Power-on starting control circuit and power utilization system

Abstract

The invention provides a power-on starting control circuit and a power utilization system, the circuit comprises a time-delay charging and discharging module, a conduction module and a key switch module, the input end of the time-delay charging and discharging module is connected with a power supply voltage, the first output end is connected with the first input end of the conduction module, and the second output end is grounded; a second input end of the conduction module is connected with a first output end of the key switch module, a third input end is connected with a working voltage, a first output end is connected with a start control pin of target equipment to be controlled, and a second output end is grounded; the second output end of the key switch module is grounded; the delay charging and discharging module controls the turn-off duration and the turn-on duration of the turn-on module after the power supply voltage is accessed, so as to adjust the delay duration before starting of the target equipment and the starting duration of the target equipment; when the key switch module is triggered, the key is closed, the level of the starting control pin is lowered, so that the target equipment is started, the target equipment is automatically started after being powered on, key triggering starting is compatible, and the reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automatic startup circuits, and in particular to a power-on startup control circuit and a power consumption system. Background Art

[0002] In the manufacturing and use of electronic devices such as embedded industrial control motherboards with integrated multi-function modules, it is often necessary for the system to automatically start up when powered on. The Power-key pin of the electronic device is in a high level state by default, and the level of the Power-key pin needs to be pulled down to start up.

[0003] The level of the Power-key pin can be controlled to be lowered through a physical button switch, a microcontroller unit, a voltage monitoring chip or a dedicated power-on startup chip. However, the control method of the physical button switch is essentially controlled manually, and it is impossible to achieve automatic power-on; the control method of the microcontroller unit, the voltage monitoring chip or the dedicated power-on startup chip requires the automatic power-on circuit to be in a working state all the time, and the change of the input voltage will affect the normal operation of the electronic equipment, and the control software needs to be written.

[0004] At present, a dedicated integrated circuit is usually used to output a power-on signal, and a general purpose input output interface (General Purpose Input Output, referred to as GPIO) is used to control the power-on of a metal-oxide-semiconductor field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, referred to as MOSFET tube). However, this has the disadvantages of complex design, large demand for electronic materials, and the need for software debugging.

[0005] Therefore, there are certain limitations in the prior art of controlling the automatic startup of electronic equipment. Summary of the invention

[0006] The purpose of the present application is to provide a power-on startup control circuit and a power consumption system to address the practical needs of the prior art in which there are certain limitations in controlling the automatic startup of electronic equipment upon power-on.

[0007] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0008] In a first aspect, an embodiment of the present application provides a power-on startup control circuit, including: a delayed charge and discharge module, a conduction module, and a key switch module;

[0009] The input end of the delayed charge and discharge module is used to access the power supply voltage, the first output end of the delayed charge and discharge module is connected to the first input end of the conduction module, and the second output end of the delayed charge and discharge module is grounded;

[0010] The second input end of the conduction module is connected to the first output end of the key switch module, the third input end of the conduction module is used to access the working voltage, the first output end of the conduction module is connected to the start control pin of the target device to be controlled, and the second output end of the conduction module is grounded;

[0011] The second output terminal of the key switch module is grounded;

[0012] The delayed charge and discharge module is used to control the shutdown time and the on time of the conduction module after the supply voltage is connected, so as to adjust the delay time before the start-up of the target device and the start-up time of the target device;

[0013] When the key switch module is triggered, the key is closed to pull down the level of the start control pin, so that the target device is started.

[0014] As an optional implementation, the delayed charge and discharge module includes: a first delayed charge and discharge unit, a delayed discharge unit and a second delayed charge and discharge unit;

[0015] The input end of the first time-delay charge-discharge unit is used to access the power supply voltage, the first output end of the first time-delay charge-discharge unit is connected to the input end of the time-delay discharge unit, and the second output end of the first time-delay charge-discharge unit is grounded;

[0016] The first output end of the delayed discharge unit is connected to the input end of the second delayed charge and discharge unit, and the second output end and the third output end of the delayed discharge unit are grounded;

[0017] The first output end of the second delayed charge and discharge unit is connected to the first input end of the conduction module, and the second output end of the second delayed charge and discharge unit is grounded.

[0018] As an optional implementation, the first delayed charge and discharge unit includes: a first resistor and a first capacitor;

[0019] One end of the first resistor is connected to the supply voltage, and the other end of the first resistor is connected to one end of the first capacitor and the input end of the delayed discharge unit;

[0020] The other end of the first capacitor is grounded.

[0021] As an optional implementation manner, the resistance value of the first resistor and the capacitance value of the first capacitor are determined based on a power-on stability index parameter of the target device.

[0022] As an optional implementation, the delayed discharge unit includes: a second capacitor, a discharge diode and a second resistor;

[0023] One end of the second capacitor is connected to the first output end of the first delayed charge and discharge unit, and the other end of the second capacitor is connected to one end of the discharge diode, one end of the second resistor, and the input end of the second delayed charge and discharge unit;

[0024] The other end of the discharge diode and the other end of the second resistor are grounded.

[0025] As an optional implementation manner, the resistance value of the second resistor and the capacitance value of the second capacitor are determined based on a power-on stability index parameter of the target device.

[0026] As an optional implementation, the second delayed charge and discharge unit includes: a third resistor and a third capacitor;

[0027] One end of the third resistor is connected to the first output end of the delayed discharge unit, and the other end of the third resistor is connected to one end of the third capacitor and the first input end of the conduction module;

[0028] The other end of the third capacitor is grounded.

[0029] As an optional implementation, the conduction module includes: an N-channel metal oxide semiconductor field effect transistor, a fourth resistor, a fourth capacitor and a fifth resistor;

[0030] The gate of the N-channel metal oxide semiconductor field effect transistor is connected to the first output end of the second delayed charge and discharge unit, the drain of the N-channel metal oxide semiconductor field effect transistor is connected to the first output end of the key switch module and one end of the fourth resistor, and the source of the N-channel metal oxide semiconductor field effect transistor is grounded;

[0031] One end of the fifth resistor is connected to the working voltage, and the other end of the fifth resistor is connected to the other end of the fourth resistor, one end of the fourth capacitor, and the start control pin of the target device;

[0032] The other end of the fourth capacitor is grounded.

