CN104684189A - LED (Light-emitting Diode) drive circuit and mine explosion-proof lamp - Google Patents
LED (Light-emitting Diode) drive circuit and mine explosion-proof lamp Download PDFInfo
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- CN104684189A CN104684189A CN201310642606.0A CN201310642606A CN104684189A CN 104684189 A CN104684189 A CN 104684189A CN 201310642606 A CN201310642606 A CN 201310642606A CN 104684189 A CN104684189 A CN 104684189A
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Abstract
The invention belongs to the technical field of illumination and particularly relates to an LED (Light-emitting Diode) drive circuit and a mine explosion-proof lamp. The LED drive circuit provided by the invention comprises a drive module, a mine battery protector, a storage battery and a current-limiting module. According to the LED drive circuit, electric energy stored in the storage battery is utilized for supplying power to the whole LED drive circuit, and the mine battery protector is adopted to protect the battery, so that the battery is prevented from the phenomena such as overvoltage, undervoltage, overcurent or short circuit; in addition, a plurality of diodes in the current-limiting module are utilized to limit currents output by the storage battery; furthermore, the drive module only outputs currents which are less than one third of the rated working current of an LED module; by virtue of the measures, the safety of the LED drive circuit is greatly enhanced, and the requirements of an intrinsically-safe circuit can be met. Since the whole LED drive circuit has high safety, the mine explosion-proof lamp adopts a light shell, so that the portability of the mine explosion-proof lamp is enhanced.
Description
Technical field
The invention belongs to lighting technical field, particularly a kind of LED drive circuit and flameproof luminaire.
Background technology
Currently used flameproof luminaire, the very thick metallic walls of general employing adds that the thick Transparent Parts reaching several centimetres makes lamp casing.Its reason with mine in there is many fuel gas, the drive circuit of ordinary lamp and lantern there will be fault unavoidably, causes on fire from explosion, thus lights the fuel gas outside light fixture.Therefore, in order to make up the deficiency of the fail safe of the drive circuit of light fixture, thick and heavy housing is adopted drive circuit and extraneous fuel gas to be isolated, even if make the electronic devices and components inside light fixture on fire from explosion, also can not light the fuel gas outside lamp housing, thus reach the effect of flame proof.Adopt such flame proof mode can play good explosion-proof effect, but thick and heavy housing several kilograms easily, cause light fixture very heavy, particularly for wear-type or portable mine lamp, use very inconvenient.
Therefore, there is the low problem of drive circuit fail safe in existing flameproof luminaire.
Summary of the invention
The object of the present invention is to provide a kind of LED drive circuit, be intended to solve existing mine anti-explosion flameproof luminaire and there is the low problem of drive circuit fail safe.
A kind of LED drive circuit, comprises for connecting LED module and driving the driver module of described LED module work;
Described LED drive circuit also comprises mining battery protector, storage battery and current limliting module;
The positive pole of described storage battery and the input of described mining battery protector connect the positive charging end forming described LED drive circuit altogether, and the negative pole of described storage battery and the earth terminal of described mining battery protector connect the negative charging end that forms described LED drive circuit altogether and be connected to ground;
The output of described mining battery protector connects the input of described current limliting module, the output of described current limliting module and the power end of described driver module connect the positive output end forming described LED drive circuit altogether, described driver module has drive end, and the drive end of described driver module is the negative output terminal of described LED drive circuit;
The electric current that described driver module exports is less than 1/3rd of the rated operational current of described LED module, and described current limliting module comprises the diode that multiple head and the tail are sequentially connected in series.
Another object of the present invention is also to provide a kind of flameproof luminaire, comprises LED module, also comprises above-mentioned LED drive circuit.
LED drive circuit provided by the present invention includes driver module, mining battery protector, storage battery and current limliting module.This LED drive circuit utilizes accumulators store electric energy powering for whole LED drive circuit, and adopts mining battery protector to protect storage battery, avoids storage battery to occur overvoltage, under-voltage, overcurrent or short circuit phenomenon; In addition, the multiple diode pair storage battery institutes output current current limliting in current limliting module is utilized; Meanwhile, driver module is made only to export the electric current of 1/3rd of rated operational current lower than LED module.Above measure all greatly strengthen the fail safe of LED drive circuit, meets the requirement of intrinsically safe circuit.Because whole LED drive circuit has very high fail safe, make flameproof luminaire can adopt light and handy housing, thus enhance the portability of flameproof luminaire.
