Automatic power-on start-up control circuit with false touch protection function
By designing an automatic power-on control circuit that includes a central control module and various electronic components, the problem of MTK platform SOCs failing to power on accurately was solved, achieving automatic power-on, improving circuit stability and reliability, reducing costs, expanding application scope, and optimizing user experience.
Patent Information
- Application Number
- CN202520365645.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-03-04
AI Technical Summary
MTK platform SoCs cannot achieve accurate power-on control after power-on, and existing solutions are complex and costly.
An automatic power-on control circuit was designed, comprising a central control module, a control chip, multiple transistors, Schottky diodes, inductors, and Zener diodes. Automatic power-on is achieved through hardware circuitry, and filtering and anti-interference measures are introduced to prevent false triggering.
It enables automatic and accurate power-on of MTK platform devices, improves circuit stability and reliability, reduces hardware complexity and cost, expands application scope, and enhances user experience and product competitiveness.
Smart Images
Figure CN223809762U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of control circuit especially relates to an automatic power-on start control circuit with mistaken touch protection function. BACKGROUND
[0002] The chip of MTK platform is widely applied to the ordinary consumer electronic field such as tablet computer, smart phone, vehicle electronic, and is also used in industrial monitoring, data monitoring, smart home and multiple fields. In the working scene needing system power-on, such as refrigerator, access control machine, the existing solution usually depends on the special integrated circuit or automatic start equipment to output start signal, which not only leads to internal circuit complexity, but also increases use cost. Although some platforms can realize automatic start by the register of PMIC, but MTK platform does not support this function, and itself needs to press PowerKey button for 3 seconds to start normally. Therefore, in order to realize the power-on start of MTK platform SOC, a new hardware scheme is needed to solve this problem. UTILITARY MODEL CONTENT
[0003] The utility model embodiment provides a kind of automatic power-on start control circuit with mistaken touch protection function, to solve the problem that MTK platform SOC cannot be realized accurate start control after power-on in prior art method.
[0004] The utility model embodiment discloses an automatic power-on start control circuit with mistaken touch protection function for MTK platform SOC automatic power-on start control, the control circuit includes center control module, control chip access end, control power supply, first triode, second triode and voltage regulation end, and the control power supply is arranged in the MTK platform to be started;Control chip is arranged in the center control module, one end of the control chip access end is connected with the control chip, and the other end of the control chip access end is connected with the base of the second triode;The collector of the second triode is connected with the base of the first triode, and the collector of the first triode is connected with the voltage regulation end;The base of the first triode and the collector of the second triode are connected with the control power supply simultaneously.
[0005] Further, Schottky diode and first resistor are arranged between the control chip access end and the second triode, one end of the first resistor is connected with the control chip access end, the other end is connected with the anode of the Schottky diode, and the cathode of the Schottky diode is connected with the base of the second triode.
[0006] Further, the control circuit further comprises a data exchange end connected with the base of the second triode, a voltage stabilizing diode and a second inductor are arranged between the data exchange end and the second triode, one end of the second inductor is connected with the data exchange end, the other end is connected with the positive pole of the voltage stabilizing diode, and the negative pole of the voltage stabilizing diode is connected with the base of the second triode.
[0007] Further, one end of the control chip access end is set as a grounding end, and a third inductor is arranged between the Schottky diode and the grounding end.
[0008] Further, a fourth inductor is arranged between the base of the first triode and the control power supply.
[0009] Further, a fifth inductor is arranged between the voltage regulating end and the collector of the first triode.
[0010] Further, the emitter of the first triode is grounded.
[0011] Further, the emitter of the second triode is grounded.
[0012] The control circuit realizes the automatic power-on accurate start-up control function of the MTK platform device, improves the stability, reliability and environmental adaptability of the circuit, prevents accidental touch start-up, and provides users with more efficient and convenient use experience. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0014] Figure 1 The overall structure diagram of the automatic power-on start-up control circuit with accidental touch protection function provided by the embodiments of the present application.
