A touch switch lawn lamp control chip

Abstract

A touch switch lawn lamp control chip includes a charging control and light control unlocking module, a touch switch, a touch button module, a power-on locking circuit module and a driving circuit module; the peripheral circuit includes a load, a battery and a solar panel; the touch button module receives a signal input from a port TOUCH, and outputs a first unlocking signal to the power-on locking circuit module and the driving circuit module; the charging control and light control unlocking module outputs a signal Unlock to the power-on locking circuit module according to the voltage difference between the port SOL and the port BAT, and the power-on locking circuit module outputs a second unlocking signal according to the first unlocking signal and the signal Unlock; the driving module controls the opening and closing of the load LED according to the first unlocking signal and / or the second unlocking signal. Therefore, the present invention can turn on the load LED lamp when needed, and avoid the problem of LED suddenly lighting up due to external interference during transportation.

Description

Technical Field

[0001] The invention belongs to the technical field of lighting circuits and relates to a touch switch lawn lamp control chip. Background Art

[0002] With the development of the economy, solar energy, a renewable resource that is abundant, free to use, does not require transportation, and does not pollute the environment, is becoming more and more popular, especially in outdoor lighting such as parks, squares, and outdoor advertising lights. There are more and more ways to use solar energy to supplement energy and control it, which can make full use of the current sustainable energy, while also greatly saving the consumption of traditional energy and reducing pollution emissions.

[0003] During the day, the solar panel uses solar energy to charge the battery. When charging stops at night, the battery starts to discharge to maintain the lighting of the LED. In actual use, after the solar panel receives light, when it detects that its voltage is greater than the internal setting voltage, it enters the light control state by default, and then turns off the LED output and only performs charging applications; when the solar panel no longer receives light, as its voltage is less than the internal setting voltage, the power supply starts to supply power and the LED output turns on.

[0004] When using solar LED lighting applications, customers often prefer to use products that do not light up when powered on, due to transportation and long-term storage characteristics, which can save power consumption to the greatest extent. However, this also requires the provision of a corresponding unlocking mode, especially in applications without switch control.

[0005] There are two unlocking methods commonly used in the prior art. One is to unlock the battery by connecting a switch button in series at the battery output port (BAT port) when a switch is used; the other is to unlock the solar application chip by detecting that the CDS pin is greater than the internal set voltage when no switch is used.

[0006] However, both of the above two applications have a problem. When the LED is turned off at night, it will be triggered by a light source such as a car light or a flashlight, and then the LED will be turned on. In addition, when the above two unlocking methods are used, the charging circuit cannot work. Therefore, the industry is in urgent need of a touch switch lawn lamp control chip that can turn on the load LED lamp when needed. Summary of the invention

[0007] In order to solve the above technical problems, the present invention proposes a touch switch lawn lamp control chip, and its technical solution is as follows:

[0008] A touch switch lawn lamp control chip, comprising an internal circuit and a peripheral circuit; the internal circuit comprises a charging control and light control unlocking module, a touch switch, a touch button module, a power-on locking circuit module and a driving circuit module; the peripheral circuit comprises a load, a battery and a solar panel; the charging control and light control unlocking module is connected between a port SOL and a port BAT, and when the battery discharges the load, the charging control and light control unlocking module outputs a signal Unlock to the power-on locking circuit module to unlock; the battery is connected between the port BAT and the ground terminal; the touch switch is connected to the port TOUC H and the ground terminal; the solar panel is connected between the port SOL and the ground terminal; the touch button module receives the signal input from the port TOUCH, and outputs a first unlocking signal to the power-on locking circuit module and the driving circuit module; the charging control and light-controlled unlocking module outputs a signal Unlock to the power-on locking circuit module according to the voltage difference between the port SOL and the port BAT, and the power-on locking circuit module outputs a second unlocking signal according to the first unlocking signal and the signal Unlock; the driving module controls the opening and closing of the load according to the first unlocking signal and / or the second unlocking signal.

