CN218920399U - Soft shutdown circuit and electronic equipment - Google Patents
Soft shutdown circuit and electronic equipment Download PDFInfo
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- CN218920399U CN218920399U CN202223212269.5U CN202223212269U CN218920399U CN 218920399 U CN218920399 U CN 218920399U CN 202223212269 U CN202223212269 U CN 202223212269U CN 218920399 U CN218920399 U CN 218920399U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The application relates to the field of switches, in particular to a soft shutdown circuit and electronic equipment, wherein the circuit comprises: the device comprises a voltage stabilizing module, a hard switch, a delay switch module and an output switch module; the two ends of the voltage stabilizing module are used for being connected with a power supply, the power supply is used for supplying power to the circuit, the negative electrode of the output end of the voltage stabilizing module is respectively connected with the first end of the hard switch and the ground, the positive electrode of the output end of the voltage stabilizing module is respectively connected with the delay switch module and the output switch module, and the delay switch module is respectively connected with the second end of the hard switch and the output switch module; the delay switch module is used for turning off the output switch module after the hard switch is pressed for a first preset time, so that the whole circuit stops outputting current. According to the method and the device, when the system is in a dead state, the soft switch is turned on by long-time pressing of the hard switch, so that the mechanical shutdown is reset.
Description
Technical Field
The present disclosure relates to the field of switches, and in particular, to a soft shutdown circuit and an electronic device.
Background
With the continuous development of technology, in order to meet various demands of people, artificial intelligence has more and more functions. When the robot needs to be awakened, the MCU needs to start loads corresponding to the functions by standing a horse so as to work. And the switch circuit controlling these functions is particularly important.
The existing switch has two types, the first type is a mechanical switch, and the defects are that the switch charges a capacitor in a circuit at the closing moment to generate large current, so that a switch contact generates spark, and the contact generates carbon deposition in the long time, so that the contact is easy to cause poor contact and cannot be used. The second is that the soft switch solves the surge current impact caused by the mechanical switch, but the problem that the power supply can not be turned off after the system is halted still exists.
Disclosure of Invention
In view of the above, the present application proposes a soft-off circuit and an electronic device.
The embodiment of the application provides a soft shutdown circuit, which comprises: the device comprises a voltage stabilizing module, a hard switch, a delay switch module and an output switch module;
the two ends of the voltage stabilizing module are used for being connected with a power supply, the power supply is used for supplying power to the circuit, the negative electrode of the output end of the voltage stabilizing module is respectively connected with the first end of the hard switch and the ground, the positive electrode of the output end of the voltage stabilizing module is respectively connected with the delay switch module and the output switch module, and the delay switch module is respectively connected with the second end of the hard switch and the output switch module;
the delay switch module is used for turning off the output switch module after the hard switch is pressed for a first preset time, so that the whole circuit stops outputting current.
Further, in the soft-off circuit described above, the delay switch module includes: the first resistor, the second resistor, the third resistor, the first capacitor, the first triode and the second triode;
the first end of the first resistor is connected with the positive electrode of the output end of the voltage stabilizing module, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the second end of the hard switch;
the base electrode of the first triode is connected with the first end of the first capacitor, the emitter electrode of the first triode is respectively connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected with the second end of the first capacitor, the other end of the third resistor is connected with the first end of the first resistor, and the collector electrode of the first triode is connected with the base electrode of the second triode;
the emitter of the second triode is respectively connected with the first end of the first resistor and the output switch module, and the collector of the second triode is connected with the output switch module.
Further, in the soft shutdown circuit, the output switch module includes a fourth resistor and an MOS transistor, a first end of the fourth resistor is connected to the delay switch module and a source electrode of the MOS transistor, a second end of the fourth resistor is connected to the delay switch module and a gate electrode of the MOS transistor, and a drain electrode of the MOS transistor is used for outputting the first electrical signal.
Further, in the soft-off circuit, the soft-off circuit further includes a first detection module, where the first detection module includes a ninth resistor, a tenth resistor, and a fourth capacitor;
the first end of the ninth resistor is connected with the drain electrode of the MOS tube, the second end of the ninth resistor is respectively connected with one end of the tenth resistor and one end of the fourth capacitor, the other end of the tenth resistor is grounded, the other end of the fourth capacitor is grounded, and the second end of the ninth resistor is used for outputting a second electric signal.
