CN211352513U

CN211352513U - Solar light-operated boosting LED functional circuit

Info

Publication number: CN211352513U
Application number: CN201921302698.7U
Authority: CN
Inventors: 陈长兴; 杨义凯
Original assignee: Shanghai Shiningic Electronic Technology Co ltd
Current assignee: Shanghai Shiningic Electronic Technology Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-08-25
Anticipated expiration: 2029-08-09

Abstract

The utility model provides a solar energy light-operated boost LED functional circuit, including internal circuit and peripheral circuit, the peripheral circuit includes inductance L, switch button K, solar panel solar, input capacitance Cin, the output vdd of supply battery BAT, output capacitance Cout and eight functional circuit's output L1 and L2, the internal circuit includes boost circuit, solar charging control circuit and eight functional circuit; the booster circuit and the solar charging control circuit cooperatively control the charging process of the light-operated power supply battery BAT, and the output ends L1 and L2 of the eight-function circuit output the functional effect of the load LED; the internal circuit further comprises a long-press turn-off module, a pull-up resistor is arranged inside the switch Key K, and when the output ends L1 and L2 of the eight-function circuit output the function effect of the LED, the Key point of the switch Key K is high; the long-press turn-off module controls the eight-function circuit to provide a MODE8 switching signal and/or turn off the booster circuit according to the low time length of the Key point of the switch Key.

Description

Solar light-operated boosting LED functional circuit

Technical Field

The utility model relates to a lighting circuit designs technical field, especially relates to a solar light-operated LED functional circuit that steps up.

Background

The LED is called as a fourth generation illumination light source or a green light source, has the characteristics of energy conservation, environmental protection, long service life, small volume and the like, and is widely applied to the fields of various indications, display, decoration, backlight sources, common illumination, urban night scenes and the like. Especially, the solar energy supplementary energy and control mode are commonly adopted in outdoor LED lighting application such as parks, squares, outdoor advertising lamps and the like, so that the current sustainable energy can be fully utilized, the consumption of the traditional energy is greatly reduced, and the emission of pollution is reduced. In practical application, the LED light string often needs to be supplied with power more than the on-state voltage of the LED light, which requires a boosting function when a solar power supply battery is used.

The LED controller circuit with the boosting function widely applied to the market mainly comprises the following circuit forms: a constant current control circuit, a constant voltage control circuit, a PWM (pulse width modulation) control circuit, and the like. The constant current control circuit and the constant voltage control circuit are often used in conjunction with each other due to the complex internal structure, the number of peripheral pins, and the need for some other components for solar charging and control, which substantially increases the cost.

When the LED lamp is controlled by boosting the voltage of the battery, the electric quantity of the battery is less and less, and the LED lamp is darker and darker. When the electric quantity of the battery is reduced to a certain value, the LED lamp is turned off, but the battery is turned back due to over discharge along with the turning-off of the output LED lamp, and the LED lamp starts to work again at the moment. This can cause the LED lamp to blink after the battery charge is low. When the LED lamp is not in use, the internal static power consumption reduces the battery life.

In addition, when the battery system controls the LED functional circuit to be applied, when the battery system is stored for a long time, a switch is usually required to be externally connected to the battery end to save power consumption, and after the switch is connected, a diode is usually required to be added for normal charging of solar energy particularly after power failure, so that a client needs to increase the area of a PCB (printed circuit board) and the number of peripheral tubes in the practical application process, namely the cost of outdoor LED illumination practical use is greatly increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solar light-operated LED functional circuit that steps up of low-power consumption to the collection steps up, light-operated, long press turn-off and eight function control integrated chip as an organic whole, the effectual circuit that has the same function of having solved needs a large amount of peripheral circuits, has reduced the application cost, has also avoided the interference scheduling problem that arouses because of the peripheral circuit is complicated simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a solar light-control boosting LED functional circuit comprises an internal circuit and a peripheral circuit, wherein the peripheral circuit comprises an inductor L, a switch key K, a solar panel solar, an input capacitor Cin, an output end vdd of a power supply battery BAT, an output capacitor Cout, and output ends L1 and L2 of an eight-functional circuit, and the internal circuit comprises a boosting circuit, a solar charging control circuit and an eight-functional circuit; the boost circuit and the solar charging control circuit cooperatively control the charging process of the power supply battery BAT, and the output ends L1 and L2 of the eight-function circuit control the functional effect of the load LED; the eight-function circuit is characterized in that the internal circuit further comprises a long press turn-off module, a pull-up resistor is arranged inside the switch Key K, and when the output ends L1 and L2 of the eight-function circuit output the function effect of the LED, the Key point of the switch Key K is high; the long-press turn-off module controls the eight-function circuit to provide a MODE8 switching signal and/or turn off the booster circuit according to the Key point of the switch Key K as the low time.

