CN104684192A - Driving circuit and lamp - Google Patents
Driving circuit and lamp Download PDFInfo
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- CN104684192A CN104684192A CN201310643203.8A CN201310643203A CN104684192A CN 104684192 A CN104684192 A CN 104684192A CN 201310643203 A CN201310643203 A CN 201310643203A CN 104684192 A CN104684192 A CN 104684192A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The embodiment of the invention discloses a driving circuit, which comprises a power supply module, a control module, a feedback module, a voltage division module and a load module, wherein the power supply module is connected with the control module, the control module is respectively connected with the feedback module and the voltage division module, the voltage division module is respectively connected with the load module and the feedback module, when the control module detects triggering signals sent by the feedback module, the ratio of the charging time to the discharging time of the voltage division module is regulated, and the voltage division proportion of the voltage division module and the load module is controlled for regulating the voltage value of the load module to be corresponding to the triggering signals. The circuit has the advantages that the voltage division proportion of the voltage module and the load module can be controlled according to the concrete load condition, so that the goal of regulating the voltage value at the two ends of the load module can be achieved.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of drive circuit and light fixture.
Background technology
In recent years along with the develop rapidly of electronic technology, people always wish to change according to concrete loading condition the magnitude of voltage being connected on load two ends, such as, when load is multiple illuminating lamp LED strip connection, the voltage being then supplied to load blocks changes along with the quantity of illuminating lamp LED, but the power supply carrying out powering is all 220V alternating current, so different voltage can not be provided according to concrete loading condition, when the illuminating lamp LED connected is more, dividing potential drop due to each illuminating lamp LED can not reach the driving voltage of illuminating lamp LED, so illuminating lamp LED can more secretly or at all not work, when the illuminating lamp LED connected is less, because the dividing potential drop of each illuminating lamp LED is excessive, exceed the limiting voltage of illuminating lamp LED and burn out illuminating lamp LED, a kind of supply voltage specification is merely able to the lighting voltage providing fixed qty illuminating lamp LED.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of drive circuit and light fixture, can simply, easily according to concrete loading condition, control the dividing ratios of division module and load blocks, to reach the magnitude of voltage at regulating load module two ends.
In order to solve the problems of the technologies described above, embodiments provide a kind of drive circuit, comprise power module, control module, feedback module, division module and load blocks; Described power module is connected with described control module, and described control module is connected with described feedback module and described division module respectively, and described division module is connected with described load blocks and described feedback module respectively; When described control module detects the triggering signal that described feedback module sends, adjust the ratio of described division module charging interval and discharge time, control the dividing ratios of described division module and described load blocks, to regulate the magnitude of voltage of described load blocks corresponding with described triggering signal.
Wherein, described circuit also comprises overvoltage protective module; One end of described overvoltage protective module is connected with described load blocks and described division module respectively, and the other end of described overvoltage protective module is connected with described control module; When described control module detects that the electric current of described overvoltage protective module is in preset range, cut off the connection of described control module and described power module.
Wherein, described power module comprises transformer and rectifier bridge; The input of described transformer is connected with supply voltage, and the output of described transformer is connected with the input of described rectifier bridge, and the output of described rectifier bridge is connected with described control module.
Wherein, described control module comprises main control chip and the first electric capacity; The input of described main control chip is connected with described power module, the output of described main control chip is connected with one end of described first electric capacity and described division module respectively, the other end of described first electric capacity is connected with the feeder ear of described main control chip, and the feedback end of described main control chip is connected with described feedback module.
Wherein, described feedback module comprises the first resistance and the second resistance; One end of described first resistance is connected with the feedback end of described main control chip and one end of described second resistance respectively, the other end of described first resistance is connected with the output of described main control chip and described division module respectively, and the other end of described second resistance is connected with described division module.
Wherein, described feedback module also comprises the first diode and the second electric capacity; The negative pole of described first diode is connected with described second resistance and described second electric capacity respectively, the positive pole of described first diode is connected with described division module, one end of described second electric capacity is connected with the negative pole of described second resistance and described first diode respectively, the other end of the second electric capacity be connected with described division module
Wherein, described division module comprises inductance, the second diode and the 3rd electric capacity; The positive pole of described second diode is connected with the cathode output end of described rectifier bridge, the negative pole of described second diode is connected with the output of described main control chip and one end of described inductance respectively with described respectively, the other end of described inductance is connected with the positive pole of described first diode and one end of described 3rd electric capacity respectively, and the other end of described 3rd electric capacity is connected with the positive pole of described second diode.
