WO2014026461A1

WO2014026461A1 - Multi-output led drive system and semiconductor illumination device

Info

Publication number: WO2014026461A1
Application number: PCT/CN2013/000657
Authority: WO
Inventors: 王耀海
Original assignee: 欧普照明股份有限公司
Priority date: 2012-08-16
Filing date: 2013-06-04
Publication date: 2014-02-20
Also published as: CN102946665A

Abstract

A multi-output LED drive system and a semiconductor illumination device. The drive system comprises: a rectifying device (10), the rectifying device (10) being used for connecting to an external power source for rectification and power supply; and a power supply device (30) used together with the rectifying device (40) to supply power to a load when the drive system is connected to the load. Two output ends (31, 32) of the power supply device (30) and the output end (13) of the rectifying device are respectively connected to the load. The drive system comprises three output ends (12, 31, 32). A semiconductor light source drive system and a semiconductor illumination device having a simple structure and low costs are provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a driving system for a semiconductor light source, and more particularly to a multi-output LED driving system and a semiconductor lighting device.

technical background

The semiconductor light source (LED) is a light source and display device for the third generation of semiconductor materials. It has the characteristics of low power consumption, long life, no pollution, rich color, and strong controllability. It is a revolution in the lighting source and light industry. With the development of LEDs, more and more LED lighting products are entering the market. The electronic drive part of the LED is an integral part of LED lighting products.

At present, most LED drivers use a constant current output, which can have a limited load power. If a higher power load is required, the drive output current needs to be increased, so that the conversion efficiency of the driver is low, and the cost is high, which cannot effectively reflect the new generation of illumination LEDs. The energy saving advantage. In addition, there is currently a non-integrated LED driver that connects the LED light source under power-on conditions, which is prone to overshoot and LED failure.

Therefore, how to provide a semiconductor light source driving system with simple structure, low cost, and reduced efficiency loss has become a prominent problem in the development of the semiconductor field. In view of the problems existing in the prior art, the present invention proposes a multi-output LED driving system and a semiconductor lighting device which are one of the urgent problems to be solved in the technical field of the semiconductor light source driving system.

Summary of invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic drive circuit for LED lighting products that has a simple structure, a wide application range, and low cost. The invention realizes the electronic driving part of the LED by using fewer components, greatly reduces the number of components and the cost, and greatly reduces the proportion of the electronic driving part in the LED lighting system, and has the advantages of simple structure, low cost and reduced efficiency loss. Features.

Embodiments of the present invention provide a multi-output LED driving system, where the driving system includes: a rectifying device for connecting an external power source for rectification and power supply;

a power supply device, configured to supply power to the load when the drive system is connected to the load;

The two output ends of the power supply device and the output of the rectifier device are respectively connected to the load. According to an embodiment of the invention, the rectifier device is connected to an external power source and includes a fuse, and the external power When the source is AC power, the input voltage range is 120V/5 (T 60Hz ~ 240V/50" 60Hz, and the input voltage range is 12V ~ 400V when the external power supply is DC power.

According to an embodiment of the invention, the rectifying means comprises a bridge diode for rectification.

According to an embodiment of the invention, the power supply device comprises a single or a plurality of LED buck-boost drive line units.

In accordance with an embodiment of the invention, the single or plurality of LED buck-boost drive line units include, but are not limited to, Buck-Boost units and/or Tapped Buck units and/or Buck units.

According to an embodiment of the invention, the power supply device further includes a control unit and an energy storage and release unit, the control unit is connected to the energy storage and release unit, and is configured to control energy storage of the energy storage and release unit Release energy.

According to an embodiment of the invention, a filtering device is further included, and the filtering device is connected to the rectifying device for receiving and filtering a rectified voltage from the rectifying device, wherein the filtering device is an electromagnetic compatibility filtering circuit.

According to an embodiment of the invention, the power supply device supplies power to the load when the drive system is connected to the load, and the energy storage and release unit supplies power to the load under the control of the control unit.

According to an embodiment of the invention, further, the driving system comprises three outputs. A semiconductor lighting device comprising:

Semiconductor light source load;

a rectifying device for connecting an external power source for rectification and power supply; and a power supply device for supplying power to the load when the driving system is connected with a load;

The two output ends of the power supply device and the output of the rectifier device are respectively connected to the load. According to an embodiment of the invention, the power supply device further includes a control unit and an energy storage and release unit, the control unit is connected to the energy storage and release unit, and is configured to control energy storage of the energy storage and release unit Release energy.

According to an embodiment of the invention, the power supply device supplies power to the load in conjunction with the rectifying device, and the energy storage dissipating unit supplies power to the semiconductor light source load under the control of the control unit.

According to an embodiment of the invention, the load is a single or multiple LED groups.