[0009] Furthermore, the charging control and light-controlled unlocking module includes a comparator and a P transistor, the negative input terminal of the comparator is connected to the port SOL, the positive input terminal of the comparator is connected to the port BAT, the output terminal of the comparator is connected to the gate of the P transistor, the gate source of the P transistor is connected to the port SOL, and the drain is connected to the port BAT; when SOL>BAT, the output terminal of the comparator outputs the signal Unlock level is low, the P transistor is turned on, and the solar panel charges the battery; when SOL<BAT, the signal Unlock level is high, the P transistor is turned off, the solar panel stops charging the battery, and the battery discharges the load.

[0010] Furthermore, the touch button module includes a first trigger, a second trigger and a third trigger connected in sequence, and the reset ends Reset of the first trigger, the second trigger and the third trigger are connected together to receive the trigger information Key sent by the touch switch; the CLK terminal of the first trigger is connected to the clock pulse signal; when the duration of the trigger information Key reaches a certain threshold, the second trigger generates a trigger signal Key0 to send to the power-on locking circuit module, and sorts according to the number of times the trigger signal Key0 is sent, and sends the start and close control signal Key1 to the driving circuit module through the third trigger; wherein, the first unlocking signal includes the trigger signal Key0 and the start and close control signal Key1.

[0011] Furthermore, the power-on locking circuit module includes an inverter, an AND logic gate and a fourth trigger; the inverter outputs an inverse signal of the signal Unlock, the AND logic gate receives the trigger information Key issued by the touch button module and the signal Unlock output by the charging control and light control unlocking module to output a start signal, the reset end Reset of the fourth trigger receives the start signal, the CLK end of the fourth trigger receives the trigger signal Key0, and outputs a second unlock signal.

[0012] It can be seen from the above technical scheme that the touch switch lawn lamp control chip of the present invention is applied to a touch switch lawn lamp system and can also work in a charging circuit, and after it is powered on and locked, the chip can ensure extremely low power consumption, thereby ensuring long-term storage; in addition, it can turn on the LED at any time during use through the unlocking function and the button function to ensure that the LED will not suddenly light up due to external interference during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure shows the functional block diagram of the touch switch lawn lamp control chip in the embodiment of the present invention.

[0014] Figure 2 The circuit diagram of the charging control and light-controlled unlocking function module in the embodiment of the present invention is shown as follows

[0015] Figure 3 The circuit diagram of the light touch key function module in the embodiment of the present invention is shown as follows

[0016] Figure 4 The waveform diagram of the light touch key function module in the embodiment of the present invention is shown as follows:

[0017] Figure 5 The circuit diagram of the power-on locking module in the embodiment of the present invention is shown as follows

[0018] Figure 6 The waveform diagram of the power-on lock and unlock module in the embodiment of the present invention is shown as follows: DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-6 , the specific implementation modes of the present invention are further described in detail.

[0020] Please see attached Figure 1 , Figure 1 The figure shows the functional block diagram of the touch switch lawn lamp control chip in the embodiment of the present invention. Figure 1As shown, the control chip includes an internal circuit and a peripheral circuit; the internal circuit includes a charging control and light-controlled unlocking module, a touch switch, a touch button module, a power-on locking circuit module and a driving circuit module; the peripheral circuit includes a load, a battery and a solar panel; the charging control and light-controlled unlocking module is connected between the port SOL and the port BAT, and when the battery discharges the load, the charging control and light-controlled unlocking module outputs a signal Unlock to the power-on locking circuit module to unlock; the battery is connected between the port BAT and the ground terminal; the touch switch is connected between the port TOUCH and the ground terminal; the solar panel is connected between the port SOL and the ground terminal.

[0021] The touch button module receives the signal input from the port TOUCH, and outputs a first unlocking signal to the power-on locking circuit module and the driving circuit module; the charging control and light-controlled unlocking module outputs a signal Unlock to the power-on locking circuit module according to the voltage difference between the port SOL and the port BAT, and the power-on locking circuit module outputs a second unlocking signal according to the first unlocking signal and the signal Unlock; the driving module controls the opening and closing of the load according to the first unlocking signal and / or the second unlocking signal.

