Power button control circuit
By incorporating RC delay filtering and anti-jitter circuit design into the power button control circuit, combined with a MOS switching circuit, the problems of large size, difficult operation, and slow switching of mechanical self-locking interlock switches are solved, achieving stable power control and low-power operation, suitable for speakers and other electronic devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional mechanical self-locking interlock switches have problems such as large size, difficult operation, slow switching speed, easy wear and tear, and complex circuit adaptation in electronic devices, making it difficult to meet the requirements of miniaturization, fast switching and high reliability.
The power button control circuit includes an RC delay filter circuit, an anti-bounce circuit, a first MOS switch circuit, a second MOS switch circuit, a third MOS switch circuit, and a tactile button. Through their coordinated operation, it achieves precise control of power input and output, eliminates sudden current at the moment of power-on, enhances system reliability, and reduces power consumption.
It improves power switching efficiency, reduces equipment failure rate, extends service life, ensures stable power startup and accurate button operation, and is suitable for long-term operation and low-energy-consumption equipment.
Smart Images
Figure CN224097700U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of key control, specifically relates to a power key control circuit. BACKGROUND
[0002] In the field of modern electronic equipment, from the daily use of electrical appliances, to professional precision instruments, to complex automation control systems, power key switches play an indispensable role and are widely used. Traditional mechanical self-locking interlocking switches have many limitations in long-term practical application.
[0003] In terms of spatial layout, mechanical self-locking interlocking switches are usually large in size, which occupies too much valuable space in today's electronic device design trend of pursuing miniaturization and integration, limiting the further development of devices to be lighter, thinner and more compact. In terms of operation experience, it requires a large touch force to achieve switch action, which not only increases the burden of user operation, but also is particularly inconvenient in some scenes with high requirements for operation convenience and sensitivity.
[0004] In terms of performance, mechanical self-locking interlocking switches have low switching speed and cannot quickly respond to changes in signals in the circuit, which will cause the system to react slowly and affect the overall operation efficiency in circuits that need to be frequently and quickly switched. Moreover, due to frequent mechanical action, the internal contact components are prone to wear and tear, which greatly reduces the service life of the switch and increases the maintenance cost and failure risk of the device. In addition, the conversion speed of mechanical self-locking interlocking switches is low, which is difficult to meet the demand of high-speed circuit for rapid conversion of signals.
[0005] In terms of circuit adaptation, mechanical self-locking interlocking switches are not easy to use with circuits, and in complex circuit design, additional auxiliary circuits and mechanical structures are often needed to realize the cooperative work with the overall circuit, which not only increases the complexity and cost of circuit design, but also may introduce more potential failure points. UTILITY MODEL CONTENTS
[0006] The utility model provides a power key control circuit with low cost and simple structure to solve the defects and deficiencies of the prior art.
[0007] In order to achieve the above object, the technical scheme adopted by the utility model is a power button control circuit applied to a sound box, comprising a power input end, a power output end, an RC delay filter circuit, a jitter prevention circuit, a first MOS switch circuit, a second MOS switch circuit, a third MOS switch circuit and a tactile button; one end of the RC delay filter circuit, the first MOS switch circuit, the second MOS switch circuit and the third MOS switch circuit is electrically connected with the power input end, and the other end of the first MOS switch circuit is electrically connected with the power output end; one end of the tactile button is electrically connected with the RC delay filter circuit, and the other end is electrically connected with the second MOS switch circuit; the second MOS switch circuit is electrically connected with the third MOS switch circuit; and the jitter prevention circuit is electrically connected with the tactile button.
[0008] Further, the RC delay filter circuit comprises a first capacitor and a first resistor, one end of the first resistor is connected to the common end of the second MOS switch circuit and the third MOS switch circuit, and the other end is electrically connected with the jitter prevention circuit; one end of the first capacitor is connected to the common end of the tactile button and the jitter prevention circuit, and the other end is grounded.
[0009] Further, the first MOS switch circuit comprises a first MOS tube and a second resistor; the source of the first MOS tube is electrically connected with the power input end, the drain of the first MOS tube is electrically connected with the power output end, and the gate of the first MOS tube is electrically connected with the second MOS switch circuit; one end of the second resistor is electrically connected with the gate of the first MOS tube, and the other end is electrically connected with the power input end.