According to an embodiment of the invention, the configuration of the single or multiple LED groups includes but is not limited to a string The hybrid connection structure of the connection or the parallel connection or the series-parallel connection is electrically connected.

According to an embodiment of the invention, the output end of the rectifying device and the first output end of the power supply device are respectively connected to the first end and the second end of the load, and the second output end of the power supply device is connected to the third end of the load.

Other objects and utilities of the present invention will become apparent from the following description of the invention.

DRAWINGS

Figure 1 is a schematic diagram of an LED drive system.

2 is a circuit diagram of an LED driving system in accordance with a first embodiment of the present invention.

3 is a schematic structural view of a power supply device of an LED driving system according to a first embodiment of the present invention. FIG. 4 is a schematic structural view of a power supply device of an LED driving system according to a first embodiment of the present invention. FIG. 5 is an LED according to a first embodiment of the present invention. FIG. 6 is a circuit diagram of an LED driving system according to a second embodiment of the present invention.

7-10 are schematic diagrams showing the operation of an LED driving system in accordance with an embodiment of the present invention.

In the above figures, the same reference numerals indicate the same, similar or corresponding elements or functions.

Summary of the invention

Specific embodiments of the present invention will be described in detail below by way of embodiments with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of the LED drive system of the present invention.

a rectifying device for connecting an external power source for rectification and power supply;

A power supply device is used to supply power to the load when the drive system is connected to a load.

Specifically, in the embodiment of the present invention, the rectifying device 10 has one end connected to an externally supplied alternating current (AC) power source including a fuse 11, and the other end (output end) 12 connected to the load device 40; 30. When the load system 40 is connected to the drive system, the load device 40 is powered by the rectifier device 10, and the first output end 31 and the second end output end 32 of the power supply device 30 are connected to the load device 40. In Figure 2, an external alternating current (AC) power source (eg, 120 VAC) can be a commercial AC line voltage, and when bridged as shown in Figure 2 (including four unipolar tubes D1, D2, D3, D4) When applied to the rectifying device 10, the input AC voltage can be output as a full-wave rectified voltage, and a suitable current is supplied to the load device 40.

In this paper, an externally supplied AC (AC) power supply containing a fuse 11 has an input voltage range of AC (AC) power supply 120V/5 (T 60Hz to 240V/5 (T 60Hz, input voltage range is DC (DC)) Power supply 12V ~ 400V.

As shown in FIG. 2, in the present solution, the power supply device 30 is specifically an LED buck-boost drive line unit, which includes, but is not limited to, a single or multiple Buck-Boost connection, a Tapped Buck connection, and a Buck connection.

Specifically, in the first embodiment of the present invention, as shown in FIG. 2 and FIG. 3, the power supply device 30 includes a Buck-boost connection module, wherein the Buck-boost connection module:

The Buck-boost connection module includes a second inductor 301, a first electrolytic capacitor 302, a fifth monopole 303, a first switch 304, and a control signal 305, wherein the first end of the second inductor 301 and the first electrolytic capacitor 302 One end is connected to the first end of the control signal 305; the second inductor 301 is connected in parallel with the first electrolytic capacitor 302, and the second end of the second inductor 301 is connected to the first end of the fifth monopole 303 and the first switch 304. The second end of the first electrolytic capacitor 302 is connected to the second end of the fifth monopole 303; the second end of the first switch 304 is connected to the second end of the control signal 305, and the third end of the first switch 304 Can be grounded. The first end and the second end of the first electrolytic capacitor 302 are connected to the load device 40, respectively.

The two output ends of the power supply device and the output of the rectifier device are respectively connected to the load. Further, in the present solution, the output end 12 of the rectifying device and the first output end 31 of the power supply device are respectively connected to the first end 41 and the second end 42 of the load 40, and the second output end 32 of the power supply device and the third end of the load 40 Terminal 43 is connected.

Further, in the present invention, the power supply device 30 may include a single or multiple Buck-boost connection modules.

4 is a schematic structural view of a power supply device of an LED driving system according to a first embodiment of the present invention. Specifically, in the embodiment of the present invention, the power supply device 30 is specifically an LED buck-boost driving circuit unit, and the configuration thereof includes Not limited to single or multiple Tapped Buck connections, ie packages A single or multiple Tapped Buck connection modules are included, and a schematic diagram of the Tapped Buck connection module is shown in FIG. 4:

The Buck-boost connection module includes a sixth monopole 501, a second electrolytic capacitor 502, a transformer 503, a second switch 504, and a control signal 505, wherein the transformer 503 is composed of a mutual inductance third inductor 5031 and a fourth inductor 5032, further In the present solution, the first end of the sixth monopole 501, the first end of the second electrolytic capacitor 502, and the first end of the control signal 505 are connected; the sixth monopole 501 is connected in parallel with the second electrolytic capacitor 502, and The second end of the sixth transistor 501 is connected to the second end of the third inductor 5031 and the first end of the fourth inductor 5032, and the first end of the third inductor 5031 is connected to the first end of the second switch 504. The second end of the second electrolytic capacitor 502 is connected to the second end of the fourth inductor 5032; the second end of the second switch 504 is connected to the second end of the control signal 505, and the third end of the second switch 504 can be grounded. The first end and the second end of the second electrolytic capacitor 502 are respectively connected to the load device 40, and further the load device 40 is also connected to the second end of the power supply device 30.

