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CN112188686B - A single-stage LED driver circuit integrating visible light communication lamps - Google Patents

A single-stage LED driver circuit integrating visible light communication lamps Download PDF

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CN112188686B
CN112188686B CN202011189648.XA CN202011189648A CN112188686B CN 112188686 B CN112188686 B CN 112188686B CN 202011189648 A CN202011189648 A CN 202011189648A CN 112188686 B CN112188686 B CN 112188686B
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visible light
output
led lamp
light communication
led
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CN112188686A (en
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林维明
许志钬
林慧聪
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Fuzhou University
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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Abstract

本发明涉及一种集成可见光通信灯的单级LED驱动电路，包括单相交流输入电源、单相整流桥、第一功率开关管、第二功率开关管、第一功率二极管、第二功率二极管、可见光通信LIFI‑LED灯、第一电感、第二电感、第一输出储能电容、第二输出储能电容、输出滤波电容、中间电容、高频变压器和照明LED灯负载，所述高频变压器包含原边绕组、副边主绕组和副边辅助绕组；本发明分别独立采用可见光通信LIFI‑LED灯和照明LED灯，第一功率开关管调节控制照明LED灯，第二功率开关管调节控制可见光通信LIFI‑LED灯，其采用瞬时电流反馈闭环调制方法，并有机集成为单级LED驱动电路，解决了恒定照明强度和调制频率冲突的问题，满足照明LED所需的工作电流和LIFI‑LED的带宽的开关频率以提高通信数据速率。

Figure 202011189648

The invention relates to a single-stage LED driving circuit integrating a visible light communication lamp, comprising a single-phase AC input power supply, a single-phase rectifier bridge, a first power switch tube, a second power switch tube, a first power diode, a second power diode, Visible light communication LIFI‑LED lamp, first inductor, second inductor, first output energy storage capacitor, second output energy storage capacitor, output filter capacitor, intermediate capacitor, high frequency transformer and lighting LED lamp load, the high frequency transformer It includes a primary winding, a secondary main winding and a secondary auxiliary winding; the present invention independently adopts the visible light communication LIFI-LED lamp and the lighting LED lamp, the first power switch tube adjusts and controls the lighting LED lamp, and the second power switch tube adjusts and controls the visible light The communication LIFI‑LED lamp adopts the instantaneous current feedback closed-loop modulation method and is organically integrated into a single-stage LED driving circuit, which solves the problem of constant lighting intensity and modulation frequency conflict, and meets the working current required by the lighting LED and the LIFI‑LED bandwidth of the switching frequency to increase the communication data rate.

Figure 202011189648

Description

Single-stage LED drive circuit integrated with visible light communication lamp
Technical Field
The invention belongs to the technical field of LED lighting driving power supplies and visible light communication, and particularly relates to a single-stage LED driving circuit integrated with a visible light communication lamp.
Background
The LED is one of the fourth generation electric light sources with wide prospect due to the characteristics of high efficiency, energy conservation and environmental protection. Because of its steep volt-ampere characteristics, constant current control must be employed to achieve the best lighting effect. Therefore, the method has important practical significance for the research of the LED driving circuit with high efficiency, high power factor and low ripple.
The visible light communication technology is a novel wireless communication mode which is rapidly developed in the last decade, and a visible light wireless communication network can be constructed by adding a data transmission additional function on a public infrastructure illumination facility and combining communication with an illumination light source, so that wireless transmission of information from a server to a client is realized. In this case, the LED has great advantages as a light source compared to incandescent lamps and fluorescent lamps, and thus the frequency response of the LED provides sufficient bandwidth for many applications to transmit digital data at high speed. However, the problem of conflict between constant illumination intensity and modulation frequency exists in the existing VLC modulation method, and how to be compatible with visible light communication and LED illumination characteristics is an important subject for developing VLC technology.
Disclosure of Invention
The invention aims to provide a single-stage LED driving circuit integrated with a visible light communication lamp, which integrates the visible light communication lamp and an illumination LED lamp on the same LED driving circuit.