Preferably, when the switch key K is pressed for a short time, the long-press turn-off module controls the output terminals L1 and L2 of the eight-function circuit to control the switching of the function and effect of the load LED, and when the switch key K is pressed for a long time, the long-press turn-off module controls the outputs of the output terminals L1 and L2 of the eight-function circuit and the turn-off of the voltage boosting circuit, wherein the time of the short press is less than T1, and the time of the long press is greater than or equal to T1.

Preferably, the long press turn-off module includes:

the input end of the power-on reset module is connected with the output end vdd of a power supply battery BAT and a Key point of the switch Key K, and the output end vdd of the power supply battery BAT provides a reset signal through the power-on reset module;

the input end of the function switching module is connected with the output end of the switch key K, a MODE8 switching signal for function switching is provided for the eight-function circuit through function switching, and when the switch key K is grounded, the output end of the function switching module outputs the MODE8 switching signal;

the input end of the reset circuit module is connected with the output end of the switch key K and the reset signal;

the input end of the timing circuit module is connected with the output end of the switch key K and the output end of the reset circuit module;

the input end of the unlocking circuit module is connected with the output end of the switch key K and the reset signal;

the input end of the locking circuit module is connected with the output ends of the timing circuit module and the unlocking circuit module;

when the switch key K is connected with a low potential, the timing circuit module starts to work, when the time T1 required to be turned OFF is reached, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL to be a high potential, and if the time T1 required is not reached, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL not to change; wherein, when the lock signal OFF _ CTL is high, the booster circuit and/or other circuits stop operating.

Preferably, the long press shutdown module further comprises a jitter prevention circuit module for preventing interference pulses smaller than or equal to T2, wherein T1 is greater than T2.

Preferably, the anti-jitter circuit module is a DFF flip-flop.

Preferably, the solar charging control circuit comprises a resistor R1, a resistor R2, a resistor R3, an amplifier and an NMOS transistor MP 4; the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series between a battery BAT and a ground terminal, the negative end of the amplifier is connected with the connecting end of the resistor R1 and the resistor R2, the positive end of the amplifier is connected with a solar panel pin, the grid of the NMOS tube MP0 is connected with the output end EN1 of the amplifier, the drain of the NMOS tube MP0 is connected with the connecting end of the resistor R2 and the resistor R3, and the source of the NMOS tube MP0 is grounded.

Preferably, a pin LX of the boost circuit is connected to a drain of an NMOS transistor MN1 and a drain of a PMOS transistor MP1, a source of the NMOS transistor MN1 is grounded, a gate of the NMOS transistor MN1 is connected to one end of a Driver, a gate of the PMOS transistor MP1 is connected to one end of the Driver, the other end of the Driver is connected to one end of a PFM controller, the other end of the Driver receives the lock signal OFF _ CTL, the other two ends of the PFM controller are respectively connected to an enable signal EN1 and an output end of a comparator comp, a positive input end of the comparator comp is connected to a connection end of a resistor R7 and a resistor R8, a negative input end of the BG & Bias module is connected to an output end Vref, and the resistor R6, the resistor R7 and the resistor R8 are sequentially connected in series between a power supply vdd and a ground terminal.