5 is a schematic structural view of a power supply device of an LED driving system according to a first embodiment of the present invention. Specifically, in a third embodiment of the present invention, the power supply device 30 is specifically an LED buck-boost driving circuit unit, and its constituent form. Including but not limited to single or multiple Buck connections, that is, including single or multiple Buck connection modules, wherein the Buck connection module is shown in Figure 5.

The Buck connection module includes a seventh monopole 601, a third electrolytic capacitor 602, a fifth inductor 603, a third switch 604, and a control signal 605, wherein the first end of the seventh monopole 601 and the third electrolytic capacitor 602 One end is connected to the first end of the control signal 605; the seventh monopole 601 is connected in parallel with the third electrolytic capacitor 602, and the second end of the seventh monopole 601 and the first of the fifth inductor 603 and the third switch 604 are The second end of the third electrolytic capacitor 602 is connected to the second end of the fifth inductor 603; the second end of the third switch 604 is connected to the second end of the control signal 605, and the third end of the third switch 604 is connected Can be grounded. The first end and the second end of the third electrolytic capacitor 602 are respectively connected to the load device 40, and the load device 40 is also connected to the second end of the power supply device 30.

Further, in the present invention, the output current range of the power supply device 30 is 20 mA to 300 mA, and the output voltage range is 12 V to 300 V.

In FIG. 2, specifically in the present solution, the load device 40 is a single or multiple LED groups. The load device 40 can be a light source that includes at least one LED and can include a plurality of LEDs having various electrical connection relationships. In FIG. 2, a plurality of LEDs constituting the load device 40 are connected in series The state is shown, but the plurality of LEDs included in the load device 40 can also be electrically connected in a hybrid connection structure connected in series or in parallel or in series and parallel depending on the application system to which the LED is applied.

In a second embodiment of the present invention, a filtering device 20 is further included, as shown in FIG. 6: a rectifying device 10 having one end connected to an externally supplied alternating current (AC) power source including a fuse 11, and the other end Connected to the filtering device 20; the filtering device 20 receives the rectified voltage from the rectifying device 10, the other end of the filtering device 20 is connected to the power supply device 30; the power supply device 30 receives the filtered voltage from the output of the filtering device 20, and the power supply device 30 The first end output 31 and the second end output 32 are coupled to the load device 40; and the load device 40 receives power from the power supply device 30 for driving the single or plurality of LED groups.

In Fig. 6, one end of the rectifying device 10 can be connected to an alternating current (AC) power source, and the other end of the rectifying device 10 can be connected to the filtering device 20. An external alternating current (AC) power source (eg, 120VAC) can be a commercial AC line voltage, and the bridge diode (including four monopoles D1, D2, D3, D4) is applied to the rectifier as shown in FIG. At 10 o'clock, the input AC voltage can be output as a full-wave rectified voltage. The voltage rectified in the rectifying device 10 can be input to the filtering device 20, and a suitable current is supplied to the load device 40.

In FIG. 6, the filtering device 20 includes a first capacitor 201, a second capacitor 202, and a first inductor 203. The first end of the first inductor 203 and one end of the bridge diode in the rectifying device 10 and the first end of the first capacitor 201 The first end of the first inductor 203 is connected to the first end of the power supply device 30 and the first end of the second capacitor 202; the second end of the first capacitor 201 and the second end of the second capacitor 202 are respectively grounded.

The power supply device 30 of the second embodiment of the present invention is specifically an LED buck-boost drive line unit, which includes, but is not limited to, a single or multiple Buck-Boost connection, a Tapped Buck connection, and a Buck connection. The output end 12 of the rectifying device 10 and the first output end 31 of the power supply device are respectively connected to the first end 41 and the second end 42 of the load 40, and the second output end 32 of the power supply device is connected to the third end 43 of the load 40.

7-10 are schematic diagrams showing the operation of an LED driving system in accordance with an embodiment of the present invention. The power supply device 30 supplies power to the load in conjunction with the rectifying device 10 when the load system is connected to the drive system; the unit with energy storage and release power supplies the load device 40 under the control of the control signal 305. The output end 12 of the rectifying device and the first output end 31 of the power supply device are respectively connected to the first end 41 and the second end 42 of the load 40, and the second output end 32 of the power supply device and the third end 43 of the load 40 are respectively connected. connection.