In order to achieve the purpose, the invention adopts the technical scheme that: a single-stage LED drive circuit integrated with a visible light communication lamp comprises a single-phase AC input power supply uinA single-phase rectifier bridge DB and a first power switch tube S1A second power switch tube S2A first power diode D1A second power diode D2Visible light communication LED lamp LIFI-LED and first inductor L1A second inductor L2A first output energy storage capacitor CS1A second output energy storage capacitor CS2An output filter capacitor CO2An intermediate capacitor CnThe high-frequency transformer Tx comprises a primary winding Np, a secondary main winding Ns1 and a secondary auxiliary winding Ns 2;
the single-phase AC input power uinThe two input ends of the single-phase rectifier bridge DB are respectively connected with the two alternating current input ends of the single-phase rectifier bridge DB, the positive output end of the direct current side of the single-phase rectifier bridge DB is connected with the dotted end of the primary winding Np of the high-frequency transformer Tx, and the negative output end of the direct current side of the single-phase rectifier bridge DB is connected with the first power switch tube S1The source electrodes of the two-way transistor are connected; the primary winding Np non-dotted terminal of the high-frequency transformer Tx and the first power switch tube S1The drain electrodes of the two electrodes are connected; the non-dotted terminal of the secondary primary winding Ns1 of the high-frequency transformer Tx and the first power diode D1Is connected to the anode of the high-frequency transformer Tx, the same-name end of the secondary primary winding Ns1 of the high-frequency transformer Tx is connected to the first output energy-storage capacitor CS1Negative polarity terminal of, the output filter capacitor CO2One end of the second power switch tube S2The source electrode of the LED lamp is connected with the negative end of the LIFI-LED lamp; the first power diode D1And the first output energy storage capacitor CS1The positive polarity end of the LED lamp is connected with the anode of the lighting LED lamp load; the non-dotted terminal of the secondary auxiliary winding Ns2 of the high frequency transformer Tx and the second power diode D2Is connected to the anode of the high-frequency transformer Tx, the homonymous terminal of the secondary auxiliary winding Ns2 of the high-frequency transformer Tx and the second output energy-storage capacitor CS2Negative polarity terminal of, the second inductance L2One terminal of, the output filter capacitor CO2The other end of the LED lamp is connected with the cathode of the lighting LED lamp load; the second power diode D2And the second output capacitor CS2Positive terminal and first inductor L1Is connected to one end of the first inductor L1And the other end of the first power switch tube S2And the intermediate capacitor CnIs connected to one end of the intermediate capacitor CnThe other end of the second inductor L2 is connected with the positive end of the visible light communication LED lamp LIFI-LED and the other end of the second inductor L2.
Further, the single-stage LED driving circuit of an integrated visible light communication lamp according to claim 1, wherein: the visible light communication LED lamp LIFI-LED adopts an instantaneous current feedback closed-loop modulation method, which comprises the following steps:
step 1: the sum of the brightness parameter B-L required by visible light communication and the brightness parameter B-VLC corresponding to the visible light communication data forms the total light output P-optical of the communication LED lamp LIFI-LED;
step 2: obtaining an output instantaneous current reference quantity io-ref by a total light output P-optical and an LIFI-LED lamp current transfer function K(s); sampling instantaneous current feedback output by an LIFI-LED lamp;
and step 3: a closed loop feedback compensation network is formed by the instantaneous feedback current io, the current reference amount io-ref and the error amplifier OP; obtaining a second power switch tube S through a PWM modulation unit2The duty ratio adjusts the visible light communication brightness of the LIFI-LED lamp and the current required by data communication.
Further, the single-phase AC input power uinA single-phase rectifier bridge DB, a first power switch tube S1A high frequency transformer Tx, a first power diode D1A first output energy storage capacitor CS1A second power diode D2And a second output energy storage capacitor CS2A Flyback circuit for forming double winding output; the second output energy storage capacitor CS2A second power switch tube S2Visible light communication LED lamp LIFI-LED and second inductor L2An intermediate capacitor CnAnd an output filter capacitor CO2Forming a Step-down Cuk circuit.