Accompanying drawing explanation
Fig. 1 is the structure chart of the LED drive circuit that first embodiment of the invention 1 provides;
Fig. 2 is the exemplary circuit structure chart of the LED drive circuit that first embodiment of the invention provides;
Fig. 3 is the exemplary circuit structure chart of the LED drive circuit that second embodiment of the invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
LED drive circuit provided by the present invention includes driver module, mining battery protector, storage battery and current limliting module, solves existing mine anti-explosion flameproof luminaire and there is the low problem of drive circuit fail safe.
Embodiment 1
Fig. 1 shows the structure of the LED drive circuit that the present embodiment provides, and for convenience of explanation, illustrate only part related to the present embodiment, details are as follows:
The LED drive circuit that the present embodiment provides comprises and connects LED module and the driver module 10 of driving LED module work.
Further, LED drive circuit also comprises mining battery protector U1, storage battery BAT and current limliting module 20.
Concrete, the positive pole of storage battery BAT and the input of mining battery protector U1 connect the positive charging end forming LED drive circuit altogether, and the negative pole of storage battery BAT and the earth terminal of mining battery protector U1 are connected to ground altogether and form the negative charging end of LED drive circuit;
The output of mining battery protector U1 connects the input of current limliting module 20; the output of current limliting module 20 and the power end of driver module 10 connect the positive output end forming LED drive circuit altogether; driver module 10 has drive end, and the drive end of driver module 10 is the negative output terminal of LED drive circuit.
Concrete, the positive charging end of LED drive circuit and negative charging end are for accessing electric current to realize the charging to storage battery BAT, and the positive output end of LED drive circuit is with negative output terminal for being connected LED module, and output services electric current is to LED module.
Further, driver module 10 export electric current lower than LED module rated operational current 1/3rd, current limliting module 20 comprises multiple end to end diode.
In the present embodiment, mining battery protector can be model be BK2.5L(B) mining battery protector; Storage battery BAT can be ferric phosphate lithium cell.
In the present embodiment, as shown in Figure 2, current limliting module 20 can comprise:
First diode D1, the second diode D2 and the 3rd diode D3;
The negative electrode of the first diode D1 connects the anode of the second diode D2, the negative electrode of the second diode D2 connects the anode of the 3rd diode D3, the input of the first diode D1 is the input of current limliting module 20, and the anode of the 3rd diode D3 is the input of current limliting module 20.
In the present embodiment, except the ferric phosphate lithium cell adopting fail safe higher is as except storage battery, additionally use special mining battery protector U1, mainly to the overvoltage of battery, under-voltage, overcurrent, short circuit is protected.And on the output loop of storage battery, have employed multiple diode and carry out multiple protective.
Mining battery protector U1 in the present embodiment, multiple diode all designs to meet the essential safety world, is all belong to protective circuit.There is no these circuit, can work, but circuit is in unsafe condition yet, more can not be used in mine-use lamp.
In the present embodiment, as shown in Figure 2, driver module 10 can comprise:
Second resistance R2, K switch 1, electric capacity C1 and LED drive chip U2;
The power end VDD of LED drive chip U2 and drive end LED is power end and the drive end of driver module 10 respectively, the first end arranging end SET and the second resistance R2 of LED drive chip U2 is connected to the first end of K switch 1 altogether, second end of K switch 1 and the first end of electric capacity C1 are connected to the power end VDD of LED drive chip U2 altogether, the test lead TEST of LED drive chip U2 and earth terminal GND is connected to ground altogether, and second end of the second resistance R2 and second end of electric capacity C1 are connected to ground altogether.
In the present embodiment, the LED drive chip of LED drive chip U2 can be model be T6327A-2210BWG, T6327A-3210BWG, T6327A-2210ADG or T6327A-3210ADG.
In the present embodiment, LED drive chip U2 supports the operating voltage of 2.7V to 5V.Two joint 3.2V ferric phosphate lithium cells can be adopted to be connected in series power storage module into 6.4V; Because storage battery is before powering to main control chip, through mining battery protector and three diodes, its voltage will reduce 2.4V, like this, to the voltage of main control chip just between 2.7 to 5V.
