Energy-saving power supply circuit, circuit board and wire controller

Abstract

The present application provides an energy-saving power supply circuit, a circuit board and a wire controller, which relate to the technical field of electronic circuits, and solve the problem that the wire controller of the related technology has high energy consumption and causes the battery power to be consumed too quickly. The circuit of the present solution can trigger the enabling control of the boost module by detecting whether the user touches the relevant button, thereby enabling the boost module after the user touches the button, so that the boost module provides the operating voltage for the MCU module, and then switches the circuit from the standby state to the working state, that is, it can wake up the wire controller when the user touches the relevant button, so that the wire controller can reduce energy consumption to slow down the loss rate of the battery power, and there is no need for the user to frequently replace the battery, which effectively extends the battery life of the wire controller and helps to improve the user experience of the wire controller.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to an energy-saving power supply circuit, a circuit board and a wire controller. Background Art

[0002] Multi-split air conditioning systems and heat pump systems on the market are generally controlled by remote controllers or wired controllers, of which the most commonly used is the wired controller. Common power supply methods for wired controllers include main control power supply and battery power supply, and battery-powered wired controllers are currently the mainstream products.

[0003] For a battery-powered wire controller, its battery life depends on the battery power. However, in the related art, the battery-powered wire controller has a high energy consumption, which causes the battery power to be depleted too quickly. The battery life of the wire controller is short, and the user needs to frequently replace the battery, which affects the user experience of the wire controller. Utility Model Content

[0004] The present application provides an energy-saving power supply circuit, a circuit board and a wire controller, which solves the problem that the wire controller in the related art has high energy consumption and causes the battery power to be depleted too quickly, so that the wire controller can reduce energy consumption to slow down the rate of battery power loss, which helps to improve the user experience of the wire controller.

[0005] In a first aspect, the present application provides an energy-saving power supply circuit, which includes a battery power supply module, a boost module, an enable control module, an MCU module and a touch detection module.

[0006] The battery power supply module is used to provide voltage for the circuit; the input end of the boost module is connected to the output end of the battery power supply module, and the boost module is used to boost the output voltage of the battery power supply module according to the enable control signal received by the enable end of the boost module to switch from the standby state to the working state;

[0007] The input end of the enable control module is connected to the output end of the battery power supply module, the output end of the enable control module is connected to the enable end of the boost module, and the enable control module is used to output an enable control signal to the enable end of the boost module according to the received control signal;

[0008] The power supply end of the MCU module is connected to the output end of the boost module, the control signal output end of the MCU module is connected to the first control end of the enable control module, and the MCU module is used to control the control signal output end of the MCU module to output a control signal according to the key touch signal received by the key detection end of the MCU module;

[0009] The first signal output end and the second signal output end of the touch detection module respectively correspond to multiple key detection ends connected to the MCU module, and the first signal output end of the touch detection module is also connected to the second control end of the enable control module. The touch detection module is used to output a control signal to the enable control module or output a key touch signal to the key detection end of the MCU module according to the received key pressing signal.

[0010] In some embodiments, the boost module includes a boost chip, an input inductor, a first diode, a first electrolytic capacitor, an input filter capacitor, a second electrolytic capacitor, an output filter capacitor, an output resistor, and a feedback unit;

[0011] The input pin of the boost chip is connected to the positive terminal of the first electrolytic capacitor, the negative terminal of the first electrolytic capacitor is grounded, and the input filter capacitor is connected in parallel with the first electrolytic capacitor;

[0012] The input pin of the boost chip is also connected to the first end of the input inductor, the second end of the input inductor is connected to the switch pin of the boost chip, the anode end of the first diode is connected to the second end of the input inductor, and the cathode end of the first diode is connected to the output pin of the boost chip;

[0013] The output pin of the boost chip is also connected to the positive terminal of the second electrolytic capacitor, the negative terminal of the second electrolytic capacitor is grounded, and the output filter capacitor and the output resistor are both connected in parallel with the second electrolytic capacitor;

[0014] The input end of the feedback unit is connected to the output pin of the boost chip, and the feedback output end of the feedback unit is connected to the feedback pin of the boost chip.

[0015] In some embodiments, the feedback unit includes a first voltage-dividing resistor, a second voltage-dividing resistor, and a feedback capacitor;

[0016] The first end of the first voltage-dividing resistor is connected to the output pin of the boost chip, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor, the second end of the second voltage-dividing resistor is grounded, the feedback capacitor is connected in parallel with the second voltage-dividing resistor, and the first end of the second voltage-dividing resistor serves as the feedback output end of the feedback unit and is connected to the feedback pin of the boost chip.