Further, the first power switch tube S1A second power switch tube S2All are power MOSFET tubes; two power MOSFET transistors S1、S2Of different operating frequencies, S2Operating frequency ratio S of1High.
Further, the first power diode D1The second power diode D2 is a power semiconductor fast recovery diode.
Further, the first output energy storage capacitor CS1A second output energy storage capacitor CS2All are energy storage electrolytic capacitors, the output filter capacitor CO2An intermediate capacitor CnAre all high frequency capacitors.
Further, the high frequency transformer Tx is a flyback high frequency transformer, and its primary winding Np is opposite to the terminals with the same name of the secondary main winding Ns1 and the secondary auxiliary winding Ns 2.
Compared with the prior art, the invention has the following beneficial effects: the invention respectively and independently adopts the visible light communication lamp LIFI-LED and the illumination LED lamp, and organically integrates the visible light communication lamp LIFI-LED and the illumination LED lamp into the same LED drive circuit, and the communication LIFI-LED lamp adopts an instantaneous current feedback closed-loop modulation method, thereby solving the problem of conflict between constant illumination intensity and modulation frequency, and meeting the working current required by the illumination LED and the switching frequency of the bandwidth of the LIFI-LED so as to improve the data rate. Therefore, the invention has important practical significance.
Drawings
Fig. 1 is a circuit schematic of an embodiment of the invention.
Fig. 2 is a schematic diagram of an instantaneous current feedback closed-loop modulation method adopted by the communication LIFI-LED lamp in the embodiment of the present invention.
Fig. 3 shows a first mode of operation of the circuit according to an embodiment of the invention.
Fig. 4 shows a second mode of operation of the circuit according to the embodiment of the invention.
Fig. 5 shows a third mode of operation of the circuit according to an embodiment of the invention.
Fig. 6 shows a fourth mode of operation of the circuit according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in FIG. 1, the invention provides a single-stage LED driving circuit of an integrated visible light communication lamp, which comprises a single-phase alternating current input power supply uinA single-phase rectifier bridge DB and a first power switch tube S1A second power switch tube S2A first power diode D1A second power diode D2Visible light communication LED lamp LIFI-LED and first inductor L1A second inductor L2A first output energy storage capacitor CS1A second output energy storage capacitor CS2An output filter capacitor CO2An intermediate capacitor CnThe high-frequency transformer Tx comprises a primary winding Np, a secondary main winding Ns1 and a secondary auxiliary winding Ns 2.
The single-phase AC input power uinThe two input ends of the single-phase rectifier bridge DB are respectively connected with the two alternating current input ends of the single-phase rectifier bridge DB, the positive output end of the direct current side of the single-phase rectifier bridge DB is connected with the dotted end of the primary winding Np of the high-frequency transformer Tx, and the negative output end of the direct current side of the single-phase rectifier bridge DB is connected with the first power switch tube S1The source electrodes of the two-way transistor are connected; the primary winding Np non-dotted terminal of the high-frequency transformer Tx and the first power switch tube S1The drain electrodes of the two electrodes are connected; the non-dotted terminal of the secondary primary winding Ns1 of the high-frequency transformer Tx and the first power diode D1Is connected to the anode of the high-frequency transformer Tx, the same-name end of the secondary primary winding Ns1 of the high-frequency transformer Tx is connected to the first output energy-storage capacitor CS1Negative polarity terminal ofOutput filter capacitor CO2One end of the second power switch tube S2The source electrode of the LED lamp is connected with the negative end of the LIFI-LED lamp; the first power diode D1And the first output energy storage capacitor CS1The positive polarity end of the LED lamp is connected with the anode of the lighting LED lamp load; the non-dotted terminal of the secondary auxiliary winding Ns2 of the high frequency transformer Tx and the second power diode D2Is connected to the anode of the high-frequency transformer Tx, the homonymous terminal of the secondary auxiliary winding Ns2 of the high-frequency transformer Tx and the second output energy-storage capacitor CS2Negative polarity terminal of, the second inductance L2One terminal of, the output filter capacitor CO2The other end of the LED lamp is connected with the cathode of the lighting LED lamp load; the second power diode D2And the second output capacitor CS2Positive terminal and first inductor L1Is connected to one end of the first inductor L1And the other end of the first power switch tube S2And the intermediate capacitor CnIs connected to one end of the intermediate capacitor CnThe other end of the second inductor L2 is connected with the positive end of the visible light communication LED lamp LIFI-LED and the other end of the second inductor L2.