As shown in FIG. 7, when the power source Vin is energized, the current sequentially passes through the output terminal 12 of the rectifying device 10, the first end 41 and the second end 42 of the load device, and then the first end output terminal 31 of the power supply device 30 is a control signal. The power is supplied to the 305, and after the control signal 305 is activated, it starts to control and controls the first switch 304 to be turned on and off.

As shown in FIG. 8, after the first switch 304 is turned on, current flows through the output terminal 12 of the rectifying device 10, the first end 41 and the second end 42 of the load device, and then flows through the first end output terminal 31 of the power supply device 30. After the second inductor 301, and then through the first switch 304, then the second inductor 301 begins to store energy.

As shown in FIG. 9, the first switch 304 is turned off, the second inductor 301 starts to release energy, and a current is generated to charge the first electrolytic capacitor 302 through the fifth monopole 303, and the current passes through the output end of the second end of the power supply device 30. 32. The third end 43 and the second end 42 of the load device, and the first end output end 31 of the power supply device 30 supplies power to the semiconductor light source load (LED load), that is, the load device 40.

As shown in FIG. 10, the first switch 304 is turned on, current flows through the output terminal 12 of the rectifying device 10, the first end 41 and the second end 42 of the load device, and then passes through the first end output terminal 31 of the power supply device 30, and then Flowing through the second inductor 301, the first switch 304, the second inductor 301 starts to store energy, and the first electrolytic capacitor 302 passes through the second end output end 32 of the power supply device 30, the third end 43 of the load device, and the second end 42, The first end output 31 of the power supply unit 30 supplies power to the semiconductor light source load (LED load), i.e., the load device 40.

The above embodiments are merely illustrative, and they are not intended to limit the technical methods of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments thereof, those skilled in the art will understand that the technical methods of the present invention may be modified or equivalently substituted without departing from the spirit and scope of the method of the present invention. Substitutions also fall within the scope of protection of the claims of the present invention.

Claims

Rights request

1. A multi-output LED drive system comprising:

a rectifying device, configured to connect an external power source, perform rectification and power supply;

a power supply device, configured to supply power to the load when the LED driving system is connected to a load;

It is characterized in that

The two output terminals of the power supply device and the output of the rectifier device are respectively connected to the load.

2. The LED drive system of claim 1 wherein:

The rectifier device is connected to an external power source and includes a fuse.

When the external power source is an AC power source, the input voltage range is 120V/50~60Hz~240V/5 (T 60Hz,

When the external power source is a DC power source, the input voltage ranges from 12V to 400V.

3. The LED drive system of claim 1 wherein:

The rectifier device includes a bridge diode for rectification.

4. The LED drive system of claim 1 wherein:

The power supply device includes a single or multiple LED buck-boost drive line units.

5. The LED drive system of claim 4, wherein

The LED buck-boost drive line unit includes, but is not limited to, a Buck-boost unit and/or a Tapped Buck unit and/or a Buck unit.

6. The LED drive system of claim 1 wherein:

The power supply device further includes a control unit and an energy storage and release unit.

The control unit is coupled to the energy storage and release unit and is configured to control energy storage and energy release of the energy storage and release unit.

7. The LED drive system of claim 1 wherein:

Further comprising a filtering device, the filtering device is coupled to the rectifying device for receiving and filtering a rectified voltage from the rectifying device, the filtering device being an electromagnetic compatibility filtering circuit.

8. The LED drive system of claim 6 wherein:

The power supply device supplies power to the load when the drive system is connected to a load, and the energy storage and release unit supplies power to the load under the control of the control unit.

9. The LED drive system of claim 1 wherein:

Further, the LED driving system includes three output terminals.

10. The drive system of claim 1 wherein:

Further, the output end of the rectifying device and the first output end of the power supply device are respectively connected to the first end and the second end of the load, and the second output end of the power supply device and the third end of the load connection.

11. A semiconductor lighting device comprising:

Semiconductor light source load;

a power supply device, configured to supply power to the load when the LED drive system is connected to a load;

It is characterized in that

The semiconductor lighting device of claim 11, wherein

13. A semiconductor lighting device according to claim 12, wherein

The power supply device supplies power to the load in cooperation with the rectifying device, and the energy storage dissipating unit supplies power to the semiconductor light source load under the control of the control unit.

14. The semiconductor lighting device of claim 11 wherein:

The load is a single or multiple LED groups.

The semiconductor lighting device of claim 14, wherein

The configuration of the single or multiple LED groups includes, but is not limited to, a series connection or a parallel connection or a serial connection structure in which the serial connection is electrically connected.

16. The semiconductor lighting device of claim 11 wherein: