CN215073045U

CN215073045U - A Solar Intelligent Controlled TLCC Drive Circuit

Info

Publication number: CN215073045U
Application number: CN202121463902.0U
Authority: CN
Inventors: 刘磊
Original assignee: Hangzhou Flint Lighting Co ltd
Current assignee: Hangzhou Flint Lighting Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-12-07
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a solar energy intelligent control type TLCC drive circuit, which comprises a photovoltaic module, an over-temperature protection module and an LED load. 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, diode D1, diode D2, energy storage battery BT, voltage divider resistor R2, voltage divider resistor R3, switch K1 and triode Q3, the base of said triode Q3 is connected to the voltage of the photovoltaic solar panel S1 through the voltage divider resistor R3 The interface is connected simultaneously with 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 with the V-interface of the photovoltaic solar panel S1, the diode D2 and the energy storage The battery BT is connected in series between the V+ interface and the V- interface of the photovoltaic solar panel S1, one end of the switch K1 is set between the diode D2 and the energy storage battery BT, and the other end is connected to the positive end of the LED load and the over-temperature protection respectively. The modules are connected, charging during the day and lighting automatically at night.

Description

Solar intelligent control type TLCC drive circuit

[ technical field ] A method for producing a semiconductor device

The utility model relates to a drive circuit's technical field, especially a solar energy intelligent control type TLCC (Triode linear constant current) drive circuit's technical field.

[ background of the invention ]

The LED lamp is generally recognized as a green fourth-generation light source, has the advantages of high efficiency, long service life, safety, environmental protection, small volume, high reliability, high response speed and the like, is mature in technology, and is widely applied to various fields. Because the LED is a constant-current working load, the LED can be ensured to always maintain safe and stable working conditions by adopting constant-current driving. The conventional driving circuit of the LED lamp usually depends on a special constant current driving chip to carry out constant current driving, so that the production capacity of a product is greatly influenced by the market supply condition of the chip, the price of the product is easy to change along with the price rise of the chip, and the stable production is difficult to ensure. The drive circuit which utilizes part of discrete components to realize constant current drive has the problems of complex circuit structure, higher cost and the like, and the cost performance and reliability of the drive circuit adopting a special chip can not be achieved in actual production.

The forward voltage VF of the LED lamp has a negative temperature characteristic, which is characterized by a decrease in VF value with increasing temperature. When the LED lamp is driven at a constant voltage, the LED lamp temperature rises due to ambient temperature and self-heating, and the VF value decreases, which causes the on-current of the LED lamp to increase, which in turn causes the LED temperature to further rise and the VF value to further decrease. In terms of power, this process is a positive feedback process, which eventually leads to thermal runaway of the LED lamp, affecting the reliability and the service life of the LED lamp. In order to avoid the above problems, the over-temperature protection of the LED driving circuit has to be considered.

In addition, with the continuous innovation of LED driving technology, user demands are changing continuously, and the demands have gradually changed from the originally required high brightness and low power efficiency to the demands of dimming characteristics and light quality. However, unlike a conventional incandescent lamp, an LED lamp is not a pure resistive load, and if a dimmer is directly provided for dimming, a problem of serious flicker or the like is caused, and thus, a solution is needed.

Solar energy is used as a natural renewable energy source, is inexhaustible, and the research on applications of solar energy conversion and the like in scientific and technical aspects undoubtedly brings great improvement to real life. At present, in the solar lamp field, in order to realize that lamps and lanterns switch over at daytime and night's automatic switch, people usually can set up some photosensitive sensor on the singlechip of lamps and lanterns to utilize photosensitive sensor response ambient light's change, the switch of rethread singlechip control lamps and lanterns, there is the complicated and electric energy that consumes of whole sensitization flow, awaits urgently and improves.

[ Utility model ] content

The utility model aims at solving the problem among the prior art, provide a solar energy intelligent control type TLCC drive circuit, can invariable output current, have the characteristic of excess temperature automatic protection, can adjust luminance according to required to automatic charging daytime and night automatic illumination.