[0017] In some embodiments, the enabling control module includes a PNP transistor, a third voltage-dividing resistor, a first signal access unit, and a second signal access unit;

[0018] The emitter terminal of the PNP transistor is connected to the output terminal of the battery power supply module, the collector terminal of the PNP transistor is connected to the enable terminal of the boost module, and the base terminal of the PNP transistor is connected to the signal output terminal of the first signal access unit and the signal output terminal of the second signal access unit;

[0019] A first end of the third voltage-dividing resistor is connected to an emitter end of the PNP transistor, and a second end of the third voltage-dividing resistor is connected to a base end of the PNP transistor;

[0020] The signal access end of the first signal access unit is connected to the first signal output end of the touch detection module, and the signal access end of the second signal access unit is connected to the control signal output end of the MCU module.

[0021] In some embodiments, the first signal access unit includes a first current limiting resistor and a second diode, the first end of the first current limiting resistor is connected to the base end of the PNP transistor, the second end of the first current limiting resistor is connected to the anode end of the second diode, and the cathode end of the second diode is connected to the first signal output end of the touch detection module.

[0022] In some embodiments, the second signal access unit includes a second current limiting resistor, a third diode and a first filter capacitor, the first end of the second current limiting resistor is connected to the base end of the PNP transistor, the second end of the second current limiting resistor is connected to the anode end of the third diode, the first filter capacitor is connected in parallel with the second current limiting resistor, and the cathode end of the third diode is connected to the control signal output end of the MCU module.

[0023] In some embodiments, the circuit also includes a voltage sampling module, the input end of the voltage sampling module is connected to the output end of the battery power module, the sampling output end of the voltage sampling module is connected to the voltage detection end of the MCU module, and the voltage sampling module is used to feed back the output voltage of the battery power module to the MCU module.

[0024] In some embodiments, the voltage sampling module includes a first sampling resistor, a second sampling resistor and a second filter capacitor, the first end of the first sampling resistor is connected to the output end of the battery power module, the second end of the first sampling resistor is connected to the first end of the second sampling resistor, and the first end of the second sampling resistor serves as the sampling output end of the voltage sampling module and is connected to the voltage detection end of the MCU module, the second end of the second sampling resistor is grounded, and the second filter capacitor is connected in parallel with the second sampling resistor.

[0025] In a second aspect, the present application also provides a circuit board, which includes the above-mentioned energy-saving power supply circuit.

[0026] In a third aspect, the present application also provides a wire controller, which includes the above-mentioned circuit board.

[0027] The circuit of the present application can trigger the enabling control of the boost module by detecting whether the user touches the relevant button, so that after the user touches the button, the wire controller enables the boost module, so that the boost module provides the operating voltage for the MCU module, and then switches the circuit from the standby state to the working state, that is, wakes up the wire controller when the user touches the relevant button, so that the wire controller can reduce energy consumption to slow down the loss of battery power. There is no need for the user to frequently replace the battery, which effectively extends the battery life of the wire controller and helps to improve the user experience of the wire controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A principle block diagram of an energy-saving power supply circuit provided in one embodiment of the present application;

[0029] Figure 2 A schematic diagram of the circuit structure of a boost module provided in one embodiment of the present application;

[0030] Figure 3 A schematic diagram of the circuit structure of an enabling control module provided in one embodiment of the present application;

[0031] Figure 4 A schematic diagram of the circuit structure of an energy-saving power supply circuit provided in one embodiment of the present application. DETAILED DESCRIPTION

[0032] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, rather than to limit the embodiments of the present application. It should also be noted that, for ease of description, only the parts related to the embodiments of the present application rather than all structures are shown in the accompanying drawings, and those skilled in the art should be able to think of it after reading the specification of this application that as long as the technical features do not contradict each other, any combination of the technical features can constitute an optional implementation method.

[0033] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship. In the description of the present application, "multiple" means two or more, and "several" means one or more.

[0034] The wire controller has physical buttons and a display screen for users to operate the wire controller and display relevant information to users (such as the current temperature, the adjusted mode, etc.). Of course, some wire controllers can also use touch screens and physical buttons so that users can control the wire controller by touch. In battery-powered wire controllers, the battery life depends on the battery power, and the wire controller needs to consume more power to maintain the display content on the display screen, resulting in excessive battery power loss and the voltage provided by the battery cannot meet the working voltage of the wire controller. That is, the battery life of the wire controller is short, so users need to frequently replace the battery, and the user experience is not good.