Further, in the soft-off circuit described above, the soft-off circuit further includes a second detection module, where the second detection module includes: a first diode and a fifth resistor;
the cathode of the first diode is respectively connected with the delay switch module and the second end of the hard switch, the anode of the first diode is connected with the first end of the fifth resistor, the first end of the fifth resistor is also used for outputting a switch signal, and the second end of the fifth resistor is connected with a supply voltage.
Further, in the soft-off circuit described above, the second detection module is further connected to a microcontroller, where the microcontroller is configured to receive a switching signal sent by the second detection module after the hard switch is continuously pressed for less than a second preset time, and the microcontroller sends a stop/start signal to a connected load according to the switching signal.
Further, in the soft-off circuit, the soft-off circuit further includes a control module, where the control module includes: the second diode, the second capacitor, the sixth resistor, the seventh resistor, the eighth resistor and the third triode;
the negative pole of second diode is connected respectively delay switch module with the second end of hard switch, the positive pole of second diode is connected respectively the one end of seventh resistance with the collecting electrode of third triode, the other end of seventh resistance is connected output switch module, the projecting pole ground connection of third triode, the base of third triode is connected respectively one end of sixth resistance, one end of second electric capacity and one end of eighth resistance, the other end of sixth resistance with the other end of second electric capacity is grounded respectively, the other end of eighth resistance is used for the input third electric signal.
Further, in the soft-off circuit, the voltage stabilizing module includes: the positive pole of zener diode is used for connecting the positive pole of power, the negative pole of zener diode is used for connecting the negative pole of power.
Further, in the soft shutdown circuit, the soft shutdown circuit further comprises a filtering module, wherein the filtering module comprises a third capacitor, and two ends of the third capacitor are correspondingly connected with the positive pole and the negative pole of the power supply respectively.
Another embodiment of the present application further provides an electronic device including the soft-off circuit described above.
The embodiment of the application has the following beneficial effects:
the embodiment of the application provides a soft shutdown circuit, which increases the multiplexing function of a hard switch, and utilizes the hard switch to control the soft switch so as to enable the soft switch to be reset by forced shutdown when a system is dead, and the electronic switch replaces a mechanical switch, so that the startup and shutdown service life of a product is greatly prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are required for the embodiments will be briefly described, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of protection of the present application. Like elements are numbered alike in the various figures.
FIG. 1 illustrates a first block diagram of a soft-off circuit of some embodiments of the present application;
FIG. 2 illustrates a schematic diagram of a soft-off circuit of some embodiments of the present application;
FIG. 3 illustrates a second block diagram of a soft-off circuit of some embodiments of the present application;
FIG. 4 illustrates a third block diagram of a soft-off circuit of some embodiments of the present application;
FIG. 5 illustrates a fourth block diagram of a soft-off circuit of some embodiments of the present application;
fig. 6 illustrates a fifth block diagram of a soft-off circuit according to some embodiments of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
In the following, the terms "comprises", "comprising", "having" and their cognate terms may be used in various embodiments of the present application are intended only to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of this application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is identical to the meaning of the context in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.
In general, in comparison with a mechanical switch, a soft switch has a long service life, but a dead halt phenomenon still occurs in a system, and for the dead halt phenomenon, the existing soft switch cannot reset by turning off a power supply.
Therefore, the present application proposes a soft-off circuit to solve this problem.
Fig. 1 is a schematic diagram of a first module of a soft-off circuit according to an embodiment of the present application. The soft-off circuit is exemplarily applied to an electronic device, for example, the electronic device may be a floor sweeping robot, a sound box, a mobile phone, a computer, etc.
In some embodiments, as shown in fig. 1, the soft-off circuit may include: a voltage stabilizing module 110, a hard switch 120, a delay switch module 130, and an output switch module 140. The two ends of the voltage stabilizing module 110 are used for being connected with a power supply, the negative electrode of the output end of the voltage stabilizing module 110 is respectively connected with the first end of the hard switch 120 and the ground, the positive electrode of the output end of the voltage stabilizing module 110 is respectively connected with the delay switch module 130 and the output switch module 140, and the delay switch module 130 is respectively connected with the second end of the hard switch 120 and the output switch module 140.