Preferably, after the boost circuit stops working, if the power-on reset module is powered on again or the switch key K is connected to the low potential again, the timing circuit module and the locking circuit module are reset and unlocked respectively.

Preferably, the PFM controller further comprises a PWM controller.

Preferably, the load LED is a single-color LED string or an LED string composed of LEDs with multiple colors.

According to the above technical scheme, the utility model discloses a solar light accuse LED functional circuit that steps up provides except that solar charging, step up and the effective solution of the eight functional effect lamps of LED, it still has following beneficial effect:

firstly, the circuit can be used in a wider working voltage range, and when the power supply voltage is higher than the internally set lowest working voltage, the output voltage can be ensured not to be influenced by the power supply voltage and is always kept unchanged, namely, the circuit works in a constant voltage output mode;

secondly, the LED can be turned off when solar energy is charged, and the original LED state mode can be kept when the charging is finished;

the circuit adopts a low-power-consumption design, and the service life of the battery is ensured under the charging or non-connection LED state, so that the energy is greatly saved;

and fourthly, the most important function of long press turn-off is added, so that when the LED lamp is not required to be turned on, the power consumption is greatly saved, and the problem of LED flickering in the turn-off and turn-on process of the battery is solved.

Drawings

FIG. 1 shows that the utility model discloses a solar energy light-operated LED functional circuit schematic diagram that steps up

FIG. 2 is a schematic diagram of a solar charging control circuit according to an embodiment of the present invention

FIG. 3 is a functional block diagram of the long press shutdown module shown in FIG. 1

FIG. 4 is a schematic circuit diagram of the turn-off module according to the embodiment of the present invention

FIG. 5 is a schematic diagram of the working waveform of the turn-off module according to the embodiment of the present invention

Fig. 6 is a schematic diagram of a specific circuit of the power-on reset module according to an embodiment of the present invention

FIG. 7 is a schematic diagram of an output waveform of the power-on reset module shown in FIG. 6

FIG. 8 is a schematic circuit diagram of an embodiment of the present invention, showing an eight-function switching module

FIG. 9 is a schematic diagram of switching waveforms of eight functional modules according to an embodiment of the present invention

FIG. 10 is a schematic diagram of a boost module circuit according to an embodiment of the present invention

FIG. 11 is a schematic diagram of a driving module circuit according to an embodiment of the present invention

Detailed Description

The following description of the present invention will be made in detail with reference to the accompanying drawings 1 to 5.

Referring to fig. 1, fig. 1 is a schematic diagram of a solar light-controlled boost LED functional circuit according to the present invention. As shown in the figure, the solar light-controlled boost LED functional circuit comprises an internal circuit and a peripheral circuit, wherein the peripheral circuit comprises an inductor L, a switch key K, a solar panel solar, an input capacitor Cin, an output end vdd of a power supply battery BAT, an output capacitor Cout, and output ends L1 and L2 of an eight-function circuit, and the internal circuit comprises a boost circuit, a solar charge control circuit and an eight-function circuit; the boost circuit and the solar charging control circuit cooperatively control the charging process of the power supply battery BAT, and the output ends L1 and L2 of the eight-function circuit control the functional effect of the load LED.

Specifically, in the embodiment of the present invention, the load LED may be a single color LED string or an LED string composed of LEDs with multiple colors, which is not limited herein. That is to say, in practical application, according to customer's needs, for example, the LED lamp that only plays the role of illumination, the LED lamp that has the effect of gradually lighting and gradually dimming, the LED lamp that has the effect of horse race lamp, the LED lamp that has the function of single flash and double flash, etc. can be connected. Therefore, the utility model discloses an eight functional circuit not only satisfy the load requirement, still provide some optional LED lamp effects.