[0010] Further, the second MOS switch circuit comprises a second MOS tube and a third resistor; the source of the second MOS tube is grounded, the drain of the second MOS tube is electrically connected with the gate of the first MOS tube, and the gate of the second MOS tube is electrically connected with the common end of the third MOS switch circuit and the first resistor; one end of the third resistor is electrically connected with the first resistor, and the other end is electrically connected with the second resistor.
[0011] Further, the third MOS switch circuit comprises a third MOS tube and a fourth resistor; the drain of the third MOS tube is electrically connected with the gate of the second MOS tube, one end of the fourth resistor is electrically connected with the drain of the second MOS tube, and the other end is electrically connected with the gate of the third MOS tube; the gate of the third MOS tube is electrically connected with the tactile button, and the source of the third MOS tube is grounded.
[0012] Further, the first MOS tube is a P-channel MOS tube, and the second MOS tube and the third MOS tube are both N-channel MOS tubes.
[0013] The utility model discloses a beneficial effect has:
[0014] The utility model provides a kind of power button control circuit, burst current possibly appearing in power starting moment is effectively eliminated by using RC delay filter circuit, protect the equipment from damage, and ensure the stability in power starting process.Meanwhile, the design of anti-shake circuit further enhances the reliability of system, by eliminating the jitter signal possibly generated when key operation, the accuracy of trigger signal is guaranteed.The precise control to power input and output is realized by the collaborative work of first MOS switch circuit, second MOS switch circuit and third MOS switch circuit.Such design not only improves power switching efficiency, also reduces power consumption, simultaneously it is especially suitable for being applied in the equipment needing long time operation and low energy consumption. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the working principle diagram of the utility model a kind of power button control circuit;
[0016] Figure 2 It is the circuit principle diagram of the utility model a kind of power button control circuit. DETAILED DESCRIPTION
[0017] The technical scheme in the utility model embodiment will be described clearly and completely in conjunction with the drawings of the utility model embodiments, apparently, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment.Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.
[0018] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the utility model embodiments are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.
[0019] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and it is not within the protection range required by the utility model.
[0020] The utility model provides a kind of power button control circuit.
[0021] In the embodiment of the utility model, Fig. 1-2 As shown in the figure, the power button control circuit is applied to a sound box, comprising a power input end, a power output end, an RC delay filter circuit, a jitter prevention circuit, a first MOS switch circuit, a second MOS switch circuit, a third MOS switch circuit and a tactile button. One end of the RC delay filter circuit, the first MOS switch circuit, the second MOS switch circuit and the third MOS switch circuit is electrically connected to the power input end, and the other end of the first MOS switch circuit is electrically connected to the power output end. One end of the tactile button is electrically connected to the RC delay filter circuit, and the other end is electrically connected to the second MOS switch circuit. The second MOS switch circuit is electrically connected to the third MOS switch circuit, and the jitter prevention circuit is electrically connected to the tactile button.
[0022] In the embodiment, the RC delay filter circuit comprises a first capacitor and a first resistor. One end of the first resistor is connected to the common end of the second MOS switch circuit and the third MOS switch circuit, and the other end is electrically connected to the jitter prevention circuit. One end of the first capacitor is connected to the common end of the tactile button and the jitter prevention circuit, and the other end is grounded.
[0023] In the embodiment, the first MOS switch circuit comprises a first MOS tube and a second resistor. The source of the first MOS tube is electrically connected to the power input end, the drain of the first MOS tube is electrically connected to the power output end, and the gate of the first MOS tube is electrically connected to the second MOS switch circuit. One end of the second resistor is electrically connected to the gate of the first MOS tube, and the other end is electrically connected to the power input end.
[0024] In the embodiment, the second MOS switch circuit comprises a second MOS tube and a third resistor. The source of the second MOS tube is grounded, the drain of the second MOS tube is electrically connected to the gate of the first MOS tube, and the gate of the second MOS tube is electrically connected to the common end of the third MOS switch circuit and the first resistor. One end of the third resistor is electrically connected to the first resistor, and the other end is electrically connected to the second resistor.