Specifically, the power supply is used to power the circuit, while the power supply also provides a current output to the output interface of the output switch module 140. The delay switch module 130 is configured to turn off the output switch module 140 after the hard switch 120 is pressed for a first preset time, so that the output port of the output switch module 140 stops the current output. The first preset time may be 5S to 10S, and of course, may be other times, which is not limited herein.
In some embodiments, as shown in fig. 1-2, the delay switch module 130 includes: the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the first triode Q1 and the second triode Q2. The first end of the first resistor R1 is connected with the positive electrode of the output end of the voltage stabilizing module 110, the second end of the first resistor R1 is connected with the first end of the first capacitor C1, and the second end of the first capacitor C1 is connected with the second end of the hard switch. The base of the first triode Q1 is connected with the first end of the first capacitor C1, the emitter of the first triode Q1 is respectively connected with one end of the second resistor R2 and one end of the third resistor R3, the other end of the second resistor R2 is connected with the second end of the first capacitor C1, the other end of the third resistor R3 is connected with the first end of the first resistor R1, and the collector of the first triode Q1 is connected with the base of the second triode Q2. The emitter of the second triode Q2 is respectively connected with the first end of the first resistor R1 and the output switch module 140, and the collector of the second triode Q2 is connected with the output switch module 140.
Specifically, when the hard switch 120 is pressed, the first capacitor C1 starts to charge, if the hard switch 120 is pressed for a first preset time, the first end potential of the first capacitor C1 makes the first transistor Q1 conduct, the second transistor Q2 conduct after the first transistor Q1 conducts, and the emitter and collector of the second transistor Q2 communicate after the second transistor Q2 conducts, so that a stop current output signal is sent to the output switch module 140.
In some embodiments, as shown in fig. 1 to 2, the output switch module 140 includes a fourth resistor R4 and a MOS transistor Q4, a first end of the fourth resistor R4 is connected to the delay switch module 130 and a source electrode of the MOS transistor Q4, a second end of the fourth resistor R4 is connected to the delay switch module 130 and a gate electrode of the MOS transistor Q4, and a drain electrode of the MOS transistor Q4 is used for outputting the first electrical signal.
Specifically, when the output switch module 140 receives the stop current output signal sent by the delay switch module 130, that is, the gate and the source of the MOS transistor Q4 are shorted, so that the drain of the MOS transistor Q4 cannot be connected to the source, the drain of the MOS transistor Q4 cannot output current, that is, the output port of the output switch module 140 cannot output current, where the first electrical signal includes current. In the present embodiment, the real-time mode of stopping the current output signal sent by the delay switch module 130 is to short-circuit the gate and the source of the MOS transistor Q4, so that the MOS transistor Q4 is turned off, and there are other modes of stopping the current output, which are not limited herein.
In some embodiments, as shown in fig. 2 to 3, the first detection module 150 is further included, and the first detection module 150 includes a ninth resistor R9, a tenth resistor R10, and a fourth capacitor C4. The first end of the ninth resistor R9 is connected with the drain electrode of the MOS tube Q4, the second end of the ninth resistor R9 is respectively connected with one end of the tenth resistor R10 and one end of the fourth capacitor C4, the other end of the tenth resistor R10 is grounded, the other end of the fourth capacitor C4 is grounded, and the second end of the ninth resistor R9 is used for outputting a second electric signal.
Specifically, in order to accurately measure the output current or the output voltage to perform control adjustment according to the measured current or voltage, a detection module is added, where the ninth resistor R9 and the tenth resistor R10 are used in the first detection module 150 to divide the voltage between the output port of the output switch module 140 and the ground, and the voltage of the output port of the output switch module 140 can be measured by detecting the voltage between the ninth resistor R9 and the tenth resistor R10.
Further, a fourth capacitor C4 is present in the first detection module 150 for filtering, so that the output voltage is smoother.
In some real-time modes, as shown in fig. 2 and 4, a second detection module 160 is further included, where the second detection module 160 includes: a first diode D1 and a fifth resistor R5.
