CN217849724U

CN217849724U - Multifunctional solar park brightening illumination control circuit

Info

Publication number: CN217849724U
Application number: CN202221692115.8U
Authority: CN
Inventors: 钱伟; 王开; 殷飚; 汤飞
Original assignee: Wuxi Yongjing Photoelectric Technology Co ltd
Current assignee: Wuxi Yongjing Photoelectric Technology Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-18
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses a multi-functional solar energy park brightening lighting control circuit, include MCU, load light source LED1, treat power supply unit, and do the MCU power supply circuit of MCU power supply, do treat the step-down output circuit of power supply unit power supply, still including connecting in MCU's control step-down output circuit's step-down control circuit still including connecting in MCU's the light source control circuit that load light source LED1 switched on. The utility model discloses charge and discharge are stable, can adjust charging current, can use the brightening illumination in the park, and illumination and other need not the commercial power around the advertising light boxes need throw light on and need the region of the equipment of external low pressure power supply.

Description

Multifunctional solar park brightening illumination control circuit

Technical Field

The utility model relates to a solar cell field specifically is a multi-functional type solar energy park brightening lighting control circuit.

Background

The battery charging and discharging of the existing power supply system is not stable enough when the power supply system needs to supply power to street lamps and display screens in public places such as parks, and particularly when the power supply system supplies power to the street lamps and the display screens together, the charging and discharging of the battery are more unstable due to different voltage requirements of the display screens and the like and the street lamps, so that the working states of the street lamps, the display screens and the like are unstable.

SUMMERY OF THE UTILITY MODEL

For solving the defects of the prior art, the utility model provides a multi-functional type solar park brightening illumination control circuit, the utility model discloses charge and discharge is stable, can adjust charging current, can use the brightening illumination in the park, and illumination and other around the advertising light boxes need not the commercial power and need the region of the equipment of external low pressure power supply.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: the utility model provides a multi-functional solar energy park brightening lighting control circuit, includes MCU, load light source LED1, treats power supply unit, and does the MCU power supply circuit of MCU power supply, for treat the step-down output circuit of power supply unit power supply, still including connecting in MCU's control step-down control circuit of step-down output circuit still including connecting in MCU the light source control circuit that load light source LED1 switches on.

Further, the MCU power supply circuit comprises a photovoltaic panel, a battery and a voltage stabilizer U1, wherein the negative electrode of the photovoltaic panel is grounded, the positive electrode of the photovoltaic panel is divided into three paths, the first path is connected to a pin 9 of the MCU through a resistor R7, the negative electrode of the resistor R7 is grounded through a resistor R8 and a battery C4 which are connected in parallel, the second path is connected to the field effect tube M5 through a diode D1, and the third path is connected to the field effect tube M4; the source electrode of the field effect transistor M5 is divided into three paths, the first path is connected to the battery through a diode D2, meanwhile, the diode D2 is grounded through a capacitor C1, the second path is connected to the diode D1, and the third path is connected to the grid electrode of the field effect transistor M5 through a resistor R4; the grid electrode of the field effect transistor M5 is grounded through a resistor R5 and a switch line which are connected in series; the drain electrode of the field effect transistor M5 is divided into three paths, the first path is grounded through a capacitor C2, the second path is grounded through a capacitor C3, and the third path is connected to a pin 2 of the voltage stabilizer U1; the pin 1 of the voltage stabilizer U1 is grounded, the pin 3 is divided into three paths, the first path is grounded through a capacitor C5, the second path is grounded through a capacitor C6, and the third path is connected to the pin 1 of the MCU; the source electrode of the field effect tube M4 is connected with the source electrode of the field effect tube M3, the grid electrode of the field effect tube M4 is divided into three paths, the first path is connected to the grid electrode of the field effect tube M3, the second path is connected to the collector electrode of the triode Q2 through the resistor R2, and the third path is connected to the source electrode of the field effect tube M3 through the resistor R1; the drain electrode of the field effect transistor M3 is divided into five paths, the first path is connected to the anode of the battery, the second path is grounded through a capacitor C1, the third path is connected to the 11 pin of the MCU through a resistor R14, the fourth path is connected to the load light source LED1, and the fifth path is connected to the voltage reduction control circuit; the emitting electrode of the triode Q2 is grounded, one path of the base electrode is grounded through the resistor R3, and the other path of the base electrode is connected to the pin 5 of the MCU through the resistor R6.