In this embodiment, the visible light communication LED lamp LIFI-LED adopts an instantaneous current feedback closed-loop modulation method, which includes the following steps:
step 1: the sum of the brightness parameter B-L required by visible light communication and the brightness parameter B-VLC corresponding to the visible light communication data forms the total light output P-optical of the communication LED lamp LIFI-LED;
step 2: obtaining an output instantaneous current reference quantity io-ref by a total light output P-optical and an LIFI-LED lamp current transfer function K(s); sampling instantaneous current feedback output by an LIFI-LED lamp;
and step 3: a closed loop feedback compensation network is formed by the instantaneous feedback current io, the current reference amount io-ref and the error amplifier OP; obtaining a second power switch tube S through a PWM modulation unit2The duty ratio adjusts the visible light communication brightness of the LIFI-LED lamp and the current required by data communication.
In the present embodiment, the single-phase ac input power uinSingle phase rectifierCurrent bridge DB, first power switch tube S1A high frequency transformer Tx, a first power diode D1A first output energy storage capacitor CS1A second power diode D2And a second output energy storage capacitor CS2A Flyback circuit for forming double winding output; the second output energy storage capacitor CS2A second power switch tube S2Visible light communication LED lamp LIFI-LED and second inductor L2An intermediate capacitor CnAnd an output filter capacitor CO2Forming a Step-down Cuk circuit. The working modes of the Flyback circuit comprise a DCM mode, a BCM mode and a CCM mode; the working mode of the Step-down Cuk circuit is a CCM mode.
In this embodiment, the first power switch S1A second power switch tube S2Are all power MOSFET tubes.
In this embodiment, the first power diode D1The second power diode D2 is a power semiconductor fast recovery diode.
In this embodiment, the first output energy storage capacitor CS1A second output energy storage capacitor CS2All are energy storage electrolytic capacitors, the output filter capacitor CO2An intermediate capacitor CnAre all high frequency capacitors.
In this embodiment, the high frequency transformer Tx is a flyback high frequency transformer, and its primary winding Np is opposite to the terminals with the same name of the secondary main winding Ns1 and the secondary auxiliary winding Ns 2.
The first power switch tube S1 and the second power switch tube S2 work independently, and two paths of mutually independent PWM signals generated by a control circuit are respectively controlled; the first power switch tube S1 controls the lighting LED lamp load in a closed-loop constant current mode, and the second power switch tube S2 controls the brightness and communication data of the visible light communication lamp LIFI-LED to be adjusted by adopting an instantaneous current feedback closed-loop modulation method.
It should be noted that, in the present embodiment, two power MOSFET transistors S1、S2Of different operating frequencies, S2Operating frequency ratio S of1High.
In the present embodimentThe lighting LED lamp is driven by a flyback converter to be controlled in a constant current mode, and the visible light communication LED lamp LIFI-LED adopts an instantaneous current feedback closed-loop modulation method through a partial power Step-down Cuk circuit. The communication modulation principle is shown in figure 2, and the sum of a luminance brightness parameter B-L required by communication and a luminance brightness parameter B-VLC corresponding to visible light communication data forms LIFI-LED lamp total light output P-optical; obtaining an output instantaneous current reference quantity io-ref by a total light output P-optical and an LIFI-LED lamp current transfer function K(s); sampling instantaneous current feedback io output by the LIFI-LED lamp; a closed loop feedback compensation network is formed by the instantaneous feedback current io, the current reference amount io-ref and the error amplifier OP; obtaining a second power MOS switching tube S through a PWM modulation unit2The duty ratio adjusts the visible light communication brightness of the LIFI-LED lamp and the current required by data communication.