[0035] In this regard, the present application provides an energy-saving power supply circuit, which can be used in a wire controller. The wire controller switches from a standby state to a working state by responding to a user's touch operation or a button press operation, and when the battery voltage is low, the wire controller can raise the voltage to the working voltage, thereby extending the battery life of the wire controller.

[0036] like Figure 1 As shown, Figure 1 This is a principle block diagram of an energy-saving power supply circuit provided in an embodiment of the present application. The energy-saving power supply circuit includes a battery power supply module 110, a boost module 120, an enable control module 130, an MCU module 140 and a touch detection module 150.

[0037] Among them, the battery power module 110 is used to provide voltage for the circuit, that is, multiple batteries, such as two batteries, four batteries, etc., are connected to the battery power module 110 to provide voltage for the circuit. The input end of the boost module 120 is connected to the output end of the battery power module 110, the output end of the boost module 120 is connected to the power supply end of the MCU module 140, and the enable end of the boost module 120 is connected to the output end of the enable control module 130. It can be understood that the boost module 120 boosts the voltage according to the signal received by its enable end, that is, when the enable end of the boost module 120 receives the enable control signal, the boost module 120 boosts the output voltage of the battery power module 110 so that the wire controller can switch from the standby state to the working state.

[0038] In addition, the input end of the enable control module 130 is connected to the output end of the battery power module 110, and the output end of the enable control module 130 is connected to the enable end of the boost module 120. The enable control module 130 has a first control end and a second control end, wherein the first control end of the enable control module 130 is connected to the control signal output end of the MCU module 140. It can be imagined that the MCU module 140 can output a control signal by controlling the control signal output end thereon, thereby controlling the enable control module 130 to output an enable control signal to the boost module 120.

[0039] When the touch detection module 150 detects the user's touch operation on the button of the wire controller or the touch display screen, the touch detection module 150 can receive the button pressing signal, and then output the button touch signal through the first signal output terminal and the second signal output terminal thereon. For example, the first signal output terminal and the second signal output terminal of the touch detection module 150 are respectively connected to the multiple button detection terminals of the MCU module 140, that is, when there are multiple first signal output terminals of the touch detection module 150 and / or the second signal output terminal of the touch detection module 150, they are respectively connected to the multiple button detection terminals of the MCU module 140 in a one-to-one correspondence.

[0040] The first signal output terminal of the touch detection module 150 is also connected to the second control terminal of the enable control signal, and the touch detection module 150 can output a control signal to the enable control module 130 or output a key touch signal to the key detection terminal of the MCU module 140 according to the received key pressing signal. For the MCU module 140, the MCU module 140 can control the control signal output terminal of the MCU module 140 to output a control signal according to the key touch signal received by the key detection terminal of the MCU module 140.

[0041] Exemplarily, the first signal output terminal of the touch detection module 150 is associated with the switch button of the wire controller, that is, when the touch detection module 150 detects that the switch button is touched, the first signal output terminal of the touch detection module 150 outputs a key touch signal. In this regard, when the touch detection module 150 receives a key pressing signal corresponding to the switch button, the first signal output terminal of the touch detection module 150 can output a control signal so that the enable control module 130 outputs an enable control signal to the enable terminal of the boost module 120.

[0042] There may be multiple second signal output terminals of the touch detection module 150, and the second signal output terminals of the touch detection module 150 are respectively associated with other different buttons on the wire controller, such as a mode selection button, an adjustment button, etc. That is, when the touch detection module 150 detects a corresponding button, the second signal output terminal of the touch detection module 150 associated with the button may output a button touch signal to the MCU module 140, so that the MCU module 140 outputs a control signal to the enable control module 130 through the control signal output terminal thereon, and then the enable control module 130 feeds back the enable control signal to the enable terminal of the boost module 120, so that the boost module 120 can boost the voltage, and then raise the voltage to the working voltage, so that the wire controller switches from the standby state to the working state.

[0043] It can be seen from the above scheme that the energy-saving power supply circuit can trigger the enabling control of the boost module by detecting whether the user touches the relevant button, so that after the user touches the button, the boost module is enabled, so that the boost module provides the working voltage for the MCU module, and then switches the circuit from the standby state to the working state, that is, wakes up the wire controller when the user touches the relevant button, so that the wire controller can reduce energy consumption to slow down the loss rate of battery power. It can be imagined that the boost module can also raise the voltage to the working voltage of the wire controller when the battery voltage is low, that is, compared with the solution of the related technology, the battery voltage can be reduced more, thereby extending the battery life and making the wire controller have a longer battery life. Therefore, users do not need to replace batteries frequently. This solution effectively extends the battery life of the wire controller and helps to improve the user experience of the wire controller.