There are switching circuit and current detection circuit in LED drive chip U2 inside, can obtain different electric currents export according to the model of selected chip.In addition, LED drive chip U2 is low voltage difference chip, and power consumption own is very low, effectively can extend the service time of battery, and possesses the static electricity on human body's protective capacities more than 5KV.
In the present embodiment, the switch of light fixture, light modulation and flashing operation are all realize according to the level signal arranging end SET of LED drive chip U2.Resistance R2 is in order to when circuit steady operation, provides a low level signal to the end SET that arranges of LED drive chip U2.The switch of light fixture, light modulation and flashing operation are all determined by the time span arranging the high level signal that end SET provides of K switch 1 to driving chip U2.Concrete, according to the model of adopted chip, secondary light modulation, three grades of light modulations can be realized, to glimmer and function that SOS signal glimmers combines.
Although mechanics of communication is very flourishing now, the emergency of SOS signal has seldom been used, under mine, as run into the situation that communication apparatus cannot use.Sending this original method of SOS distress signal with light is the most effective mode.
The LED drive circuit that the present embodiment provides utilizes storage battery BAT storage of electrical energy powering for whole LED drive circuit, and adopts mining battery protector U1 to protect storage battery BAT, avoids storage battery BAT to occur overvoltage, under-voltage, overcurrent or short circuit phenomenon; In addition, the multiple diode pair storage battery BAT institutes output current current limliting in current limliting module 20 is utilized; Meanwhile, make driver module 10 export lower than LED module rated operational current 1/3rd electric current.Above measure all greatly strengthen the fail safe of LED drive circuit, meets the requirement of intrinsically safe circuit.Because whole LED drive circuit has very high fail safe, make flameproof luminaire can adopt light and handy housing, thus enhance the portability of flameproof luminaire.
Embodiment 2
In the present embodiment, as shown in Figure 3, current limliting module 20 comprises:
4th diode D4, the 5th diode D5 and the first resistance R1;
The negative electrode of the 4th diode D4 connects the anode of the 5th diode D5, the negative electrode of the 5th diode D5 connects the first end of the first resistance R1, the input of the 4th diode D4 is the input of current limliting module 20, and second end of the first resistance R1 is the input of current limliting module 20.
In the present embodiment, because diode does not belong to infallible component, and resistance belongs to infallible component and adopts a resistance to replace one of them diode in a upper embodiment, makes there is infallible component current limliting in circuit.When unreliable component failure, also have infallible component in protection, thus avoid causing coal-mine fire or blast.
Concrete, the first resistance R1 can adopt metalfilmresistor or Wound-rotor type resistance.
Embodiment 3
The enforcement of the present embodiment is based upon on the basis of the various embodiments described above.
In the present embodiment, LED drive circuit also comprises the 6th diode;
The negative electrode of the 6th diode connects the positive pole of storage battery, and the anode of the 6th diode is the second positive charging end of LED drive circuit.
In the present embodiment, the 6th diode of increase can make LED drive circuit safer in charging process, avoids charging current instability to cause damage to the electronic devices and components of LED drive circuit inside.
Embodiment 4
The enforcement of the present embodiment is based upon on the basis of the various embodiments described above.
The object of the present embodiment is to provide a kind of flameproof luminaire, comprises LED module, also comprises the LED drive circuit in above-mentioned any embodiment.
In the present embodiment, LED module can adopt the white light high power light source of the 1A of rated operational current, driver module 10 reality exports the current drives LED module of 210mA, remaining components and parts of LED drive circuit inside also all adopt lower than rated operational current 1/3rd operating current drive, to strengthen the fail safe of this flameproof luminaire further.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a LED drive circuit, comprises for connecting LED module and driving the driver module of described LED module work, it is characterized in that:
Described LED drive circuit also comprises mining battery protector, storage battery and current limliting module;
The positive pole of described storage battery and the input of described mining battery protector connect the positive charging end forming described LED drive circuit altogether, and the negative pole of described storage battery and the earth terminal of described mining battery protector connect the negative charging end that forms described LED drive circuit altogether and be connected to ground;
The output of described mining battery protector connects the input of described current limliting module, the output of described current limliting module and the power end of described driver module connect the positive output end forming described LED drive circuit altogether, described driver module has drive end, and the drive end of described driver module is the negative output terminal of described LED drive circuit;
The electric current that described driver module exports is less than 1/3rd of the rated operational current of described LED module, and described current limliting module comprises the diode that multiple head and the tail are sequentially connected in series.
