CN205305170U - LED drive circuit , LED lamps and lanterns and constant voltage drive circuit - Google Patents
LED drive circuit , LED lamps and lanterns and constant voltage drive circuit Download PDFInfo
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- CN205305170U CN205305170U CN201521129003.1U CN201521129003U CN205305170U CN 205305170 U CN205305170 U CN 205305170U CN 201521129003 U CN201521129003 U CN 201521129003U CN 205305170 U CN205305170 U CN 205305170U
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Abstract
The utility model relates to a LED drive circuit for the connection converts the operating voltage of LED light source into between power and LED light source, with mains voltage, LED drive circuit includes constant current driver module, power supply type detection module, energy storage module and steady voltage control module. Steady voltage control module controls the energy storage module stably according to first voltage, second voltage and the power supply type acquireed second voltage. The utility model discloses still relate to LED lamps and lanterns and constant voltage drive circuit who uses above -mentioned LED drive circuit. The stable work of the adaptable various types of powers of above -mentioned LED drive circuit, LED lamps and lanterns and constant voltage drive circuit.
Description
Technical field
The utility model relates to light fixture, particularly relates to a kind of LED drive circuit, LED lamp and constant voltage drive circuit.
Background technology
Traditional LED drive power plate can only receive city's electricity input of 50-60Hz, can only be used for city's electric line with the LED finished product lamp that the assembling of the type power panel is produced. If this LED finished product lamp is accessed electric ballast support by user accidentally, there will be do not work, the phenomenon such as glimmer or overvoltage damage.
For solving the problem, adopt compatible type LED drive power plate. Traditional compatible type LED drive power plate control principle, such as Fig. 1, the basis of its main change Shi city electricity power panel adds high frequency identify circuit. When adopting the LED finished product lamp access electric ballast of this compatible type power panel; compatible type LED drive power plate can detect power supply type by input detecting circuit; then (by constant current short circuit) is disconnected by the constant current circuit of switching circuit Jiang Yuan city electricity; by directly supplying LED load after electric ballast rectification; be incorporated to point current load barretter rated output exports for catering to simultaneously, in order to avoid electric ballast enters protection state.
There is two problems in above-mentioned compatible type LED drive power plate: one is that the power supply front end of LED load does not have constant current circuit, and LED lamp bead is the element of electric current sensitivity, the voltage phase difference that the electric ballast of different brands exports is very big, cause LED lamp bead or it is in overload work, light declines seriously, even directly punch through damage, or it is exactly underproof, do not reach the requirement of illumination luminosity; Two is that point current load strengthens a loss, and point current load only plays a part to strengthen load power in the circuit, it is intended that allow after rated output that electric ballast reaches enough just can normal operation, a point current load causes input efficiency to become low, runs counter to the feature that LED is energy-conservation.
Practical novel content
Based on this, it is necessary to provide a kind of novel circuit, various types of input power can be adapted to, and maintain the voltage in a stable range to provide the energy needed for successive load.
Further, it would be desirable to provide a kind of LED lamp and a kind of constant voltage drive circuit.
A kind of LED drive circuit, for being connected between power supply and LED/light source, voltage of supply is converted to the operating voltage of LED/light source, described LED drive circuit comprises constant-current driven module, it is characterised in that, described LED drive circuit also comprises:
Power supply type detection module, for connecting described power supply, detects and the power supply type of out-put supply;
Energy-storage module, is connected between the first voltage end and the 2nd voltage end; Wherein, described first voltage end is the coupling end that power supply exports the first voltage after rectification, and described 2nd voltage end is the coupling end inputting the 2nd voltage to constant-current driven module, and described 2nd voltage is converted to described operating voltage through constant-current driven module;
Voltage stabilizing control module, connects described first voltage end, the 2nd voltage end to obtain described first voltage and the 2nd voltage respectively; Described voltage stabilizing control module also connects the output terminal of described power supply type detection module to obtain the power supply type of power supply; The control end that described voltage stabilizing control module also connects described energy-storage module with according to the first voltage obtained, the 2nd voltage and power supply type, control energy-storage module or energy storage or energy supply or as load bridging to stablize described 2nd voltage.
