInfo
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- CN101848580B CN101848580B CN2010101743747A CN201010174374A CN101848580B CN 101848580 B CN101848580 B CN 101848580B CN 2010101743747 A CN2010101743747 A CN 2010101743747A CN 201010174374 A CN201010174374 A CN 201010174374A CN 101848580 B CN101848580 B CN 101848580B
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Abstract
The invention relates to an LED lamp control circuit and an LED lamp. The LED lamp control circuit comprises a power supply module, a switch control module, a constant current driving module, a voltage drop and stabilization module and a micro-control module, The power supply module comprises a direct current power supply, a control switch, a switch circuit and a signal detection circuit, wherein the control switch is used for controlling the direct current power supply to switch on or switch off, the switch circuit is switched on or switched off according to electrical signals on the control switch, and the signal detection circuit generates a detection signal according to the electrical signals on the control switch. The micro-control module controls the switch module to generate a first output voltage or the second output voltage according to the detection signals. The constant current driving module generates a first constant current or a second constant current according to the first output voltage or the second output voltage so that an LED light source works in a high light mode or a low light mode. In the invention, when the LED light source is extinguished, the direct current power supply does not need to supply power for the micro-control module, thereby the electric quantity is saved, and the LED light source can be switched between the high light mode and the low light weight.
Description
Technical field
The present invention relates to lighting technical field, more particularly, relate to a kind of LED lamp control circuit and LED light fixture.
Background technology
Therefore advantages such as in the prior art, that led light source has is energy-efficient, the life-span is long, low pressure is controlled are widely used in the various light fixtures.The mobile LED light fixture generally adopts powered battery, in existing LED lamp control circuit, control switch is arranged between single-chip microcomputer and the ground, single-chip microcomputer produces a square-wave signal by the operate condition that detects described control switch, described square-wave signal control constant-current drive circuit produces a constant current, is the led light source power supply.Single-chip microcomputer also can be controlled described led light source and be extinguished by detecting the operate condition of described control switch.When led light source is in when extinguishing state, described single-chip microcomputer also is in detected state always, and battery is always to the single-chip microcomputer power supply, so increased meaningless electric quantity consumption.
Summary of the invention
The technical problem to be solved in the present invention is, thereby is at led light source at above-mentioned in the prior art that single-chip microcomputer also needs powered battery to bring the defective of meaningless electric quantity consumption when extinguishing state, and a kind of LED lamp control circuit and LED light fixture of saving electric weight is provided.
One of the technical solution adopted for the present invention to solve the technical problems is: construct a kind of LED lamp control circuit, link to each other with led light source, it comprises supply module, switch control module, constant-current driven module, lowering and stabilizing blood pressure module and micro control module, described supply module, switch control module links to each other successively with constant-current driven module, thereby it is the micro control module power supply that the voltage that described lowering and stabilizing blood pressure module provides supply module carries out the lowering and stabilizing blood pressure processing, described micro control module is controlled the operating state of switch control module, described supply module comprises DC power supply, and described supply module also comprises control switch, switching circuit and signal deteching circuit;
Described control switch is used for the control DC power supply and opens or turn-off, comprise a moving contact, first fixed contact, second fixed contact and the 3rd fixed contact, described moving contact is connected to DC power supply, first fixed contact is unsettled, second fixed contact is connected to the input of described switching circuit, the 3rd fixed contact is connected to the output of described switching circuit, and second fixed contact is connected to described signal deteching circuit, described switching circuit is according to signal of telecommunication conducting or disconnection on second fixed contact, and the synchronous signal testing circuit produces a detection signal according to the signal of telecommunication on second fixed contact;
Described micro control module is controlled described switch control module according to described detection signal and is produced first output voltage or second output voltage, described constant-current driven module produces one according to described first output voltage and is used for described led light source with first constant current of high light pattern work, and perhaps described constant-current driven module is used for described led light source with second constant current of low light level pattern work according to described second output voltage generation one.
In the LED lamp control circuit of the present invention, described switching circuit comprises first switching tube and second switch pipe, when the signal of telecommunication on second fixed contact is high level, and the conducting of second switch pipe, thus control the first switching tube conducting so that described switching circuit conducting; When the signal of telecommunication on second fixed contact was low level, the second switch pipe ended, and first switching tube ends so that described switching circuit disconnects thereby control.
In the LED lamp control circuit of the present invention, described switching circuit also comprises the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, the 3rd fixed contact is connected to the drain electrode of first switching tube, the drain electrode of first switching tube is connected to the collector electrode of second switch pipe successively by the 3rd resistance and the 4th resistance, the grounded emitter of second switch pipe, the node of the 3rd resistance and the 4th resistance is connected to the grid of first switching tube, second fixed contact is connected to the source electrode of first switching tube, and the source electrode of first switching tube is connected to the base stage of second switch pipe successively by the 6th resistance, and the base stage of second switch pipe is by the 5th grounding through resistance.
In the LED lamp control circuit of the present invention, described switching circuit also comprises first diode, and first diode forward is connected between the base stage of the 6th resistance and second switch pipe.
In the LED lamp control circuit of the present invention, described signal deteching circuit comprises first resistance and second resistance, and by first resistance and second grounding through resistance, the node of first resistance and second resistance is exported described detection signal to second fixed contact successively.