[0044] In some embodiments, the boost module includes a boost chip, an input inductor, a first diode, a first electrolytic capacitor, an input filter capacitor, a second electrolytic capacitor, an output filter capacitor, an output resistor, and a feedback unit. The boost chip can be a boost chip, the input pin of the boost chip is connected to the positive terminal of the first electrolytic capacitor, the negative terminal of the first electrolytic capacitor is grounded, and the input filter capacitor is connected in parallel with the first electrolytic capacitor, that is, the first electrolytic capacitor and the input filter capacitor connected in parallel are connected at the input pin of the boost chip, and the first electrolytic capacitor and the input filter capacitor play the role of input filtering for the boost chip.

[0045] In addition, the input pin of the boost chip is also connected to the first end of the input inductor, the second end of the input inductor is connected to the switch pin of the boost chip, the anode end of the first diode is connected to the second end of the input inductor, and the cathode end of the first diode is connected to the output pin of the boost chip. It can be understood that the input inductor can store energy and increase voltage in the boost module, and the first diode can prevent the voltage of the output pin of the boost chip from flowing back to the input pin of the boost chip.

[0046] The output pin of the boost chip is also connected to the positive terminal of the second electrolytic capacitor, the negative terminal of the second electrolytic capacitor is grounded, and the output filter capacitor and the output resistor are connected in parallel with the second electrolytic capacitor. That is, the second electrolytic capacitor, the output filter capacitor and the output resistor connected in parallel are connected at the output pin of the boost chip, and the second electrolytic capacitor and the output filter capacitor can play the role of output filtering for the boost chip.

[0047] The feedback unit is used to provide voltage to the feedback pin of the boost chip, and for this, the input end of the feedback unit is connected to the output pin of the boost chip, and the feedback output end of the feedback unit is connected to the feedback pin of the boost chip.

[0048] Figure 2This is a schematic diagram of the circuit structure of a boost module provided in an embodiment of the present application. The scheme can enable the boost chip by enabling the control terminal signal to boost the output voltage of the battery power module, thereby providing the circuit with a working voltage through the boost chip. Therefore, the circuit can take a lower value for the minimum voltage of the battery than the voltage value in the related art, thereby helping to increase the battery life that can be provided.

[0049] like Figure 2 As shown, in one embodiment, the feedback unit includes a first voltage-dividing resistor R1, a second voltage-dividing resistor R2 and a feedback capacitor Cf. Specifically, the first end of the first voltage-dividing resistor R1 is connected to the output pin Vout of the boost chip U1, the second end of the first voltage-dividing resistor R1 is connected to the first end of the second voltage-dividing resistor R2, the second end of the second voltage-dividing resistor R2 is grounded, the feedback capacitor Cf is connected in parallel with the second voltage-dividing resistor R2, and the first end of the second voltage-dividing resistor R2 serves as the feedback output end of the feedback unit and is connected to the feedback pin FB of the boost chip U1.

[0050] The input pin Vin of the boost chip U1 is connected to the positive terminal of the first electrolytic capacitor EC1, the negative terminal of the first electrolytic capacitor EC1 is grounded, and the input filter capacitor C1 is connected in parallel with the first electrolytic capacitor EC1. The output pin Vout of the boost chip U1 is connected to the positive terminal of the second electrolytic capacitor EC2, the negative terminal of the second electrolytic capacitor EC2 is grounded, the output filter capacitor C2 is connected in parallel with the second electrolytic capacitor EC2, and the output resistor Ro is also connected in parallel with the second electrolytic capacitor EC2.

[0051] The first end of the input inductor L1 is connected to the input pin Vin of the boost chip U1, the second end of the input inductor L1 is connected to the switch pin SW, the anode end of the first diode D1 is connected to the second end of the input inductor L1, and the cathode end of the first diode D1 is connected to the output pin Vout of the boost chip U1. In addition, the enable pin EN of the boost chip is used to connect to the output end of the enable control module, the enable pin EN of the boost chip is connected to a grounded filter capacitor C4, and the filter capacitor C4 is also connected in parallel with the voltage divider resistor R6 to filter the enable control signal connected to the enable pin.

[0052] It should be noted that, in some embodiments, the first voltage-dividing resistor and the second voltage-dividing resistor in the feedback unit are connected in series, and the first end of the first voltage-dividing resistor is connected to the output pin of the boost chip, while the second end of the second voltage-dividing resistor is connected to the grounded second voltage-dividing resistor. Of course, the first end of the second voltage-dividing resistor (the ungrounded end) is also connected to the feedback pin of the boost chip, and the feedback capacitor can be connected in parallel with the first voltage-dividing resistor, which is equivalent to the two ends of the feedback capacitor being respectively connected to the output pin and the feedback pin of the boost chip.