To achieve the above object, the present invention provides a solar intelligent control 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, 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 triode Q3, a base of the triode Q3 is connected to a V-interface of the photovoltaic solar panel S1 through the voltage dividing resistor R3 and is connected to a V + interface of the photovoltaic solar panel S1 through the voltage dividing resistor R2 and a diode D1, an emitter of the triode 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 of the switch K1 is respectively connected with the positive end of the LED load and the over-temperature protection module;

when the photovoltaic solar panel S1 receives solar illumination radiation, the energy storage battery BT is charged, and the Q3 closes the over-temperature protection module, so that the LED load is disconnected from the photovoltaic module;

when the photovoltaic solar panel S1 does not receive solar illumination radiation, the energy storage battery BT discharges, and the Q3 opens the over-temperature protection module, so that the LED load and the photovoltaic module are conducted.

Preferably, the over-temperature protection module comprises a triode Q1, a triode Q2, a starting resistor R1 and a constant current resistor Rs, wherein a collector of the triode Q1 and a base of the triode Q2 are connected with a collector of the triode Q3 and are connected with a positive terminal of the LED load and one end of a switch K1 through the starting resistor R1, a base of the triode Q1 is connected with an emitter of the triode Q2 and is connected with a V-interface of the photovoltaic solar panel S1 through the constant current resistor Rs, an emitter of the triode Q1 is connected with the V-interface of the photovoltaic solar panel S1, and a negative terminal of the LED load is connected with a collector of the triode Q2.

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

Preferably, the switch K1 is a manual switch.

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

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

；

wherein, Iout _ CC is a constant output current, Q1Vbe is a voltage between a base electrode and an emitter electrode of the triode Q1, and Rs is a resistance of a constant current resistor Rs.

Preferably, the dimming circuit further comprises a dimming module, wherein the dimming module comprises 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 with one end of a voltage-dividing resistor R2, one end of a voltage-dividing resistor R3 and a base of a triode Q3 through a diode D3 and a current-limiting resistor R4;

the PWM switches PWM signals to a suspended or low-level state, and the over-temperature protection module is started by the triode Q3, so that the LED load is conducted with the photovoltaic module;

the PWM switches the PWM signal to a high level state, and the over-temperature protection module is closed by the triode Q3, so that the phase between the LED load and the photovoltaic module is disconnected.

The utility model has the advantages that: the utility model forms a complete ecological system by the mutual cooperation of the photovoltaic module, the over-temperature protection module and the LED load, and realizes the functions of automatic charging in the daytime and automatic lighting at night; the switch K1 is arranged behind the charging circuit of the energy storage battery BT, so that the influence of the opening and closing state of the switch K1 on the charging of the storage battery is avoided, the energy storage battery BT can be ensured to be charged uninterruptedly, and the system fault caused by the contact resistance and the mechanical damage of the switch K1 is prevented; the switch K1 is set to be in a manual switch mode, so that the installation is convenient, the switch K1 is always kept in an open state before the production and packaging of the product are completed and is kept in a closed state after the product is assembled, and the whole driving circuit is started; the over-temperature protection module is formed by arranging the triode Q1, the triode Q2, the starting resistor R1 and the constant current resistor Rs together, meanwhile, the current flowing through the constant current resistor Rs is equal to the loop current of an LED load, and the voltage of the constant current resistor Rs is equal to the voltage between the base electrode and the emitting electrode of the triode Q1, so that the characteristic that Q1Vbe is close to a fixed value is utilized, the resistance parameter of the constant current resistor Rs is freely adjusted according to needs, the automatic adjustment of constant output current is realized, a special constant current chip is not needed, the influence of the price and the supply of the chip is small, the problem that the integrated circuit lacks the chip can be relieved to a certain extent, the whole circuit has obvious advantages, the performance is outstanding, the cost is low, and the cost performance is high; the inherent temperature drift characteristic of the triode can be utilized, so that when the temperature of the circuit or the outside is higher than the threshold temperature of the triode, the constant output current is reduced, and when the abnormal temperature rise state of the driving circuit is relieved, the normal constant output current is recovered, the whole process is repeated, and the characteristic of automatic over-temperature protection is realized; by arranging the shunt resistor RA between the collector of the triode Q2 and the emitter of the triode Q2, the power consumption transfer of the triode Q2 can be better realized, and the reliability and the safety of the circuit are further improved; the high and low level of the PWM can be switched on by the pulse width modulator, so that the digital intelligent dimming control is realized by adjusting the opening angle of the triode Q3.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic structural view of the second embodiment;

FIG. 3 is a schematic structural view of the third embodiment;

FIG. 4 is a schematic structural diagram of the fourth embodiment.