Referring to fig. 2, fig. 2 is a schematic diagram of a solar charging control circuit according to an embodiment of the present invention. The solar charging control circuit comprises a resistor R1, a resistor R2, a resistor R3, an amplifier and an NMOS tube MP 4; the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series between the battery BAT and the ground terminal, the negative terminal of the amplifier is connected with the connecting end of the resistor R1 and the resistor R2, the positive terminal of the amplifier is connected with the solar panel pin, the gate of the NMOS transistor MP0 is connected with the output end of the amplifier to output the enable signal EN1, the drain of the NMOS transistor MP0 is connected with the connecting end of the resistor R2 and the resistor R3, and the source of the NMOS transistor MP0 is connected with the ground terminal.

As shown in FIG. 2, as the illumination becomes stronger

When the output end of the amplifier outputs an enable signal EN1 which is high, the solar charging mode is entered, and the booster circuit is turned off; as the illumination becomes weaker

At this time, the output enable signal EN1 of the amplifier is low, and the solar charging mode is ended and the boost circuit continues to operate. In the circuit, the NMOS transistor MN0 plays a role of charging delay, preventing the critical condition encountered during solar charging and discharging.

Referring to fig. 1, as shown in the figure, the internal circuit further includes a long-press turn-off module, and the switch Key K has a pull-up resistor therein to ensure that the Key point of the switch Key K is at a high voltage level during normal operation. That is, when the user presses the switch key K for a short time (i.e., the switch key K is at a low level), the long-pressing off module controls the eight-function circuit to provide the MODE8 switching signal; when a user presses the switch key K for a long time, the long-time pressing turn-off module controls the eight-function circuit and/or turns off the booster circuit.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating functional modules of the long press shutdown module shown in fig. 1. As shown in the figures, the long press turn-off module in the embodiment of the present invention may include a power-on reset module, a function switching module, a reset circuit module, a timing circuit module, an unlocking circuit module, a jitter circuit module, and a locking circuit module. The input end of the power-on reset module is connected with the output end vdd of the power supply battery BAT and the Key point of the switch Key K, and the output end vdd of the power supply battery BAT provides a reset signal through the power-on reset module; the input end of the function switching module is connected with the output end of the switch key K, and the MODE8 switching signals for function switching are provided for the eight-function circuit through function switching. In addition, because the Key is accidentally touched or disturbed during use, an anti-shake circuit is added during design. When the Key is at low potential and less than time T2, the circuit defaults to not detect the Key signal, and only when the Key time is greater than time T2, the Key enters into function mode switching or long-time function detection.

Referring to fig. 4, fig. 4 is a schematic circuit diagram of a long press turn-off module according to an embodiment of the present invention. As shown, in the embodiment of the present invention, each functional module in the long press shutdown module may be composed of a plurality of DFF flip-flops and or gates. T1 and the following DFF flip-flop together form a timing circuit block, the following DFF flip-flop forms a locking circuit block, T2 and the following DFF flip-flop together form an anti-jitter circuit block, and the following DFF flip-flop forms an unlocking circuit block. In the embodiment of the utility model, the input end of the reset circuit module is connected with the output end of the switch key K and the reset signal; the input end of the timing circuit module is connected with the output end of the switch key K and the output end of the reset circuit module; the input end of the unlocking circuit module is connected with the output end of the switch key K and the reset signal; the input end of the locking circuit module is connected with the output ends of the timing circuit module and the unlocking circuit module.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating a working waveform of the long press turn-off module according to an embodiment of the present invention. As shown in the figure, when the switch key K is pressed for a short time, the long-press turn-off module controls the output terminals L1 and L2 of the eight-function circuit to control the switching of the function effect of the load LED, and when the switch key K is pressed for a long time, the long-press turn-off module controls the output terminals L1 and L2 of the eight-function circuit and the turn-off of the boost circuit, wherein the time of the short press is less than T1, and the time of the long press is greater than or equal to T1.

Referring to fig. 6, fig. 6 is a schematic circuit diagram of a power-on reset module according to an embodiment of the present invention. As shown, the circuit includes two PMOS transistors MP1 and MP2, a resistor R, a smith trigger and an inverter for generating a reset signal (as shown in fig. 7).