[0033] As an optional implementation, the key switch module includes: a start key and a bidirectional electrostatic diode;

[0034] One end of the start button is connected to the second input end of the conduction module and one end of the bidirectional electrostatic diode, and the other end of the start button and the other end of the bidirectional electrostatic diode are grounded.

[0035] In a second aspect, an embodiment of the present application provides an electricity consumption system, comprising the power-on startup control circuit and an electrical device described in the first aspect.

[0036] The beneficial effects of this application are:

[0037] The present application provides a power-on start-up control circuit and an electrical device, wherein a delayed charge-discharge module, a conduction module and a key switch module are arranged in the power-on start-up control circuit, wherein the first output end of the delayed charge-discharge module and the first output end of the key switch module are respectively connected to the first input end and the second input end of the conduction module, and the first output end of the conduction module is connected to the start-up control pin of the target device to be controlled. The off-time and on-time of the conduction module are controlled by the charge-discharge process of the delayed charge-discharge module, wherein the off-time of the conduction module is the delay time before the start-up of the target device, and the on-time of the conduction module is the start-up time of the target device, so that the delay time before the start-up of the target device and the start-up time of the target device are adjusted, and it is ensured that the target device automatically starts after power-on is stable. When the key switch module is manually triggered, the key is closed, and the conduction module connected to the key switch module is connected to the ground, thereby pulling down the level of the start-up control pin of the target device, so that the target device is started by the key. It is compatible with the automatic start-up of the target device after power-on is stable and the key triggering start-up of the target device, thereby improving the flexibility of starting the target device and the power-on stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a power-on startup control circuit provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a delayed charge and discharge module of a power-on startup control circuit provided in an embodiment of the present application;

[0041] Figure 3 A schematic structural diagram of a first delayed charge and discharge unit of a delayed charge and discharge module of a power-on startup control circuit provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of the structure of a delayed discharge unit of a delayed charge and discharge module of a power-on startup control circuit provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the structure of a second delayed charge and discharge unit of a power-on startup control circuit provided in an embodiment of the present application;

[0044] Figure 6 A schematic diagram of the structure of a conduction module of a power-on startup control circuit provided in an embodiment of the present application;

[0045] Figure 7 A structural schematic diagram of a key switch module of a power-on start control circuit provided in an embodiment of the present application;

[0046] Figure 8 A schematic diagram of a power-on startup control circuit for adjusting the delay time before startup of a target device provided in an embodiment of the present application;

[0047] Fig. 9 A schematic diagram of adjusting the startup time of a target device by a power-on startup control circuit provided in an embodiment of the present application;

[0048] Fig.10 A schematic diagram of the structure of the power consumption system provided in an embodiment of the present application.

[0049] Figure numerals: delayed charge and discharge module: 11; conduction module: 12; key switch module: 13; first delayed charge and discharge unit: 111; delayed discharge unit: 112; second delayed charge and discharge unit: 113; first resistor: R1; second resistor: R2; third resistor R3; fourth resistor R4; fifth resistor: R5; first capacitor: C1; second capacitor: C2; third capacitor: C3; fourth capacitor: C4; discharge diode: D1; N-MOSFET tube: Q1; start button: K1; bidirectional electrostatic diode: ESD1; start control pin: PWR_KEY. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0052] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of this application, the terms "first", "second", and "third" are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] In the description of this application, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the manufacturing and use of electronic devices such as embedded industrial control motherboards with integrated multi-function modules, the Power-key pin of the electronic device is in a high level state by default. After power-on, the level of the Power-key pin needs to be pulled down to start the device. Currently, the level of the Power-key pin is pulled down through physical switch buttons, microcontroller units, voltage monitoring chips or dedicated power-on startup chips, but it relies on manual intervention or requires complex software support, which has certain limitations.

[0055] Based on the above problems, the embodiment of the present application provides a power-on startup control circuit, including a delayed charge and discharge module, a conduction module and a key switch module. The first delayed charge and discharge unit and the second delayed charge and discharge unit in the delayed charge and discharge module are used to control the off time of the conduction module. Since the conduction module is connected to the start control pin of the target device to be controlled, the delay time before the start of the target device is adjusted. The conduction time of the conduction module is controlled by the delayed discharge unit in the delayed charge and discharge module. The conduction of the conduction module causes the level of the start control pin of the target device to be controlled to be lowered, thereby adjusting the start time of the target device. When the key switch module is triggered, the button is closed, and the level of the start control pin of the target device is lowered, so that the target device starts. The two delayed charge and discharge units are used to realize automatic startup after the power-on of the target device is stable, and the target device can be started by compatible key triggering, thereby improving the power-on stability and flexibility of the target device.

[0056] Figure 1 A schematic diagram of the structure of the power-on startup control circuit provided in the embodiment of the present application is shown in FIG. Figure 1 As shown, the power-on startup control circuit includes: a delayed charge and discharge module 11 , a conduction module 12 and a key switch module 13 .

[0057] Optionally, refer to Figure 1The power-on start control circuit includes three modules, namely a delayed charge and discharge module 11, a conduction module 12 and a key switch module 13.

[0058] The input end of the delayed charge and discharge module 11 is used to access the power supply voltage VCC, the first output end of the delayed charge and discharge module 11 is connected to the first input end of the conduction module 12, and the second output end of the delayed charge and discharge module 11 is grounded.

[0059] Optionally, continue to refer to Figure 1 The time-delay charge-discharge module 11 includes an input terminal and two output terminals, wherein the input terminal of the time-delay charge-discharge module 11 is used to access the power supply voltage VCC, and the power supply voltage VCC supplies power to the power-on start control circuit. Exemplarily, the power supply voltage VCC can be 3.3V. The first output terminal of the time-delay charge-discharge module 11 is connected to the first input terminal of the conduction module 12 to control the turn-off time and the turn-on time of the conduction module 12, and the second output terminal of the time-delay charge-discharge module 11 is grounded.

[0060] The second input end of the conduction module 12 is connected to the first output end of the key switch module 13, the third input end of the conduction module 12 is used to access the working voltage VDD, the first output end of the conduction module 12 is connected to the start control pin PWR_KEY of the target device to be controlled, and the second output end of the conduction module 12 is grounded. The second output end of the key switch module 13 is grounded.

[0061] Optionally, continue to refer to Figure 1 , the conduction module 12 includes three input terminals and two output terminals, wherein the first input terminal of the conduction module 12 is connected to the first output terminal of the delayed charge and discharge module 11, so as to be turned on or off under the control of the delayed charge and discharge module 11. The second input terminal of the conduction module 12 is connected to the first output terminal of the key switch module 13, and the third input terminal of the conduction module 12 is used to access the working voltage VDD. Exemplarily, the working voltage VDD is 1.8V. The second output terminal of the conduction module 12 and the second output terminal of the key switch module 13 are both grounded. When the key switch module 13 is triggered, the key is closed, and the conduction module 12 can be turned on to the ground. The first output terminal of the conduction module 12 is connected to the start control pin PWR_KEY of the target device to be controlled. The default level of the start control pin PWR_KEY of the target device is a high level. When the conduction module 12 is turned on to the ground, the level of the start control pin PWR_KEY of the target device is pulled down from a high level to the ground by the conduction module 12, and the target device can be started.

[0062] The delayed charge and discharge module 11 is used to control the shutdown time and the on time of the conduction module 12 after the power supply voltage VCC is connected, so as to adjust the delay time before the start-up of the target device and the start-up time of the target device.

[0063] Optionally, continue to refer to Figure 1 After the delayed charge and discharge module 11 is connected to the power supply voltage VCC, it controls the off time and on time of the conduction module 12 through the charging process and the discharging process, thereby adjusting the pre-startup delay time and the start-up time of the target device.

[0064] Specifically, when the delayed charge and discharge module 11 is just connected to the power supply voltage VCC, the initial state of the conduction module 12 is the off state, the level of the start control pin PWR_KEY of the target device remains at a high level, and the target device cannot be started. The delayed charge and discharge module 11 changes the state of the conduction module 12 to the on state through the charging process, and the conduction module 12 is connected to the ground, and the level of the start control pin PWR_KEY of the target device is pulled down from a high level to the ground, and the target device is started. The delayed charge and discharge module 11 turns off the conduction module 12 again through the discharging process, and changes from the on state to the off state again. The level of the start control pin PWR_KEY of the target device is pulled up again and becomes a high level, and the target device stops starting, that is, the delay time before starting the target device and the start time of the target device are controlled through the charge and discharge process of the delayed charge and discharge module 11. Among them, the time interval for the conduction module 12 to change from the initial off state to the on state, that is, the initial off duration of the conduction module 12, is used as the delay duration before the startup of the target device, and the time interval for the conduction module 12 to change from the on state to the off state again, that is, the on duration of the conduction module 12, is used as the startup duration of the target device.

[0065] When the key switch module 13 is triggered, the key is closed to pull down the level of the start control pin PWR_KEY so that the target device is started.

[0066] Optionally, when the key switch module 13 is manually triggered, the key is closed. Since the second input terminal of the key switch module 13 is grounded, the conduction module 12 connected to the key switch module 13 is conducted to the ground, thereby pulling the level of the start control pin PWR_KEY of the target device from a high level to the ground, so that the target device starts.

[0067] In this embodiment, a delayed charge and discharge module, a conduction module and a key switch module are set in the power-on start control circuit, and the first output end of the delayed charge and discharge module and the first output end of the key switch module are respectively connected to the first input end and the second input end of the conduction module, and the first output end of the conduction module is connected to the start control pin of the target device to be controlled. The initial off time and the on time of the conduction module are controlled by the charge and discharge process of the delayed charge and discharge module. The initial off time of the conduction module is the delay time before the start of the target device, and the on time of the conduction module is the start time of the target device, so that the delay time before the start of the target device and the start time of the target device are adjusted, ensuring that the target device automatically starts after the power-on is stable. When the key switch module is manually triggered, the key is closed, and the conduction module connected to the key switch module is connected to the ground, thereby pulling down the level of the start control pin of the target device, so that the target device is started by the key. It is compatible with the automatic start of the target device after the power-on is stable and the key triggering start of the target device, which improves the flexibility of starting the target device and the power-on stability.

[0068] Figure 2 A structural diagram of a delayed charge and discharge module of a power-on start control circuit provided in an embodiment of the present application, such as Figure 2 As shown, the delayed charge and discharge module 11 includes: a first delayed charge and discharge unit 111 , a delayed discharge unit 112 and a second delayed charge and discharge unit 113 .

[0069] Optionally, refer to Figure 2 The delayed charge and discharge module 11 includes three units, namely, a first delayed charge and discharge unit 111, a delayed discharge unit 112, and a second delayed charge and discharge unit 113. The first delayed charge and discharge unit 111 and the second delayed charge and discharge unit 113 are used to control the initial shutdown time of the conduction module 12 during the charging process, thereby adjusting the delay time before the start of the target device. The delayed discharge unit 112 is used to control the conduction time of the conduction module 12 during the discharge process, thereby adjusting the start-up time of the target device.

[0070] The input end of the first delayed charge and discharge unit 111 is used to access the power supply voltage VCC, the first output end of the first delayed charge and discharge unit 111 is connected to the input end of the delayed discharge unit 112, and the second output end of the first delayed charge and discharge unit 111 is grounded.