[ detailed description ] embodiments

The first embodiment is as follows:

referring to fig. 1, the utility model relates to a solar energy intelligent control type TLCC drive circuit, including photovoltaic module, excess temperature protection module and LED load, photovoltaic module supplies power for the LED load through excess temperature protection module, photovoltaic module includes photovoltaic solar panel S1, diode D1, diode D2, energy storage battery BT, divider resistance R2, divider resistance R3, switch K1 and triode Q3, triode Q3 ' S base passes through divider resistance R3 and is connected with photovoltaic solar panel S1 ' S V-interface and is connected with photovoltaic solar panel S1 ' S V + interface through divider resistance R2 and diode D1 simultaneously, triode Q3 ' S projecting pole is connected with photovoltaic solar panel S1 ' S V-interface, diode D2 and energy storage battery BT are established ties between photovoltaic solar panel S1 ' S V + interface and V-interface, switch K1 ' S one end sets up between diode D2 and energy storage battery BT and the positive terminal of LED load respectively The over-temperature protection module is connected with the temperature sensor;

The over-temperature protection module comprises a triode Q1, a triode Q2, a starting resistor R1 and a constant current resistor Rs, wherein a collector of the triode Q1 and a base of the triode Q2 are connected with a collector of the triode Q3 and are connected with a positive electrode end of an LED load and one end of a switch K1 through the starting resistor R1, a base of the triode Q1 is connected with an emitter of a triode Q2 and is connected with a V-interface of the photovoltaic solar panel S1 through the constant current resistor Rs, an emitter of the triode Q1 is connected with the V-interface of the photovoltaic solar panel S1, and a negative electrode end of the LED load is connected with a collector of the triode Q2.

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

The switch K1 is a manual switch.

The TLCC driving circuit presents constant current output characteristics when working normally, and the calculation formula is as follows:

；

The utility model discloses the working process:

during the day and when the switch K1 is closed, the photovoltaic solar panel S1 receives solar illumination radiation, and the output interface generates direct current voltage. Then, the dc voltage is divided into two paths, one path generates a divided voltage ground through the diode D1, the voltage dividing resistor R2 and the voltage dividing resistor R3, and the other path is divided into two paths through the diode D2, so as to be connected to the positive terminals of the energy storage battery BT and the LED load, respectively. At this time, since the divider resistor R2 is connected to the base of the transistor Q3, the base of the transistor Q3 is in a high level state, and 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, and the base of the transistor Q2 is grounded through the collector of the transistor Q3, so that the transistor Q2 is forced to be turned off, the LED load cannot form a normal working circuit, and finally the whole system is in a standby state. Therefore, during the day, the photovoltaic solar panel S1 can only charge the energy storage battery BT, and the LED load is in the automatic light-off state. In addition, because the energy storage battery BT is a lithium battery pack with a charging and discharging protection plate, the charging safety and reliability can be effectively ensured.

At night and when the switch K1 is closed, the photovoltaic solar panel S1 does not receive solar illumination radiation, and the output interface cannot generate direct current voltage. At this time, the diode D1 divides the voltage into a low level signal through the voltage dividing resistor R2 and the voltage dividing resistor R3, the transistor Q3 is not turned on, and the collector of the transistor Q3 is regarded as a floating inactive state, so that the transistor Q2 is normally turned on under the action of the resistor R1. Meanwhile, the energy storage battery BT supplies power to the LED load through the switch K1 on one hand, and provides a collector bias resistor for the transistor Q1 through the starting resistor R1 and provides a base starting voltage for the transistor Q2 on the other hand. 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 with the emitter of the transistor Q2 and is grounded through the constant current resistor Rs, and the collector of the transistor Q2 is connected with the cathode of the LED load, so that the transistor Q1 can be used for controlling the on-off state of the transistor Q2.