Furthermore, the step-down output circuit comprises a step-down chip U3, wherein a pin 5 of the step-down chip U3 is divided into five paths, the first path is connected to the step-down control circuit, the second path is connected to a pin 4 through a resistor R20, the third path is grounded, the fourth path is grounded through a capacitor C10, and the fifth path is grounded through a capacitor C11; pin 1 is connected with pin 6 together after passing through capacitor C12 and is divided into two paths, the first path is grounded through diode D4, and the second path is connected with inductor L1; the inductor L1 is divided into six paths, wherein the first path is grounded through a resistor R21 and a resistor R22, the second path is grounded through a capacitor C13 and the resistor R22, the third path is grounded through a capacitor C14, the fourth path is grounded through a capacitor C15, the fifth path is grounded through a capacitor C16, and the sixth path is connected to the equipment to be powered.

Further, the buck control circuit comprises a field effect transistor M1 and a triode Q1, wherein a source electrode of the field effect transistor M1 is connected to the MCU power supply circuit, a gate electrode is connected to the source electrode through a resistor R18, the gate electrode is connected to a collector electrode of the triode Q1 through a resistor R19, and a drain electrode is connected to pin 5 of the buck chip U3 of the buck output circuit; the emitting electrode of the triode Q1 is grounded, the base electrode is grounded through a resistor R12, and the base electrode is connected to a pin 13 of the MCU through a resistor R17.

Further, the light source control circuit comprises a field effect transistor M2, a drain electrode of the field effect transistor M2 is connected to the load light source LED1, a gate electrode is connected to pin 6 of the MCU through a resistor R11, and is grounded through a resistor R16; the source electrode of the field effect transistor M2 is divided into three paths, the first path is connected with the resistor R13, the second path is grounded through the resistor R23, and the third path is grounded through the resistor R24; one path of the resistor R13 is grounded through the capacitor C8, and the other path of the resistor R is connected to a pin 10 of the MCU.

Furthermore,

pins

1, 14 and 8 of the MCU are connected with an infrared receiving head IR1, pins 2 are connected to the infrared receiving head IR1 through a chip resistor RC1, pins 3 are grounded through a resistor R9 and a diode RL1, and pins 7 are grounded through a resistor R10 and a diode GL 1; the pin 8 is grounded through a capacitor C9, the pin 11 is divided into three paths, the first path is grounded through a capacitor C7, the second path is grounded through a resistor R15, and the third path is connected to the MCU power supply circuit through a resistor R24.

To sum up, the utility model discloses following technological effect has been gained:

1. the utility model discloses realizable function has:

1. the photovoltaic panel is used for adjusting a charging switch of the lithium battery and charging current;

2. charge and discharge management of the lithium battery, namely overcharge and over-discharge protection of the battery;

3. overcurrent protection and short-circuit protection of the load part;

4. automatically turning on or off load output according to the intensity of ambient light;

5. the display screen supplies power at constant voltage and automatically adjusts the working time of the display screen;

6. the working time periods of the load light source and the display screen can be independently controlled by a remote controller;

7. a low power consumption standby mode to conserve battery power;

the application scenes are as follows: lighting in parks, lighting around advertising light boxes and other areas that do not require mains electricity for illumination and require external low voltage powered equipment.

Drawings

Fig. 1 is a schematic diagram of a lighting control circuit principle of a multifunctional solar park lighting device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

a multifunctional solar park brightening illumination control circuit is structurally a lithium battery multifunctional brightening illumination control circuit based on the combination of software and hardware controlled by an MCU (microprogrammed control Unit) of which the model is FT61F022A, detects the drive current of a load part through a voltage sampling pin of the MCU, realizes overcurrent protection and short-circuit protection of the load, and burns specific software to meet the requirements of customers or design. Including MCU, load light source LED1, treat the power supply unit to and for the MCU power supply circuit 1 of MCU power supply, for the step-down output circuit 3 of treating the power supply unit power supply, still including the step-down control circuit 2 of the control step-down output circuit 3 who connects in MCU, still including the light source control circuit 4 who is used for controlling load light source LED1 and switches on connected in MCU. The device to be powered, for example a display screen.

U2 is MCU, and the model is FT61F022A, through burning the software that accords with hardware circuit and customer requirement, can control whole circuit.

