A solar intelligent control TLCC drive circuit

Abstract

The present invention discloses a solar intelligent control type TLCC driving circuit, comprising a photovoltaic module, an over-temperature protection module and an LED load, wherein the photovoltaic module supplies power to the LED load through the over-temperature protection module, wherein the photovoltaic module comprises a photovoltaic solar panel S1, a diode D1, a diode D2, an energy storage battery BT, a voltage dividing resistor R2, a voltage dividing resistor R3, a switch K1 and a transistor Q3, wherein the base of the transistor Q3 is connected to the V-interface of the photovoltaic solar panel S1 through the voltage dividing resistor R3 and is connected to the V+ interface of the photovoltaic solar panel S1 through the voltage dividing resistor R2 and the diode D1, wherein the emitter of the transistor Q3 is connected to the V-interface of the photovoltaic solar panel S1, wherein the diode D2 and the energy storage battery BT are connected in series between the V+ interface and the V-interface of the photovoltaic solar panel S1, wherein one end of the switch K1 is arranged between the diode D2 and the energy storage battery BT and the other end is respectively connected to the positive terminal of the LED load and the over-temperature protection module, wherein the switch K1 is charged during the day and automatically illuminated at night.

Description

[Technical field]

[0002] The present invention relates to the technical field of drive circuits, and in particular to the technical field of a solar intelligent control type TLCC (Triode linear constant current) drive circuit. [Background technology]

[0004] LED lamps are recognized as the fourth generation of green light sources. They have many advantages such as high efficiency, long life, safety and environmental protection, small size, high reliability and fast response speed. The technology is mature and widely used in various fields. Since LED is a constant current workload, constant current drive is used to ensure that it always maintains a safe and stable working condition. The existing driving circuit of LED lamps usually relies on a dedicated constant current drive chip for constant current drive. Therefore, the production capacity of the product is greatly affected by the market supply of the chip, and the price of the product is also prone to change with the price increase of the chip, making it difficult to ensure stable production. The driving circuit that uses some discrete components to achieve constant current drive has problems such as complex circuit structure and high cost. In actual production, it cannot achieve the cost-effectiveness and reliability of the driving circuit using a dedicated chip.

[0005] The forward voltage VF of the LED lamp has a negative temperature characteristic, which is manifested as the VF value decreases with the increase of temperature. When the LED lamp is driven at a constant voltage, the temperature of the LED lamp increases due to the ambient temperature and self-heating, and the VF value decreases, which will cause the conduction current of the LED lamp to increase, which in turn causes the temperature of the LED to rise further and the VF value to decrease further. In terms of power, this process is a positive feedback process, which will eventually lead to thermal runaway of the LED lamp, affecting the reliability and service life of the LED lamp. In order to avoid the above problems, the over-temperature protection of the LED drive circuit has to be given priority consideration.

[0006] In addition, with the continuous innovation of LED driving technology, user needs are also changing, from the initial requirements of high brightness and low efficacy to requirements for dimming characteristics and light quality. However, LED lamps are different from traditional incandescent lamps and are not pure resistive loads. If a dimmer is directly configured for dimming, it will cause serious flickering and other problems, which need to be solved urgently.

[0007] Solar energy is a natural renewable energy source that is inexhaustible. Scientific and technological research on solar energy conversion and other applications will undoubtedly bring significant improvements to real life. At present, in the field of solar lamps, in order to achieve automatic switching of lamps during the day and night, people usually set some photosensitive sensors on the microcontroller of the lamps, so as to use the photosensitive sensors to sense the changes in ambient light, and then control the switch of the lamps through the microcontroller. The entire photosensitive process is complicated and consumes electricity, which needs to be improved urgently. [Summary of the invention]

[0009] The purpose of the present invention is to solve the problems in the prior art and to propose a solar intelligent control TLCC drive circuit that can output a constant current, has the characteristics of automatic over-temperature protection, can be dimmed as needed, and automatically charges during the day and automatically illuminates at night.