Wherein, described overvoltage protective module comprises voltage stabilizing didoe and the 3rd diode; The negative pole of described voltage stabilizing didoe is connected with described division module and described load blocks respectively, and the positive pole of described voltage stabilizing didoe is connected with the positive pole of described 3rd diode, and the negative pole of described 3rd diode is connected with the feedback end of described main control chip.
Wherein, described load blocks comprises illuminating lamp LED; The positive pole of described illuminating lamp LED is connected with described feedback module and described division module respectively, and the negative pole of described illuminating lamp LED is connected with the anode of described second diode.
Accordingly, the embodiment of the present invention additionally provides a kind of light fixture, comprises above-mentioned drive circuit.
Implement the embodiment of the present invention, there is following beneficial effect:
Driving circuit structure of the present invention is simple, can convenient, simply according to concrete loading condition, the charging interval of adjustment division module and discharge time, to adjust the dividing ratios of division module and load blocks, thus make the magnitude of voltage that the magnitude of voltage of load blocks reaches required, this driving method is easy to operate, and efficiency is high, can change the voltage of load blocks easily according to actual needs.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the block diagram of a kind of drive circuit that the embodiment of the present invention provides;
Fig. 2 is the circuit theory diagrams of a kind of drive circuit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in subsequent embodiment of the present invention, first electric capacity can adopt electric capacity C4 to represent, second electric capacity can adopt electric capacity C5 to represent, the 3rd electric capacity can adopt electric capacity C6 to represent, the first diode can adopt diode D2 to represent, second diode can adopt diode D1 to represent, 3rd diode can adopt diode D3 to represent, the first resistance can adopt resistance R1 to represent, the second resistance can adopt resistance R2 to represent.
Please refer to Fig. 1, is the block diagram of a kind of drive circuit that the embodiment of the present invention provides; It should be noted that, this drive circuit may be used for the situation of various needs according to actual loading situation regulating load module voltage, and load blocks is that illuminating lamp LED is only citing.
In embodiment, this drive circuit comprises power module, control module, feedback module, division module and load blocks; Power module is connected with control module, and control module is connected with feedback module and division module respectively, and division module is connected with load blocks and feedback module respectively; When control module detects the triggering signal that feedback module sends, the ratio of adjustment division module charging interval and discharge time, control the dividing ratios of division module and load blocks, corresponding with triggering signal with the magnitude of voltage of regulating load module, the magnitude of voltage of the corresponding load blocks of a kind of triggering signal.
Preferred further, on the basis of above-mentioned drive circuit, this drive circuit can also comprise overvoltage protective module, and one end of overvoltage protective module is connected with load blocks and division module respectively, and the other end of overvoltage protective module is connected with control module; When control module detects that the electric current of overvoltage protective module is in preset range, the connection of cutting-off controlling module and power module, overvoltage protective module mainly breaks down at circuit, when electric current is excessive, cuts off the connection of circuit, with protective circuit.
Driving circuit structure of the present invention is simple, can convenient, simply according to concrete loading condition, the charging interval of adjustment division module and discharge time, to adjust the dividing ratios of division module and load blocks, thus make the magnitude of voltage that the magnitude of voltage of load blocks reaches required, this driving method is easy to operate, and efficiency is high, can change the voltage of load blocks easily according to actual needs.
Please refer to Fig. 2, be the circuit theory diagrams of a kind of drive circuit that the embodiment of the present invention provides, in the present embodiment, power module comprises crystal oscillator, electric capacity C1, electric capacity C2, transformer, electric capacity C3 and rectifier bridge; Crystal oscillator is connected with 220V AC power, electric capacity C1 and electric capacity C2 connects, one end of electric capacity C1 is connected with the input of crystal oscillator and transformer respectively, the other end of electric capacity C1 is connected with electric capacity C2, one end of electric capacity C2 is connected with electric capacity C1, and the other end of electric capacity C2 is connected with the input of crystal oscillator and transformer respectively, and the output of transformer is in parallel with electric capacity C3, electric capacity C3 is connected with the input of rectifier bridge, and the output of rectifier bridge is connected with control module.The effect of power module mainly carries out rectification, filtering, over-voltage over-current protection etc. to the 220V alternating voltage of input, and voltage after treatment directly access control module can provide voltage to whole circuit.