[0025] In the embodiment, the third MOS switch circuit comprises a third MOS tube and a fourth resistor. The drain of the third MOS tube is electrically connected to the gate of the second MOS tube, one end of the fourth resistor is electrically connected to the drain of the second MOS tube, and the other end is electrically connected to the gate of the third MOS tube. The gate of the third MOS tube is electrically connected to the tactile button, and the source of the third MOS tube is grounded.
[0026] In the embodiment, the first MOS transistor is a P-channel MOS transistor, and the second MOS transistor and the third MOS transistor are N-channel MOS transistors.
[0027] The application is used for controlling the on-off between the power input end DC and the power output end SYS. Specifically, an RC delay filter circuit is formed by the first resistor 4R32 and the first capacitor 4C26, and a jitter elimination circuit is formed by the fifth resistor 4R33 and the first capacitor 4C26.
[0028] Through the connection of the RC delay filter circuit and the power input end, the voltage peak and current surge are effectively inhibited at the moment of power access. When the external DC power 5V_IN is accessed, the RC delay filter circuit composed of the first resistor 4R32 and the first capacitor 4C26 enables the first capacitor 4C26 to be gradually charged, and the voltage rises stably, avoiding the sudden large current impact on the equipment at the start of the power supply, greatly improving the stability of the equipment in the initial stage of power access, and laying a foundation for the reliable operation of the equipment.
[0029] The connection of the jitter elimination circuit and the light touch button SW1 is the key to ensuring the accuracy of the button operation. The mechanical light touch button SW1 is prone to jitter in the triggering process, leading to unstable signals and causing false triggering. The jitter elimination circuit filters out the noise generated by jitter through processing of the light touch button SW1 signal, and only outputs stable and reliable trigger signals. Whether in the scene of frequent operation or instantaneous triggering, the light touch button SW1 signal can be accurately transmitted, providing protection for the correct action of the subsequent circuit.
[0030] The connection of the first MOS switch circuit, the second MOS switch circuit and the third MOS switch circuit with the power input end builds a set of cooperatively working power supply control system. Taking the third MOS transistor Q3 as an example, it will not be turned on until the light touch button SW1 is triggered and the gate voltage meets the condition, realizing effective control of the power supply. After the second MOS transistor Q2 and the first MOS transistor Q1 are turned on in turn according to the design logic, the power output end SYS can stably output power, providing continuous and stable power supply for the equipment and meeting the power demand of the equipment in different working states.
[0031] One end of the light touch button SW1 is electrically connected with the RC delay filter circuit, and the other end is electrically connected with the second MOS switch circuit. This unique connection not only realizes the control of the power on-off, but also ingeniously combines the characteristics of the RC delay filter circuit. When the light touch button SW1 is triggered, the voltage state of the RC circuit can be considered comprehensively to ensure that the MOS switch circuit acts at the right time, so that the entire circuit system can be flexibly adapted under different working conditions, improving the adaptability and reliability of the circuit.
[0032] Through the coordinated work of each part of the circuit, from the stable processing of the power input, to the precise control of the key trigger, to the efficient power supply of the first, second and third MOS switch circuits, the performance of the entire system is greatly improved. The device failure rate is effectively reduced, the device service life is prolonged, the device working stability and reliability in various complex environments are improved, and all-round protection is provided for the efficient operation of the device.
[0033] Specifically, in the actual application scenario, when the power input end is connected to the external DC power 5V IN, the sound box obtains the power input. However, at this time, the third MOS tube Q3 will not be immediately turned on. Because the RC delay filter circuit composed of the first resistor 4R32 and the first capacitor 4C26 begins to play a role, 5V IN will first charge the first capacitor 4C26, and with the advancement of the charging process, the voltage of the first capacitor 4C26 will gradually rise.
[0034] When the key of the tactile key SW1 is triggered to close, and the gate voltage of the third MOS tube Q3 is greater than its conduction voltage, the third MOS tube Q3 begins to conduct. At this time, the drain of the third MOS tube Q3 will pull 5V IN to low level.
[0035] After the tactile key SW1 is opened, the amount of electricity stored by the first capacitor 4C26 will be pulled low by the drain of the third MOS tube Q3. Then, the first resistor 4R32 will discharge the first capacitor 4C26 until the voltage of the first capacitor 4C26 drops to about 0V. If the tactile key SW1 is pressed again to make the key trigger closed, since the voltage of the first capacitor 4C26 is about 0V at this time, the third MOS tube Q3 will not conduct. When the gate voltage of the second MOS tube Q2 is greater than the source voltage, the drain and source of the second MOS tube Q2 are turned on. Further, the gate voltage of the first MOS tube Q1 is less than the source voltage, and the first MOS tube Q1 is also turned on, and the power output end SYS begins to supply power.