[0010] To achieve the above object, the present invention proposes a solar intelligent control type TLCC driving circuit, including a photovoltaic module, an over-temperature protection module and an LED load, wherein the photovoltaic module supplies power to the LED load through the over-temperature protection module, and the photovoltaic module includes a photovoltaic solar panel S1, a diode D1, a diode D2, an energy storage battery BT, a voltage divider resistor R2, a voltage divider resistor R3, a switch K1 and a transistor Q3, wherein the base of the transistor Q3 is connected to the V- interface of the photovoltaic solar panel S1 through the voltage divider resistor R3 and is connected to the V+ interface of the photovoltaic solar panel S1 through the voltage divider resistor R2 and the diode D1, the emitter of the transistor Q3 is connected to the V- interface of the photovoltaic solar panel S1, the diode D2 and the energy storage battery BT are connected in series between the V+ interface and the V- interface of the photovoltaic solar panel S1, one end of the switch K1 is arranged between the diode D2 and the energy storage battery BT and the other end is respectively connected to the positive terminal of the LED load and the over-temperature protection module;

[0011] When the photovoltaic solar panel S1 receives sunlight radiation, the energy storage battery BT is charged, and Q3 turns off the over-temperature protection module, thereby disconnecting the LED load from the photovoltaic module;

[0012] When the photovoltaic solar panel S1 is not exposed to sunlight, the energy storage battery BT is discharged, and Q3 turns on the over-temperature protection module, thereby conducting between the LED load and the photovoltaic module.

[0013] Preferably, the over-temperature protection module includes a transistor Q1, a transistor Q2, a starting resistor R1 and a constant current resistor Rs, the collector of the transistor Q1, the base of the transistor Q2 and the collector of the transistor Q3 are connected and connected to the positive terminal of the LED load and one end of the switch K1 through the starting resistor R1, the base of the transistor Q1 is connected to the emitter of the transistor Q2 and connected to the V-interface of the photovoltaic solar panel S1 through the constant current resistor Rs, the emitter of the transistor Q1 is connected to the V-interface of the photovoltaic solar panel S1, and the negative terminal of the LED load is connected to the collector of the transistor Q2.

[0014] Preferably, the energy storage battery BT is a lithium battery pack with a charge and discharge protection plate.

[0015] Preferably, the switch K1 is a manual switch.

[0016] Preferably, a shunt resistor RA is connected between the collector of the transistor Q2 and the emitter of the transistor Q2.

[0017] Preferably, the TLCC driving circuit exhibits a constant current output characteristic during normal operation and the calculation formula is as follows:

[0018] ;

[0019] Among them, Iout_CC is the constant output current, Q1Vbe is the voltage between the base and the emitter of the transistor Q1, and Rs is the resistance of the constant current resistor Rs.

[0020] Preferably, a dimming module is further included, the dimming module comprising a diode D3, a current limiting resistor R4 and a pulse width modulator PWM, the communication interface of the pulse width modulator PWM is connected to one end of the voltage dividing resistor R2, one end of the voltage dividing resistor R3 and the base of the transistor Q3 through the diode D3 and the current limiting resistor R4;

[0021] The pulse width modulator PWM switches the PWM signal to a suspended or low level state, and uses the transistor Q3 to turn on the over-temperature protection module, thereby making the LED load and the photovoltaic module conductive;

[0022] The pulse width modulator PWM switches the PWM signal to a high level state and uses the transistor Q3 to turn off the over-temperature protection module, thereby disconnecting the phase between the LED load and the photovoltaic module.

[0023] Beneficial effects of the present invention: the present invention forms a complete ecosystem through the cooperation of the photovoltaic module, the over-temperature protection module and the LED load, and realizes the functions of automatic charging during the day and automatic lighting at night; by setting the switch K1 after the charging circuit of the energy storage battery BT, the opening and closing state of the switch K1 is prevented from affecting the charging of the battery, ensuring that the energy storage battery BT can be charged uninterruptedly, and preventing the occurrence of system failures caused by the contact resistance and mechanical damage of the switch K1; by setting the switch K1 to the manual switch mode, it is easy to install, and it is always kept in a disconnected state before the product is produced, packaged and installed, and kept in a closed state after installation, so as to start the entire drive circuit; by setting the transistor Q1, the transistor Q2, the starting resistor R1 and the constant current resistor Rs to form an over-temperature protection module, the current flowing through the constant current resistor Rs is equal to the loop current of the LED load, and the voltage of the constant current resistor Rs is equal to the voltage between the base and the emitter of the transistor Q1, so as to utilize the Q1Vbe connection The characteristic of a fixed value is that the resistance parameter of the constant current resistor Rs can be freely adjusted according to the need to realize the automatic adjustment of the constant output current. There is no need to use a dedicated constant current chip, which is less affected by the price and supply of the chip. It can also alleviate the problem of the lack of integrated circuit chips to a certain extent. The overall circuit has obvious advantages, outstanding performance, low cost and high cost performance. It can utilize the inherent temperature drift characteristics of the transistor, so that when the circuit itself or the external temperature is higher than the threshold temperature of the transistor, the constant output current is reduced, and when the driving circuit is released from the abnormal temperature rise state, the normal constant output current is restored. The whole process is repeated, thereby realizing the characteristic of automatic over-temperature protection; by setting a shunt resistor RA between the collector of the transistor Q2 and the emitter of the transistor Q2, the power consumption transfer of the transistor Q2 can be better realized, and the reliability and safety of the circuit can be further improved; through the access of the high and low levels of the pulse width modulator PWM, the opening angle of the transistor Q3 can be adjusted to realize digital intelligent dimming control.