[0053] In some embodiments, the enabling control module includes a PNP transistor, a third voltage-dividing resistor, a first signal access unit, and a second signal access unit. The emitter terminal of the PNP transistor serves as the input terminal of the enabling control module, and the emitter terminal of the PNP transistor is connected to the output terminal of the battery power module; the collector terminal of the PNP transistor serves as the output terminal of the enabling control module, and the collector terminal of the PNP transistor is connected to the enabling terminal of the boost module; and a third voltage-dividing resistor is also provided between the emitter terminal and the collector terminal of the PNP transistor, that is, the first end of the third voltage-dividing resistor is connected to the emitter terminal of the PNP transistor, and the second end of the third voltage-dividing resistor is connected to the base terminal of the PNP transistor.

[0054] The base end of the PNP transistor is connected to the signal output end of the first signal access unit and the signal output end of the second signal access unit. The signal access end of the first signal access unit is connected to the control signal output end of the MCU module, and the signal access end of the second signal access unit is connected to the first signal output end of the touch detection module.

[0055] It can be understood that the signal access end of the first signal access unit serves as the first control end of the enable control module, and the signal access end of the second signal access unit serves as the second control end of the enable control module. Therefore, the enable control module can be controlled by the MCU module or the touch detection module, so that after the MCU module or the touch detection module outputs the control signal, the PNP transistor in the enable control module meets the conduction condition, thereby turning on and enabling the boost module, so that the voltage of the circuit is increased to the working voltage.

[0056] In one embodiment, the first signal access unit includes a first current limiting resistor and a second diode, the first end of the first current limiting resistor is connected to the base end of the PNP transistor, the second end of the first current limiting resistor is connected to the anode end of the second diode, and the cathode end of the second diode is connected to the control signal output end of the MCU module.

[0057] It can be understood that the second diode is unidirectionally conducted, and the anode end of the second diode is connected to the base end of the PNP transistor through the first current limiting resistor. When the cathode end of the second diode is connected to a low level, that is, when the control signal output from the control signal output end of the MCU module is at a low level, the second diode is turned on, and then the PNP transistor meets the conduction condition, so that the enable end of the boost module is enabled to a high level, and the boost module starts to work normally.

[0058] In one embodiment, the second signal access unit includes a second current limiting resistor, a third diode and a first filter capacitor, the first end of the second current limiting resistor is connected to the base end of the PNP transistor, the second end of the second current limiting resistor is connected to the anode end of the third diode, the first filter capacitor is connected in parallel with the second current limiting resistor, and the cathode end of the third diode is connected to the first signal output end of the touch detection module.

[0059] It can be understood that the third diode is unidirectionally conducted, and the anode end of the third diode is connected to the base end of the PNP transistor through the second current limiting resistor. When the cathode end of the third diode is connected to a low level, that is, when the control signal output by the first signal output end of the touch detection module is a low level, the third diode is turned on, and then the PNP transistor meets the conduction condition, so that the enable end of the boost module is enabled to a high level, and the boost module starts to work normally.

[0060] Figure 3 A circuit structure diagram of an enabling control module provided in one embodiment of the present application, wherein the enabling control module is connected to an MCU module via a first control terminal thereof and to a touch detection module via a second control terminal thereof, so as to enable a boost module according to a control signal output by the MCU module and / or the touch detection module, so that the boost module provides an operating voltage for the circuit.

[0061] As shown in the figure, the enabling control module includes a PNP transistor Q1, a third voltage-dividing resistor R3, a first current-limiting resistor R4, a second diode D2, a second current-limiting resistor R5, a third diode D3 and a first filter capacitor C3.

[0062] The emitter terminal of the PNP transistor Q1 is connected to the output terminal of the battery power module, and the emitter terminal of the PNP transistor Q1 is also connected to the base terminal of the PNP transistor Q1 through the third voltage-dividing resistor R3, and the collector terminal of the PNP transistor Q1 is connected to the enable terminal of the boost module.

[0063] In addition, the base terminal of the PNP transistor Q1 is also connected to the first end of the first current limiting resistor R4 and the second end of the second current limiting resistor R5, respectively. The second end of the first current limiting resistor R4 is connected to the anode end of the second diode D2, and the second end of the second current limiting resistor R5 is connected to the anode end of the third diode D3. The cathode end of the second diode D2 is connected to the control signal output end of the MCU module, and the cathode end of the third diode D3 is connected to the first signal output end of the touch detection module.