[0071] Optionally, continue to refer to Figure 2The first delayed charge and discharge unit 111 includes an input terminal and two output terminals, wherein the input terminal of the first delayed charge and discharge unit 111 is connected to the power supply voltage VCC, the first output terminal of the first delayed charge and discharge unit 111 is connected to the input terminal of the delayed discharge unit 112, and the second output terminal of the first delayed charge and discharge unit 111 is grounded. The first delayed charge and discharge unit 111 is a first-level delayed charge and discharge unit in the delayed charge and discharge module 11. After being connected to the power supply voltage VCC, the first delayed charge and discharge unit 111 controls the initial shutdown time of the conduction module 12 during the charging process, thereby adjusting the delay time before starting the target device.

[0072] The first output end of the delayed discharge unit 112 is connected to the input end of the second delayed charge and discharge unit 113 , and the second output end and the third output end of the delayed discharge unit 112 are grounded.

[0073] Optionally, continue to refer to Figure 2 The delayed discharge unit 112 includes an input terminal and three output terminals, wherein the input terminal of the delayed discharge unit 112 is connected to the first output terminal of the first delayed charge and discharge unit 111, the first output terminal of the delayed discharge unit 112 is connected to the input terminal of the second delayed charge and discharge unit 113, and the second output terminal of the delayed discharge unit 112 and the third output terminal of the delayed discharge unit 112 are grounded. The delayed discharge unit 112 controls the conduction time of the conduction module 12 to the ground during the discharge process, thereby adjusting the startup time of the target device.

[0074] A first output end of the second delayed charge and discharge unit 13 is connected to a first input end of the conduction module 12 , and a second output end of the second delayed charge and discharge unit 113 is grounded.

[0075] Optionally, continue to refer to Figure 2 The second delayed charge and discharge unit 13 includes an input end and two output ends, wherein the input end of the second delayed charge and discharge unit 13 is connected to the first output end of the delayed discharge unit 112, the first output end of the second delayed charge and discharge unit 13 is connected to the first input end of the conduction module 12, and the second output end of the second delayed charge and discharge unit 113 is grounded. The second delayed charge and discharge unit 13, as a secondary delayed charge and discharge unit in the delayed charge and discharge module 11, controls the initial shutdown time of the conduction module 12 during the charging process, thereby adjusting the delay time before the start of the target device.

[0076] In this embodiment, a first delayed charge and discharge unit, a delayed discharge unit, and a second delayed charge and discharge unit are provided in the delayed charge and discharge module, and the first delayed charge and discharge unit is used as a first-level delayed charge and discharge unit in the delayed charge and discharge module, and the second delayed charge and discharge unit is used as a second-level delayed charge and discharge unit in the delayed charge and discharge module. The on-time of the conduction module is controlled by the delayed discharge unit during the discharge process, thereby adjusting the start-up time of the target device. The two-level delayed charge and discharge units, the first delayed charge and discharge unit and the second delayed charge and discharge unit, jointly control the initial off-time of the conduction module during the charging process, thereby adjusting the delay time before the start-up of the target device, thereby expanding the adjustment range of the delay time before the start-up of the target device, and improving the universality of the automatic power-on start-up of the target device.

[0077] Figure 3 A structural diagram of a first delayed charge and discharge unit of a delayed charge and discharge module of a power-on startup control circuit provided in an embodiment of the present application, such as Figure 3 As shown, the first delayed charge and discharge unit 111 includes: a first resistor R1 and a first capacitor C1.

[0078] Optionally, refer to Figure 3 The first delayed charge and discharge unit 111 includes a resistor and a capacitor, which are a first resistor R1 and a first capacitor C1 respectively. The first delayed charge and discharge unit 111 is used as a first-level RC delayed charge and discharge unit in the delayed charge and discharge module 11.

[0079] One end of the first resistor R1 is connected to the power supply voltage VCC, and the other end of the first resistor R1 is connected to one end of the first capacitor C1 and the input end of the delayed discharge unit 112. The other end of the first capacitor is grounded.

[0080] Optionally, continue to refer to Figure 3 , one end of the first resistor R1 is used as the input end of the first delayed charge and discharge unit 111 and the input end of the delayed charge and discharge module 11, and is connected to the power supply voltage VCC. The other end of the first resistor R1 is respectively connected to one end of the first capacitor C1 and the input end of the delayed discharge unit 112. The other end of the first capacitor is grounded as the second output end of the first RC delayed charge and discharge unit and the second output end of the RC delayed charge and discharge module. At the moment of power-on of the power-on start control circuit, the power supply voltage VCC charges the first capacitor C1, and the first capacitor C1 and the first resistor R1 form the first delayed charge and discharge unit 111, which is a first-level RC delayed charge and discharge unit in the delayed charge and discharge module 11. By determining the resistance value of the first resistor R1 and the capacitance value of the first capacitor C1 in the first delayed charge and discharge unit 111, the initial shutdown time of the conduction module can be controlled during the charging process, thereby adjusting the delay time before the start of the target device.

[0081] In this embodiment, the first delayed charge and discharge unit includes a first resistor and a first capacitor. The first delayed charge and discharge unit is used as a first-level RC delayed charge and discharge unit in the delayed charge and discharge module. By determining the resistance value of the first resistor and the capacitance value of the first capacitor in the first delayed charge and discharge unit, the initial shutdown duration of the conduction module can be controlled during the charging process, thereby adjusting the delay duration before starting the target device.

[0082] As an optional implementation, the resistance of the first resistor R1 and the capacitance of the first capacitor C1 are determined based on a power-on stability index parameter of the target device.