For the LED load, current flows from the V + interface of the photovoltaic solar panel S1 through the diode D2 and the switch K1 sequentially through the positive terminal and the negative terminal of the LED load, then flows through the collector of the triode Q2 to the emitter of the triode Q2, and finally is grounded through the constant current resistor Rs, thereby forming a complete electrical loop. At this time, the loop current of the LED load is equal to the current flowing through the constant current resistor Rs. And because the two ends of the constant current resistor Rs are respectively connected with the base of the triode Q1 and the emitter of the triode Q1, the voltage of the constant current resistor Rs is equal to the voltage between the base of the triode Q1 and the emitter of the triode Q1, namely Q1 Vbe. As is well known, Vbe is the characteristic voltage of a triode and approaches a fixed value, such as 0.6-0.7V for a silicon tube and 0.2-0.3V for a germanium tube. Therefore, the constant output current of the TLCC driving circuit can be adjusted by adjusting the resistance parameter of the constant current resistor Rs. Taking the case that the Q1Vbe is 0.6V, the calculation formula of the constant output current Iout _ CC is as follows:

；

In the working process, the TLCC driving circuit presents a constant current output characteristic, and the transistor Q1 detects the temperature rise condition at any moment, so that the over-temperature automatic protection function is realized. The principle of the over-temperature automatic protection is as follows:

the triode has the inherent temperature drift characteristic that when the temperature of the circuit or the outside is higher than the threshold temperature of the triode, the Vbe of the triode gradually decreases along with the increase of the temperature. That is, when the transistor Q1 detects that the temperature is too high, the Q1Vbe will be lowered accordingly, so that the current of the constant current resistor Rs is pulled low, and Iout _ CC is lowered; when the TLCC driving circuit relieves the abnormal temperature rise state, Q1Vbe is recovered to be normal, and the voltage detected at two ends of the constant current resistor Rs is recovered to be normal, so that the constant current state is set, and the whole process is repeated.

Example two:

referring to fig. 2, a shunt resistor RA is connected between the collector of the transistor Q2 and the emitter of the transistor Q2.

The other steps are the same as those of the first embodiment.

The shunt resistor RA which is added in the TLCC driving circuit and connected in parallel between the collector of the triode Q2 and the emitter of the triode Q2 has unique shunt and power consumption division functions, and a circuit which enables the positive end of the LED load to flow into the negative end of the LED load can be divided into two circuits. One of the two currents flows to the emitter of the transistor Q2 directly through the collector of the transistor Q2, and the other current flows to the emitter of the transistor Q2 after flowing through the shunt resistor RA. The two paths of current are finally gathered together at the emitter of the triode Q2, and then are connected with the base of the triode Q1, and form a loop through a constant current resistor Rs.

Because the voltage of the constant current resistor Rs is equal to the voltage between the base of the triode Q1 and the emitter of the triode 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 triode Q2 and the emitter of the triode Q2 has very obvious shunting and power-dividing effects, power consumption transfer of the triode Q2 can be better realized, and reliability and safety of the circuit are further improved. In addition, the shunt resistor RA can be omitted for use in output applications where a low current constant current is output, such as below 10 mA.

Example three:

referring to fig. 3, the lighting control circuit further includes a dimming module, the dimming module 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 a voltage dividing resistor R2, one end of a voltage dividing resistor R3 and a base of a transistor Q3 through a diode D3 and a current limiting resistor R4;

The other steps are the same as those of the first embodiment.

In the dimming module, the diode D3 as an isolation diode can isolate the signal of the pulse width modulator PWM, thereby isolating the diode D1.

When dimming is needed, when the pulse width modulator PWM switches the PWM signal to a suspension or low level state, the triode Q3 is not started, the collector of the triode Q3 is regarded as a suspension invalid state, and the driving circuit realizes 100% constant current setting output; when the pulse width modulator PWM switches the PWM signal to the high level state, the Vbe of the transistor Q3 is turned on, and 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, and the transistor Q2 is forced to be turned off, so that the LED load cannot form a normal working loop, and finally the whole system is in standby. In summary, the digital intelligent dimming control can be realized by adjusting the turn-on angle of the transistor Q3 through the high and low level switching of the PWM.

Example four:

referring to fig. 4, a shunt resistor RA is connected between the collector of the transistor Q2 and the emitter of the transistor Q2.

The other steps are the same as those in the third embodiment.

