CN110719669A - High-power LED drive circuit applied to high-speed communication - Google Patents
High-power LED drive circuit applied to high-speed communication Download PDFInfo
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- CN110719669A CN110719669A CN201910942963.6A CN201910942963A CN110719669A CN 110719669 A CN110719669 A CN 110719669A CN 201910942963 A CN201910942963 A CN 201910942963A CN 110719669 A CN110719669 A CN 110719669A
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- laser diode
- driving chip
- circuit
- diode driving
- speed communication
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- 238000004891 communication Methods 0.000 title claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 abstract description 2
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
- Led Devices (AREA)
Abstract
The invention discloses a high-power LED drive circuit applied to high-speed communication, which comprises a controller MCU, a voltage following circuit, a laser diode drive chip and a power supply, wherein the controller MCU is used for controlling the voltage following circuit to output a driving voltage; the controller MCU outputs a current control signal and is connected to a current gain end of the laser diode driving chip; the controller MCU outputs an enabling signal which is connected to an enabling end of the laser diode driving chip through the voltage following circuit, and the laser diode driving chip controls the on-off of an external LED light source; the power supply is respectively connected with the MCU, the voltage following circuit, the laser diode driving chip and the external LED light source and used for supplying power. The driving circuit realizes wireless optical high-speed communication, has the functions of constant current output, adjustable output current and the like, and has the characteristics of strong applicability, large output current and simple circuit.
Description
Technical Field
The invention relates to a driving circuit, in particular to a high-power LED driving circuit applied to high-speed communication.
Background
The underwater wireless communication technology is very critical to human development and utilization of ocean resources, and plays an increasingly important role in military application and commercial development. The traditional underwater acoustic communication technology is widely applied to remote communication application, but has a plurality of problems, such as low communication speed, long delay, multipath interference and the like, and the application of the underwater acoustic communication technology is limited along with the gradual improvement of the application requirements of underwater near field communication.
The LED light source driving circuit occupies a very important position in visible light communication, most of driving circuits are driven by MOS tubes, the switching speed is low, and the on-resistance exists, so that the power conversion efficiency is reduced.
Disclosure of Invention
The invention aims to provide a high-power LED driving circuit applied to high-speed communication for underwater visible light communication, and solves the problems of low switching speed and low power conversion efficiency of the conventional driving circuit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a high-power LED drive circuit applied to high-speed communication, which comprises a controller MCU, a voltage following circuit, a laser diode drive chip and a power supply, wherein the controller MCU is used for controlling the voltage following circuit to output a driving voltage;
the controller MCU outputs a current control signal and is connected to a current gain end of the laser diode driving chip;
the controller MCU outputs an enabling signal which is connected to an enabling end of the laser diode driving chip through the voltage following circuit, and the laser diode driving chip controls the on-off of an external LED light source;
the power supply is respectively connected with the MCU, the voltage following circuit, the laser diode driving chip and the external LED light source and used for supplying power.
Further, the laser diode driving chip includes a parallel mode of 6 enable control pins and a parallel mode of 6 current gain control pins.
Further, the controller MCU is an MSP430 single chip microcomputer, the MSP430 single chip microcomputer outputs high-speed pulse signals through a communication coding end and sends the high-speed pulse signals to 6 enabling control pins of the laser diode driving chip through the voltage following chip, and an external LED light source is controlled to emit light or be turned off;
the analog voltage output end of the MSP430 singlechip outputs analog voltage signals and directly sends the analog voltage signals to 6 current gain control pins of the driving chip, so that the laser diode driving chip outputs corresponding current.
Furthermore, a filter circuit is arranged between the power supply and the external LED light source; the filter circuit is composed of capacitors C2, C3 and L1.
Further, the voltage follower circuit includes an operational amplifier AD 805; the high-speed pulse signal output by the MSP430 singlechip is input from the homodromous input end of the operational amplifier AD805, and the reverse input end pin and the output end pin of the operational amplifier AD805 are short-circuited to output the pulse signal.
Furthermore, the magnitude of the analog voltage signal is 0-2.5V.
Compared with the prior art, the invention has the beneficial effects that:
the controller MCU is matched with the laser diode driving chip, the driving frequency can reach 200MHz at most, the requirement of underwater high-speed visible light communication is met, the single-channel output current of the chip can reach 1.5A at most, and the output current can reach 9A when 6 channels are used in parallel, so that the driving of a high-power LED light source can be realized, and the driving device is applied to the driving of an underwater wireless light communication light source.