[0015] Reference numerals:
[0016] 1, central control module; 2, control chip access end; 3, control power supply; 4, first triode; 5, second triode; 6, voltage regulating end; 7, Schottky diode; 8, first resistor; 9, data exchange end; 10, voltage stabilizing diode; 11, second inductor; 12, third inductor; 13, fourth inductor; 14, fifth inductor. DETAILED DESCRIPTION
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0018] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0019] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0020] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0021] like Figure 1 As shown, this embodiment provides an automatic power-on control circuit with accidental touch protection function for automatic power-on control of an MTK platform SOC. The control circuit includes a central control module 1, a control chip access terminal 2, a control power supply 3, a first transistor 4, a second transistor 5, and a voltage adjustment terminal 6. The control power supply 3 is located within the MTK platform to be powered on. The central control module 1 contains a control chip. One end of the control chip access terminal 2 is connected to the control chip, and the other end of the control chip access terminal 2 is connected to the base of the second transistor 5. The collector of the second transistor 5 is connected to the base of the first transistor 4, and the collector of the first transistor 4 is connected to the voltage adjustment terminal 6. The base of the first transistor 4 and the collector of the second transistor 5 are both connected to the control power supply 3.
[0022] In actual use scenarios, the control circuit provided by the embodiment can be widely applied to various electronic devices driven by MTK platform SOC, especially devices that can automatically start working as soon as the system is powered on, such as smart refrigerators, access control systems, industrial monitoring devices, and the like. When the MTK platform device is connected to the power supply, the control power supply 3 (OBD_5V) is powered on to provide working voltage for the entire control circuit. In the default state of starting, the PWEKEY_Release signal output by the center control module 1 (CPU) is at a low level, at this time, the second transistor 5 (Q2810) is cut off, and the first transistor 4 (Q2809) is turned on. After the first transistor 4 (Q2809) is turned on, the voltage regulating end 6 (PWRKEY) connected to the collector of the first transistor 4 (Q2809) is pulled down to the ground, simulating the action of pressing the PowerKey button for a long time, thereby triggering the starting process of the MTK platform SOC. The device starts and enters the system startup process. During the system startup process, when the display screen backlight is turned on and before entering the kernel stage, the center control module 1 (CPU) outputs the PWEKEY_Release signal to be at a high level. After the PWEKEY_Release signal becomes high, the second transistor 5 (Q2810) is turned on, the first transistor 4 (Q2809) is cut off, and the voltage of the voltage regulating end 6 (PWRKEY) rises, simulating the action of releasing the PowerKey button, and the automatic power-on starting process is completed. In addition, when the VBUS (data exchange end 9) is inserted, the second transistor 5 (Q2810) will be controlled to remain in the cut-off state, preventing accidental triggering of the starting process and ensuring that the device will not be mistakenly started when the USB firmware is burned or the MTK meta mode is entered. The above control circuit solves the problem that the MTK platform SOC cannot automatically start when powered on, and does not need to be started by pressing the PowerKey for a long time, thereby enhancing the application capability of the MTK platform in the field of automatic power-on starting. Through the simple design of the hardware circuit, the use of complex integrated circuits or special automatic starting devices is avoided, the cost is reduced, the mis-touch protection function is provided, the accidental starting in the USB data transmission or system maintenance mode is avoided, and the stability and reliability of the system are improved. The above control circuit fills the functional defects of the MTK platform in the field of automatic power-on starting, expands the application range of the MTK platform, simplifies the design of the starting control circuit, reduces the hardware complexity and cost, improves the production efficiency, ensures that the device can be automatically started stably and reliably after being powered on, optimizes the user experience, and enhances the market competitiveness of the MTK platform products, providing more diversified choices for consumers and enterprise users.