Wherein in an embodiment, described voltage stabilizing control module comprises the first voltage detecting circuit, the 2nd voltage detecting circuit and master control unit;
The input terminus of described first voltage detecting circuit connects described first voltage end, and output terminal is connected with the first voltage input detecting end of described master control unit;
The input terminus of described 2nd voltage detecting circuit connects described 2nd voltage end, and output terminal is connected with the 2nd voltage input detecting end of described master control unit;
The output terminal of described power supply type detection module is connected with the voltage type detecting end of described master control unit;
The control end of described energy-storage module is connected with the voltage stabilizing control end of described master control unit.
Wherein in an embodiment, described first voltage detecting circuit and the 2nd voltage detecting circuit are resistor voltage divider circuit.
Wherein in an embodiment, described power supply type detection module comprises opto-coupler chip, and described opto-coupler chip connects power supply, and outputs voltage signal to the voltage type detecting end of described master control unit.
Wherein in an embodiment, described energy-storage module comprises the first diode, the 2nd diode, the 3rd diode, the first inductance, the first electric capacity and three port switch devices;
Described first diode is connected between the first voltage end and the 2nd voltage end, and anode is connected with the first voltage end;
Described first inductance, the 2nd diode and the first electric capacity are connected in turn between the first voltage end and ground;
Described 3rd diode, the first electric capacity are connected to the 2nd in turn between voltage end and ground; And the negative electrode of described 2nd diode is connected with the anode of the 3rd diode, the anode of described 2nd diode is connected with the first inductance, and the negative electrode of described 3rd diode is connected with the 2nd voltage end;
The switch ends of described three port switch devices connects anode and the ground of described 2nd diode respectively, and the control end of described three port switch devices connects described voltage stabilizing control module.
Wherein in an embodiment, also comprise the first rectification bridge and the 2nd rectification bridge, two input terminuss of described first rectification bridge and the 2nd rectification bridge respectively with the two ends of described power supply;
The cathode output end of described first rectification bridge and the 2nd rectification bridge is common as described first voltage end after connecting.
Wherein in an embodiment, described first rectification bridge and the 2nd rectification bridge are fast-recovery commutation circuit.
A kind of LED lamp, comprises LED lamp panel and drives power panel, it is characterised in that, described driving power panel is provided with above-mentioned LED drive circuit.
A kind of constant voltage drive circuit, for being connected between power supply and constant voltage load, voltage of supply be converted to the operating voltage of constant voltage load, it is characterised in that, described constant voltage drive circuit comprises:
Power supply type detection module, for connecting described power supply, detects and the power supply type of out-put supply;
Energy-storage module, is connected between the first voltage end and the 2nd voltage end; Wherein, described first voltage end is the coupling end that power supply exports the first voltage after rectification, and described 2nd voltage end is to the input terminus of constant voltage load supplying;
Voltage stabilizing control module, connects described first voltage end, the 2nd voltage end to obtain described first voltage and the 2nd voltage respectively; Described voltage stabilizing control module also connects the output terminal of described power supply type detection module to obtain the power supply type of power supply; The control end that described voltage stabilizing control module also connects described energy-storage module with according to the first voltage obtained, the 2nd voltage and power supply type, control energy-storage module or energy storage or energy supply or as load bridging to stablize described 2nd voltage.
Above-mentioned LED drive circuit, LED lamp and constant voltage drive circuit, its voltage stabilizing control module is according to control energy-storage module or the energy storage of the relation of dissimilar input power, the first voltage and the 2nd voltage or is late-class circuit energy supply or stablizes front stage circuits as load bridging, thus reaches the object stablizing the 2nd voltage. Thus various types of power supply steady operation can be adapted to.