In the present embodiment, control module comprises main control chip LNK30X and electric capacity C4; The input of main control chip LNK30X is connected with the cathode output end of rectifier bridge, and the feedback end of main control chip LNK30X is connected with feedback module, and the feeder ear of main control chip LNK30X is connected with electric capacity C4, and the LNK30X output of main control chip is connected with division module,
Alternating current after treatment inputs from the D pin of main control chip LNK30X, and export from S pin, FB pin is the input of feedback signal, and when the electric current flowing into this FB pin is greater than 49 μ A (now voltage 1.65V), the switch of integrated MOSFET pipe is terminated.BP pin provides 5.8V operating voltage to chip LNK30X, and when the shunt capacitance C4 being connected to BP pin is charged to 5.8V, MOSFET conducting, main control chip utilizes the energy be stored in shunt capacitance C4 to power.The power consumption that main control chip internal circuit is extremely low only relies on the electric current just energy continuous firing absorbed from drain lead.The shunt capacitance of a 0.1 μ F just enough realizes high frequency decoupling and stored energy.Due to the energization pins that BP pin is master control.It also has under-voltage protection function.The switch of power MOSFET is closed when pin voltage drops to below 4.85V.Once under bypass pin voltage drop to 4.85V, it must rise back 5.8V more just can the switch of enable (unlatching) power MOSFET again.
The operation principle of feed back input circuit is, when the electric current flowing into this FB pin is greater than 49 μ A (now voltage 1.65V), main control chip internal feedback circuitry can export a low logic level signal (inhibit signal).Power MOSFET can keep off state (forbidding).When the electric current flowing into this FB pin is less than 49 μ A.Main control chip internal feedback circuitry can export a high logic level signal (inhibit signal).Power MOSFET can keep opening state (enable).And this current source flowing into FB pin is in the triggering signal of feedback module, so when being gone out the triggering signal of feedback module by detection and Identification, then can be adjusted by the voltage of division module to load blocks.
In the present embodiment, feedback module comprises resistance R1, resistance R2, electric capacity C5 and diode D2, one end of resistance R1 is connected with the output of main control chip LNK30X and division module respectively, the other end of resistance R1 and the feedback end of main control chip LNK30X, one end of resistance R2 is connected with overvoltage protective module, the other end of resistance R2 is connected with one end of electric capacity C5 and the negative pole of diode D2 respectively, the other end of electric capacity C5 is connected with division module, the positive pole of diode D2 respectively with division module, feedback module, overvoltage protective module is connected with load blocks, in feedback module, output voltage Vo is carried on electric capacity C5 by diode D2, voltage on this electric capacity C5 can be followed the change of output voltage Vo and change.Then, the voltage on C5, by the dividing potential drop of resistance R2 and resistance R1, inputs FB pin.When the size of condition resistance R2 and resistance R1 can input different triggering signals, the size of resistance R1 and resistance R2 can be converted out according to the concrete size of Vo.
In the present embodiment, division module comprises diode D1, inductance, electric capacity C6 and resistance R3, the negative pole of diode D1 is connected with the output of main control chip LNK30X and feedback module respectively, the positive pole of diode D1 is connected with the cathode output end of rectifier bridge, one end of inductance is connected with the negative pole of diode D1 and the output of main control chip LNK30X respectively, the other end of inductance is connected with the positive pole of electric capacity C6 and diode D2 respectively, electric capacity C6 and resistance R3 is in parallel, one end of resistance R3 respectively with overvoltage protective module, feedback module is connected with electric capacity C6, the other end of resistance R3 is connected with the positive pole of diode D1, when in main control chip LNK30X during the conducting of MOSFET pipe, electric capacity C6 is charged, when MOSFET pipe in main control chip LNK30X is closed, electric capacity C6 discharges, by changing the ratio of the charging and discharging time of electric capacity C6, the dividing ratios of inductance and load can be changed, thus the magnitude of voltage at adjustment load blocks two ends, to make the magnitude of voltage of load blocks corresponding with triggering signal.