[0023] Further, a Schottky diode 7 and a first resistor 8 are arranged between the control chip access end 2 and the second transistor 5. One end of the first resistor 8 is connected with the control chip access end 2, the other end is connected with the anode of the Schottky diode 7, and the cathode of the Schottky diode 7 is connected with the base of the second transistor 5.
[0024] Further, the control circuit further comprises a data exchange terminal 9 connected to the base of the second transistor 5, and a voltage stabilizing diode 10 and a second inductor 11 are arranged between the data exchange terminal 9 and the second transistor 5. One end of the second inductor 11 is connected to the data exchange terminal 9, and the other end is connected to the positive electrode of the voltage stabilizing diode 10. The negative electrode of the voltage stabilizing diode 10 is connected to the base of the second transistor 5.
[0025] Specifically, a Schottky diode 7 and a first resistor 8 are arranged between the control chip access terminal 2 and the second transistor 5. One end of the first resistor 8 is connected to the control chip access terminal 2, and the other end is connected to the positive electrode of the Schottky diode 7. The negative electrode of the Schottky diode 7 is connected to the base of the second transistor 5. The first resistor 8 here plays a filtering role, which can suppress the noise on the power line and reduce the interference to the base signal of the second transistor 5. The Schottky diode 7 is used to stabilize the voltage of the control chip access terminal 2, preventing voltage fluctuations from causing false triggering of the base of the second transistor 5. This improves the anti-interference ability of the circuit and ensures the stability of the control signal in a complex electromagnetic environment. Through filtering and voltage stabilization, false triggering caused by power fluctuations or noise is reduced, and the accuracy of the power-on operation is improved. Further, the control circuit further comprises a data exchange terminal 9 connected to the base of the second transistor 5, and a voltage stabilizing diode 10 and a second inductor 11 are arranged between the data exchange terminal 9 and the second transistor 5. Such design is to prevent false power-on during data transmission. One end of the second inductor 11 is connected to the data exchange terminal 9 (such as the VBUS of USB), and the other end is connected to the positive electrode of the voltage stabilizing diode 10. The negative electrode of the voltage stabilizing diode 10 is connected to the base of the second transistor 5. When the data exchange terminal 9 (such as USB connection) is inserted, the second inductor 11 suppresses the instantaneous current change, preventing false triggering caused by current impact. The voltage stabilizing diode 10 ensures that even if there is voltage change in the data exchange terminal 9, it will not affect the base voltage of the second transistor 5, thereby preventing false power-on. When data exchange (such as USB data transmission or firmware update) is performed, an additional protection mechanism is provided to prevent the device from false power-on. Through the combination of inductor and voltage stabilizing diode, the stability and reliability of the circuit are further improved, and the user experience is optimized. The hardware of the device is protected from damage caused by voltage spikes that may occur during data transmission. In summary, these improvements not only enhance the stability and reliability of the circuit, but also ensure that the device can work normally in various complex environments, improving the overall performance and market competitiveness of the product.
[0026] Further, one end of the control chip access terminal 2 is connected to the ground, and a third inductor 12 is arranged between the Schottky diode 7 and the ground.
[0027] Further, a fourth inductor 13 is arranged between the base of the first transistor 4 and the control power supply 3.
[0028] Further, a fifth inductor 14 is arranged between the voltage regulation terminal 6 and the collector of the first transistor 4.