[0024] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0026] Figure 1 is a structural schematic diagram of embodiment 1;

[0027] Figure 2 is a structural diagram of Embodiment 2;

[0028] Figure 3 is a schematic structural diagram of Embodiment 3;

[0029] Figure 4 It is a structural diagram of embodiment 4. [Specific implementation method]

[0031] Embodiment 1:

[0032] See also Figure 1 The present invention provides a solar intelligent control type TLCC driving circuit, comprising a photovoltaic module, an over-temperature protection module and an LED load, wherein the photovoltaic module supplies power to the LED load through the over-temperature protection module, wherein the photovoltaic module comprises a photovoltaic solar panel S1, a diode D1, a diode D2, an energy storage battery BT, a voltage dividing resistor R2, a voltage dividing resistor R3, a switch K1 and a transistor Q3, wherein the base of the transistor Q3 is connected to the V- interface of the photovoltaic solar panel S1 through the voltage dividing resistor R3 and is connected to the V+ interface of the photovoltaic solar panel S1 through the voltage dividing resistor R2 and the diode D1, wherein the emitter of the transistor Q3 is connected to the V- interface of the photovoltaic solar panel S1, wherein the diode D2 and the energy storage battery BT are connected in series between the V+ interface and the V- interface of the photovoltaic solar panel S1, wherein one end of the switch K1 is arranged between the diode D2 and the energy storage battery BT and the other end is respectively connected to the positive terminal of the LED load and the over-temperature protection module;

[0033] When the photovoltaic solar panel S1 receives sunlight radiation, the energy storage battery BT is charged, and Q3 turns off the over-temperature protection module, thereby disconnecting the LED load from the photovoltaic module;

[0034] When the photovoltaic solar panel S1 is not exposed to sunlight, the energy storage battery BT is discharged, and Q3 turns on the over-temperature protection module, thereby conducting between the LED load and the photovoltaic module.

[0035] The over-temperature protection module includes a transistor Q1, a transistor Q2, a starting resistor R1 and a constant current resistor Rs. The collector of the transistor Q1, the base of the transistor Q2 and the collector of the transistor Q3 are connected and connected to the positive terminal of the LED load and one end of the switch K1 through the starting resistor R1. The base of the transistor Q1 is connected to the emitter of the transistor Q2 and connected to the V-interface of the photovoltaic solar panel S1 through the constant current resistor Rs. The emitter of the transistor Q1 is connected to the V-interface of the photovoltaic solar panel S1, and the negative terminal of the LED load is connected to the collector of the transistor Q2.

[0036] The energy storage battery BT is a lithium battery pack with a charge and discharge protection plate.

[0037] The switch K1 is a manual switch.

[0038] The TLCC driving circuit exhibits a constant current output characteristic during normal operation and the calculation formula is as follows:

[0039] ;

[0040] Among them, Iout_CC is the constant output current, Q1Vbe is the voltage between the base and the emitter of the transistor Q1, and Rs is the resistance of the constant current resistor Rs.