In the LED lamp control circuit of the present invention, described LED lamp control circuit also comprises anti-reverse module, described anti-reverse module is arranged between the output and switch control module of described switching circuit, and the output of described anti-reverse module is connected to the input of described lowering and stabilizing blood pressure module, and described anti-reverse module connects in described DC power supply and disconnects inverse time.
In the LED lamp control circuit of the present invention, described LED lamp control circuit also comprises the short-circuit detecting module, described short-circuit detecting module is connected between the output and micro control module of constant-current driven module, described short-circuit detecting module detects the operating current of led light source, and the output short-circuit triggering signal is to described micro control module during greater than the current threshold that arranges in it at the operating current of led light source, and described micro control module is controlled described switch control module according to described short circuit triggering signal and disconnected so that described constant-current driven module quits work.
In the LED lamp control circuit of the present invention, described LED lamp control circuit also comprises the brightness regulation module, described brightness regulation module is connected between micro control module and the constant-current driven module, described micro control module is regulated first constant current of constant-current driven module output or the size of second constant current by the brightness regulation module, to regulate the luminosity of led light source.
In the LED lamp control circuit of the present invention, described first switching tube is mos field effect transistor.
Two of the technical solution adopted for the present invention to solve the technical problems is: construct a kind of LED light fixture, comprise led light source and coupled LED lamp control circuit, described LED lamp control circuit is the LED lamp control circuit described in one of technique scheme.
Implement LED lamp control circuit of the present invention and LED light fixture, have following beneficial effect:
When control switch disconnected, DC power supply was turn-offed, and led light source will be in and extinguish state, and at this moment, micro control module is not worked, and DC power supply does not need to have saved electric weight to the micro control module power supply; When the moving contact of control switch is connected to second fixed contact, the control switch conducting, the switching circuit conducting, signal deteching circuit produces second detection signal, micro control module produces second output voltage according to this second detection signal control switch control module, and it is luminous with low light level pattern that constant-current driven module produces second constant current control led light source according to described second output voltage; When the moving contact of control switch is connected to the 3rd fixed contact, the control switch conducting, switching circuit disconnects, signal deteching circuit produces first detection signal, micro control module produces first output voltage according to this first detection signal control switch control module, and it is luminous with the high light pattern that constant-current driven module produces first constant current control led light source according to described first output voltage.
Further, switching circuit comprises first switching tube and second switch pipe, when the signal of telecommunication on second fixed contact is high level, the conducting of second switch pipe, thereby control the first switching tube conducting so that the switching circuit conducting, so, when first switching tube is selected mos field effect transistor for use, conduction voltage drop is less, and the power of consumption is less.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the theory diagram of LED lamp control circuit first preferred implementation of the present invention;
Fig. 2 is the theory diagram of LED lamp control circuit second preferred implementation of the present invention;
Fig. 3 is the circuit diagram of an execution mode of supply module in the LED lamp control circuit of the present invention;
Fig. 4 is the circuit diagram of LED lamp control circuit shown in Figure 2.
Embodiment
As shown in Figure 1, be the theory diagram of LED lamp control circuit first preferred implementation of the present invention.LED lamp control circuit of the present invention links to each other with led light source, and it comprises supply module 1, switch control module 3, constant-current driven module 4, lowering and stabilizing blood pressure module 5 and micro control module 6.Wherein, supply module 1, switch control module 3 and constant-current driven module 4 link to each other successively, supply module 1 is constant-current driven module 4 power supplies by switch control module 3 backs, thereby the voltage that 5 pairs of supply modules 1 of lowering and stabilizing blood pressure module provide carries out the lowering and stabilizing blood pressure processing is micro control module 6 power supplies, and the operating state of 6 pairs of switch control modules 3 of micro control module is controlled.
As shown in Figure 2, be the theory diagram of LED lamp control circuit second preferred implementation of the present invention, be that with the difference of first preferred implementation shown in Figure 1 described LED lamp control circuit also comprises anti-reverse module 2, brightness regulation module 7 and short-circuit detecting module 8.Wherein, anti-reverse module 2 is arranged between the output and switch control module 3 of switching circuit 102, and the output of anti-reverse module 2 is connected to the input of lowering and stabilizing blood pressure module 5, brightness regulation module 7 is connected between micro control module 6 and the constant-current driven module 4, and short-circuit detecting module 8 is connected between the output and micro control module 6 of constant-current driven module 4.
The operating current of 8 pairs of led light sources of short-circuit detecting module detects, and the output short-circuit triggering signal is to micro control module 6 during greater than the current threshold that arranges in it at the operating current of led light source, and micro control module 6 is controlled described switch control module 3 according to described short circuit triggering signal and disconnected so that described constant-current driven module 4 quits work.
In addition, above-mentioned DC power supply 101 is battery, so supply module 1 also is included as the charging device that battery provides charging.
As shown in Figure 3, be the circuit diagram of an execution mode of supply module in the LED lamp control circuit of the present invention, this supply module 1 comprises DC power supply 101, control switch K, switching circuit 102 and signal deteching circuit 103.