As shown in fig. 3 to fig. 6, the present embodiment further provides a specific circuit operation mode of the single-stage LED driving circuit of the integrated visible light communication lamp.
As shown in fig. 3, the power MOSFET transistor S1Conducting power MOSFET S2And conducting. At this time, the single-phase AC input power uinCharging a primary side excitation inductor of the high-frequency transformer Tx through the single-phase rectifier bridge DB; diode D1、D2Cut off due to the reverse voltage; output energy storage electrolytic capacitor CS1、CS2Providing energy to the load. Inductor L1Through power MOSFET tube S2Discharging to the load. Intermediate capacitor CnThrough power MOSFET tube S2And an output filter capacitor CO2For inductor L2And (6) charging.
As shown in fig. 4, the power MOSFET transistor S1Conducting power MOSFET S2And (6) cutting off. At this time, the single-phase AC input power uinCharging a primary side excitation inductor of the high-frequency transformer Tx through the single-phase rectifier bridge DB; diode D1、D2Cut off due to the reverse voltage; output energy storage electrolytic capacitor CS1、CS2Providing energy to the load. Inductor L1Supplying power to a visible light communication LED lamp LIFI-LED through an output filter capacitor CO2To the intermediate capacitor CnAnd (6) charging. Inductor L2Through diode D3And an output filter capacitor CO2And (4) discharging.
As shown in fig. 5, the power MOSFET transistor S1Cut-off, power MOSFET tube S2And conducting. At this time, the diode D1、D2The energy stored in the primary side excitation inductor of the high-frequency transformer Tx is released to the secondary side to supply energy to the load due to the conduction of the high-frequency transformer Tx when the high-frequency transformer is subjected to the forward voltage. Inductor L1Through power MOSFET tube S2Discharging to the load. Intermediate capacitor CnThrough power MOSFET tube S2And an output filter capacitor CO2For inductor L2And (6) charging.
As shown in fig. 6, the power MOSFET transistor S1Cut-off, power MOSFET tube S2And (6) cutting off. At this time, the diode D1、D2The energy stored in the primary side excitation inductor of the high-frequency transformer Tx is released to the secondary side to supply energy to the load due to the conduction of the high-frequency transformer Tx when the high-frequency transformer is subjected to the forward voltage. Inductor L1Through diode D3And an output filter capacitor CO2To the intermediate capacitor CnAnd (6) charging. Inductor L2Supplying power to a visible light communication LED lamp LIFI-LED through an output filter capacitor CO2And (4) discharging.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.

Claims (6)

1.一种集成可见光通信灯的单级LED驱动电路，其特征在于：包括单相交流输入电源uin、单相整流桥DB、第一功率开关管S1、第二功率开关管S2、第一功率二极管D1、第二功率二极管D2、可见光通信LED灯LIFI-LED、第一电感L1、第二电感L2、第一输出储能电容CS1、第二输出储能电容CS2、输出滤波电容CO2、中间电容Cn、高频变压器Tx和照明LED灯负载，所述高频变压器Tx包含原边绕组Np、副边主绕组Ns1和副边辅助绕组Ns2；1. A single-stage LED drive circuit integrating a visible light communication lamp is characterized in that: comprising a single-phase AC input power supply u in , a single-phase rectifier bridge DB, a first power switch tube S 1 , a second power switch tube S 2 , The first power diode D 1 , the second power diode D 2 , the visible light communication LED lamp LIFI-LED, the first inductor L 1 , the second inductor L 2 , the first output storage capacitor C S1 , the second output storage capacitor C S2 , the output filter capacitor C O2 , the intermediate capacitor C n , the high-frequency transformer Tx and