Referring to fig. 8, fig. 8 is a circuit diagram of a function switching module according to an embodiment of the present invention. As shown, the Key point of the switch Key K passes through the reset circuit, which can ensure that the circuit is reset each time the power is turned on again, so that the function returns to the MODE1 function again each time the power is reset. When the Key is grounded every time, a Key supply signal is converted from a high potential to a low potential, the circuit detects the low level at the moment, then the frequency division is carried out through the latch and the D trigger, so that signals A/nA, B/nB and C/nC are generated, 8 signals of MODE 1-MODE 8 are output through the MODE logic function circuit, and the signals are respectively controlled by A-B-C, nA-B-C, A-nB-C, nA-nB-C, A-B-nC, nA-B-nC, A-nB-nC and nA-nB-nC, so that eight functions are generated.

After the short-touch switch key K is pressed down, eight LED functions are selected and switched. That is, when the switch key K is turned to the low level, the timing circuit module starts to operate, and if the required time T2 is not reached, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL not to change. At this time, the output end of the timing circuit module outputs a MODE8 switching signal, that is, the output is output to perform function switching each time the Key is grounded. Referring to fig. 9, fig. 9 is a schematic diagram illustrating a switching waveform of an eight-function module according to an embodiment of the present invention.

Referring to fig. 10, fig. 10 is a schematic diagram of a boost circuit according to an embodiment of the present invention. As shown in the figure, a pin LX of the voltage boost circuit is connected to the drain of the NMOS transistor MN1 and the drain of the PMOS transistor MP1, the source of the NMOS transistor MN1 is grounded, the gate is connected to one end of the Driver, the gate of the PMOS transistor MP1 is connected to one end of the Driver, the other end of the Driver is connected to one end of the PFM controller, the other end of the Driver is connected to the lock signal OFF _ CTL, the other two ends of the PFM controller are respectively connected to the enable signal EN1 and the output end of the comparator comp, the positive input end of the comparator comp is connected to the connection end of the resistor R7 and the resistor R8, the negative input end of the comparator is connected to the output end Vref of the BG & Bias module (bandgap reference module), the BG & Bias module is used for generating the standard voltage Vref, and the resistors R6, R7 and R8 are sequentially connected in series between the power supply v and.

When the switch key K is pressed for a long time to reach the required turn-OFF time T1, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL to be at a high potential, wherein when the locking signal OFF _ CTL is at the high potential, the booster circuit and/or other circuits stop working, and the effect of reducing static power consumption is achieved. In the present embodiment, the other circuits are eight-function circuits and the like.

The utility model discloses an in the embodiment, after the locking is boost circuit stop work promptly, if power-on reset module is power-on again or switch button K meets the low potential once more, timing circuit module and locking circuit module reset and unblock respectively to realize free timing shutoff and unblock function.

In summary, the working principle of the solar light-controlled boost LED functional circuit is as follows:

when the BAT voltage of the power supply battery rises gradually, the inductance L enables the LX voltage to rise gradually, the vdd voltage is high along with the LX voltage, and when the BAT voltage of the power supply battery rises gradually

At this time, the PMOS transistor MP1 is turned on, and the vdd voltage rises accordingly, and rises corresponding to the vdd voltage

At this time MP1 is off and MN1 is on. When MN1 is turned on, the battery BAT charges the input capacitor Cin, and when MN1 turns off MP1 and turns on, Cin discharges and charges the output capacitor Cout, and when MP1 turns off MN1 again and turns on, Cout discharges to maintain the vdd voltage.

After the circuit normally works, when the switch key K is pressed for a long time to reach the required OFF time T1, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL to be at a high level, and the locking signal OFF _ CTL stops the operation of the booster circuit and/or other circuits through the Driver (as shown in fig. 11).