The laser diode driving chip of the invention realizes the wireless optical high-speed communication by enabling the control end to rapidly open or close the chip output function, and has the functions of constant current output, adjustable output current and the like.
The circuit can be used for driving the LED and the laser diode, and has the advantages of wide application, low cost, simple circuit and convenient use.
Drawings
FIG. 1 is a functional block diagram of the present invention;
fig. 2 is a circuit configuration diagram of the present invention.
The reference numbers are as follows:
the LED driving circuit comprises a controller MCU (microprogrammed control Unit), a 2-voltage following circuit, a 3-laser diode driving chip, a 4-LED light source and a 5-power supply.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, a high power LED driving circuit for high speed communication according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It should be noted that: the drawings are in simplified form and are not to precise scale, the intention being solely for the convenience and clarity of illustrating embodiments of the invention; secondly, the structures shown in the drawings are often part of the actual structure; again, the drawings may require different emphasis, sometimes on different proportions.
As shown in fig. 1, the basic circuit structure of the present invention includes a controller MCU1, a voltage follower circuit 2, a laser diode driver chip 3, and a power supply 5. The power supply 5 respectively supplies power to the controller MCU1, the voltage follower circuit 2, the laser diode driving chip 3 and the external LED light source 4; according to the output power requirement, the controller MCU1 outputs a current control signal, which is connected to the current gain end of the laser diode driving chip 3; meanwhile, the MCU1 outputs an enable signal according to a communication coding format, and the enable signal is connected to an enable end of the laser diode driving chip 3 through the voltage following circuit 2 to control the on-off of the LED light source 4.
The controller MCU1 has two functions:
the first is that whether the chip outputs current is controlled by the enable terminal of the laser diode driving chip 3, if the control signal of the controller MCU1 is high level, the current is output, and if the control signal is low level, the current is not output.
Secondly, the output current of the laser diode driving chip 3 is adjusted, the analog voltage output end of the controller MCU1 outputs different voltage values, and the laser diode driving chip 3 is controlled to output different current values.
The voltage following circuit 2 is used for improving the load capacity of the output signal of the controller MCU, ensuring the driving capacity when the distance between the controller MCU and the driving chip is far away, and enabling control signals output by the controller MCU are connected to an enabling end of the driving chip through the voltage following circuit.
The laser diode driving chip 2 adopts IC-HG, the chip has output enabling control and current gain control functions, the switching speed of the chip can be changed according to communication requirements, high-speed communication is realized, the size of driving current can be changed, and the output power is controlled. The laser diode driving chip comprises 6 parallel output channels which can respectively drive 6 channels of LED light sources, and the 6 channels can also be connected in parallel for use, so that the output current is further increased, and the power of the LED light sources is improved.
The preferred embodiment of the present invention is shown in fig. 2, D1 is an LED, and is discussed below in conjunction with the accompanying drawings:
as shown in fig. 2, the driving chip in this embodiment is an IC-HG type, and the 6 channels of the driving chip are connected in parallel. The controller MCU is an MSP430 singlechip, a P1.0 port of the singlechip outputs a high-speed pulse signal according to communication codes, the pulse signal is connected to a pin 3 of a homodromous input end of the AD805, and a pin 2 of an AD805 reverse input end and a pin of an output end of the AD805 are in short circuit 1 to output the pulse signal. The pulse signals are connected to 6 enable control pins (serial numbers 14, 15, 16, 17, 20 and 21 shown in fig. 2) of the driving chip IC-HG, when the pulse signals are at a high level, the driving chip IC-HG outputs a high level to enable the LED to emit light, and when the pulse signals are at a low level, the driving chip IC-HG outputs a low level to disable the LED to emit light.
The MSP430 single chip microcomputer P6.7 end is an analog voltage output end, controls the magnitude of output current, and can output 0-2.5V analog voltage, the output voltage signal is connected to a current gain control end ( serial numbers 1, 2, 3, 5, 6 and 7 shown in figure 2) of the drive chip IC-HG, and the drive chip IC-HG outputs corresponding current according to the magnitude of the analog voltage signal.