Wherein, control switch K comprises a moving contact S0, the first fixed contact S1, the second fixed contact S2 and the 3rd fixed contact S3, moving contact S0 is connected to DC power supply 101, the first fixed contact S1 is unsettled, the second fixed contact S2 is connected to the input of switching circuit 102, the 3rd fixed contact S3 is connected to the output of switching circuit 102, and the second fixed contact S2 is connected to signal deteching circuit 103, signal of telecommunication conducting or disconnection on the switching circuit 102 foundations second fixed contact S2.Switching circuit 102 comprises the first switching tube Q1 and second switch pipe Q2 at least, and the course of work is as follows: when the signal of telecommunication on the second fixed contact S2 is high level, and second switch pipe Q2 conducting, thus control the first switching tube Q1 conducting so that switching circuit 102 conductings; When the signal of telecommunication on the second fixed contact S2 was low level, second switch pipe Q2 ended, and the first switching tube Q1 ends so that switching circuit 102 disconnects thereby control.Simultaneously, signal deteching circuit 103 produces detection signal TEST according to the signal of telecommunication on the second fixed contact S2.
In the present embodiment, switching circuit 102 also comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6, the 3rd fixed contact S3 is connected to the drain electrode of the first switching tube Q1, the drain electrode of the first switching tube Q1 is connected to the collector electrode of second switch pipe Q2 successively by the 3rd resistance R 3 and the 4th resistance R 4, the grounded emitter of second switch pipe Q2, the node of the 3rd resistance R 3 and the 4th resistance R 4 is connected to the grid of the first switching tube Q1, the second fixed contact S2 is connected to the source electrode of the first switching tube Q1, and the source electrode of the first switching tube Q1 is connected to the base stage of second switch pipe Q2 successively by the 6th resistance R 6, and the base stage of second switch pipe Q2 is by the 5th resistance R 5 ground connection.Signal deteching circuit 103 comprises first resistance R 1 and second resistance R, 2, the second fixed contact S2 successively by first resistance R 1 and second resistance R, 2 ground connection, the node output detection signal TEST of first resistance R 1 and second resistance R 2.
The concrete course of work of supply module 1 is as follows: when moving contact S0 is connected to the second fixed contact S2, the signal of telecommunication on the second fixed contact S2 is high level, the base stage of second switch pipe Q2 has electric current to flow through, second switch pipe Q2 conducting, at this moment, the level on the grid of the first switching tube Q1 is low level, the first switching tube Q1 conducting, so, switching circuit 102 conductings, the detection signal TEST of the node of first resistance R 1 and second resistance R 2 output at this moment is high level; When moving contact S0 is connected to the 3rd fixed contact S3, when the signal of telecommunication on the second fixed contact S2 is low level, the base stage of second switch pipe Q2 does not have electric current to flow through, second switch pipe Q2 by, at this moment, the level on the grid of the first switching tube Q1 is high level, the first switching tube Q1 by, so switching circuit 102 disconnects, the detection signal TEST of the node of first resistance R 1 and second resistance R 2 output at this moment is low level.
Further, switching circuit 102 also comprises the first diode D1, and the first diode D1 forward is connected between the base stage of the 6th resistance R 6 and second switch pipe Q2, plays the reverse-phase protection effect.
As shown in Figure 4, be the circuit diagram of LED lamp control circuit shown in Figure 2.
In the present embodiment; DC power supply 101 adopts battery; described battery inserts by Wiring port JP2; simultaneously; supply module 1 also is included as the charging device 104 that battery provides charging, and charging device 104 inserts by Wiring port JP1, in addition; the 6th diode D6 is connected between Wiring port JP1 and the Wiring port JP2, shields.
Wherein, anti-reverse module 2 comprises the 3rd switching tube Q3, the 7th resistance R 7 and the 8th resistance R 8.The drain electrode of the 3rd switching tube Q3 is connected to the 3rd fixed contact S3, and the source electrode of the 3rd switching tube Q3 is successively by the 8th resistance R 8 and the 7th resistance R 7 ground connection, and the grid of the 3rd switching tube Q3 is by the 7th resistance R 7 ground connection.
Wherein, lowering and stabilizing blood pressure module 5 comprises low-dropout regulator U4, the 11 resistance R 11, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4.The input of low-dropout regulator U4 is connected to the source electrode of the 3rd switching tube Q3 by the 11 resistance R 11, be connected between the source electrode and ground of the 3rd switching tube Q3 after first capacitor C 1 and 3 parallel connections of the 3rd capacitor C, be connected between the output and ground of low-dropout regulator U4 after second capacitor C 2 and 4 parallel connections of the 4th capacitor C, the output of low-dropout regulator U4 is connected to the feeder ear of micro control module 6.
Wherein, micro control module 6 comprises single-chip microcomputer U6, reset circuit, observation circuit, reference circuit and indicating circuit.Preferably, it is the single-chip microcomputer of PIC16F684 that single-chip microcomputer U6 selects model for use, and the feeder ear of single-chip microcomputer U6 is that pin 1 is the tenth capacitor C 10 ground connection by a filter capacitor, plays filtering.
Institute's reset circuit comprises the 26 resistance R 26, the 27 resistance R 27 and the 9th capacitor C 9.The feeder ear of single-chip microcomputer U6 is pin 1, and by the 26 resistance R 26 and the 9th capacitor C 9 ground connection, the node of the 26 resistance R 26 and the 9th capacitor C 9 is pin 4 by the reset terminal that the 27 resistance R 27 is connected to single-chip microcomputer U6 successively.