Accompanying drawing explanation
Fig. 1 is traditional compatible type LED drive power plate control principle drawing;
Fig. 2 is the LED drive circuit module map of an embodiment;
Fig. 3 is the cut-away view of voltage stabilizing control module;
Fig. 4 is the schematic circuit diagram of energy-storage module;
Fig. 5 a is the schematic appearance of lamp tube type LED lamp;
The internal layout of Fig. 5 b lamp tube type LED lamp;
Fig. 5 c is the schematic circuit that lamp tube type LED lamp is connected with instant-start electronic ballast circuit;
Fig. 5 d is the schematic circuit that lamp tube type LED lamp is connected with rapidly pre-warming startup circuit of electronic ballast;
Fig. 6 is the LED drive circuit module map of another embodiment.
| LED drive circuit | 10 | Power supply | 20��20�� |
| LED/light source | 30 | First rectification bridge | 110 |
| 2nd rectification bridge | 120 | Power supply type detection module | 130��130�� |
| Energy-storage module | 140,140 ' | Voltage stabilizing control module | 150��150�� |
| Constant-current driven module | 160 | First voltage end | 102��102�� |
| 2nd voltage end | 104��104�� | First voltage detecting circuit | 152 |
| 2nd voltage detecting circuit | 154 | Master control unit | 156 |
| Constant voltage drive circuit | 10�� | Constant voltage load | 30�� |
Embodiment
It is further described below in conjunction with drawings and Examples.
Fig. 2 is the LED drive circuit module map of an embodiment. This LED drive circuit 10 for being connected between power supply 20 and LED/light source 30, voltage of supply is converted to the operating voltage of LED/light source. This LED drive circuit 10 is compatible type LED drive circuit, is possible not only to connect common city's electricity power supply, it is also possible to directly connect the lamp bracket with electric ballast, and the electric current providing stable exports.
In an embodiment, LED drive circuit 10 comprises the first rectification bridge 110, the 2nd rectification bridge 120, power supply type detection module 130, energy-storage module 140, voltage stabilizing control module 150 and constant-current driven module 160.
Two input terminuss of the first rectification bridge 110 and the 2nd rectification bridge 120 two ends with power supply 20 (being illustrated as alternating-current in figure, it is also possible to be direct current) connect respectively. The cathode output end of the first rectification bridge 110 and the 2nd rectification bridge 120 is common as the first voltage end 102 after connecting. First voltage end 102 is the coupling end that power supply 20 exports the first voltage VIN1 after rectification.
First rectification bridge 110 and the 2nd rectification bridge 120 all can adopt fast-recovery commutation circuit. Fast-recovery commutation circuit can adapt to the power supply wave shape of multiple different frequency.
Power supply type detection module 130 connects power supply 20, detects and the power supply type of out-put supply 20. Constant-current driven module 160 inputs the 2nd voltage VIN2 through the 2nd voltage end 104. Described 2nd voltage VIN2 is converted to described operating voltage through constant-current driven module 160.
Energy-storage module 140 is connected between the first voltage end 102 and the 2nd voltage end 104.
Voltage stabilizing control module 150 connects the first voltage end 102, the 2nd voltage end 104 to obtain described first voltage VIN1 and the 2nd voltage VIN2 respectively. Voltage stabilizing control module 150 connects the output terminal of power supply type detection module 130 to obtain the power supply type of power supply 20. Voltage stabilizing control module 150 also connects the control end of energy-storage module 140 so that according to the first voltage VIN1 obtained, the 2nd voltage VIN2 and power supply type, control energy-storage module 140 stablizes described 2nd voltage VIN2.
Voltage stabilizing control module 150 is according to control energy-storage module 140 or the energy storage of the relation of dissimilar input power, the first voltage and the 2nd voltage or is late-class circuit energy supply or stablizes front stage circuits as load bridging, thus reaches the object stablizing the 2nd voltage VIN2.
As shown in Figure 3, voltage stabilizing control module 150 comprises the first voltage detecting circuit 152, the 2nd voltage detecting circuit 154 and master control unit 156.
First voltage input detecting end of output terminal and master control unit 156 that the input terminus of the first voltage detecting circuit 152 connects described first voltage end 102, first voltage detecting circuit 152 is connected. 2nd voltage input detecting end of output terminal and master control unit 156 that the input terminus of the 2nd voltage detecting circuit 154 connects the 2nd voltage end the 104, two voltage detecting circuit 154 is connected.