[0041] Working process of the present invention:

[0042] During the day and when the switch K1 is closed, the photovoltaic solar panel S1 receives sunlight radiation, and the output interface generates a DC voltage. Subsequently, the DC voltage is divided into two paths, one of which is grounded through the diode D1, the voltage-dividing resistor R2 and the voltage-dividing resistor R3, and the other is divided into two paths through the diode D2, and is respectively connected to the positive terminals of the energy storage battery BT and the LED load. At this time, since the voltage-dividing resistor R2 is connected to the base of the transistor Q3, the base of the transistor Q3 is in a high level state, and the Vbe of the transistor Q3 is turned on, so that the collector of the transistor Q3 is grounded to the emitter of the transistor Q3, so that the base of the transistor Q2 is regarded as grounded through the collector of the transistor Q3, forcing the transistor Q2 to turn off, so that the LED load cannot form a normal working circuit, and finally the whole system is in standby mode. Therefore, during the day, the photovoltaic solar panel S1 can only charge the energy storage battery BT, and the LED load is in an automatic light-off state. In addition, since the energy storage battery BT is a lithium battery pack with a charge and discharge protection board, it can effectively ensure the safety and reliability of charging.

[0043] At night, when the switch K1 is closed, the photovoltaic solar panel S1 does not receive sunlight radiation, and the output interface cannot generate a DC voltage. At this time, the diode D1 is divided into a low-level signal through the voltage-dividing resistors R2 and R3, the transistor Q3 does not start, and the collector of the transistor Q3 is considered to be in a suspended and invalid state, so that the transistor Q2 starts normally under the action of the resistor R1. At the same time, the energy storage battery BT supplies power to the LED load through the switch K1 on the one hand, and provides a collector bias resistor for the transistor Q1 through the starting resistor R1 on the other hand, and provides a base starting voltage for the transistor Q2. Therefore, at night, the energy storage battery BT discharges, and the LED load is in an automatic light-on state. In addition, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to the emitter of the transistor Q2 and is grounded through the constant current resistor Rs, and the collector of the transistor Q2 is connected to the negative terminal of the LED load, so that the switching state of the transistor Q2 can be controlled by the transistor Q1.

[0044] For the LED load, the current flows from the V+ interface of the photovoltaic solar panel S1 through the diode D2 and the switch K1 through the positive and negative terminals of the LED load, and then flows through the collector of the transistor Q2 to the emitter of the transistor Q2, and finally connects to the ground through the constant current resistor Rs to form a complete electrical circuit. At this time, the loop current of the LED load is equal to the current flowing through the constant current resistor Rs. Because the two ends of the constant current resistor Rs are connected to the base of the transistor Q1 and the emitter of the transistor Q1 respectively, the voltage of the constant current resistor Rs is equal to the voltage between the base of the transistor Q1 and the emitter of the transistor Q1, that is, Q1Vbe. As we all know, Vbe is the characteristic voltage of the transistor and is close to a fixed value, such as 0.6~0.7V for silicon tubes and 0.2~0.3V for germanium tubes. Therefore, by adjusting the resistance parameters of the constant current resistor Rs, the constant output current of the TLCC drive circuit can be adjusted. Taking Q1Vbe as 0.6V, the calculation formula of constant output current Iout_CC is as follows:

[0045] ;

[0046] Among them, Iout_CC is the constant output current, Q1Vbe is the voltage between the base and the emitter of the transistor Q1, and Rs is the resistance of the constant current resistor Rs.

[0047] During operation, the TLCC drive circuit presents a constant current output characteristic, and the transistor Q1 constantly detects the temperature rise to achieve the function of automatic over-temperature protection. The principle of automatic over-temperature protection is as follows:

[0048] The transistor has an inherent temperature drift characteristic, that is, when the circuit itself or the external temperature is higher than the threshold temperature of the transistor, the Vbe of the transistor gradually decreases as the temperature rises. In other words, when the transistor Q1 detects that the temperature is too high, Q1Vbe will decrease accordingly, so that the current of the constant current resistor Rs is pulled down, thereby reducing Iout_CC; when the TLCC drive circuit is relieved of the abnormal temperature rise state, Q1Vbe returns to normal, so that the voltage detected at both ends of the constant current resistor Rs returns to normal, thereby achieving the set constant current state, and the whole process repeats itself.

[0049] Embodiment 2:

[0050] See also Figure 2 A shunt resistor RA is connected between the collector of the transistor Q2 and the emitter of the transistor Q2.

[0051] The rest is the same as in the first embodiment.