[0083] Optionally, the power-on stability index parameter of the target device may indicate the target pre-startup delay time of the target device and the target startup time of the target device. Based on the target pre-startup delay time of the target device indicated by the power-on stability index parameter of the target device, the resistance value of the first resistor R1 and the capacitance value of the first capacitor C1 in the first delay charge and discharge unit 111 are determined. Specifically, if the power-on stability index parameter of the target device indicates that the target pre-startup delay time of the target device is long, then the resistance value of the first resistor R1 and the capacitance value of the first capacitor C1 in the first delay charge and discharge unit 111 are determined to be large. For example, increasing the resistance value of the first resistor R1 from 20K to 47K and increasing the capacitance value of the first capacitor C1 from 1uF to 10uF can extend the pre-startup delay time of the target device to reach the target pre-startup delay time of the target device to meet the power-on stability index parameter of the target device.

[0084] The resistance value R1 of the first resistor R1 and the capacitance value C1 of the first capacitor C1 are determined based on the following first RC charging formula:

[0085] t1=R1C1*Ln[(V11-V10) / (V11-Vt1)]

[0086] Among them, t1 is the time constant of the first delayed charge and discharge unit 111, which is used to indicate the charging speed of the first delayed charge and discharge unit 111, R1 is the resistance value of the first resistor R1, C1 is the capacitance value of the first capacitor C1, V11 is the voltage value that the first capacitor C1 can finally be charged to, V10 is the initial voltage value on the first capacitor C1, and Vt1 is the voltage value on the first capacitor C1 at time t1.

[0087] By increasing the resistance R1 of the first resistor R1 and the capacitance C1 of the first capacitor C1 in the first delayed charge and discharge unit 111, the charging time of the first capacitor C1 in the first delayed charge and discharge unit 111 can be extended, thereby extending the initial shutdown time of the conduction module 12, and extending the pre-startup delay time of the target device, satisfying the target pre-startup delay time of the target device indicated by the power-on stability index parameter of the target device, and ensuring the power-on stability of the target device.

[0088] In this embodiment, the resistance value of the first resistor and the capacitance value of the first capacitor in the first delay charge and discharge unit are determined based on the power-on stability index parameter of the target device. By adjusting the resistance value of the first resistor and the capacitance value of the first capacitor, the charging time of the first capacitor in the first delay charge and discharge unit can be adjusted, and then the initial shutdown time of the conduction module can be adjusted, so that the pre-startup delay time of the target device meets the target pre-startup delay time of the target device indicated by the power-on stability index parameter of the target device, thereby ensuring the power-on stability of the target device.

[0089] Figure 4 A structural diagram of a delayed discharge unit of a delayed charge and discharge module of a power-on startup control circuit provided in an embodiment of the present application, such as Figure 4 As shown, the delayed discharge unit 112 includes: a second capacitor C2, a discharge diode D1 and a second resistor R2.

[0090] Optionally, refer to Figure 4 The delayed discharge unit 112 includes a capacitor, a diode and a resistor, which are respectively a second capacitor C2, a discharge diode D1 and a second resistor R2. The delayed discharge unit 112 is a resistor-capacitor discharge unit in the delayed charge and discharge module 11. Among them, the second resistor C2 is a coupling capacitor, the discharge diode D1 is quickly discharged for protection after power failure, and the second resistor R2 is a release resistor.

[0091] One end of the second capacitor C2 is connected to the first output end of the first delayed charge and discharge unit 111, and the other end of the second capacitor C2 is connected to one end of the discharge diode D1, one end of the second resistor R2, and the input end of the second delayed charge and discharge unit 113. The other end of the discharge diode D1 and the other end of the second resistor R2 are grounded.

[0092] Optionally, continue to refer to Figure 4 , one end of the second capacitor C2 is used as the input end of the delayed discharge unit 112, connected to the first output end of the first delayed charge and discharge unit 111, and the other end of the second capacitor C2 is respectively connected to one end of the discharge diode D1, one end of the second resistor R2 and the input end of the second delayed charge and discharge unit 113. The other end of the discharge diode D1 and the other end of the second resistor R2 are grounded. When the power-on startup control circuit is powered off, the polarity of the second capacitor C2 is reversed to generate a large reverse voltage, which is quickly discharged through the discharge diode D1 to protect the conduction module 12 from being damaged. By determining the resistance value of the second resistor R2 and the capacitance value of the second capacitor C2 in the delayed discharge unit 112, the conduction time of the conduction module can be controlled during the discharge process, thereby adjusting the startup time of the target device.

[0093] In this embodiment, the delayed discharge unit includes a second capacitor, a discharge diode and a second resistor. The discharge diode quickly discharges and protects the conduction module from being damaged when the power-on startup control circuit is powered off. By determining the resistance value of the second resistor and the capacitance value of the second capacitor in the delayed discharge unit, the conduction time of the conduction module can be controlled during the discharge process, thereby adjusting the startup time of the target device.

[0094] As an optional implementation, the resistance of the second resistor R2 and the capacitance of the second capacitor C2 are determined based on a power-on stability index parameter of the target device.

[0095] Optionally, based on the target startup time of the target device indicated by the power-on stability index parameter of the target device, the resistance value of the second resistor R2 and the capacitance value of the second capacitor C2 in the delayed discharge unit 112 are determined. Specifically, if the power-on stability index parameter of the target device indicates that the target startup time of the target device is long, it is determined that the resistance value of the second resistor R2 and the capacitance value of the second capacitor C2 in the delayed discharge unit 112 are both large, for example, the resistance value of the second resistor R2 is increased from 56K to 100K, and the capacitance value of the second capacitor C2 is increased from 10uF to 22uF, which can extend the startup time of the target device to reach the target startup time of the target device, so as to meet the power-on stability index parameter of the target device.

[0096] The resistance value R2 of the second resistor R2 and the capacitance value C2 of the second capacitor C2 are determined based on the following RC discharge formula:

[0097] t2=R2C2*Ln[(V20-V21) / (Vt2-V21)]

[0098] Among them, t2 is the time constant of the delayed discharge unit 112, which is used to indicate the discharge speed of the delayed discharge unit 112, R2 is the resistance value of the second resistor R2, C2 is the capacitance value of the second capacitor C2, V21 is the voltage value that the second capacitor C2 can finally be discharged to, V20 is the initial voltage value on the second capacitor C2, and Vt2 is the voltage value on the second capacitor C2 at time t2.