[0064] Therefore, when the cathode end of the second diode D2 or the cathode end of the third diode D3 is connected to a low level, the PNP transistor Q1 is turned on, thereby connecting the enable end of the boost module to a high level and boosting the voltage to the working voltage.

[0065] It should be noted that a PMOS tube can also be used to replace the PNP transistor in the enable control module, that is, the source end of the PMOS tube is connected to the output end of the battery power supply module, the drain end of the PMOS tube is connected to the enable end of the boost module, and the gate end of the PMOS tube is connected to the first current limiting resistor and the second current limiting resistor.

[0066] In some embodiments, the circuit also includes a voltage sampling module, the input end of the voltage sampling module is connected to the output end of the battery power module, and the sampling output end of the voltage sampling module is connected to the voltage detection end of the MCU module. It can be imagined that the voltage sampling module can sample the output voltage of the battery power module and then feed it back to the MCU module, that is, the voltage sampling module is used to feed back the output voltage of the battery power module to the MCU module.

[0067] After the MCU module obtains the output voltage fed back by the voltage sampling module, the MCU module can determine whether to control the control signal output terminal of the MCU module to output a control signal according to the received voltage signal. For example, when the output voltage is lower than 2.5V, the control signal output terminal of the MCU module provides an output control signal so that the enabling control module can enable the boost module, thereby providing the circuit with an operating voltage.

[0068] Specifically, as in one embodiment, the voltage sampling module includes a first sampling resistor, a second sampling resistor and a second filter capacitor, wherein the first sampling resistor and the second sampling resistor are connected in series, that is, the first end of the first sampling resistor is connected to the output end of the battery power supply module, the second end of the first sampling resistor is connected to the first end of the second sampling resistor, and the first end of the second sampling resistor serves as the sampling output end of the voltage sampling module and is connected to the voltage detection end of the MCU module, and the second end of the second sampling resistor is grounded; and the second filter capacitor is connected in parallel with the second sampling resistor.

[0069] It should be noted that, in some embodiments, the voltage sampling module may also use a voltage stabilizing diode and a resistor in series to feed back voltage to the MCU module.

[0070] Figure 4 A schematic diagram of the circuit structure of an energy-saving power supply circuit provided in an embodiment of the present application is shown in the figure. In the energy-saving power supply circuit, the battery power supply module is connected to the battery to provide input voltage for the circuit. The input pin Vin of the boost chip is connected to the positive terminal of the first electrolytic capacitor EC1, and the negative terminal of the first electrolytic capacitor EC1 is grounded, and the input filter capacitor C1 is connected in parallel with the first electrolytic capacitor EC1, so as to filter the input voltage at the input pin Vin of the boost chip U1.

[0071] An input inductor L1 is connected between the input pin Vin and the switch pin SW of the boost chip U1, and a first diode D1 is connected between the switch pin SW and the output pin Vout of the boost chip U1, wherein the anode end of the first diode D1 is connected to the switch pin SW of the boost chip U1, and the cathode end of the first diode D1 is connected to the output pin Vout of the boost chip U1. Moreover, the output pin Vout of the boost chip U1 is connected to the positive terminal of the second electrolytic capacitor EC2, the negative terminal of the second electrolytic capacitor EC2 is grounded, and the output filter capacitor C2 and the output resistor Ro are both connected in parallel with the second electrolytic capacitor EC2 to filter the output pin Vout of the boost chip U1.

[0072] The first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 are connected in series, wherein the first voltage-dividing resistor R1 is also connected to the output pin of the boost chip U1; the first end of the second voltage-dividing resistor R2 is not only connected to the first voltage-dividing resistor R1, but also connected to the feedback pin Fb of the boost chip U1, and the second end of the second voltage-dividing resistor R2 is grounded, and the feedback capacitor Cf is connected in parallel to the second voltage-dividing resistor R2.

[0073] A PNP transistor Q1 is provided at the enable pin EN of the boost chip U1. Specifically, the collector terminal of the PNP transistor is connected to the enable pin EN of the boost chip U1, the emitter terminal of the PNP transistor is connected to the input voltage provided by the battery, and a third voltage-dividing resistor R3 is connected between the emitter terminal and the base terminal of the PNP transistor.

[0074] The base end of the PNP transistor is connected to the output pin P1.4 (which serves as the control signal output end of the MCU module) of the main chip U3 in the MCU module through the first current limiting resistor R4 and the second diode D2. Specifically, the anode end of the second diode D2 is connected to one end of the first current limiting resistor R4, and the cathode end of the second diode D2 is connected to the output pin of the main chip U3.