2. LED drive circuit as claimed in claim 1, it is characterized in that, described current limliting module comprises:
First diode, the second diode and the 3rd diode;
The negative electrode of described first diode connects the anode of described second diode, the negative electrode of described second diode connects the anode of described 3rd diode, the input of described first diode is the input of described current limliting module, and the anode of described 3rd diode is the input of described current limliting module.
3. LED drive circuit as claimed in claim 1, it is characterized in that, described current limliting module comprises:
4th diode, the 5th diode and the first resistance;
The negative electrode of described 4th diode connects the anode of described 5th diode, the negative electrode of described 5th diode connects the first end of described first resistance, the input of described 4th diode is the input of described current limliting module, and the second end of described first resistance is the input of described current limliting module.
4. LED drive circuit as claimed in claim 1, it is characterized in that, described driver module comprises:
Second resistance, switch, electric capacity and LED drive chip;
The power end of described LED drive chip and drive end are power end and the drive end of described driver module respectively, the first end arranging end and described second resistance of described LED drive chip is connected to the first end of switch altogether, second end of described switch and the first end of described electric capacity are connected to the power end of LED drive chip altogether, the test lead of described LED drive chip and earth terminal are connected to ground altogether, and the second end of described second resistance and the second end of described electric capacity are connected to ground altogether.
5. LED drive circuit as claimed in claim 1, it is characterized in that, described LED drive circuit also comprises the 6th diode;
The negative electrode of described 6th diode connects the positive pole of described storage battery, and the anode of described 6th diode is the second positive charging end of described LED drive circuit.
6. LED drive circuit as claimed in claim 1, is characterized in that, described mining battery protector be model be BK2.5L(B) mining battery protector.
7. LED drive circuit as claimed in claim 4, is characterized in that, the LED drive chip of described LED drive chip to be model be T6327A-2210BWG, T6327A-3210BWG, T6327A-2210ADG or T6327A-3210ADG.
8. LED drive circuit as claimed in claim 1, it is characterized in that, described storage battery is ferric phosphate lithium cell.
9. a flameproof luminaire, comprises LED module, it is characterized in that, described flameproof luminaire comprises the LED drive circuit described in any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310642606.0A CN104684189B (en) | 2013-12-03 | 2013-12-03 | A kind of LED drive circuit and flameproof luminaire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310642606.0A CN104684189B (en) | 2013-12-03 | 2013-12-03 | A kind of LED drive circuit and flameproof luminaire |
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| CN104684189A true CN104684189A (en) | 2015-06-03 |
| CN104684189B CN104684189B (en) | 2019-03-12 |
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| CN201310642606.0A Active CN104684189B (en) | 2013-12-03 | 2013-12-03 | A kind of LED drive circuit and flameproof luminaire |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645399Y (en) * | 2003-09-28 | 2004-09-29 | 陕西星源照明灯具有限公司 | Miner's lamp with secondary light source |
| CN102223748A (en) * | 2011-06-17 | 2011-10-19 | 苏州半导体总厂有限公司 | Drive method and drive power source of light-emitting diode (LED) lamp with alternating current power supply |
| CN103188842A (en) * | 2011-12-29 | 2013-07-03 | 海洋王照明科技股份有限公司 | Miner lamp |
-
2013
- 2013-12-03 CN CN201310642606.0A patent/CN104684189B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645399Y (en) * | 2003-09-28 | 2004-09-29 | 陕西星源照明灯具有限公司 | Miner's lamp with secondary light source |
| CN102223748A (en) * | 2011-06-17 | 2011-10-19 | 苏州半导体总厂有限公司 | Drive method and drive power source of light-emitting diode (LED) lamp with alternating current power supply |
| CN103188842A (en) * | 2011-12-29 | 2013-07-03 | 海洋王照明科技股份有限公司 | Miner lamp |
Non-Patent Citations (1)
| Title |
|---|
| TM TECHNOLOGY INC.: "《T6327A Low-Dropout, Constant-Current White LED with Dimming Control》", 31 March 2008 * |
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| CN104684189B (en) | 2019-03-12 |
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