Described observation circuit comprises the first voltage-stabiliser tube D2, the 12 resistance R 12, the 13 resistance R 13 and the 14 resistance R 14.The node of first resistance R 1 and second resistance R 2 is successively by the 12 resistance R 12 and the 14 resistance R 14 ground connection, the node of the 12 resistance R 12 and the 14 resistance R 14 is pin 6 by the 3rd I/O end that the 13 resistance R 13 is connected to described single-chip microcomputer U6, the 3rd I/O end that the plus earth of the first voltage-stabiliser tube D2, the negative pole of the first voltage-stabiliser tube D2 are connected to described single-chip microcomputer U6 is pin 6.Single-chip microcomputer U6 produces a control signal according to the described detection signal of the node output of first resistance R 1 and second resistance R 2, described control signal is pin 10 outputs by the second I/O end of single-chip microcomputer U6, and described control signal will be controlled described switch control module 3 and produce first output voltage or second output voltage.
Described reference circuit comprises three ends adjustable shunting a reference source U5 and the 20 resistance R 20, the feeder ear of single-chip microcomputer U6 is pin 1 is connected to the adjustable shunting a reference source of three ends U5 by the 20 resistance R 20 negative electrode, the plus earth of three ends are adjustable shunting a reference source U5, the node of the 20 resistance R 20 and the adjustable shunting a reference source of three ends U5 is connected to the reference edge of the adjustable shunting a reference source of three ends U5, and the reference edge of three ends are adjustable shunting a reference source U5 is pin 12 by the reference voltage external connection end that the 25 resistance R 25 is connected to single-chip microcomputer U6 also.
Wherein, switch control module 3 comprises the 4th switching tube Q4, the 5th switching tube Q5, the 9th resistance R 9, the tenth resistance R 10, the 31 resistance R 31, the 32 resistance R 32, the 33 resistance R 33 and the 34 resistance R 34, the source electrode of the 4th switching tube Q4 is connected to the source electrode of the 3rd switching tube Q3, and the source electrode of the 4th switching tube Q4 also is connected to the collector electrode of the 5th switching tube Q5 successively by the 34 resistance R 34 and the 31 resistance R 31, the grounded emitter of the 5th switching tube Q5, the node of the 34 resistance R 34 and the 31 resistance R 31 is connected to the grid of the 4th switching tube Q4, the base stage of the 5th switching tube Q5 is pin 10 by the second I/O end that the 32 resistance R 32 is connected to single-chip microcomputer U6, and the base stage of the 5th switching tube Q5 is also by the 33 resistance R 33 ground connection, by the 9th resistance R 9 and the tenth resistance R 10 ground connection, the first I/O end that the node of the 9th resistance R 9 and the tenth resistance R 10 is connected to single-chip microcomputer is pin 11 successively in the drain electrode of the 4th switching tube Q4.Wherein, the 9th resistance R 9 and the tenth resistance R 10 constitute sample circuit; described sample circuit is sampled to the output voltage V CC of switch control module 3 and is obtained a sampled voltage; the first I/O end that the node of described sampled voltage by the 9th resistance R 9 and the tenth resistance R 10 exports single-chip microcomputer U6 to is pin 11; single-chip microcomputer U6 compares the reference voltage of the reference edge of described sampled voltage and the adjustable shunting a reference source of three ends U5; if described sampled voltage is less than described reference voltage; single-chip microcomputer U6 will control the 5th switching tube Q5 and end; thereby cut-off switch control module 3 plays a protective role to DC power supply 101.
Wherein, constant-current driven module 4 comprises first inductance L 1, one group or the many groups LED constant-current circuit that is in parallel, and every group of LED constant-current circuit includes constant-current driven chip and peripheral circuit thereof, and preferably, selecting model for use is the constant-current driven chip of MP2370.
In the present embodiment, comprise that with constant-current driven module 4 first inductance L 1 and three groups of LED constant-current circuits that are in parallel are that example is set forth, as follows:
First group of LED constant-current circuit comprises constant-current driven chip U1, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 3rd diode D3 and second inductance L 2, the input of described constant-current driven chip U1 is pin 5 is connected to described switch control module 2 by first inductance L 1 the i.e. drain electrode of the 4th switching tube Q4 of output, the input that the 16 resistance R 16 is connected to constant-current driven chip U1 is that pin 5 and Enable Pin are between the pin 4, the input that the 5th capacitor C 5 is connected to constant-current driven chip U1 is between pin 5 and the ground, the output of constant-current driven chip U1 is that pin 6 is connected to the anode that first led light source is LIGHT1 by second inductance L 2, the feedback end of constant-current driven chip U1 is that pin 3 is successively by the 15 resistance R 15 and the 17 resistance R 17 ground connection, the node of the 15 resistance R 15 and the 17 resistance R 17 is connected to the negative terminal that first led light source is LIGHT1, the output that the negative pole of the 3rd diode D3 is connected to constant-current driven chip U1 is pin 6, the plus earth of the 3rd diode D3, the output that the 6th capacitor C 6 is connected to constant-current driven chip U1 is that pin 6 and feed end are between the pin 1, and the 7th capacitor C 7 is connected between the anode and ground that first led light source is LIGHT1.
Second group of LED constant-current circuit comprises constant-current driven chip U2, the 15 resistance R 15 ', the 16 resistance R 16 ', the 17 resistance R 17 ', the 5th capacitor C 5 ', the 6th capacitor C 6 ', the 7th capacitor C 7 ', the 3rd diode D3 ' and second inductance L 2 ', the input of described constant-current driven chip U2 is that the input that pin 5 is connected to constant-current driven chip U1 is pin 5, the input that the 16 resistance R 16 ' is connected to constant-current driven chip U2 is that pin 5 and Enable Pin are between the pin 4, the input that the 5th capacitor C 5 ' is connected to constant-current driven chip U2 is between pin 5 and the ground, the output of constant-current driven chip U2 is that pin 6 is connected to the anode that second led light source is LIGHT2 by second inductance L 2 ', the feedback end of constant-current driven chip U2 is that pin 3 is successively by the 15 resistance R 15 ' and the 17 resistance R 17 ' ground connection, the node of the 15 resistance R 15 ' and the 17 resistance R 17 ' is connected to the negative terminal that second led light source is LIGHT2, the output that the negative pole of the 3rd diode D3 ' is connected to constant-current driven chip U2 is pin 6, the plus earth of the 3rd diode D3 ', the output that the 6th capacitor C 6 ' is connected to constant-current driven chip U2 is that pin 6 and feed end are between the pin 1, and the 7th capacitor C 7 ' is connected between the anode and ground that second led light source is LIGHT2.
The 3rd group of LED constant-current circuit comprises constant-current driven chip U3, the 15 resistance R 15 "; the 16 resistance R 16 ", the 17 resistance R 17 "; the 5th capacitor C 5 ", the 6th capacitor C 6 "; the 7th capacitor C 7 ", the 3rd diode D3 " and second inductance L 2 ", the input of described constant-current driven chip U3 is that the input that pin 5 is connected to constant-current driven chip U1 is pin 5, the 16 resistance R 16 " input that is connected to constant-current driven chip U3 is that pin 5 and Enable Pin are between the pin 4; the 5th capacitor C 5 " input that is connected to constant-current driven chip U3 is between pin 5 and the ground, the output of constant-current driven chip U3 is that pin 6 is by second inductance L 2 " be connected to the anode that the 3rd led light source is LIGHT3; the feedback end of constant-current driven chip U3 is that pin 3 is successively by the 15 resistance R 15 " and the 17 resistance R 17 " ground connection; the 15 resistance R 15 " and the 17 resistance R 17 " node be connected to the negative terminal that the 3rd led light source is LIGHT3; the 3rd diode D3 " the negative pole output that is connected to constant-current driven chip U3 be pin 6, the 3rd diode D3 " plus earth; the 6th capacitor C 6 " output that is connected to constant-current driven chip U3 is that pin 6 and feed end are between the pin 1, the 7th capacitor C 7 " be connected between the anode and ground that the 3rd led light source is LIGHT3.
Wherein, brightness regulation module 7 comprises the three group light regulating circuits corresponding with above-mentioned three groups of LED constant-current circuits that are in parallel.
First group of light regulating circuit includes the 18 resistance R 18, the 19 resistance R 19, the 5th diode D5 and the 8th capacitor C 8.The positive pole of the 5th diode D5 is pin 5 by the 5th I/O end that the 18 resistance R 18 and the 19 resistance R 19 are connected to single-chip microcomputer U6 successively, the node of the 18 resistance R 18 and the 19 resistance R 19 is by the 8th capacitor C 8 ground connection, and the feedback end that the negative pole of the 5th diode D5 is connected to the constant-current driven chip U1 of first group of LED constant-current circuit is pin 3.
Second group of light regulating circuit includes the 18 resistance R 18 ', the 19 resistance R 19 ', the 5th diode D5 ' and the 8th capacitor C 8 '.The positive pole of the 5th diode D5 ' is pin 5 by the 5th I/O end that the 18 resistance R 18 ' and the 19 resistance R 19 ' are connected to single-chip microcomputer U6 successively, the node of the 18 resistance R 18 ' and the 19 resistance R 19 ' is by the 8th capacitor C 8 ' ground connection, and the feedback end that the negative pole of the 5th diode D5 ' is connected to the constant-current driven chip U2 of first group of LED constant-current circuit is pin 3.
The 3rd group the light regulating circuit include the 18 resistance R 18 ", the 19 resistance R 19 ", the 5th diode D5 " and the 8th capacitor C 8 ".The 5th diode D5 " positive pole successively by the 18 resistance R 18 " and the 19 resistance R 19 " the 5th I/O end that is connected to single-chip microcomputer U6 is pin 5; the 18 resistance R 18 " and the 19 resistance R 19 " node by the 8th capacitor C 8 " ground connection, the 5th diode D5 " the negative pole feedback end that is connected to the constant-current driven chip U3 of first group of LED constant-current circuit be pin 3.
Wherein, short-circuit detecting module 8 comprises that with first led light source be that LIGHT1, second led light source are the 4th diode D4, the 4th diode D4 ', the 4th diode D4 that the positive pole of LIGHT2 and the 3rd led light source links to each other respectively ", the 21 resistance R 21, the 22 resistance R 22 and the 23 resistance R 23.The 4th diode D4, the 4th diode D4 ' and the 4th diode D4 " be in parallel; the feeder ear that the positive pole of the 4th diode D4 is connected to single-chip microcomputer U6 by the 23 resistance R 23 and the 22 resistance R 22 successively is that the node of pin 1, the 23 resistance R 23 and the 22 resistance R 22 is pin 3 by the 6th I/O end that the 21 resistance R 21 is connected to described single-chip microcomputer U6.