The MCU power supply circuit 1 comprises a photovoltaic panel, a battery and a voltage stabilizer U1, wherein the U1 is a low-dropout linear voltage stabilizer and provides stable power supply voltage for the MCU. The negative electrode of the photovoltaic panel is grounded, the positive electrode of the photovoltaic panel is divided into three paths, the first path is connected to a pin 9 of the MCU through a resistor R7, the negative electrode of the resistor R7 is grounded through a resistor R8 and a battery C4 which are connected in parallel, R7 and R8 are voltage division sampling resistors of the photovoltaic panel voltage, C4 plays a role in sampling and filtering, the second path is connected to a field effect tube M5 through a diode D1, and the third path is connected to the field effect tube M4; the source electrode of the field effect transistor M5 is divided into three paths, the first path is connected to a battery through a diode D2, meanwhile, the diode D2 is grounded through a capacitor C1, the C1 is a filter capacitor for supplying power to the battery, the second path is connected to the diode D1, and the third path is connected to the grid electrode of the field effect transistor M5 through a resistor R4; the grid electrode of the field effect transistor M5 is grounded through the resistor R5 and the switch line which are connected in series; the drain electrode of the field effect transistor M5 is divided into three paths, the first path is grounded through a capacitor C2, the second path is grounded through a capacitor C3, C2 and C3 are filter capacitors of the input voltage of the U1, and the third path is connected to a pin 2 of the voltage stabilizer U1; the pin 1 of the voltage stabilizer U1 is grounded, the pin 3 is divided into three paths, the first path is grounded through a capacitor C5, the second path is grounded through a capacitor C6, C5 and C6 are filter capacitors for outputting voltage of the U1, and the third path is connected to the pin 1 of the MCU; the source electrode of the field effect tube M4 is connected with the source electrode of the field effect tube M3, the grid electrode of the field effect tube M4 is divided into three paths, the first path is connected to the grid electrode of the field effect tube M3, the second path is connected to the collector electrode of the triode Q2 through the resistor R2, and the third path is connected to the source electrode of the field effect tube M3 through the resistor R1; the drain electrode of the field effect transistor M3 is divided into five paths, the first path is connected to the anode of the battery, the second path is grounded through a capacitor C1, the third path is connected to a pin 11 of the MCU through a resistor R14, the fourth path is connected to a load light source LED1, and the fifth path is connected to a voltage reduction control circuit 2; the emitting electrode of the triode Q2 is grounded, one path of the base electrode is grounded through the resistor R3, the other path of the base electrode is connected to the pin 5 of the MCU through the resistor R6, and the R6 is a driving resistor of the base electrode of the Q2 by the MCU. Q2 is an NPN triode, Q2 can control the conduction states of M3 and M4 and adjust the corresponding duty ratio, and R3 is a pull-down resistor of Q2, so that Q2 can be always closed while signals are not determined.

M3, M4 are P channel field effect transistor, play the effect of control opening closing charging in the process that photovoltaic board charges the battery, also adjust charging current and prevent the effect of back discharge. R1 is M3, and the pull-up resistance of M4 can be at high level through a resistance clamper by an uncertain signal with M3, the grid of M4, guarantees that when no other signal is input, M3 and M4 are in the closed conducting state, prevents that the photovoltaic board from charging the battery by mistake. R2 is a voltage dividing resistor of the grid electrode, and the GS voltage of M3 and M4 is prevented from being too high.

M5 is a low-power P-channel field effect transistor, can control a power supply switch of the whole system, and ensures low power consumption in a standby mode when the switch is disconnected. R4 is a pull-up resistor of M5, so that the stable off state of M5 is ensured, namely, the power supply of the whole system is ensured to be in the off state, and R5 is a driving resistor of the grid electrode of M5, so that the GS voltage of M5 is prevented from being too high.

D1 And D2 is a Schottky diode, the photovoltaic panel and the battery can simultaneously supply power for the MCU of the core, and the battery is prevented from being incapable of supplying power to the MCU when being over-discharged, so that the photovoltaic panel can not charge the battery, and the direct charging of the battery by the photovoltaic panel and the discharging of the battery to the photovoltaic panel are also avoided.

The step-down output circuit 3 comprises a step-down chip U3, the DC-DC step-down output circuit is U3, the model is MD8941, when the input voltage is high, the output voltage can be constant, and the damage of the power supply equipment to be powered due to the high input voltage is avoided. The pin 5 of the voltage reduction chip U3 is divided into five paths, the first path is connected to the voltage reduction control circuit 2, the second path is connected to the pin 4 through a resistor R20, the third path is grounded, the fourth path is grounded through a capacitor C10, and the fifth path is grounded through a capacitor C11; pin 1 is connected with pin 6 together after passing through capacitor C12 and is divided into two paths, the first path is grounded through diode D4, and the second path is connected with inductor L1; the inductor L1 is divided into six paths, the first path is grounded through a resistor R21 and a resistor R22, the second path is grounded through a capacitor C13 and a resistor R22, the third path is grounded through a capacitor C14, the fourth path is grounded through a capacitor C15, the fifth path is grounded through a capacitor C16, and the sixth path is connected to the equipment to be powered.