[0052] The shunt resistor RA added in parallel between the collector and emitter of transistor Q2 in the TLCC drive circuit has a unique shunt and power consumption function, which can divide the circuit from the positive end of the LED load to the negative end of the LED load into two paths. One of the two currents flows directly through the collector of transistor Q2 to the emitter of transistor Q2, while the other current flows to the emitter of transistor Q2 after flowing through the shunt resistor RA. The two currents are finally gathered together at the emitter of transistor Q2, and then connected to the base of transistor Q1, forming a loop to the ground through the constant current resistor Rs.

[0053] Among them, since the voltage of the constant current resistor Rs is equal to the voltage between the base of the transistor Q1 and the emitter of the transistor Q1, the added shunt resistor RA does not affect the constant current effect of the TLCC circuit. The shunt resistor RA connected in parallel between the collector of the transistor Q2 and the emitter of the transistor Q2 has a very significant shunt and power consumption function, which can better realize the power consumption transfer of the transistor Q2 and further improve the reliability and safety of the circuit. In addition, when outputting a low current constant current, such as in an output application below 10mA, the shunt resistor RA can be omitted.

[0054] Embodiment three:

[0055] See also Figure 3 , further comprising a dimming module, the dimming module comprising a diode D3, a current limiting resistor R4 and a pulse width modulator PWM, the communication interface of the pulse width modulator PWM being connected to one end of the voltage dividing resistor R2, one end of the voltage dividing resistor R3 and the base of the transistor Q3 through the diode D3 and the current limiting resistor R4;

[0056] The pulse width modulator PWM switches the PWM signal to a suspended or low level state, and uses the transistor Q3 to turn on the over-temperature protection module, thereby making the LED load and the photovoltaic module conductive;

[0057] The pulse width modulator PWM switches the PWM signal to a high level state and uses the transistor Q3 to turn off the over-temperature protection module, thereby disconnecting the phase between the LED load and the photovoltaic module.

[0058] The rest is the same as in the first embodiment.

[0059] In the dimming module, the diode D3 is used as an isolation diode to isolate the signal of the pulse width modulator PWM, thereby isolating the diode D1.

[0060] When dimming is required, when the pulse width modulator PWM switches the PWM signal to a suspended or low level state, the transistor Q3 is not started, the collector of the transistor Q3 is regarded as a suspended invalid state, and the drive circuit realizes a 100% constant current setting output; when the pulse width modulator PWM switches the PWM signal to a high level state, the Vbe of the transistor Q3 is turned on, so that the collector of the transistor Q3 to the emitter of the transistor Q3 is grounded, so that the base of the transistor Q2 is regarded as grounded through the collector of the transistor Q3, forcing the transistor Q2 to turn off, so that the LED load cannot form a normal working circuit, and finally the whole system is in standby. In summary, the high and low levels of the pulse width modulator PWM can be connected, so as to adjust the opening angle of the transistor Q3 to realize digital intelligent dimming control.

[0061] Embodiment 4:

[0062] See also Figure 4 A shunt resistor RA is connected between the collector of the transistor Q2 and the emitter of the transistor Q2.

[0063] The rest is the same as in Example 3.

[0064] The present invention forms a complete ecosystem through the cooperation of photovoltaic modules, over-temperature protection modules and LED loads, and realizes the functions of automatic charging during the day and automatic lighting at night; by setting the switch K1 after the charging circuit of the energy storage battery BT, the opening and closing state of the switch K1 is prevented from affecting the charging of the battery, ensuring that the energy storage battery BT can be charged uninterruptedly, and preventing the occurrence of system failures caused by the contact resistance and mechanical damage of the switch K1; by setting the switch K1 to a manual switch mode, it is easy to install, and it is always kept in a disconnected state before product production, packaging and installation, and kept in a closed state after installation, so as to start the entire drive circuit; by setting the transistor Q1, the transistor Q2, the starting resistor R1 and the constant current resistor Rs to form an over-temperature protection module, the current flowing through the constant current resistor Rs is equal to the loop current of the LED load, and the voltage of the constant current resistor Rs is equal to the voltage between the base and the emitter of the transistor Q1, so that Q1Vbe is close to a fixed The characteristic of the value can freely adjust the resistance parameter of the constant current resistor Rs according to the need to realize the automatic adjustment of the constant output current. There is no need to use a dedicated constant current chip, which is less affected by the price and supply of the chip. It can also alleviate the problem of the lack of integrated circuit chips to a certain extent. The overall circuit has obvious advantages, outstanding performance, low cost and high cost performance. It can utilize the inherent temperature drift characteristics of the transistor, so that when the circuit itself or the external temperature is higher than the threshold temperature of the transistor, the constant output current is reduced, and when the drive circuit is released from the abnormal temperature rise state, the normal constant output current is restored. The whole process is repeated, thereby realizing the characteristic of automatic over-temperature protection. By setting a shunt resistor RA between the collector of the transistor Q2 and the emitter of the transistor Q2, the power consumption transfer of the transistor Q2 can be better realized, and the reliability and safety of the circuit can be further improved. Through the access of the high and low levels of the pulse width modulator PWM, the opening angle of the transistor Q3 can be adjusted to realize digital intelligent dimming control.