[0099] By increasing the resistance R2 of the second resistor R2 and the capacitance C2 of the second capacitor C2 in the delayed discharge unit 112, the discharge time of the second capacitor C2 in the delayed discharge unit 112 can be extended, thereby extending the conduction time of the conduction module 12, so that the startup time of the target device is extended, meeting the target startup time of the target device indicated by the power-on stability index parameter of the target device, and ensuring the power-on stability of the target device.

[0100] In this embodiment, the resistance value of the second resistor and the capacitance value of the second capacitor in the delayed discharge unit are determined based on the power-on stability index parameter of the target device. By adjusting the resistance value of the second resistor and the capacitance value of the second capacitor, the discharge time of the second capacitor in the delayed discharge unit can be adjusted, and then the conduction time of the conduction module can be adjusted, so that the startup time of the target device meets the target startup time of the target device indicated by the power-on stability index parameter of the target device, thereby ensuring the power-on stability of the target device.

[0101] Figure 5 A schematic diagram of the structure of the second delayed charge and discharge unit of the power-on startup control circuit provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the second delayed charge and discharge unit 113 includes: a third resistor R3 and a third capacitor C3.

[0102] Optionally, refer to Figure 5 The second delayed charge and discharge unit 113 includes a resistor and a capacitor, which are a third resistor R3 and a third capacitor C3 respectively. The second delayed charge and discharge unit 113 is used as a secondary RC delayed charge and discharge unit in the delayed charge and discharge module 11.

[0103] One end of the third resistor R3 is connected to the first output end of the delayed discharge unit 112, and the other end of the third resistor R3 is connected to one end of the third capacitor C3 and the first input end of the conduction module 12. The other end of the third capacitor C3 is grounded.

[0104] Optionally, continue to refer to Figure 5 , one end of the third resistor R3 is used as the input end of the second delayed charge and discharge unit 113, and is connected to the first output end of the delayed discharge unit 112. The other end of the third resistor R3 is respectively connected to one end of the third capacitor C3 and the first input end of the conduction module 12, and the other end of the third capacitor C3 is grounded. The second delayed charge and discharge unit 113 composed of the third capacitor C3 and the third resistor R3 is used as a secondary RC delayed charge and discharge unit in the delayed charge and discharge module 11. By determining the resistance value of the third resistor R3 and the capacitance value of the third capacitor C3 in the second delayed charge and discharge unit 113, the initial shutdown time of the conduction module can be controlled during the charging process, thereby adjusting the delay time before the start of the target device. Among them, the voltage across the third capacitor C3 can control the conduction time of the conduction module 12. When the voltage across the third capacitor C3 meets the conduction condition of the conduction module 12 when charging the third capacitor C3, the conduction module 12 is turned on, and the target device starts to start, so as to adjust the delay time before the start of the target device.

[0105] In this embodiment, the second delayed charge and discharge unit includes a third resistor and a third capacitor. The second delayed charge and discharge unit is used as a secondary RC delayed charge and discharge module in the delayed charge and discharge module. By determining the resistance value of the third resistor and the capacitance value of the third capacitor in the second delayed charge and discharge module, the initial shutdown duration of the conduction module is jointly controlled with the first delayed charge and discharge unit during the charging process, thereby adjusting the delay duration before starting the target device.

[0106] The resistance value of the third resistor R3 and the capacitance value of the third capacitor C3 are determined based on the power-on stability index parameter of the target device.

[0107] Optionally, based on the target pre-startup delay time of the target device indicated by the power-on stability index parameter of the target device, the resistance value of the third resistor R3 and the capacitance value of the third capacitor C3 in the second delay charge and discharge unit 113 are determined. Specifically, if the power-on stability index parameter of the target device indicates that the target pre-startup delay time of the target device is long, it is determined that the resistance value of the third resistor R3 and the capacitance value of the third capacitor C3 in the second delay charge and discharge unit 113 are both large, for example, the resistance value of the third resistor R3 is increased from 47K to 100K, and the capacitance value of the third capacitor C3 is increased from 2.2uF to 4.7uF, which can extend the pre-startup delay time of the target device to reach the target pre-startup delay time of the target device, so as to meet the power-on stability index parameter of the target device.

[0108] The resistance value R3 of the third resistor R3 and the capacitance value C3 of the third capacitor C3 are determined based on the following second RC charging formula:

[0109] t3=R3C3*Ln[(V31-V30) / (V31-Vt3)]

[0110] Among them, t3 is the time constant of the second delayed charge and discharge unit 113, which is used to indicate the charging speed of the second delayed charge and discharge unit 113, R3 is the resistance value of the third resistor R3, C3 is the capacitance value C3 of the third capacitor C3, V31 is the voltage value that the third capacitor C3 can finally be charged to, V30 is the initial voltage value on the third capacitor C3, and Vt3 is the voltage value on the third capacitor C3 at time t3.

[0111] By increasing the resistance R3 of the third resistor R3 and the capacitance C3 of the third capacitor C3 in the second delayed charge and discharge unit 113, the charging time of the third capacitor C3 in the second delayed charge and discharge unit 113 can be extended, thereby extending the initial shutdown time of the conduction module 12, and extending the delay time before the start-up of the target device, satisfying the target start-up delay time before the target device indicated by the power-on stability index parameter of the target device, and ensuring the power-on stability of the target device.