[0029] Specifically, one end of the control chip access terminal 2 is set as a ground terminal, and a third inductor 12 is arranged between the Schottky diode 7 and the ground terminal. This can further filter and suppress noise, protecting the control chip from interference on the power line. The third inductor 12 connects the negative pole of the Schottky diode 7 to the ground terminal, providing a low impedance path for suppressing high-frequency noise while maintaining the stability of the ground reference point. A fourth inductor 13 is arranged between the base of the first transistor 4 and the control power supply 3. The function of this inductor is to limit the rapid change of the base current, preventing false triggering caused by current spikes. The fourth inductor 13 between the control power supply 3 and the base of the first transistor 4 helps to smooth the output of the power supply, reducing the impact of power supply noise on the operation of the transistor. A fifth inductor 14 is arranged between the voltage regulation terminal 6 and the collector of the first transistor 4. This inductor helps to stabilize the output of the voltage regulation terminal 6, reducing voltage fluctuations caused by load changes. The fifth inductor 14 connects the voltage regulation terminal 6 to the collector of the first transistor 4, providing a buffering effect to protect the voltage regulation circuit from load transients. By setting the third inductor 12, the signal quality of the control chip access terminal 2 is further improved, reducing ground interference and enhancing the overall anti-interference ability of the circuit. The use of the fourth inductor 13 helps to protect the first transistor 4 from rapid current changes on the power line, thereby improving the stability and reliability of the startup. The fifth inductor 14 ensures that the output of the voltage regulation terminal 6 is more stable, reducing the impact of voltage fluctuations on the collector of the first transistor 4, improving the efficiency and performance of the circuit. The addition of these additional inductor elements not only enhances the filtering ability of the circuit, but also provides an additional protection layer, ensuring the stability and reliability of the MTK platform SOC during the power-on process. These design optimizations help the device better adapt to different power supplies and environmental conditions in various application scenarios, thereby improving the market competitiveness of the product.
[0030] Further, the emitter of the first transistor 4 is grounded.
[0031] Further, the emitter of the second transistor 5 is grounded.
[0032] Specifically, the emitter of the first transistor 4 and the second transistor 5 is grounded, which helps to ensure the normal operation of the transistors and improve the stability of the entire control circuit. The emitter of the first transistor 4 is grounded. This means that the first transistor 4 is configured as an NPN-type transistor, with its emitter connected to the ground reference point of the circuit. When the base of the first transistor 4 receives a signal from the control chip, current can flow from the collector to the emitter, completing the switching action through the load (such as the power input of the MTK platform). The emitter of the second transistor 5 is also grounded. This also applies to NPN-type transistors, with their emitters connected to the ground, ensuring that the second transistor 5 can operate normally. The role of the second transistor 5 may be to amplify the control signal or to be used as a switch, and grounding its emitter helps to maintain its normal working state. By grounding the emitters of the first transistor 4 and the second transistor 5, it is ensured that the transistors can work as expected, i.e. as switches to control the power input of the MTK platform. Grounding the emitter helps to stabilize the operation of the transistor, reducing the risk of false triggering due to power fluctuations or noise, and improving the reliability of the circuit. Grounding serves as a reference point for the circuit, providing a stable voltage reference, which is crucial for both analog signal processing and digital logic operations. Grounding design simplifies circuit layout and reduces the failure rate that may occur due to incorrect grounding of the emitter. Overall, these design decisions help to ensure the stability and reliability of the control circuit during the automatic power-on boot process, making the MTK platform more suitable for applications that require automatic boot functionality, such as smart home, industrial monitoring and automotive electronics. Through these optimizations, not only the performance of the product is improved, but also the trust and satisfaction of users for the product are enhanced.