the lighting LED lamp load, the high-frequency transformer Tx includes the primary winding Np, the secondary main winding Ns1 and the secondary auxiliary winding Ns2; 所述单相交流输入电源uin的两个输入端分别与所述单相整流桥DB的两个交流输入端相连，所述单相整流桥DB的直流侧正输出端与所述高频变压器Tx的原边绕组Np同名端相连，所述单相整流桥DB的直流侧负输出端与所述第一功率开关管S1的源极相连；所述高频变压器Tx的原边绕组Np非同名端与所述第一功率开关管S1的漏极相连；所述高频变压器Tx的副边主绕组Ns1非同名端与所述第一功率二极管D1的阳极相连，所述高频变压器Tx的副边主绕组Ns1同名端与所述第一输出储能电容CS1的负极性端、所述输出滤波电容CO2的一端、所述第二功率开关管S2的源极以及所述可见光通信LED灯LIFI-LED的负端相连；所述第一功率二极管D1的阴极与所述第一输出储能电容CS1的正极性端以及所述照明LED灯负载的阳极相连；所述高频变压器Tx的副边辅助绕组Ns2非同名端与所述第二功率二极管D2的阳极相连，所述高频变压器Tx的副边辅助绕组Ns2同名端与所述第二输出储能电容CS2的负极性端、所述第二电感L2的一端、所述输出滤波电容CO2的另一端以及所述照明LED灯负载的阴极相连；所述第二功率二极管D2的阴极与所述第二输出电容CS2的正极性端以及第一电感L1的一端相连，所述第一电感L1的另一端与第二功率开关管S2的漏极以及所述中间电容Cn的一端相连，所述中间电容Cn的另一端与所述可见光通信LED灯LIFI-LED的正端以及第二电感L2的另一端相连；The two input terminals of the single-phase AC input power supply u in are respectively connected with the two AC input terminals of the single-phase rectifier bridge DB, and the positive output terminal of the DC side of the single-phase rectifier bridge DB is connected to the high-frequency transformer. The primary winding Np of Tx is connected to the same name terminal, and the negative output terminal of the DC side of the single-phase rectifier bridge DB is connected to the source of the first power switch S1; the primary winding Np of the high-frequency transformer Tx is not The same-named terminal is connected to the drain of the first power switch tube S1; the non-identical terminal of the secondary side main winding Ns1 of the high-frequency transformer Tx is connected to the anode of the first power diode D1, and the high-frequency transformer Tx is connected to the anode of the first power diode D1. The same name terminal of the secondary main winding Ns1 of Tx is the negative terminal of the first output energy storage capacitor C S1 , one end of the output filter capacitor C O2 , the source of the second power switch tube S 2 and the The negative terminal of the visible light communication LED lamp LIFI-LED is connected; the cathode of the first power diode D1 is connected to the positive terminal of the first output energy storage capacitor C S1 and the anode of the lighting LED lamp load; the The non-homonymous end of the secondary auxiliary winding Ns2 of the high-frequency transformer Tx is connected to the anode of the second power diode D2, and the homonymous end of the secondary auxiliary winding Ns2 of the high-frequency transformer Tx is connected to the second output energy storage capacitor C The negative end of S2 , one end of the second inductor L 2 , the other end of the output filter capacitor C O2 , and the cathode of the lighting LED lamp load are connected; the cathode of the second power diode D 2 is connected to the The positive end of the second output capacitor C S2 is connected to one end of the first inductor L 1 , and the other end of the first inductor L 1 is connected to the drain of the second power switch S 2 and one end of the intermediate capacitor C n connected, the other end of the intermediate capacitor C n is connected to the positive end of the visible light communication LED lamp LIFI-LED and the other end of the second inductor L2; 可见光通信LED灯LIFI-LED控制采用瞬时电流反馈闭环调制方法，包括以下步骤：The visible light communication LED lamp LIFI-LED control adopts the instantaneous current feedback closed-loop modulation method, including the following steps: 步骤1：由可见光通信所需光亮度参量B-L和可见光通信数据对应光亮度参量B-VLC之和，构成通信LED灯LIFI-LED的总光输出P-optic；Step 1: The total light output P-optic of the communication LED lamp LIFI-LED is formed by the sum of the light brightness