[0112] Among them, the adjustment directions of the resistance R1 of the first resistor R1 and the capacitance C1 of the first capacitor C1 in the first delayed charge and discharge unit 111, the resistance R3 of the third resistor R3 and the capacitance C3 of the third capacitor C3 in the second delayed charge and discharge unit 113, and the resistance R2 of the second resistor R2 and the capacitance C2 of the second capacitor C2 in the delayed discharge unit 112 can be consistent, and the adjustment directions include increasing the resistance and capacitance and decreasing the resistance and capacitance to extend the pre-startup delay time and the startup time of the target device to a greater extent or shorten the pre-startup delay time and the startup time of the target device to a greater extent.

[0113] Figure 6 A schematic diagram of the structure of the conduction module of the power-on start-up control circuit provided in the embodiment of the present application, such as Figure 6 As shown, the conduction module 12 includes: an N-MOSFET tube Q1, a fourth resistor R4, a fourth capacitor C4 and a fifth resistor R5.

[0114] Optionally, refer to Figure 6 The conduction module 12 includes a controllable switch device N-MOSFET tube, two resistors and a capacitor, which are N-MOSFET tube Q1, a fourth resistor R4, a fourth capacitor C4 and a fifth resistor R5.

[0115] The gate of the N-MOSFET tube Q1 is connected to the first output end of the second delayed charge and discharge unit 113, the drain of the N-MOSFET tube Q1 is connected to the first output end of the key switch module 13 and one end of the fourth resistor R4, and the source of the N-MOSFET tube Q1 is grounded.

[0116] Optionally, continue to refer to Figure 6 , the gate of the N-MOSFET tube Q1 is used as the first input end of the conduction module 12, connected to the first output end of the second delayed charge and discharge unit 113, the drain of the N-MOSFET tube Q1 is respectively connected to the first output end of the key switch module 13 and one end of the fourth resistor R4, and the source of the N-MOSFET tube Q1 is grounded. When the threshold voltage Vgs of the N-MOSFET tube Q1 reaches the preset voltage, the N-MOSFET tube Q1 is turned on to the ground. Exemplarily, the threshold voltage Vgs of the N-MOSFET tube Q1 can be 0.45V. The threshold voltage Vgs of the N-MOSFET tube Q1 is the voltage across the third capacitor C3 in the second delayed charge and discharge unit 113. During the charging process, when the voltage across the third capacitor C3 is greater than or equal to 0.45V, that is, Vgs≥0.45V, the drain and source of the N-MOSFET tube Q1 are turned on to the ground. During the discharging process, when the voltage across the third capacitor C3 is less than 0.45V, that is, Vgs<0.45V, the N-MOSFET tube Q1 is turned off.

[0117] One end of the fifth resistor R5 is connected to the working voltage VDD, and the other end of the fifth resistor R5 is connected to the other end of the fourth resistor R4, one end of the fourth capacitor C4 and the start control pin PWR_KEY of the target device. The other end of the fourth capacitor C4 is grounded.

[0118] Optionally, continue to refer to Figure 6 , the fifth resistor R5 is a pull-up resistor, and one end of the fifth resistor R5 is used as the third input end of the conduction module 12, and is connected to the working voltage VDD. The other end of the fifth resistor R5 is respectively connected to the other end of the fourth resistor R4, one end of the third capacitor C4 and the start-up control pin PWR_KEY of the target device, and the other end of the fourth capacitor C4 is grounded. Among them, the fourth resistor R4 is a current limiting resistor, and the fourth capacitor C4 is a filter capacitor. When the drain and source of the N-MOSFET tube Q1 are connected to the ground, the start-up control pin PWR_KEY connected to the N-MOSFET tube Q1 through the fourth resistor R4 is pulled down from a high level to the ground, so that the target device is started.

[0119] In this embodiment, an N-MOSFET tube, a fourth resistor, a fifth resistor, and a fourth capacitor are set in the conduction unit. When the threshold voltage of the N-MOSFET tube, that is, the voltage across the third capacitor in the second delayed charge and discharge unit reaches a preset voltage, the drain and source of the N-MOSFET tube are connected to the ground, and the level of the start control pin of the target device is pulled down, so that the target device is started. The threshold voltage of the N-MOSFET tube is controlled by the resistance value of each resistor and the capacitance value of each capacitor in the first delayed charge and discharge module, the delayed discharge module, and the second delayed charge and discharge module in the delayed charge and discharge module, and then the conduction time and the off time of the N-MOSFET tube are controlled to adjust the start time and the delay time before start of the target device.

[0120] Figure 7 The schematic diagram of the structure of the key switch module of the power-on start control circuit provided in the embodiment of the present application is as follows: Figure 7 As shown, the key switch module 13 includes: a start key K1 and a bidirectional electrostatic diode ESD1.

[0121] Optionally, refer to Figure 7 The key switch module 13 includes a start key K1 and a bidirectional electrostatic diode ESD1. The start key K1 is used to close after being manually triggered, and the bidirectional electrostatic diode ESD1 is used for contact electrostatic protection when the start key K1 is manually triggered.

[0122] One end of the start button K1 is connected to the second input end of the conduction module 12 and one end of the bidirectional electrostatic diode ESD1 , and the other end of the start button K1 and the other end of the bidirectional electrostatic diode ESD1 are grounded.

[0123] Optionally, continue to refer to Figure 7 , one end of the start button K1 is connected to the second input end of the conduction module 12 and one end of the bidirectional electrostatic diode ESD1, respectively, and the other end of the start button K1 and the other end of the bidirectional electrostatic diode ESD1 are grounded. When the start button K1 is manually triggered, it is closed, and the conduction module 12 connected to the start button K1 is turned on to the ground, thereby pulling the level of the start control pin PWR_KEY of the target device from a high level to the ground, so that the target device is started.

[0124] In this embodiment, a start button and a bidirectional electrostatic diode are provided in the key switch module. When the start button is manually triggered, it closes, and the conduction module connected to the start button is connected to the ground, thereby pulling the level of the start control pin of the target device from a high level to the ground, so that the target device is started. The key-triggered start of the target device is realized, and the flexibility of starting the target device is improved.