[0033] The utility model discloses an automatic power-on control circuit with mistaken touch protection function for MTK platform SOC automatic power-on control, and the control circuit includes center control module 1, control chip access end 2, control power supply 3, first triode 4, second triode 5 and voltage regulation end 6, and control power supply 3 is arranged in the MTK platform of waiting to start, and the control chip is arranged in center control module 1, and one end of control chip access end 2 is connected with the control chip, and the other end of control chip access end 2 is connected with the base of second triode 5, and the collector of second triode 5 is connected with the base of first triode 4, and the collector of first triode 4 is connected with voltage regulation end 6, and the base of first triode 4 and the collector of second triode 5 are connected with control power supply 3 simultaneously. The automatic power-on control circuit with mistaken touch protection function can automatically start after the power is turned on without user operation, which meets the demand of specific application scenarios, such as refrigerator, access control system, etc. Circuit stability improvement: by introducing inductance, voltage stabilizing diode and other elements, the filtering and anti-interference ability of the circuit is enhanced, ensuring that the device can work stably under various power supplies and environmental conditions. Reduction of hardware cost and complexity: the design scheme simplifies the start-up control circuit, reduces the need for special integrated circuits or devices, and reduces production cost and circuit complexity. System reliability enhancement: through circuit protection measures such as the use of voltage stabilizing diode and inductance, the influence of voltage spikes and noise on the circuit is reduced, and the reliability and failure rate of the system are improved. Flexibility and application range expansion: this scheme enables MTK platform to be applied to more fields such as industrial monitoring and smart home, enhancing the market adaptability and competitiveness of the product. User experience optimization: the automatic start function provides convenience for users, especially in application scenarios that require immediate response of the device, improving user experience. Protection circuit design: by setting the emitter ground and other protection elements, the triode and control chip are protected from damage, prolonging the service life of the device. Data transmission security: in the design of data exchange end 9, through additional voltage stabilizing diode and inductance, the voltage stability during data transmission is ensured, preventing data errors or device damage due to voltage fluctuations. Environmental adaptability: the improved circuit design can better adapt to different working environments, including temperature, humidity, electromagnetic interference, etc., ensuring that the device can operate stably under various conditions. Overall, this scheme realizes the automatic power-on accurate start control function of MTK platform device through a series of circuit design and optimization, improves the stability, reliability and environmental adaptability of the circuit, and prevents mistaken touch start, providing users with more efficient and convenient use experience.
[0034] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An automatic power-on boot control circuit with a mistaken touch protection function, used for MTK platform SOC automatic power-on boot control, characterized in that, The control circuit comprises: a central control module, a control chip access end, a control power supply, a first triode, a second triode and a voltage regulation end, wherein the control power supply is arranged in an MTK platform to be started; a control chip is arranged in the central control module, one end of the control chip access end is connected with the control chip, and the other end of the control chip access end is connected with the base of the second triode; the collector of the second triode is connected with the base of the first triode, and the collector of the first triode is connected with the voltage regulation end; the base of the first triode and the collector of the second triode are connected with the control power supply.
2. The automatic power-on control circuit with the mistaken touch protection function according to claim 1, characterized in that, a Schottky diode and a first resistor are arranged between the control chip access end and the second triode, one end of the first resistor is connected with the control chip access end, the other end is connected with the positive electrode of the Schottky diode, the negative electrode of the Schottky diode is connected with the base of the second triode.
3. The automatic power-on control circuit with the mistaken touch protection function according to claim 2, characterized in that, The control circuit further comprises a data exchange end, the data exchange end is connected with the base of the second triode, a voltage stabilizing diode and a second inductor are arranged between the data exchange end and the second triode, one end of the second inductor is connected with the data exchange end, the other end is connected with the positive electrode of the voltage stabilizing diode, and the negative electrode of the voltage stabilizing diode is connected with the base of the second triode.
4. The automatic power-on control circuit with the mistaken touch protection function according to claim 3, characterized in that, One end of the control chip access end is arranged as a grounding end, and a third inductor is arranged between the Schottky diode and the grounding end.
5. The automatic power-on control circuit with the mistaken touch protection function according to claim 4, characterized in that, A fourth inductor is arranged between the base of the first triode and the control power supply.
6. The automatic power-on control circuit with the mistaken touch protection function according to claim 5, characterized in that, A fifth inductor is arranged between the voltage regulation end and the collector of the first triode.
7. The automatic power-on control circuit with the mistaken touch protection function according to claim 1, characterized in that, The emitter of the first triode is grounded.
8. The automatic power-on control circuit with the unintended touch protection function according to claim 1, wherein The emitter of the second triode is grounded.