The buck control circuit 2 comprises a field effect transistor M1 and a triode Q1, the source electrode of the field effect transistor M1 is connected to the MCU power supply circuit 1, the grid electrode is connected to the source electrode through a resistor R18, the grid electrode is connected to the collector electrode of the triode Q1 through a resistor R19, and the drain electrode is connected to a pin 5 of a buck chip U3 of the buck output circuit 3; the emitter of the triode Q1 is grounded, the base is grounded through a resistor R12, and the base is connected to the pin 13 of the MCU through a resistor R17.

M1 is a low-current P-channel field effect transistor, and can control the power supply of a DC-DC voltage reduction IC (MD 8941), thereby controlling the conduction state of the equipment to be powered and controlling the switch of M1 by adjusting the high-low level of the base electrode of Q1.

R18 is a pull-up resistor of M1, so that the stable closing state of M1 is ensured, namely, the equipment to be powered is ensured to be in the stable closing state, and the GS voltage of M1 is prevented from being too high due to the voltage dividing resistor of the M1 grid of R19.

The light source control circuit 4 comprises a field effect transistor M2, the drain electrode of the field effect transistor M2 is connected to the load light source LED1, the grid electrode of the field effect transistor M2 is connected to a pin 6 of the MCU through a resistor R11, and the grid electrode of the field effect transistor M2 is grounded through a resistor R16; the source electrode of the field effect tube M2 is divided into three paths, the first path is connected with the resistor R13, the second path is grounded through the resistor R23, and the third path is grounded through the resistor R24; one path of the resistor R13 is grounded through the capacitor C8, and the other path is connected to a pin 10 of the MCU. R13 is a protection resistor for sampling the LED discharge current by the MCU, and C8 has the effect of sampling and filtering. R23 and R24 are discharge current sampling resistors of the load part, and the upper limit operating current can be changed by adjusting the resistance values of R23 and R24.

M2 is a high-current N-channel field effect transistor, can control the conduction state of a load light source, and controls the on-off of a load by adjusting the high and low levels of the grid of the M2. R11 is a grid driving resistor of M2, and R16 is a grid pull-down resistor of M2, so that a stable off state of M2, namely stable off of the load light source is ensured.

Pins

1, 14 and 8 of the MCU are connected with an infrared receiving head IR1, pin 2 is connected to the infrared receiving head IR1 through a chip resistor RC1, pin 3 is grounded through a resistor R9 and a diode RL1, and pin 7 is grounded through a resistor R10 and a diode GL 1; the pin 8 is grounded through a capacitor C9, the pin 11 is divided into three paths, the first path is grounded through a capacitor C7, the second path is grounded through a resistor R15, and the third path is connected to the MCU power supply circuit 1 through a resistor R24. R14 and R15 are voltage division sampling resistors of the battery voltage, and C7 plays a role in sampling and filtering. And R9 is a current limiting resistor of a red indicator lamp. R10 is the current limiting resistor of the green indicator light.

The IR1 is an infrared receiving head, can receive a transmitting signal of an infrared remote controller, and can control the LED load light source and the switch of the equipment to be powered and adjust the corresponding working mode by decoding through the MCU. RL1 is a red indicator light and can indicate whether the power-down phenomenon exists. GL1 is a green light indicating whether the battery is in a charged state and whether the battery is fully charged. When both flash at the same time, the load can be indicated as an abnormal state.

RC1 is a work switching resistor of a system power supply voltage, during mounting, a default high level of a pin 2 of the MCU is changed into a low level, and the MCU judges three strings of ternary lithium batteries with the battery voltage of 11.1V; when the lithium iron phosphate battery is not mounted, the 2 pins of the MCU default to high level, and the MCU judges four lithium iron phosphate batteries with the battery voltage of 12.8V.