parameter B-L required for visible light communication and the light brightness parameter B-VLC corresponding to the visible light communication data; 步骤2：由总光输出P-optic和LIFI-LED灯电流传函K(s)得到输出瞬时电流参考量io-ref；采样LIFI-LED灯输出瞬时电流反馈；Step 2: Obtain the output instantaneous current reference quantity io-ref from the total light output P-optic and the LIFI-LED lamp current transfer function K(s); sample the LIFI-LED lamp output instantaneous current feedback; 步骤3：由瞬时反馈电流io、电流参考量io-ref和误差放大器OP构成闭环反馈补偿网络；经PWM调制单元得到第二功率开关管S2占空比调节LIFI-LED灯可见光通信亮度和通信数据所需电流。Step 3: The closed-loop feedback compensation network is formed by the instantaneous feedback current io, the current reference quantity io-ref and the error amplifier OP; the duty cycle of the second power switch tube S2 is obtained through the PWM modulation unit to adjust the LIFI-LED lamp visible light communication brightness and communication Data required current. 2.根据权利要求1所述的一种集成可见光通信灯的单级LED驱动电路，其特征在于：所述单相交流输入电源uin、单相整流桥DB，第一功率开关管S1、高频变压器Tx、第一功率二极管D1、第一输出储能电容CS1、第二功率二极管D2以及第二输出储能电容CS2构成双绕组输出的Flyback电路；所述第二输出储能电容CS2、第二功率开关管S2、可见光通信LED灯LIFI-LED、第二电感L2、中间电容Cn以及输出滤波电容CO2构成Step-down Cuk电路。2 . The single-stage LED drive circuit integrating visible light communication lamps according to claim 1 , wherein the single-phase AC input power supply u in , the single-phase rectifier bridge DB, the first power switch tubes S 1 , The high-frequency transformer Tx, the first power diode D 1 , the first output energy storage capacitor C S1 , the second power diode D 2 and the second output energy storage capacitor C S2 form a double-winding output Flyback circuit; the second output storage capacitor C S2 The energy capacitor C S2 , the second power switch tube S 2 , the visible light communication LED lamp LIFI-LED, the second inductor L 2 , the intermediate capacitor C n and the output filter capacitor C O2 form a Step-down Cuk circuit. 3.根据权利要求1所述的一种集成可见光通信灯的单级LED驱动电路，其特征在于：所述第一功率开关管S1、第二功率开关管S2均为功率MOSFET管；两个功率MOSFET管S1和S2的工作频率不同，S2的工作频率比S1高。3 . The single-stage LED driving circuit integrating visible light communication lamps according to claim 1 , wherein the first power switch tube S 1 and the second power switch tube S 2 are both power MOSFET tubes; 3 . The operating frequencies of the power MOSFETs S1 and S2 are different, and the operating frequency of S2 is higher than that of S1. 4.根据权利要求1所述的一种集成可见光通信灯的单级LED驱动电路，其特征在于：所述第一功率二极管D1、第二功率二极管D2均为功率半导体快恢复二极管。4 . The single-stage LED driving circuit integrating a visible light communication lamp according to claim 1 , wherein the first power diode D 1 and the second power diode D2 are both power semiconductor fast recovery diodes. 5 . 5.根据权利要求1所述的一种集成可见光通信灯的单级LED驱动电路，其特征在于：所述第一输出储能电容CS1、第二输出储能电容CS2均为储能电解电容，所述输出滤波电容CO2、中间电容Cn均为高频电容。5. The single-stage LED drive circuit integrating visible light communication lamps according to claim 1, wherein the first output energy storage capacitor C S1 and the second output energy storage capacitor C S2 are both energy storage electrolysis The output filter capacitor C O2 and the intermediate capacitor C n are high-frequency capacitors. 6.根据权利要求1所述的一种集成可见光通信灯的单级LED驱动电路，其特征在于：所述高频变压器Tx为反激型高频变压器，其原边绕组Np与副边主绕组Ns1、副边辅助绕组Ns2的同名端是相反的。6 . The single-stage LED drive circuit integrating visible light communication lamps according to claim 1 , wherein the high-frequency transformer Tx is a flyback high-frequency transformer, and the primary winding Np and the secondary main winding are 6 . The same-named ends of Ns1 and secondary auxiliary winding Ns2 are opposite.
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