Composition graphs 2, the output terminal of power supply type detection module 130 is connected with the voltage type detecting end of master control unit 156. Specifically, power supply type detection module 130 comprises opto-coupler chip, and described opto-coupler chip connects power supply 20, and outputs voltage signal to the voltage type detecting end of master control unit 156. Opto-coupler chip can be isolated the electrical connection between exchange and direct current and do not affected detection function.
The control end of energy-storage module 140 is connected with the voltage stabilizing control end of master control unit 156.
In the present embodiment, the first voltage detecting circuit 152 and the 2nd voltage detecting circuit 154 are resistor voltage divider circuit. Specifically, the first voltage detecting circuit 152 comprises the resistance R1, the resistance R2 that are connected between the first voltage end 102 and ground, and the public end of resistance R1 and resistance R2 is connected with the first voltage input detecting end of master control unit 156. 2nd voltage detecting circuit 154 comprises the resistance R3, the resistance R4 that are connected between the 2nd voltage end 104 and ground, and the public end of resistance R3 and resistance R4 is connected with the 2nd voltage input detecting end of master control unit 156. For filtering, also can at resistance R4 place shunt capacitance C2.
Master control unit 156 can adopt its concrete function of chip microcontroller. It is by receiving the output of the first voltage, the 2nd voltage and power supply type detection module 130, differentiate the input type of power supply, then according to relation control energy-storage module 140 or the energy storage of the first voltage and the 2nd voltage or be late-class circuit energy supply or stablize front stage circuits as load bridging.
As shown in Figure 4, energy-storage module 140 comprises the first diode D1, the 2nd diode D2, the 3rd diode D3, the first inductance L 1, first electric capacity C1 and three port switch device Q1.
First diode D1 is connected between the first voltage end 102 and the 2nd voltage end 104, and anode is connected with the first voltage end 102. First inductance L 1, the 2nd diode D2 and the first electric capacity C1 are connected in turn between the first voltage end 102 and ground. 3rd diode D3, the first electric capacity C1 are connected in turn between the 2nd voltage end 104 and ground. The negative electrode of the 2nd diode D2 is connected with the anode of the 3rd diode D3, and the anode of described 2nd diode D2 is connected with the first inductance L 1, and the negative electrode of described 3rd diode D3 is connected with the 2nd voltage end 104.
The switch ends of three port switch device Q1 connects anode and the ground of described 2nd diode D2 respectively, and the control end of described three port switch devices connects described voltage stabilizing control module 150. Three port switch device Q1 can adopt MOS to manage.
Energy-storage module 140 described in Fig. 4 can according to circumstances as BUCK circuit working or as BOOST circuit working, namely can energy storage, energy supply or as load bridging.
The principle of work of above-mentioned LED drive circuit is described below in conjunction with accompanying drawing 2��4.
The input voltage of power supply is sent to voltage stabilizing control module through power supply type detection module, when voltage stabilizing control module judges that input voltage amplitude does not change, can be judged as that direct current inputs. When input voltage amplitude changes, then it is judged as exchange input. Under exchange input state, voltage stabilizing control module calculates again the cycle of input voltage change, calculates the frequency of exchange input. When frequency is 50-60Hz, it is considered as city's electricity input; When frequency is 10-70KHz, it is considered as the input (such as electric ballast) of other types.
On the basis judging Power supply type, control as follows.
1. input voltage is direct current.
In actual applications, volts DS input is generally that low pressure is more, derives from store battery (such as automobile-used or field work) or provides the isolating transformer (such as machine tool lighting, market showcase etc.) of human safety voltage. When the first voltage VIN1 is greater than the 2nd voltage VIN2, showing that the direct current of outside offer can meet the normal operation voltage requirements of constant-current driven module 160, now tank circuit 140 can carry out energy storage work.