[0022] See also Figure 2 , Figure 2 FIG. 1 is a circuit diagram of a charging control and light-controlled unlocking function module in an embodiment of the present invention. Figure 2 As shown, the charging control and light-controlled unlocking module includes a comparator and a P transistor, the negative input terminal of the comparator is connected to the port SOL, the positive input terminal of the comparator is connected to the port BAT, the output terminal of the comparator is connected to the gate of the P transistor, the gate source of the P transistor is connected to the port SOL, and the drain is connected to the port BAT; by detecting the SOL and BAT voltages, it can be determined whether the solar panel is in a charging or discharging state for the battery.

[0023] The charging control and light-controlled unlocking module includes a comparator and a P transistor, the negative input terminal of the comparator is connected to the port SOL, the positive input terminal of the comparator is connected to the port BAT, the output terminal of the comparator is connected to the gate of the P transistor, the gate source of the P transistor is connected to the port SOL, and the drain is connected to the port BAT; when SOL>BAT, the output terminal of the comparator outputs the signal Unlock with a low level, the P transistor is turned on, and the solar panel charges the battery; when SOL<BAT, the signal Unlock level is high, the P transistor is turned off, the solar panel stops charging the battery, and the battery discharges the load.

[0024] See also Figure 3 , Figure 3FIG. 1 is a circuit diagram of a light touch key function module in an embodiment of the present invention. Figure 3 As shown, the touch button function module includes a first trigger, a second trigger and a third trigger connected in sequence; the reset ends Reset of the first trigger, the second trigger and the third trigger are connected together to receive the trigger information Key sent by the touch switch; the CLK end of the first trigger is connected to the clock pulse signal.

[0025] When the duration of the trigger information Key reaches a certain threshold, the second trigger generates a trigger signal Key0 to be sent to the power-on locking circuit module, and according to the number of times the trigger signal Key0 is sent, the start and close control signal Key1 is sent to the driving circuit module through the third trigger; wherein, the first unlocking signal includes the trigger signal Key0 and the start and close control signal Key1.

[0026] Among them, when the external Key key is not pressed, there is a functional pull-up effect inside the control chip, and a fixed oscillation signal is generated inside. The D trigger detects the start time of the trigger information Key being a low level and whether the duration of the trigger information Key reaches a certain threshold, thereby playing an anti-shake role of the key to avoid false triggering problems caused by interference signals.

[0027] That is to say, if the duration of the trigger information Key is very short and does not meet the set internal time threshold, the trigger information Key is a false trigger and an invalid press. At this time, the second trigger will not generate a trigger signal Key0; otherwise, the second trigger generates a trigger signal Key0, and the button function is switched by default.

[0028] Please combine Figure 3 See also Figure 4 , Figure 4 FIG. 1 is a waveform diagram of a light touch key function module in an embodiment of the present invention. Figure 4 As shown, from top to bottom, it includes the trigger information Key waveform, the clock pulse CLK waveform, the trigger signal Key0 waveform and the opening and closing control signal Key1 waveform.

[0029] When the Key key function is not started (OFF state), the trigger information Key waveform is high level, and when the Key key function is started or falsely triggered (ON state), the trigger information Key waveform is low level. At this time, there are two states: when the Key key low level time is less than the clock pulse signal CLK cycle, it means that the Key key has not performed any operation. Only when the Key key low level time exceeds the clock pulse signal CLK cycle, the Key key has performed a key operation.

[0030] from Figure 3It can be seen that the trigger information Key has three low levels. The duration of the first low level is shorter, almost the same as one cycle of the clock pulse CLK waveform. Assuming that the threshold is greater than or equal to 2 pulse signals, the first low level is an erroneous operation or jitter, and the second and third low levels are valid Key button trigger signals, that is, the trigger signal Key0 and the opening and closing control signal Key1 can be output.

[0031] See also Figure 5 , Figure 5 FIG. 1 is a circuit diagram of a power-on locking module in an embodiment of the present invention. Figure 5 As shown, the power-on locking circuit module includes an inverter, an AND logic gate and a fourth trigger; the inverter outputs an inverse signal of the signal Unlock, the AND logic gate receives the trigger information Key sent by the light touch button module and the signal Unlock output by the charging control and light control unlocking module to output a start signal, the reset end Reset of the fourth trigger receives the start signal, the CLK end of the fourth trigger receives the trigger signal Key0, and outputs a second unlock signal.