In the present embodiment, overvoltage protective module comprises voltage-stabiliser tube, diode D3 and resistance R4, the negative pole of voltage-stabiliser tube is connected with resistance R3 and load blocks respectively, the positive pole of voltage-stabiliser tube is connected with the positive pole of diode D3, the negative pole of diode D3 is connected with one end of resistance R4, the other end of resistance R4 is connected with the feedback end of master control core LNK30X and feedback module respectively, when the feedback circuit of this drive circuit breaks down, electric current raises rapidly, voltage-stabiliser tube is breakdown, if when the feedback end of main control chip LNK30X detects that this current range in the larger context, the then connection of cutting-off controlling module and power module, since comprise drive circuit.
In the present embodiment, load blocks comprises illuminating lamp LED1, illuminating lamp LED1 and illuminating lamp LED3, the positive pole of illuminating lamp LED1 is connected with the negative pole of voltage-stabiliser tube and resistance R3 respectively, the negative pole of illuminating lamp LED1 is connected with the positive pole of illuminating lamp LED2, the negative pole of illuminating lamp LED2 is connected with the positive pole of illuminating lamp LED3, and the negative pole of illuminating lamp LED3 is connected with resistance R3 and electric capacity C6 respectively.
The embodiment of the present invention as follows for the circuit working process driven:
When inputting 220V alternating current, the alternating voltage of electric power source pair of module input carries out rectification, filtering and over-voltage over-current protection, the input of the main control chip LNK30X in voltage input control module after treatment, to power to control module, the feedback end of main control chip LNK30X detects triggering signal, this triggering signal is according to actual loading situation, calculate the resistance value of divider resistance R1 and R2, when the feedback end of main control chip LNK30X detects triggering signal, the conducting of control MOSFET pipe and shut-in time ratio, when the conducting of MOSFET pipe, electric capacity C6 is charged, inductance storage power, when MOSFET pipe is closed, electric capacity C6 discharges, inductance releases energy, the conducting of adjustment MOSFET pipe and shut-in time ratio, also the storage power that just have adjusted electric capacity and inductance and the ratio released energy, the dividing ratios of division module and load blocks changes, thus the magnitude of voltage of load blocks is adjusted according to actual loading situation.
When this drive circuit breaks down; feedback circuit cannot work; load blocks both end voltage is excessive; voltage-stabiliser tube in overvoltage protective module reaches puncture voltage; there is electric current in overvoltage protective module and flow into main control chip LNK30X; when main control chip LNK30X detects that the electric current of overvoltage protective module is in preset range, control the connection of cutting-off controlling module and power module, thus protection drive circuit and load.
Driving circuit structure of the present invention is simple, can convenient, simply according to concrete loading condition, the charging interval of adjustment division module and discharge time, to adjust the dividing ratios of division module and load blocks, thus make the magnitude of voltage that the magnitude of voltage of load blocks reaches required, this driving method is easy to operate, and efficiency is high, can change the voltage of load blocks easily according to actual needs.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a drive circuit, is characterized in that, comprises power module, control module, feedback module, division module and load blocks;
Described power module is connected with described control module, and described control module is connected with described feedback module and described division module respectively, and described division module is connected with described load blocks and described feedback module respectively;
When described control module detects the triggering signal that described feedback module sends, adjust the ratio of described division module charging interval and discharge time, control the dividing ratios of described division module and described load blocks, to regulate the magnitude of voltage of described load blocks corresponding with described triggering signal.
2. drive circuit as claimed in claim 1, it is characterized in that, described circuit also comprises overvoltage protective module;
One end of described overvoltage protective module is connected with described load blocks and described division module respectively, and the other end of described overvoltage protective module is connected with described control module;
When described control module detects that the electric current of described overvoltage protective module is in preset range, cut off the connection of described control module and described power module.
3. drive circuit as claimed in claim 2, it is characterized in that, described power module comprises transformer and rectifier bridge;
The input of described transformer is connected with supply voltage, and the output of described transformer is connected with the input of described rectifier bridge, and the output of described rectifier bridge is connected with described control module.