But the first voltage VIN1 that also likely the outside power supply provided obtains can lower than the normal operation voltage of constant-current driven module 160. When master control unit 156 detects the first voltage VIN1 lower than lower limit, start three port switch device Q1 to work, first voltage VIN1 is promoted to the normal operation voltage needed for constant-current driven module 160 by the boost circuit consisted of the first inductance L 1, the 2nd diode D2 and the first electric capacity C1, master control unit 156 detects the 2nd voltage VIN2 simultaneously, such as overtension, then close three port switch device Q1, by switch-mode regulation repeatedly, it is ensured that the 2nd voltage VIN2 is constant.
2. input voltage is city's electricity.
Illuminating product all can be subject to the constraint of some specifications, such as input voltage scope, power factor, efficiency, outward current precision etc. City's electricity input gives load through the first diode D1 for rear class constant-current driven module 160 after full-wave rectification, forms master loop. First electric capacity C1 is reverse series connection with the 3rd diode D3, and the first electric capacity C1 can not be charged by the city's electricity after rectification, therefore power factor is very high, can reach more than 0.9. Because of the existence of the first diode D1, first inductance L 1 power taking comes from the front end (i.e. the first voltage end 102) of the first diode D1, in the crest stage of the all-wave after rectification, master control unit 156 starts three port switch device Q1 and works, by energy storage at the first electric capacity C1; When trough arrives, the first electric capacity C1 externally discharges, thus the voltage ensureing the 2nd voltage end 104 is comparatively steady. Can conveniently realize the input of full voltage range. Because there being the existence of accumulator, when voltage is lower, the first electric capacity C1 is by supplementing energy, thus ensure that rear class is supplied to the electric current of load can be constant in the limit of error specified.
3. input voltage is that electric ballast provides.
When coming from the power supply sources such as electric ballast when input voltage, because this kind of power supply source also has the characteristic such as constant current or constant voltage. Therefore the characteristic that energy-storage module 140 can be utilized to shunt carrys out balanced loaded total power, to ensure that electric ballast etc. works in standard state, thus the energy required for obtaining this circuit. When input voltage is higher, master control unit 156 starts three port switch device Q1, and the electric current of input can through the first inductance L 1 to three port switch device Q1 to the shunting of this loop, ground, and such electric ballast will reduce by voltage because load increases the weight of. Because three port switch device Q1 are the switch states being operated in high frequency, the flyback pulse in three port switch device Q1 switch processes can be stored in the first electric capacity C1 through the 2nd diode D2 rectification, thus supplements to rear class when volts lost is got off again.
Thus above-mentioned LED drive circuit can not only adapt to the input of multiple power supply, and the 2nd voltage VIN2 inputing to rear class also can not produce very big fluctuation, it is possible to makes late-class circuit steady operation.
Above-mentioned LED drive circuit is highly suitable for the LED lamp that fluorescent tube form is made. As shown in Figure 5 a, it is the outward appearance figure of lamp tube type LED lamp. Lamp tube type LED lamp comprises fluorescent tube body 11 and is connected to drawing of fluorescent tube body 11 two ends and connects lid 12. Wherein two ends draw connect lid 12 on be respectively equipped with two inserting foots 13.
As shown in Figure 5 b, fluorescent tube body 11 inside comprises LED lamp panel 14 and drives power panel 15. Power panel 15 is driven to be encapsulated in fluorescent tube body 11 together with LED lamp panel 14. Such as drive power panel 15 can be arranged in the arch cavity at LED lamp panel 14 back side. The inserting foot 13 driving the circuit in power panel 15 to connect on lid 12 by drawing on the one hand is drawn and is connected with outside power supply, is electrically connected with the LED in LED lamp panel 14 on the other hand. Drive power panel 15 that outside power supply can be converted to the operating voltage of LED lamp panel 14. Above-mentioned LED drive circuit is just arranged in LED power panel 15, and A, C, B, the D in the two of two ends inserting foot 13 difference corresponding diagram 2. Comprise the LED lamp of above-mentioned LED drive circuit, it is possible to be connected directly between on original tube stand, and do not need to original for drive the tube stand of fluorescent tube bulb carry out transformation just can normal operation. When directly connecting, LED lamp can not cause infringement.