[0125] Figure 8 A schematic diagram of a power-on startup control circuit for adjusting the delay time before startup of a target device provided in an embodiment of the present application, such as Figure 8 As shown, the resistance of the first resistor R1 in the first delayed charge and discharge unit 111 is increased from 20K to 47K, the capacitance of the first capacitor C1 in the first delayed charge and discharge unit 111 is increased from 1uF to 10uF, the resistance of the third resistor R3 in the second delayed charge and discharge unit 113 is increased from 47K to 100K, and the capacitance of the third capacitor C3 in the second delayed charge and discharge unit 113 is increased from 2.2uF to 4.7uF. Through the two-stage RC delayed charge and discharge unit of the delayed charge and discharge module 11, the initial shutdown time of the conduction module 12 is extended, thereby extending the delay time before the start-up of the target device from ta to tb.

[0126] Fig. 9 A schematic diagram of adjusting the startup time of a target device by a power-on startup control circuit provided in an embodiment of the present application, such as Fig. 9 As shown, the resistance of the second resistor R2 in the delayed discharge unit 112 is increased from 56K to 100K, and the capacitance of the second capacitor C2 in the delayed discharge unit 112 is increased from 10uF to 22uF, thereby extending the conduction time of the conduction module 12, and then extending the delay time before starting the target device from tc to td.

[0127] Fig.10 A schematic diagram of the structure of the power system provided in the embodiment of the present application is shown in FIG. Fig.10 As shown, the power system includes the power-on startup control circuit and the power-consuming device described in the above embodiment. The power-on startup control circuit can be connected to the startup control pin PWR_KEY of the power-consuming device. For example, the power-consuming device can be the target device to be controlled in the above embodiment.

[0128] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A power-on start control circuit, It is characterized in that include: Delayed charge and discharge module, conduction module and key switch module; The input end of the delayed charge and discharge module is used to access the power supply voltage, the first output end of the delayed charge and discharge module is connected to the first input end of the conduction module, and the second output end of the delayed charge and discharge module is grounded; The second input end of the conduction module is connected to the first output end of the key switch module, the third input end of the conduction module is used to access the working voltage, the first output end of the conduction module is connected to the start control pin of the target device to be controlled, and the second output end of the conduction module is grounded; The second output terminal of the key switch module is grounded; The delayed charge and discharge module is used to control the shutdown time and the on time of the conduction module after the supply voltage is connected, so as to adjust the delay time before the start-up of the target device and the start-up time of the target device; When the key switch module is triggered, the key is closed to pull down the level of the start control pin, so that the target device is started.

2. The power-on start control circuit according to claim 1, It is characterized in that The delayed charge and discharge module includes: a first delayed charge and discharge unit, a delayed discharge unit and a second delayed charge and discharge unit; The input end of the first time-delay charge-discharge unit is used to access the power supply voltage, the first output end of the first time-delay charge-discharge unit is connected to the input end of the time-delay discharge unit, and the second output end of the first time-delay charge-discharge unit is grounded; The first output end of the delayed discharge unit is connected to the input end of the second delayed charge and discharge unit, and the second output end and the third output end of the delayed discharge unit are grounded; The first output end of the second delayed charge and discharge unit is connected to the first input end of the conduction module, and the second output end of the second delayed charge and discharge unit is grounded.

3. The power-on start control circuit according to claim 2, It is characterized in that The first delayed charge and discharge unit includes: a first resistor and a first capacitor; One end of the first resistor is connected to the supply voltage, and the other end of the first resistor is connected to one end of the first capacitor and the input end of the delayed discharge unit; The other end of the first capacitor is grounded.

4. The power-on start control circuit according to claim 3, It is characterized in that The resistance value of the first resistor and the capacitance value of the first capacitor are determined based on a power-on stability index parameter of the target device.

5. The power-on start control circuit according to claim 2, It is characterized in that The delayed discharge unit includes: a second capacitor, a discharge diode and a second resistor; One end of the second capacitor is connected to the first output end of the first delayed charge and discharge unit, and the other end of the second capacitor is connected to one end of the discharge diode, one end of the second resistor, and the input end of the second delayed charge and discharge unit; The other end of the discharge diode and the other end of the second resistor are grounded.

6. The power-on start control circuit according to claim 5, It is characterized in that The resistance value of the second resistor and the capacitance value of the second capacitor are determined based on a power-on stability index parameter of the target device.

7. The power-on start control circuit according to claim 2, It is characterized in that The second delayed charge and discharge unit includes: a third resistor and a third capacitor; One end of the third resistor is connected to the first output end of the delayed discharge unit, and the other end of the third resistor is connected to one end of the third capacitor and the first input end of the conduction module; The other end of the third capacitor is grounded.

8. The power-on start control circuit according to claim 2, It is characterized in that The conduction module includes: an N-channel metal oxide semiconductor field effect transistor, a fourth resistor, a fourth capacitor and a fifth resistor; The gate of the N-channel metal oxide semiconductor field effect transistor is connected to the first output end of the second delayed charge and discharge unit, the drain of the N-channel metal oxide semiconductor field effect transistor is connected to the first output end of the key switch module and one end of the fourth resistor, and the source of the N-channel metal oxide semiconductor field effect transistor is grounded; One end of the fifth resistor is connected to the working voltage, and the other end of the fifth resistor is connected to the other end of the fourth resistor, one end of the fourth capacitor, and the start control pin of the target device; The other end of the fourth capacitor is grounded.

9. The power-on startup control circuit according to claim 1, It is characterized in that The key switch module includes: a start key and a bidirectional electrostatic diode; One end of the start button is connected to the second input end of the conduction module and one end of the bidirectional electrostatic diode, and the other end of the start button and the other end of the bidirectional electrostatic diode are grounded.

10. An electricity system, It is characterized in that It comprises the power-on startup control circuit and the electrical equipment as described in any one of claims 1 to 9.

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