In addition, Wiring port JP6 is the Wiring port that presets of single-chip microcomputer U6, be used for connecting indicating circuit, the feeder ear that the terminal 1 of Wiring port JP6 is connected to single-chip microcomputer U6 is pin 1, terminal 2 is pin 7 by the 7th I/O end that the 28 resistance R 28 is connected to single-chip microcomputer U6, terminal 3 is pin 8 by the 8th I/O end that the 29 resistance R 29 is connected to single-chip microcomputer U6, terminal 4 is pin 9 by the 9th I/O end that the 30 resistance R 30 is connected to single-chip microcomputer U6, as the terminal 2 at Wiring port JP6, after inserting indicator light on terminal 3 and the terminal 4, can indicate the operating state of this LED control circuit.
In the present embodiment, the first switching tube Q1, the 3rd switching tube Q3, the 4th switching tube Q4 are the mos field effect transistor of STS5PF30L with model most preferably, and conduction voltage drop is less, thereby the power that consumes is less.
The course of work of this LED lamp control circuit is as follows:
First kind: led light source is in and extinguishes state.Specific as follows, the moving contact S0 of control switch K is connected to the first fixed contact S1, and control switch K disconnects, so DC power supply 101 is turn-offed, led light source is in and extinguishes state, and at this moment, micro control module 6 is not worked, and DC power supply 101 need not give micro control module 6 power supplies.
Second kind, led light source is luminous with low light level pattern.Specific as follows, the moving contact S0 of control switch K is connected to the second fixed contact S2, control switch K conducting, there is electric current to pass through on the base stage of second switch pipe Q2 at this moment, second switch pipe Q2 conducting, thereby make the first also conducting of switching tube Q1, the node of first resistance R 1 and second resistance R 2 is that the level on the TEST end is high level, this high level is second detection signal, micro control module 6 produces second output voltage according to the described second detection signal control switch control module 3, constant-current driven module 4 produces one according to described second output voltage and is used for led light source with second constant current of low light level pattern work, so led light source is LIGHT1, LIGHT2 and LIGHT3 are all luminous with low light level pattern.And during the first switching tube Q1 conducting, conduction voltage drop is less, thereby the power that consumes is less.
The third, led light source is luminous with the high light pattern.Specific as follows, the moving contact S0 of control switch K is connected to the 3rd fixed contact S3, control switch K conducting, there is not electric current to pass through on the base stage of second switch pipe Q2 at this moment, second switch pipe Q2 ends, so the first switching tube Q1 also ends, level on the node of first resistance R 1 and second resistance R 2 is low level, this low level is first detection signal, micro control module 6 produces first output voltage according to the described first detection signal control switch control module 3, constant-current driven module 4 produces one according to described first output voltage and is used for led light source with first constant current of low light level pattern work, so led light source is LIGHT1, LIGHT2 and LIGHT3 are all luminous with the high light pattern.
In above-mentioned second kind and the third course of work, short-circuit detecting module 8 detects the operating current of led light source always, when led light source is when any one operating current is greater than the current threshold that arranges in it among LIGHT1, LIGHT2 and the LIGHT3, with the output short-circuit triggering signal to micro control module 6, the 6th I/O end that is single-chip microcomputer U6 is that the level on the pin 3 becomes low level by high level, so, single-chip microcomputer U6 controls described switch control module 3 and disconnects so that constant-current driven module 4 quits work, in case circuit is caused damage.
Further, in above-mentioned second kind and the third course of work, the 5th I/O end of single-chip microcomputer U6 is that the luminosity that 5 pairs of led light sources of pin are LIGHT1, LIGHT2 and LIGHT3 is regulated simultaneously, namely, be the value of the voltage on the pin 3 by the feed end of regulating constant-current driven chip U1, constant-current driven chip U2 and constant-current driven chip U3 simultaneously, thereby the output that makes constant-current driven chip U1, constant-current driven chip U2 and constant-current driven chip U3 is the size of current of output on the pin 6 to change, thereby the luminosity of led light source is regulated.
Among the present invention, micro control module 6, lowering and stabilizing blood pressure module 5 and constant-current driven module 4 available chip models are not limited to above-mentioned mentioned arriving, and, can select to arrange according to the side circuit demand to the setting of current threshold and voltage threshold.
Compared with prior art, in the LED lamp control circuit of the present invention, when control switch K disconnects, DC power supply 101 is turn-offed, and led light source will be in and extinguish state, at this moment, micro control module 6 is not worked, and DC power supply 101 need not give micro control module 6 power supplies, has saved electric weight.When the moving contact S0 of control switch K is connected to the second fixed contact S2, control switch K conducting, there is electric current to pass through on the base stage of second switch pipe Q2 at this moment, second switch pipe Q2 conducting, thereby make the first also conducting of switching tube Q1, the node of first resistance R 1 and second resistance R 2 is that the level on the TEST end is high level, this high level is second detection signal, micro control module 6 produces second output voltage according to this second detection signal control switch control module 3, it is luminous with low light level pattern that constant-current driven module 4 produces second constant current control led light source according to described second output voltage, and during the first switching tube Q1 conducting, conduction voltage drop is less, and the power of consumption is less.When the moving contact S0 of control switch K is connected to the 3rd fixed contact S3, control switch K conducting, there is not electric current to pass through on the base stage of second switch pipe Q2 at this moment, second switch pipe Q2 ends, so the first switching tube Q1 also ends, the node of first resistance R 1 and second resistance R 2 is that the level on the TEST end is low level, this low level is first detection signal, micro control module 6 produces first output voltage according to this first detection signal control switch control module 3, and it is luminous with the high light pattern that constant-current driven module 4 produces first constant current control led light source according to described first output voltage.As seen, when LED control circuit of the present invention disconnects at control switch K, led light source will be in and extinguish state, and at this moment, micro control module 6 is not worked, DC power supply 101 need not give micro control module 6 power supplies, saved electric weight, in addition, the detection of the signal of telecommunication on the second fixed contact S2 by 103 couples of control switch K of signal deteching circuit, also realized the selection of the light-emitting mode of led light source, and the power that consumes during switching circuit 102 work is less.