After a whole set of system of equipment, when slowly getting into night from daytime, the light that photovoltaic board surface received reduces, the voltage of photovoltaic board reduces gradually promptly, when MCU's 9 feet detected photovoltaic board voltage and is less than a definite value gradually, MCU judges this moment and is about to get into the night state, need open the load light source and treat power supply unit work, the system gets into the operating condition that discharges, MCU's 6 feet become the high level by the low level, M2 switches on, the light source work. And the pin 13 of the MCU is changed from low level to high level, Q1 is conducted, M1 is conducted, U3 starts to supply power, and the equipment to be powered starts to work. When the battery electric quantity is enough, the load light source can work according to the set working duration all the time, when the time is not as late as night, the number of pedestrians is reduced, the power supply equipment can work for a certain time and then is automatically closed, the electric quantity is saved, and namely 13 feet of the MCU become low level. When the photovoltaic power supply device slowly enters the daytime at night, light on the surface of the photovoltaic panel begins to increase, the voltage of the photovoltaic panel rises, when the voltage of the photovoltaic panel is detected to be gradually higher than a certain value by the pins 9 of the MCU, the MCU judges that the photovoltaic power supply device is about to enter the daytime at the moment, the pins 6 of the MCU output low levels, the load light source is closed, the pins 13 of the MCU become high levels, the power supply device is started, and after the power supply device works for a period of time, the power supply device is continuously in the closed state due to less people in the middle of the park until the power supply device is started in the evening; if the voltage of the battery is lower than the over-discharge value, the load light source and the equipment to be powered are both in the closed state, and the over-discharge state is removed until the photovoltaic panel charges the battery with certain electric quantity, so that the work of the load light source and the equipment to be powered is recovered.

When the voltage of the photovoltaic panel is detected to be higher than the voltage of the battery, the MCU opens a channel for charging the battery by the photovoltaic panel, M3 and M4 are gradually started from a closed state, the green indicator light starts to flash to prompt the photovoltaic panel to charge the battery at the moment, and in order to prevent the charging current from being too large at the moment of starting the charging channel, 5 pins of the MCU gradually increase PWM output until the voltage is increased to a high level, and the PWM output lasts for a period of time; when the MCU detects that the voltage of the battery reaches a certain value, the charging current of the photovoltaic panel to the battery is gradually reduced, namely 5 pins of the MCU gradually reduce PWM output, so that the electric quantity of the battery can be charged more saturated, the damage to the battery caused by large-current overcharge can be prevented, and the service life of the battery is prolonged; when MCU detects that battery voltage is higher than a definite value, judge that the battery enters the overcharge state, then close the charging channel, 5 foot output of MCU become the low level promptly, Q2 closes, M3, M4 are in the off-state, and green pilot lamp becomes the normal bright state, and the suggestion battery power has been full, and until the battery is from power consumptive, the voltage drops to resume again after being less than a definite value and charges, and green pilot lamp resumes the scintillation to this circulation. When the ambient light is reduced until entering the night, the MCU detects that the voltage of the photovoltaic panel is gradually reduced, and after the voltage is lower than a certain value, the battery enters the discharge state, and the cycle is repeated.

The utility model discloses a three cluster ternary lithium or four cluster lithium iron phosphate's 12V lithium cell, 18V photovoltaic board, load light source and external display screen or other equipment that need the 12V power supply, for example display screen etc. can be used for the intelligent illumination that need not the commercial power and insert. The solution is used for road lighting in parks and for the supply of adjustable time periods responsible for advertising screens. The intelligent charging and discharging system can ensure the stable charging and discharging of the battery and the continuous and stable work of the load and the display screen. The main accessories comprise a control drive board, a load light source, a display screen, 11.1V or 12.8V lithium batteries, 18V photovoltaic panels, a lamp housing and a lamp post and the like.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a multi-functional solar energy park brightening illumination control circuit which characterized in that: including MCU, load light source LED1, treat the power supply unit, and do MCU power supply circuit (1) of MCU power supply, do treat step-down output circuit (3) of power supply unit power supply, still including connecting in MCU's control step-down control circuit (2) of step-down output circuit (3), still including connecting being used for in MCU control the light source control circuit (4) that load light source LED1 switched on.