It is applied to 2 rectification bridges in the above-described embodiments, it is establish to adapt to the various electric ballast in market. In the application in the input sources such as city's electricity or direct current, if only having 2 input lines, just passable with a rectification bridge.
The common barretter in market has point instant-start electronic barretter and rapidly pre-warming to start electric ballast. Instant-start electronic barretter is the mode adopting 2 line inputs, and connection is that other end processes equally, as shown in Figure 5 c using two terminal short circuits of fluorescent tube one as an input line.
Rapidly pre-warming starts the mode that electric ballast adopts 4 line inputs, and every has 2 terminals, for preheating filament use of powering, such as Fig. 5 d, is the compatible various barretter of energy, therefore has used 2 rectification bridges.
Above-mentioned LED drive circuit possesses the feature of wide input, it is possible to the application being designed to constant current or constant voltage is to drive all constant voltages or constant current product, and is not limited to LED illumination series products. As shown in Figure 6, the constant voltage drive circuit 10 ' of another embodiment is connected between power supply 20 ' and constant voltage load 30 ', is the operating voltage of constant voltage load 30 ' by the voltage transitions of power supply 20 '.
Constant voltage drive circuit comprises power supply type detection module 130 ', energy-storage module 140 ' and voltage stabilizing control module 150 '.
Power supply type detection module 130 ', for connecting described power supply 20 ', detects and the power supply type of out-put supply.
Energy-storage module 140 ' is connected between the first voltage end 102 ' and the 2nd voltage end 104 '; Wherein, described first voltage end 102 ' is the coupling end that power supply 20 ' exports the first voltage after rectification, and described 2nd voltage end 104 ' is the input terminus powered to constant voltage load 30 '.
Voltage stabilizing control module 150 ' connects described first voltage end 102 ', the 2nd voltage end 104 ' to obtain described first voltage and the 2nd voltage respectively; Described voltage stabilizing control module 150 ' also connects the output terminal of described power supply type detection module 130 ' to obtain the power supply type of power supply. The control end that described voltage stabilizing control module 150 ' also connects described energy-storage module 140 ' with according to the first voltage obtained, the 2nd voltage and power supply type, control energy-storage module or energy storage or energy supply or as load bridging to stablize described 2nd voltage.
Each technology feature of the above embodiment can combine arbitrarily, for making description succinct, each all possible combination of technology feature in above-described embodiment is not all described, but, as long as the combination of these technology features does not exist contradiction, all it is considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed several enforcement mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope. , it is also possible to make some distortion and improvement, it should be appreciated that for the person of ordinary skill of the art, without departing from the concept of the premise utility these all belong to protection domain of the present utility model. Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (9)
1. a LED drive circuit, for being connected between power supply and LED/light source, voltage of supply is converted to the operating voltage of LED/light source, described LED drive circuit comprises constant-current driven module, it is characterised in that, described LED drive circuit also comprises:
Power supply type detection module, for connecting described power supply, detects and the power supply type of out-put supply;
Energy-storage module, is connected between the first voltage end and the 2nd voltage end; Wherein, described first voltage end is the coupling end that power supply exports the first voltage after rectification, and described 2nd voltage end is the coupling end inputting the 2nd voltage to described constant-current driven module, and described 2nd voltage is converted to described operating voltage through constant-current driven module;
Voltage stabilizing control module, connects described first voltage end, the 2nd voltage end to obtain described first voltage and the 2nd voltage respectively; Described voltage stabilizing control module also connects the output terminal of described power supply type detection module to obtain the power supply type of power supply; The control end that described voltage stabilizing control module also connects described energy-storage module with according to the first voltage obtained, the 2nd voltage and power supply type, control described energy-storage module or energy storage or energy supply or as load bridging to stablize described 2nd voltage.