In fig. 2, VCC is an LED driving power supply, VCC in this embodiment is 12V, capacitors C2, C3, and L1 constitute a filter circuit, and the sizes of C2, C3, and L1 can be calculated according to the noise spectrum range of the power VCC; the capacitors C2, C3 and L1 form a filter circuit for reducing power supply ripple noise, improving the stability of output current and realizing the stable output of the light source.
The resistor R1 is 10k, the capacitors C1 and C4 are filter capacitors, the capacitance value is 100nF, the capacitors C5, C6 and L2 form a filter circuit, and the sizes of C5, C6 and L2 can be calculated according to the noise spectrum range of the 5V power supply.
Finally, it should be noted that the above description is only for describing the preferred embodiments of the present invention, and not for limiting the scope of the present invention, and that any changes and modifications made by those skilled in the art according to the above disclosure are all within the scope of the appended claims.
Claims (6)
1. A high-power LED drive circuit applied to high-speed communication is characterized in that: the device comprises a controller MCU, a voltage following circuit, a laser diode driving chip and a power supply;
the controller MCU outputs a current control signal and is connected to a current gain end of the laser diode driving chip;
the controller MCU outputs an enabling signal which is connected to an enabling end of the laser diode driving chip through the voltage following circuit, and the laser diode driving chip controls the on-off of an external LED light source;
the power supply is respectively connected with the MCU, the voltage following circuit, the laser diode driving chip and the external LED light source and used for supplying power.
2. The high-power LED driving circuit applied to high-speed communication according to claim 1, wherein: the laser diode driving chip comprises a mode that 6 enabling control pins are parallel and 6 current gain control pins are parallel.
3. The high-power LED driving circuit applied to high-speed communication according to claim 1, wherein: the MCU is an MSP430 singlechip, the MSP430 singlechip outputs high-speed pulse signals through a communication coding end and sends the high-speed pulse signals to 6 enabling control pins of the laser diode driving chip through the voltage following chip, and an external LED light source is controlled to emit light or be extinguished;
the analog voltage output end of the MSP430 singlechip outputs analog voltage signals and directly sends the analog voltage signals to 6 current gain control pins of the driving chip, so that the laser diode driving chip outputs corresponding current.
4. The high-power LED driving circuit applied to high-speed communication according to claim 1, wherein: a filter circuit is arranged between the power supply and the external LED light source; the filter circuit is composed of capacitors C2, C3 and L1.
5. The high-power LED driving circuit applied to high-speed communication according to claim 1, wherein: the voltage follower circuit comprises an operational amplifier AD 805; the high-speed pulse signal output by the MSP430 singlechip is input from the homodromous input end of the operational amplifier AD805, and the reverse input end pin and the output end pin of the operational amplifier AD805 are short-circuited to output the pulse signal.
6. The high-power LED driving circuit applied to high-speed communication according to claim 1, wherein: the magnitude of the analog voltage signal is 0-2.5V.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942963.6A CN110719669A (en) | 2019-09-30 | 2019-09-30 | High-power LED drive circuit applied to high-speed communication |
| CN202010858199.7A CN112013772B (en) | 2019-09-30 | 2020-08-24 | Pose determination method for unmanned underwater vehicle |
| CN202010858715.6A CN112013773B (en) | 2019-09-30 | 2020-08-24 | Recovery system and recovery method for unmanned underwater vehicle |
| CN202010859410.7A CN112013774B (en) | 2019-09-30 | 2020-08-24 | Distance measuring system and distance measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942963.6A CN110719669A (en) | 2019-09-30 | 2019-09-30 | High-power LED drive circuit applied to high-speed communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110719669A true CN110719669A (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910942963.6A Withdrawn CN110719669A (en) | 2019-09-30 | 2019-09-30 | High-power LED drive circuit applied to high-speed communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110719669A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245608A (en) * | 2021-12-21 | 2022-03-25 | 深圳市三角铁科技有限公司 | Integrated circuit for laser chip removal |
| CN116054960A (en) * | 2023-04-03 | 2023-05-02 | 南昌大学 | PoE power supply-based visible light communication system power control method and system |
-
2019
- 2019-09-30 CN CN201910942963.6A patent/CN110719669A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245608A (en) * | 2021-12-21 | 2022-03-25 | 深圳市三角铁科技有限公司 | Integrated circuit for laser chip removal |
| CN116054960A (en) * | 2023-04-03 | 2023-05-02 | 南昌大学 | PoE power supply-based visible light communication system power control method and system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200121 |
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| WW01 | Invention patent application withdrawn after publication |