In addition, the output short-circuit triggering signal is to micro control module 6 during greater than the current threshold that arranges in it at the operating current of led light source for short-circuit detecting module 8, and micro control module 6 quits work according to the described short circuit triggering signal control control module 3 of opening the light.Simultaneously, brightness regulation module 7 can be regulated the luminosity of led light source.Simultaneously, anti-reverse module 2 disconnects when DC power supply 101 reversal connections, and DC power supply 101 is shielded.
The invention still further relates to a kind of LED light fixture, it comprises LED control circuit and led light source, described LED control circuit is same as described above, and it comprises supply module 1, anti-reverse module 2, switch control module 3, constant-current driven module 4, lowering and stabilizing blood pressure module 5, micro control module 6, brightness regulation module 7 and short-circuit detecting module 8.Described supply module 1 comprises DC power supply 101, switching circuit 102 and signal deteching circuit 103, control switch K is used for control DC power supply 101 and opens or turn-off, control switch K comprises a moving contact S0, the first fixed contact S1, the second fixed contact S2 and the 3rd fixed contact S3, moving contact S0 is connected to DC power supply 101, the first fixed contact S1 is unsettled, the second fixed contact S2 is connected to the input of switching circuit 102, the 3rd fixed contact S3 is connected to the output of switching circuit 102, and the second fixed contact S2 is connected to signal deteching circuit 103, switching circuit 102 is according to signal of telecommunication conducting or disconnection on the second fixed contact S2, and synchronous signal testing circuit 103 produces a detection signal according to the signal of telecommunication on the second fixed contact S2.Micro control module 6 produces an output voltage according to this detection signal control switch control module 3, and constant-current driven module 4 produces a constant current for described led light source work according to described output voltage.
When control switch K disconnects, led light source will be in and extinguish state, and at this moment, micro control module 6 is not worked, and DC power supply 101 need not give micro control module 6 power supplies, has saved electric weight.When the moving contact S0 of control switch K is connected to the second fixed contact S2, control switch K conducting, switching circuit 102 conductings, signal deteching circuit 103 produces second detection signal, micro control module 6 produces second output voltage according to this second detection signal control switch control module 3, and it is luminous with low light level pattern that constant-current driven module 4 produces second constant current control led light source according to described second output voltage, and during the first switching tube Q1 conducting, conduction voltage drop is less, and the power of consumption is less.When the moving contact S0 of control switch K is connected to the 3rd fixed contact S3, control switch K conducting, switching circuit 102 disconnects, signal deteching circuit 103 produces first detection signal, micro control module 6 produces first output voltage according to this first detection signal control switch control module 3, and it is luminous with the high light pattern that constant-current driven module 4 produces first constant current control led light source according to described first output voltage.As seen, when LED control circuit of the present invention disconnects at control switch K, led light source will be in and extinguish state, micro control module 6 is not worked, and DC power supply 101 need not give micro control module 6 power supplies, has saved electric weight, in addition, detection by the signal of telecommunication on the second fixed contact S2 of 103 couples of control switch K of signal deteching circuit has also realized the selection of the light-emitting mode of led light source, and the power that consumes during switching circuit 102 work is less.
The embodiment of this LED control circuit will repeat no more herein.
The above only is embodiments of the invention, not in order to limiting the present invention, all any modifications of doing in the spirit and principles in the present invention, is equal to and replaces or improvement etc., all should be included in protection scope of the present invention.
Claims (9)
1. LED lamp control circuit, link to each other with led light source, it comprises supply module, switch control module, constant-current driven module, lowering and stabilizing blood pressure module and micro control module, described supply module, switch control module links to each other successively with constant-current driven module, thereby it is the micro control module power supply that the voltage that described lowering and stabilizing blood pressure module provides supply module carries out the lowering and stabilizing blood pressure processing, described micro control module is controlled the operating state of switch control module, described supply module comprises DC power supply, it is characterized in that
Described supply module also comprises control switch, switching circuit and signal deteching circuit;
Described control switch is used for the control DC power supply and opens or turn-off, comprise a moving contact, first fixed contact, second fixed contact and the 3rd fixed contact, described moving contact is connected to DC power supply, described first fixed contact is unsettled, described second fixed contact is connected to the input of described switching circuit, described the 3rd fixed contact is connected to the output of described switching circuit, and described second fixed contact is connected to described signal deteching circuit, described switching circuit comprises first switching tube and second switch pipe, when the signal of telecommunication on described second fixed contact is high level, the conducting of described second switch pipe, thereby control the described first switching tube conducting so that described switching circuit conducting, when the signal of telecommunication on described second fixed contact was low level, described second switch pipe ended, and described first switching tube ends so that described switching circuit disconnects thereby control; Simultaneously described signal deteching circuit produces a detection signal according to the signal of telecommunication on described second fixed contact;
Described micro control module is controlled described switch control module according to described detection signal and is produced first output voltage or second output voltage, described constant-current driven module produces one according to described first output voltage and is used for described led light source with first constant current of high light pattern work, and perhaps described constant-current driven module is used for described led light source with second constant current of low light level pattern work according to described second output voltage generation one.