The utility model forms a complete ecological system by the mutual cooperation of the photovoltaic module, the over-temperature protection module and the LED load, and realizes the functions of automatic charging in the daytime and automatic lighting at night; the switch K1 is arranged behind the charging circuit of the energy storage battery BT, so that the influence of the opening and closing state of the switch K1 on the charging of the storage battery is avoided, the energy storage battery BT can be ensured to be charged uninterruptedly, and the system fault caused by the contact resistance and the mechanical damage of the switch K1 is prevented; the switch K1 is set to be in a manual switch mode, so that the installation is convenient, the switch K1 is always kept in an open state before the production and packaging of the product are completed and is kept in a closed state after the product is assembled, and the whole driving circuit is started; the over-temperature protection module is formed by arranging the triode Q1, the triode Q2, the starting resistor R1 and the constant current resistor Rs together, meanwhile, the current flowing through the constant current resistor Rs is equal to the loop current of an LED load, and the voltage of the constant current resistor Rs is equal to the voltage between the base electrode and the emitting electrode of the triode Q1, so that the characteristic that Q1Vbe is close to a fixed value is utilized, the resistance parameter of the constant current resistor Rs is freely adjusted according to needs, the automatic adjustment of constant output current is realized, a special constant current chip is not needed, the influence of the price and the supply of the chip is small, the problem that the integrated circuit lacks the chip can be relieved to a certain extent, the whole circuit has obvious advantages, the performance is outstanding, the cost is low, and the cost performance is high; the inherent temperature drift characteristic of the triode can be utilized, so that when the temperature of the circuit or the outside is higher than the threshold temperature of the triode, the constant output current is reduced, and when the abnormal temperature rise state of the driving circuit is relieved, the normal constant output current is recovered, the whole process is repeated, and the characteristic of automatic over-temperature protection is realized; by arranging the shunt resistor RA between the collector of the triode Q2 and the emitter of the triode Q2, the power consumption transfer of the triode Q2 can be better realized, and the reliability and the safety of the circuit are further improved; the high and low level of the PWM can be switched on by the pulse width modulator, so that the digital intelligent dimming control is realized by adjusting the opening angle of the triode Q3.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides a solar energy intelligent control type TLCC drive circuit which characterized in that:

comprises 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, 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 triode Q3, the base of the transistor Q3 is connected to the V-interface of the photovoltaic solar panel S1 through a voltage dividing resistor R3 and to the V + interface of the photovoltaic solar panel S1 through a voltage dividing resistor R2 and a diode D1, the emitter of the triode Q3 is connected with 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 of the switch K1 is respectively connected with the positive end of the LED load and the over-temperature protection module;

2. The solar intelligent control type TLCC driving circuit as claimed in claim 1, wherein: the over-temperature protection module comprises a triode Q1, a triode Q2, a starting resistor R1 and a constant current resistor Rs, wherein a collector of the triode Q1 and a base of the triode Q2 are connected with a collector of the triode Q3 and are connected with a positive electrode end of an LED load and one end of a switch K1 through the starting resistor R1, a base of the triode Q1 is connected with an emitter of a triode Q2 and is connected with a V-interface of the photovoltaic solar panel S1 through the constant current resistor Rs, an emitter of the triode Q1 is connected with the V-interface of the photovoltaic solar panel S1, and a negative electrode end of the LED load is connected with a collector of the triode Q2.

3. A solar intelligent control TLCC driver circuit as claimed in claim 2, wherein: the energy storage battery BT is a lithium battery pack with a charge and discharge protection plate.

4. A solar intelligent control TLCC driver circuit as claimed in claim 3, wherein: the switch K1 is a manual switch.

5. The solar intelligent control type TLCC driver circuit of claim 4, wherein: and a shunt resistor RA is connected between the collector of the triode Q2 and the emitter of the triode Q2.

6. A solar intelligent control TLCC driver circuit as claimed in any one of claims 2 to 5, wherein: the TLCC driving circuit presents constant current output characteristics when working normally, and the calculation formula is as follows:

；

7. A solar intelligent control TLCC driver circuit as claimed in any one of claims 2 to 5, wherein: the dimming circuit also comprises a dimming module, wherein the dimming module comprises 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 with one end of a voltage-dividing resistor R2, one end of a voltage-dividing resistor R3 and the base of a triode Q3 through a diode D3 and a current-limiting resistor R4;