4. drive circuit as claimed in claim 3, it is characterized in that, described control module comprises main control chip and the first electric capacity;
The input of described main control chip is connected with described power module, the output of described main control chip is connected with one end of described first electric capacity and described division module respectively, the other end of described first electric capacity is connected with the feeder ear of described main control chip, and the feedback end of described main control chip is connected with described feedback module.
5. drive circuit as claimed in claim 4, it is characterized in that, described feedback module comprises the first resistance and the second resistance;
One end of described first resistance is connected with the feedback end of described main control chip and one end of described second resistance respectively, the other end of described first resistance is connected with the output of described main control chip and described division module respectively, and the other end of described second resistance is connected with described division module.
6. drive circuit as claimed in claim 5, it is characterized in that, described feedback module also comprises the first diode and the second electric capacity;
The negative pole of described first diode is connected with described second resistance and described second electric capacity respectively, the positive pole of described first diode is connected with described division module, one end of described second electric capacity is connected with the negative pole of described second resistance and described first diode respectively, the other end of the second electric capacity be connected with described division module.
7. drive circuit as claimed in claim 6, it is characterized in that, described division module comprises inductance, the second diode and the 3rd electric capacity;
The positive pole of described second diode is connected with the cathode output end of described rectifier bridge, the negative pole of described second diode is connected with the output of described main control chip and one end of described inductance respectively with described respectively, the other end of described inductance is connected with the positive pole of described first diode and one end of described 3rd electric capacity respectively, and the other end of described 3rd electric capacity is connected with the positive pole of described second diode.
8. drive circuit as claimed in claim 7, it is characterized in that, described overvoltage protective module comprises voltage stabilizing didoe and the 3rd diode;
The negative pole of described voltage stabilizing didoe is connected with described division module and described load blocks respectively, and the positive pole of described voltage stabilizing didoe is connected with the positive pole of described 3rd diode, and the negative pole of described 3rd diode is connected with the feedback end of described main control chip.
9. drive circuit as claimed in claim 8, it is characterized in that, described load blocks comprises illuminating lamp LED;
The positive pole of described illuminating lamp LED is connected with described feedback module and described division module respectively, and the negative pole of described illuminating lamp LED is connected with the anode of described second diode.
10. a light fixture, is characterized in that, comprises the drive circuit described in 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310643203.8A CN104684192B (en) | 2013-12-03 | 2013-12-03 | A kind of driving circuit and lamps and lanterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310643203.8A CN104684192B (en) | 2013-12-03 | 2013-12-03 | A kind of driving circuit and lamps and lanterns |
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| CN104684192A true CN104684192A (en) | 2015-06-03 |
| CN104684192B CN104684192B (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310643203.8A Active CN104684192B (en) | 2013-12-03 | 2013-12-03 | A kind of driving circuit and lamps and lanterns |
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| CN105636271A (en) * | 2016-01-29 | 2016-06-01 | 深圳和而泰照明科技有限公司 | Protection circuit for LED light source and LED light source |
| CN106879126A (en) * | 2017-04-18 | 2017-06-20 | 东莞泛美光电有限公司 | LED linear dimming driving circuit |
| CN107370468A (en) * | 2017-07-23 | 2017-11-21 | 成都斯普奥汀科技有限公司 | A kind of power amplifier source for magnetic resonance coupling wireless power transmission |
| CN110944432A (en) * | 2019-12-16 | 2020-03-31 | 华帝股份有限公司 | LED lamp constant current output circuit with over-temperature detection function and over-temperature detection method |
| CN111065189A (en) * | 2019-12-16 | 2020-04-24 | 华帝股份有限公司 | LED linear constant current circuit with overvoltage detection function and overvoltage detection method |
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| CN111065189A (en) * | 2019-12-16 | 2020-04-24 | 华帝股份有限公司 | LED linear constant current circuit with overvoltage detection function and overvoltage detection method |
| CN111065189B (en) * | 2019-12-16 | 2022-04-26 | 华帝股份有限公司 | LED linear constant current circuit with overvoltage detection function and overvoltage detection method |
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| CN104684192B (en) | 2018-11-06 |
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