[0075] The base end of the PNP transistor is also connected to the output pin Q1 of the touch chip in the touch detection module (the pin serves as the first signal output end of the touch detection module) through the second current limiting resistor R5, the third diode D3 and the first filter capacitor C3. Specifically, the anode end of the third diode D3 is connected to one end of the second current limiting resistor R4, the cathode end of the third diode D3 is connected to the input pin P1.5 of the main chip U3, and the first filter capacitor C3 is connected in parallel with the second current limiting resistor R5.

[0076] The buttons S1-S5 correspond to different buttons, and the pins K1-K5 of the touch chip U2 are connected to the buttons S1-S5 one by one through corresponding resistors. The output pins Q1-Q5 of the touch chip U2 are respectively associated with the buttons S1-S5, such as the output pin Q1 is associated with the button S1, the output pin Q2 is associated with the button S2, etc. The output pin Q1 of the touch chip U2 serves as the first signal output terminal of the touch detection module, and the touch detection module has multiple second signal output terminals, that is, the output pins Q2-Q5 of the touch chip U2 are all used as the second signal output terminals of the touch detection module.

[0077] In addition, the output pins Q1-Q5 of the touch chip U2 are connected to the input pins P1.5-P1.7 and the input pins P0.0-P0.1 of the main chip U3 through corresponding resistors. Among them, the input pins P1.5, P1.6, P1.7, P0.0 and P0.1 of the main chip U3 are used as the key detection terminals of the MCU module.

[0078] The circuit has two states: standby state and working state. In the standby state, the boost chip U1 is not working, and the enable pin EN of the boost chip U1 is pulled down to ground through the voltage divider resistor R6, that is, the enable pin EN of the boost chip U1 is connected to a low-level signal; in the working state, the boost chip U1 is working, and the enable pin of the boost chip U1 is connected to a high level.

[0079] It can be understood that when any of the buttons S1-S5 is touched, the touch chip U2 will output a button touch signal to the main chip U3 through the corresponding output pin to trigger the enablement of the boost module. For example, when the button S1 is touched, the touch chip U2 outputs a low-level signal through the output pin Q1 thereon, so that the third diode D3 is turned on, thereby turning on the PNP transistor Q1, and then enabling the boost chip U1, and the boost chip U1 performs boosting and outputs the working voltage through the output pin Vout thereon. At the same time, after the main chip U3 receives the low-level signal output by the output pin Q1 of the touch chip U2, the main chip U3 will output a low-level signal through the output pin P1.4 thereon to maintain the conduction of the PNP transistor Q1 and the output of the working voltage by the boost chip U1.

[0080] For another example, when the button S2 is touched, the touch chip U2 outputs a low-level signal through its output pin Q2, so that the input pin P1.6 of the main chip U3 receives the low level, and then the main chip U3 outputs a low-level signal through its output pin P1.4, so that the second diode D2 is turned on, and then the PNP transistor Q1 meets the conduction condition and enables the boost chip U1, and the boost chip U1 boosts the voltage and outputs the working voltage.

[0081] The present application also provides a circuit board, which includes an energy-saving power supply circuit as provided in the above embodiment, so that the wire controller can remain in standby mode before the user touches the button, and wake up the wire controller after the user touches the button to switch the wire controller from standby mode to working mode, so as to reduce the energy consumption of the wire controller, and then slow down the loss rate of battery power, thereby effectively extending the battery life of the wire controller and helping to improve the user experience of the wire controller.

[0082] The present application also provides a wire controller, which includes a circuit board as provided in the above embodiment. The wire controller can trigger the enabling control of the boost module by detecting whether the user touches the relevant key, so that after the user touches the key, the wire controller enables the boost module, so that the boost module provides an operating voltage for the MCU module, and then switches from the standby state to the working state, that is, wakes up the wire controller when the user touches the relevant key.

[0083] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0084] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An energy-saving power supply circuit, characterized in that: include: A battery power supply module, the battery power supply module is used to provide voltage for the circuit; A boost module, wherein the input end of the boost module is connected to the output end of the battery power module, and the boost module is used to boost the output voltage of the battery power module to switch from a standby state to a working state according to an enable control signal received by an enable end of the boost module; An enable control module, wherein the input end of the enable control module is connected to the output end of the battery power supply module, the output end of the enable control module is connected to the enable end of the boost module, and the enable control module is used to output the enable control signal to the enable end of the boost module according to the received control signal; An MCU module, wherein the power supply end of the MCU module is connected to the output end of the boost module, the control signal output end of the MCU module is connected to the first control end of the enable control module, and the MCU module is used to control the control signal output end of the MCU module to output the control signal according to the key touch signal received by the key detection end of the MCU module; A touch detection module, wherein the first signal output terminal and the second signal output terminal of the touch detection module are respectively connected to multiple key detection terminals of the MCU module, and the first signal output terminal of the touch detection module is also connected to the second control terminal of the enable control module. The touch detection module is used to output the control signal to the enable control module or output the key touch signal to the key detection terminal of the MCU module according to the received key pressing signal.