[0036] At the same time, the application adopts RC delay filter circuit combined with anti-shake circuit, which can effectively eliminate the jitter signal of the power key, ensure the reliability of the trigger, and on the other hand, can ensure the stability of the power start, avoid the damage of the sudden current to the device. In addition, it can also improve the response time and accuracy of the key operation, reduce the occurrence of misoperation. At the same time, in terms of power consumption optimization, low-power MOS tubes are selected and matched with high-resistance resistors, thereby reducing the overall power consumption.
[0037] The application realizes that the switch state of the electrical equipment can be conveniently controlled through the light touch button SW1, has the characteristics of simple circuit and flexible application. The light touch button SW1 is small in size, not easy to wear, small in required contact force, fast in conversion speed, can efficiently replace the switch operation in the IC control mode, and thus effectively reduces the cost. The design not only guarantees the convenience and durability of the use, but also achieves the economical and practical effect by simplifying the circuit and reducing the component cost.
[0038] It should be noted that the design of the application is not limited to be applied in the sound box equipment, and can be applied in other electronic equipment according to actual needs.
[0039] The above only describes the preferred embodiments of the application, and does not limit the patent range of the application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the application concept of the application, or the contents of the application specification and the drawings are included in the patent protection range of the application.
Claims
1. A power button control circuit, characterized in that, This device, used in a speaker, includes a power input terminal, a power output terminal, an RC delay filter circuit, an anti-shake circuit, a first MOS switch circuit, a second MOS switch circuit, a third MOS switch circuit, and a tactile button. One end of each of the RC delay filter circuit, the first MOS switch circuit, the second MOS switch circuit, and the third MOS switch circuit is electrically connected to the power input terminal, and the other end of the first MOS switch circuit is electrically connected to the power output terminal. One end of the tactile button is electrically connected to the RC delay filter circuit, and the other end is electrically connected to the second MOS switch circuit. The second MOS switch circuit is electrically connected to the third MOS switch circuit, and the anti-shake circuit is electrically connected to the tactile button.
2. The power button control circuit as described in claim 1, characterized in that, The RC delay filter circuit includes a first capacitor and a first resistor. One end of the first resistor is connected to the common terminal of the second MOS switch circuit and the third MOS switch circuit, and the other end is electrically connected to the anti-shake circuit. One end of the first capacitor is connected to the common terminal of the tactile button and the anti-shake circuit, and the other end is grounded.
3. The power button control circuit as described in claim 1, characterized in that, The first MOS switching circuit includes a first MOS transistor and a second resistor; the source of the first MOS transistor is electrically connected to the power input terminal, the drain of the first MOS transistor is electrically connected to the power output terminal, and the gate of the first MOS transistor is electrically connected to the second MOS switching circuit; one end of the second resistor is electrically connected to the gate of the first MOS transistor, and the other end is electrically connected to the power input terminal.
4. The power button control circuit as described in claim 3, characterized in that, The second MOS switching circuit includes a second MOS transistor and a third resistor; the source of the second MOS transistor is grounded, the drain of the second MOS transistor is electrically connected to the gate of the first MOS transistor, and the gate of the second MOS transistor is electrically connected to the common terminal of the third MOS switching circuit and the first resistor; one end of the third resistor is electrically connected to the first resistor, and the other end is electrically connected to the second resistor.
5. The power button control circuit as described in claim 4, characterized in that, The third MOS switching circuit includes a third MOS transistor and a fourth resistor; the drain of the third MOS transistor is electrically connected to the gate of the second MOS transistor, one end of the fourth resistor is electrically connected to the drain of the second MOS transistor, and the other end is electrically connected to the gate of the third MOS transistor; the gate of the third MOS transistor is electrically connected to the tactile button, and the source of the third MOS transistor is grounded.
6. The power button control circuit as described in claim 5, characterized in that, The first MOSFET is a P-channel MOSFET, while the second and third MOSFETs are both N-channel MOSFETs.