2. LED lamp control circuit according to claim 1, it is characterized in that, described switching circuit also comprises the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, described the 3rd fixed contact is connected to the drain electrode of described first switching tube, the drain electrode of described first switching tube is connected to the collector electrode of described second switch pipe successively by described the 3rd resistance and described the 4th resistance, the grounded emitter of described second switch pipe, the node of described the 3rd resistance and described the 4th resistance is connected to the grid of described first switching tube, described second fixed contact is connected to the source electrode of described first switching tube, and the source electrode of described first switching tube is connected to the base stage of described second switch pipe successively by described the 6th resistance, and the base stage of described second switch pipe is by described the 5th grounding through resistance.
3. LED lamp control circuit according to claim 2 is characterized in that, described switching circuit also comprises first diode, and described first diode forward is connected between the base stage of described the 6th resistance and described second switch pipe.
4. according to the described LED lamp control circuit of one of claim 1 to 3, it is characterized in that, described signal deteching circuit comprises first resistance and second resistance, by described first resistance and described second grounding through resistance, the node of described first resistance and described second resistance is exported described detection signal to described second fixed contact successively.
5. LED lamp control circuit according to claim 1, it is characterized in that, described LED lamp control circuit also comprises anti-reverse module, described anti-reverse module is arranged between the output and described switch control module of described switching circuit, and the output of described anti-reverse module is connected to the input of described lowering and stabilizing blood pressure module, and described anti-reverse module connects in described DC power supply and disconnects inverse time.
6. LED lamp control circuit according to claim 1, it is characterized in that, described LED lamp control circuit also comprises the short-circuit detecting module, described short-circuit detecting module is connected between the output and described micro control module of described constant-current driven module, described short-circuit detecting module detects the operating current of described led light source, and the output short-circuit triggering signal is to described micro control module during greater than the current threshold that arranges in it at the operating current of described led light source, and described micro control module is controlled described switch control module according to described short circuit triggering signal and disconnected so that described constant-current driven module quits work.
7. LED lamp control circuit according to claim 1, it is characterized in that, described LED lamp control circuit also comprises the brightness regulation module, described brightness regulation module is connected between described micro control module and the described constant-current driven module, described micro control module is regulated first constant current of described constant-current driven module output or the size of second constant current by the brightness regulation module, to regulate the luminosity of described led light source.
8. LED lamp control circuit according to claim 1 is characterized in that, described first switching tube is mos field effect transistor.
9. a LED light fixture comprises led light source and coupled LED lamp control circuit, it is characterized in that, described LED lamp control circuit is any described LED lamp control circuit in the claim 1 to 8.
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| CN2010101743747A CN101848580B (en) | 2010-05-17 | 2010-05-17 | Led lamp control circuit and led lamp |
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| CN2010101743747A CN101848580B (en) | 2010-05-17 | 2010-05-17 | Led lamp control circuit and led lamp |
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| CN101848580B true CN101848580B (en) | 2013-07-17 |
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| CN102685969B (en) * | 2011-03-15 | 2015-03-11 | 登丰微电子股份有限公司 | LED drive circuit and short circuit protection circuit |
| CN102843809B (en) * | 2011-06-23 | 2015-07-22 | 比亚迪股份有限公司 | Human body movement induced dimming control device |
| CN103293473B (en) * | 2013-06-06 | 2015-10-14 | 深圳博用科技有限公司 | A kind of electronic switch testing circuit be applied in LED illumination lamp |
| CN103486475A (en) * | 2013-09-27 | 2014-01-01 | 无锡商业职业技术学院 | A LED lamp with adjustable brightness |
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| CN104883768A (en) * | 2014-02-28 | 2015-09-02 | 林万炯 | LED lamp power source management system and management method |
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| CN112628620B (en) * | 2016-01-22 | 2023-08-01 | 嘉兴山蒲照明电器有限公司 | An installation detection device and its applied power module device and LED lamp |
| CN108601136B (en) * | 2018-03-19 | 2024-06-14 | 厦门阳光恩耐照明有限公司 | Driving circuit for switching different states of toggle switch |
| CN111478554B (en) * | 2020-04-03 | 2025-02-11 | 深圳市长丰影像器材有限公司 | A power supply circuit based on touch switch |
| CN111629494B (en) * | 2020-04-29 | 2022-08-16 | 杭州涂鸦信息技术有限公司 | Intelligent switch and double-control switch |
| CN112312607B (en) * | 2020-09-15 | 2023-07-11 | 厦门阳光恩耐照明有限公司 | Constant current switching circuit of LED induction night lamp |
| CN114698191A (en) * | 2022-04-22 | 2022-07-01 | 欧普照明股份有限公司 | LED drive circuit and LED lighting device |
| CN115066057B (en) * | 2022-08-15 | 2022-11-01 | 深圳市博德致远生物技术有限公司 | Multichannel optical acquisition system circuit |
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