2. The energy-saving power supply circuit according to claim 1, characterized in that: The boost module includes a boost chip, an input inductor, a first diode, a first electrolytic capacitor, an input filter capacitor, a second electrolytic capacitor, an output filter capacitor, an output resistor and a feedback unit; The input pin of the boost chip is connected to the positive terminal of the first electrolytic capacitor, the negative terminal of the first electrolytic capacitor is grounded, and the input filter capacitor is connected in parallel with the first electrolytic capacitor; The input pin of the boost chip is also connected to the first end of the input inductor, the second end of the input inductor is connected to the switch pin of the boost chip, the anode end of the first diode is connected to the second end of the input inductor, and the cathode end of the first diode is connected to the output pin of the boost chip; The output pin of the boost chip is also connected to the positive terminal of the second electrolytic capacitor, the negative terminal of the second electrolytic capacitor is grounded, and the output filter capacitor and the output resistor are both connected in parallel with the second electrolytic capacitor; The input end of the feedback unit is connected to the output pin of the boost chip, and the feedback output end of the feedback unit is connected to the feedback pin of the boost chip.

3. The energy-saving power supply circuit according to claim 2, characterized in that: The feedback unit includes a first voltage-dividing resistor, a second voltage-dividing resistor and a feedback capacitor; The first end of the first voltage-dividing resistor is connected to the output pin of the boost chip, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor, the second end of the second voltage-dividing resistor is grounded, the feedback capacitor is connected in parallel with the second voltage-dividing resistor, and the first end of the second voltage-dividing resistor serves as the feedback output end of the feedback unit and is connected to the feedback pin of the boost chip.

4. The energy-saving power supply circuit according to claim 1, characterized in that: The enabling control module includes a PNP transistor, a third voltage-dividing resistor, a first signal access unit and a second signal access unit; The emitter terminal of the PNP transistor is connected to the output terminal of the battery power supply module, the collector terminal of the PNP transistor is connected to the enable terminal of the boost module, and the base terminal of the PNP transistor is connected to the signal output terminal of the first signal access unit and the signal output terminal of the second signal access unit; A first end of the third voltage-dividing resistor is connected to the emitter end of the PNP transistor, and a second end of the third voltage-dividing resistor is connected to the base end of the PNP transistor; The signal access end of the first signal access unit is connected to the control signal output end of the MCU module, and the signal access end of the second signal access unit is connected to the first signal output end of the touch detection module.

5. The energy-saving power supply circuit according to claim 4, characterized in that: The first signal access unit includes a first current limiting resistor and a second diode, the first end of the first current limiting resistor is connected to the base end of the PNP transistor, the second end of the first current limiting resistor is connected to the anode end of the second diode, and the cathode end of the second diode is connected to the control signal output end of the MCU module.

6. The energy-saving power supply circuit according to claim 4 or 5, characterized in that: The second signal access unit includes a second current limiting resistor, a third diode and a first filter capacitor, the first end of the second current limiting resistor is connected to the base end of the PNP transistor, the second end of the second current limiting resistor is connected to the anode end of the third diode, the first filter capacitor is connected in parallel with the second current limiting resistor, and the cathode end of the third diode is connected to the first signal output end of the touch detection module.

7. The energy-saving power supply circuit according to claim 1, characterized in that: It also includes a voltage sampling module, the input end of the voltage sampling module is connected to the output end of the battery power module, the sampling output end of the voltage sampling module is connected to the voltage detection end of the MCU module, and the voltage sampling module is used to feed back the output voltage of the battery power module to the MCU module.

8. The energy-saving power supply circuit according to claim 7, characterized in that: The voltage sampling module includes a first sampling resistor, a second sampling resistor and a second filter capacitor; The first end of the first sampling resistor is connected to the output end of the battery power supply module, the second end of the first sampling resistor is connected to the first end of the second sampling resistor, and the first end of the second sampling resistor serves as the sampling output end of the voltage sampling module and is connected to the voltage detection end of the MCU module, the second end of the second sampling resistor is grounded, and the second filter capacitor is connected in parallel with the second sampling resistor.

9. A circuit board, characterized in that: Comprising the energy-saving power supply circuit as described in any one of claims 1-8.

10. A wire controller, characterized in that: Comprising the circuit board as claimed in claim 9.

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