[0032] Specifically, when the initial signal when Key0 is powered on is detected, the output signal OFF can be latched as a high level through the latch formed by the fourth D flip-flop. When the Key key signal or the light-controlled Unlock signal is encountered again, the OFF signal can be unlocked, thereby achieving power-on locking and realizing the functions of key and light-controlled unlocking.

[0033] See also Figure 6 , Figure 6 FIG. 1 is a waveform diagram of the power-on locking and unlocking module in an embodiment of the present invention. Figure 6 As shown in the figure, after power-on, the output OFF state is always at a high level, and it is unlocked only when the Unlock switch is on or the Key is operated again.

[0034] In summary, by adopting the solution of the present invention, lawn lamp control applications can be realized by externally connecting NMOS tubes, LED lamps and power supplies.

[0035] The above-described embodiments are only preferred embodiments of the present invention, and the embodiments are not intended to limit the patent protection scope of the present invention. Therefore, any equivalent structural changes made using the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A touch switch lawn lamp control chip, characterized in that: It includes an internal circuit and a peripheral circuit; the internal circuit includes a charging control and light-controlled unlocking module, a touch switch, a touch button module, a power-on locking circuit module and a driving circuit module; the peripheral circuit includes a load, a battery and a solar panel; the charging control and light-controlled unlocking module is connected between the port SOL and the port BAT, and when the battery discharges the load, the charging control and light-controlled unlocking module outputs a signal Unlock to the power-on locking circuit module to unlock; the battery is connected between the port BAT and the ground terminal; the touch switch is connected between the port TOUCH and the ground terminal; the solar panel is connected between the port SOL and the ground terminal; The touch button module receives the signal input from the port TOUCH, and outputs a first unlocking signal to the power-on locking circuit module and the driving circuit module; the charging control and light-controlled unlocking module outputs a signal Unlock to the power-on locking circuit module according to the voltage difference between the port SOL and the port BAT, and the power-on locking circuit module outputs a second unlocking signal according to the first unlocking signal and the signal Unlock; the driving circuit module controls the opening and closing of the load according to the first unlocking signal and / or the second unlocking signal; The touch key module comprises a first trigger, a second trigger and a third trigger connected in sequence, wherein the reset terminals Reset of the first trigger, the second trigger and the third trigger are connected together to receive the trigger information Key sent by the touch switch; the CLK terminal of the first trigger is connected to a clock pulse signal; When the duration of the trigger information Key reaches a certain threshold, the second trigger generates a trigger signal Key0 to send to the power-on locking circuit module, and sends an opening and closing control signal Key1 to the driving circuit module through the third trigger according to the number of times the trigger signal Key0 is sent; wherein the first unlocking signal includes the trigger signal Key0 and the opening and closing control signal Key1; The power-on locking circuit module includes an inverter, an AND logic gate and a fourth trigger; the inverter outputs an inverse signal of the signal Unlock, the AND logic gate receives the trigger information Key issued by the light touch button module and the signal Unlock output by the charging control and light control unlocking module to output a start signal, the reset end Reset of the fourth trigger receives the start signal, the CLK end of the fourth trigger receives the trigger signal Key0, and outputs a second unlock signal.

2. The touch switch lawn lamp control chip according to claim 1, characterized in that: The charging control and light-controlled unlocking module includes a comparator and a P transistor, the negative input terminal of the comparator is connected to the port SOL, the positive input terminal of the comparator is connected to the port BAT, the output terminal of the comparator is connected to the gate of the P transistor, the gate source of the P transistor is connected to the port SOL, and the drain is connected to the port BAT; when SOL>BAT, the output terminal of the comparator outputs the signal Unlock with a low level, the P transistor is turned on, and the solar panel charges the battery; when SOL<BAT, the signal Unlock level is high, the P transistor is turned off, the solar panel stops charging the battery, and the battery discharges the load.

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