What has just been said is the preferred embodiment of the present invention, the embodiment is not used for limiting the patent protection scope of the present invention, therefore all the equivalent structural changes made by the contents of the description and the drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar light-control boosting LED functional circuit comprises an internal circuit and a peripheral circuit, wherein the peripheral circuit comprises an inductor L, a switch key K, a solar panel solar, an input capacitor Cin, an output end vdd of a power supply battery BAT, an output capacitor Cout, and output ends L1 and L2 of an eight-functional circuit, and the internal circuit comprises a boosting circuit, a solar charging control circuit and an eight-functional circuit; the boost circuit and the solar charging control circuit cooperatively control the charging process of the power supply battery BAT, and the output ends L1 and L2 of the eight-function circuit control the functional effect of the load LED; the eight-function circuit is characterized in that the internal circuit further comprises a long press turn-off module, a pull-up resistor is arranged inside the switch Key K, and when the output ends L1 and L2 of the eight-function circuit output the function effect of the LED, the Key point of the switch Key K is high; the long-press turn-off module controls the eight-function circuit to provide a MODE8 switching signal and/or turn off the booster circuit according to the Key point of the switch Key K as the low time.

2. The solar light-controlled boost LED functional circuit according to claim 1, wherein when the switch key K is pressed for a short time, the long-press turn-off module controls the output terminals L1 and L2 of the eight-function circuit to control the switching of the functional effect of the load LED, and when the switch key K is pressed for a long time, the long-press turn-off module controls the output terminals L1 and L2 of the eight-function circuit and the turn-off of the boost circuit, wherein the time of the short press is less than T1, and the time of the long press is greater than or equal to T1.

3. The solar light-controlled boost LED functional circuit according to claim 1 or 2, wherein the long press turn-off module comprises:

when the switch key K is connected with a low potential, the timing circuit module starts to work, when the time T1 required to be turned OFF is reached, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL to be a high potential, and if the time T1 required is not reached, the timing circuit module and the unlocking circuit module cooperatively control the locking signal OFF _ CTL not to change; wherein, when the lock signal OFF _ CTL is high potential, the booster circuit stops working.

4. The solar light-controlled boost LED functional circuit according to claim 3, wherein the long press shut-off module further comprises a jitter prevention circuit module for preventing interference pulses less than or equal to T2, wherein T1 is greater than T2.

5. The solar light-controlled boost LED functional circuit according to claim 4, wherein the anti-jitter circuit module is a DFF trigger.

6. The solar light-controlled boost LED functional circuit according to claim 3, wherein the solar charging control circuit comprises a resistor R1, a resistor R2, a resistor R3, an amplifier and an NMOS transistor MP 4; the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series between a battery BAT and a ground terminal, the negative end of the amplifier is connected with the connecting end of the resistor R1 and the resistor R2, the positive end of the amplifier is connected with a solar panel pin, the grid of the NMOS tube MP0 is connected with the output end EN1 of the amplifier, the drain of the NMOS tube MP0 is connected with the connecting end of the resistor R2 and the resistor R3, and the source of the NMOS tube MP0 is grounded.

7. The solar photo-controlled boost LED functional circuit as claimed in claim 6, wherein the pin LX of the boost circuit is connected to the drain of NMOS transistor MN1 and PMOS transistor MP1, the source of NMOS transistor MN1 is grounded, the gate is connected to one end of Driver, the gate of PMOS transistor MP1 is connected to one end of Driver, the other end of Driver is connected to one end of PFM controller, the other end of Driver is connected to the other end of lock signal OFF _ CTL, the other two ends of PFM controller are respectively connected to enable signal EN1 and the output end of comparator comp, the positive input end of comparator comp is connected to the connection end of resistor R7 and resistor R8, the negative input end of comparator comp is connected to the output end Vref of BG & Bias module, and the resistors R6, R7 and R8 are sequentially connected between the series power supply vdd and the ground.

8. The solar light-controlled boost LED functional circuit according to claim 3, wherein when the boost circuit stops working, if the power-on reset module is powered on again or the switch key K is connected to a low potential again, the timing circuit module and the locking circuit module are reset and unlocked respectively.

9. The solar light-controlled boost LED functional circuit according to claim 7, wherein the PFM controller further comprises a PWM controller.

10. The solar light-controlled boost LED functional circuit according to claim 9, wherein the load LED is a single color LED string or an LED string composed of LEDs of multiple colors.