2. LED drive circuit according to claim 1, it is characterised in that, described voltage stabilizing control module comprises the first voltage detecting circuit, the 2nd voltage detecting circuit and master control unit;
The input terminus of described first voltage detecting circuit connects described first voltage end, and output terminal is connected with the first voltage input detecting end of described master control unit;
The input terminus of described 2nd voltage detecting circuit connects described 2nd voltage end, and output terminal is connected with the 2nd voltage input detecting end of described master control unit;
The output terminal of described power supply type detection module is connected with the voltage type detecting end of described master control unit;
The control end of institute's energy-storage module is connected with the voltage stabilizing control end signal of described master control unit.
3. LED drive circuit according to claim 2, it is characterised in that, described first voltage detecting circuit and the 2nd voltage detecting circuit are resistor voltage divider circuit.
4. LED drive circuit according to claim 2, it is characterised in that, described power supply type detection module comprises opto-coupler chip, and described opto-coupler chip connects described power supply, and outputs voltage signal to the voltage type detecting end of described master control unit.
5. LED drive circuit according to claim 1, it is characterised in that, described energy-storage module comprises the first diode, the 2nd diode, the 3rd diode, the first inductance, the first electric capacity and three port switch devices;
Described first diode is connected between the first voltage end and the 2nd voltage end, and anode is connected with the first voltage end;
Described first inductance, the 2nd diode and the first electric capacity are connected in turn between the first voltage end and ground;
Described 3rd diode, the first electric capacity are connected to the 2nd in turn between voltage end and ground; And the negative electrode of described 2nd diode is connected with the anode of the 3rd diode, the anode of described 2nd diode is connected with the first inductance, and the negative electrode of described 3rd diode is connected with the 2nd voltage end;
The switch ends of described three port switch devices connects anode and the ground of described 2nd diode respectively, and the control end of described three port switch devices connects described voltage stabilizing control module.
6. LED drive circuit according to claim 1, it is characterised in that, also comprise the first rectification bridge and the 2nd rectification bridge, two input terminuss of described first rectification bridge and the 2nd rectification bridge two ends with described power supply are connected respectively;
The cathode output end of described first rectification bridge and the 2nd rectification bridge is common as described first voltage end after connecting.
7. LED drive circuit according to claim 6, it is characterised in that, described first rectification bridge and the 2nd rectification bridge are fast-recovery commutation circuit.
8. a LED lamp, comprises LED lamp panel and drives power panel, it is characterised in that, described driving power panel is provided with the LED drive circuit described in the arbitrary item of claim 1��7.
9. a constant voltage drive circuit, for being connected between power supply and constant voltage load, voltage of supply be converted to the operating voltage of constant voltage load, it is characterised in that, described constant voltage drive circuit comprises:
Power supply type detection module, for connecting described power supply, detects and the power supply type of out-put supply;
Energy-storage module, is connected between the first voltage end and the 2nd voltage end; Wherein, described first voltage end is the coupling end that power supply exports the first voltage after rectification, and described 2nd voltage end is to the input terminus of constant voltage load supplying;
Voltage stabilizing control module, connects described first voltage end, the 2nd voltage end to obtain described first voltage and the 2nd voltage respectively; Described voltage stabilizing control module also connects the output terminal of described power supply type detection module to obtain the power supply type of power supply; The control end that described voltage stabilizing control module also connects described energy-storage module with according to the first voltage obtained, the 2nd voltage and power supply type, control energy-storage module or energy storage or energy supply or as load bridging to stablize described 2nd voltage.
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| CN201521129003.1U CN205305170U (en) | 2015-12-29 | 2015-12-29 | LED drive circuit , LED lamps and lanterns and constant voltage drive circuit |
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| CN201521129003.1U CN205305170U (en) | 2015-12-29 | 2015-12-29 | LED drive circuit , LED lamps and lanterns and constant voltage drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032552A1 (en) * | 2016-08-19 | 2018-02-22 | 唐晓云 | Microcomputer-controlled led color lamp with intelligent light switching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032552A1 (en) * | 2016-08-19 | 2018-02-22 | 唐晓云 | Microcomputer-controlled led color lamp with intelligent light switching |
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