[0065] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A solar intelligent control TLCC drive circuit, Features: It includes a photovoltaic module, an over-temperature protection module and an LED load, wherein the photovoltaic module supplies power to the LED load through the over-temperature protection module, and the photovoltaic module includes a photovoltaic solar panel S1, a diode D1, a diode D2, an energy storage battery BT, a voltage-dividing resistor R2, a voltage-dividing resistor R3, a switch K1 and a transistor Q3, wherein the base of the transistor Q3 is connected to the V- interface of the photovoltaic solar panel S1 through the voltage-dividing resistor R3 and is connected to the V+ interface of the photovoltaic solar panel S1 through the voltage-dividing resistor R2 and the diode D1, the emitter of the transistor Q3 is connected to the V- interface of the photovoltaic solar panel S1, the diode D2 and the energy storage battery BT are connected in series between the V+ interface and the V- interface of the photovoltaic solar panel S1, one end of the switch K1 is arranged between the diode D2 and the energy storage battery BT and the other end is respectively connected to the positive terminal of the LED load and the over-temperature protection module; When the photovoltaic solar panel S1 receives sunlight radiation, the energy storage battery BT is charged, and Q3 turns off the over-temperature protection module, thereby disconnecting the LED load from the photovoltaic module; When the photovoltaic solar panel S1 is not exposed to sunlight, the energy storage battery BT discharges, and Q3 turns on the over-temperature protection module, thereby conducting between the LED load and the photovoltaic module; The over-temperature protection module includes a transistor Q1, a transistor Q2, a starting resistor R1 and a constant current resistor Rs. The collector of the transistor Q1, the base of the transistor Q2 and the collector of the transistor Q3 are connected and connected to the positive terminal of the LED load and one end of the switch K1 through the starting resistor R1. The base of the transistor Q1 is connected to the emitter of the transistor Q2 and connected to the V-interface of the photovoltaic solar panel S1 through the constant current resistor Rs. The emitter of the transistor Q1 is connected to the V-interface of the photovoltaic solar panel S1, and the negative terminal of the LED load is connected to the collector of the transistor Q2. It also includes a dimming module, which includes a diode D3, a current limiting resistor R4 and a pulse width modulator PWM, and a communication interface of the pulse width modulator PWM is connected to one end of the voltage dividing resistor R2, one end of the voltage dividing resistor R3 and the base of the transistor Q3 through the diode D3 and the current limiting resistor R4; The pulse width modulator PWM switches the PWM signal to a suspended or low level state, and uses the transistor Q3 to turn on the over-temperature protection module, thereby making the LED load and the photovoltaic module conductive; The pulse width modulator PWM switches the PWM signal to a high level state and uses the transistor Q3 to turn off the over-temperature protection module, thereby disconnecting the phase between the LED load and the photovoltaic module.

2. A solar intelligent control TLCC driving circuit as claimed in claim 1, Features: The energy storage battery BT is a lithium battery pack with a charge and discharge protection plate.

3. A solar intelligent control TLCC driving circuit as claimed in claim 2, Features: The switch K1 is a manual switch.

4. A solar intelligent control TLCC driving circuit as claimed in claim 3, Features: A shunt resistor RA is connected between the collector of the transistor Q2 and the emitter of the transistor Q2.

5. A solar intelligent control TLCC driving circuit according to any one of claims 2 to 4, Features: The TLCC driving circuit exhibits a constant current output characteristic during normal operation and the calculation formula is as follows: Among them, Iout_CC is the constant output current, Q1Vbe is the voltage between the base and the emitter of the transistor Q1, and Rs is the resistance of the constant current resistor Rs.

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