2. The multifunctional solar park brightening illumination control circuit of claim 1, characterized in that: the MCU power supply circuit (1) comprises a photovoltaic panel, a battery and a voltage stabilizer U1, wherein the negative electrode of the photovoltaic panel is grounded, the positive electrode of the photovoltaic panel is divided into three paths, the first path is connected to a pin 9 of the MCU through a resistor R7, the negative electrode of the resistor R7 is grounded through a resistor R8 and a battery C4 which are connected in parallel, the second path is connected to a field effect tube M5 through a diode D1, and the third path is connected to the field effect tube M4; the source electrode of the field effect transistor M5 is divided into three paths, the first path is connected to the battery through a diode D2, meanwhile, the diode D2 is grounded through a capacitor C1, the second path is connected to the diode D1, and the third path is connected to the grid electrode of the field effect transistor M5 through a resistor R4; the grid electrode of the field effect transistor M5 is grounded through a resistor R5 and a switch line which are connected in series; the drain electrode of the field effect transistor M5 is divided into three paths, the first path is grounded through a capacitor C2, the second path is grounded through a capacitor C3, and the third path is connected to a pin 2 of the voltage stabilizer U1; the pin 1 of the voltage stabilizer U1 is grounded, the pin 3 is divided into three paths, the first path is grounded through a capacitor C5, the second path is grounded through a capacitor C6, and the third path is connected to the pin 1 of the MCU; the source electrode of the field-effect tube M4 is connected with the source electrode of the field-effect tube M3, the grid electrode of the field-effect tube M4 is divided into three paths, the first path is connected to the grid electrode of the field-effect tube M3, the second path is connected to the collector electrode of the triode Q2 through the resistor R2, and the third path is connected to the source electrode of the field-effect tube M3 through the resistor R1; the drain electrode of the field effect transistor M3 is divided into five paths, the first path is connected to the anode of the battery, the second path is grounded through a capacitor C1, the third path is connected to a pin 11 of the MCU through a resistor R14, the fourth path is connected to the load light source LED1, and the fifth path is connected to the voltage reduction control circuit (2); the emitting electrode of the triode Q2 is grounded, one path of the base electrode is grounded through the resistor R3, and the other path of the base electrode is connected to the pin 5 of the MCU through the resistor R6.

3. The multifunctional solar park brightening lighting control circuit of claim 2, wherein: the step-down output circuit (3) comprises a step-down chip U3, wherein a pin 5 of the step-down chip U3 is divided into five paths, the first path is connected to the step-down control circuit (2), the second path is connected to a pin 4 through a resistor R20, the third path is grounded, the fourth path is grounded through a capacitor C10, and the fifth path is grounded through a capacitor C11; pin 1 is connected with pin 6 together after passing through capacitor C12 and is divided into two paths, the first path is grounded through diode D4, and the second path is connected with inductor L1; the inductor L1 is divided into six paths, wherein the first path is grounded through a resistor R21 and a resistor R22, the second path is grounded through a capacitor C13 and the resistor R22, the third path is grounded through a capacitor C14, the fourth path is grounded through a capacitor C15, the fifth path is grounded through a capacitor C16, and the sixth path is connected to the equipment to be powered.

4. The multifunctional solar park brightening lighting control circuit of claim 3, wherein: the buck control circuit (2) comprises a field effect transistor M1 and a triode Q1, wherein the source electrode of the field effect transistor M1 is connected to the MCU power supply circuit (1), the grid electrode of the field effect transistor M1 is connected to the source electrode through a resistor R18, the grid electrode of the field effect transistor M1 is connected to the collector electrode of the triode Q1 through a resistor R19, and the drain electrode of the field effect transistor M1 is connected to a pin 5 of the buck chip U3 of the buck output circuit (3); the emitting electrode of the triode Q1 is grounded, the base electrode is grounded through a resistor R12, and the base electrode is connected to a pin 13 of the MCU through a resistor R17.

5. The multifunctional solar park brightening illumination control circuit of claim 4, characterized in that: the light source control circuit (4) comprises a field effect transistor M2, the drain electrode of the field effect transistor M2 is connected to the load light source LED1, the grid electrode of the field effect transistor M2 is connected to a pin 6 of the MCU through a resistor R11, and the grid electrode of the field effect transistor M is grounded through a resistor R16; the source electrode of the field effect transistor M2 is divided into three paths, the first path is connected with the resistor R13, the second path is grounded through the resistor R23, and the third path is grounded through the resistor R24; one path of the resistor R13 is grounded through the capacitor C8, and the other path of the resistor R is connected to a pin 10 of the MCU.

6. The multifunctional solar park brightening lighting control circuit of claim 5, wherein: pins 1, 14 and 8 of the MCU are connected with an infrared receiving head IR1, pins 2 are connected to the infrared receiving head IR1 through a chip resistor RC1, pins 3 are grounded through a resistor R9 and a diode RL1, and pins 7 are grounded through a resistor R10 and a diode GL 1; the pin 8 is grounded through a capacitor C9, the pin 11 is divided into three paths, the first path is grounded through a capacitor C7, the second path is grounded through a resistor R15, and the third path is connected to the MCU power supply circuit (1) through a resistor R24.