The cathode of the first diode D1 is connected to the second ends of the delay switch module 130 and the hard switch 120, respectively, the anode of the first diode D1 is connected to the first end of the fifth resistor R5, the first end of the fifth resistor R5 is further used for outputting a switching signal, and the second end of the fifth resistor R5 is connected to a supply voltage.
Specifically, in order to detect the information that the hard switch 120 is pressed, the second detection module 160 is added to detect, wherein the pressed signal is used as a switching signal, and the switching signal includes whether the switch is pressed and the duration of the pressing. The first diode D1 is used to prevent the current from flowing backward, when the hard switch 120 is pressed, the voltage at the first end of the fifth resistor R5 is pulled down, and when the voltage at the first end of the fifth resistor R5 is detected to be low, it represents that the hard switch 120 is pressed down, and the duration that the voltage at the first end of the fifth resistor R5 is continuously low is the duration that the hard switch 120 is continuously pressed down.
In some embodiments, the second detection module 160 is further connected to a microcontroller, and the microcontroller is configured to receive the switching signal sent by the second detection module 160 when the hard switch 120 is continuously pressed for less than the second preset time, and the microcontroller sends a stop/start signal to the connected load according to the switching signal.
Specifically, when the hard switch 120 is continuously pressed and the duration is less than the second preset time, the microcontroller receives a stop/start signal. Wherein the second preset time is shorter than the first preset time, and the second preset time is hereinafter referred to as a short press. When the load is in operation, the microcontroller begins to detect the signal of the hard switch 120, and when a first short press is detected, it is representative to stop operation until a second short press is detected, and it is representative to continue operation. Alternatively, the second preset time may be 1s, but may be other time, such as 0.5s to 1s, and the like, which is not limited herein.
Further, as shown in fig. 2 and 5, the above circuit further includes a control module 170, where the control module 170 includes: the second diode D2, the second capacitor C2, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8 and the third triode Q3.
The cathode of the second diode D2 is connected to the delay switch module 130 and the second end of the hard switch 120 respectively, the anode of the second diode D2 is connected to one end of the seventh resistor R7 and the collector of the third triode Q3 respectively, the other end of the seventh resistor R7 is connected to the output switch module 140, the emitter of the third triode Q3 is grounded, the base of the third triode Q3 is connected to one end of the sixth resistor R6, one end of the second capacitor C2 and one end of the eighth resistor R8 respectively, the other end of the sixth resistor R6 and the other end of the second capacitor C2 are grounded respectively, and the other end of the eighth resistor R8 is used for inputting a third electrical signal.
Specifically, in the present embodiment, with the hard switch 120 mentioned above, a plurality of functions can be realized, including the power on and power off functions:
in the power-on process, when the hard switch 120 is pressed for a third preset time, the MOS transistor Q4 is turned on, wherein the MOS transistor Q4 is turned on through the hard branch. The hard switch 120, the second diode D2, the seventh resistor R7 and the fourth resistor R4 form a hard branch. When the hard switch 120 is pressed for a third preset time, the second detection module 160 also detects the pressed information, so in consideration of that the hard switch 120 cannot be pressed all the time, in order to ensure that the MOS transistor Q4 is continuously turned on, that is, the output switch module 140 continuously outputs current, the third transistor Q3 in the control module 170 is turned on, and the MOS transistor Q4 is turned on through the soft branch. The fourth resistor R4, the seventh resistor R7 and the third transistor Q3 form a soft branch. The second diode D2 is used to prevent backflow. The third preset time is greater than the second preset time and less than the first preset time. Namely, the start-up key time is longer than the short time and shorter than the time pressed by forced shutdown. For example, the duration of the pressing time required for starting is 1-3S, and of course, other times may be used, which are required according to the specific situation, and are not limited herein.
Further, in order to prevent the overload, it is necessary to reduce the speed of switching on the MOS transistor Q4 by the soft branch, and an RC circuit is added, and in this embodiment, the RC circuit is composed of the second capacitor C2 and the eighth resistor R8.
Further, in order to stabilize the voltage at the moment when the third transistor Q3 is turned on, a pull-down resistor is connected to the base of the third transistor Q3.
In the shutdown process, when the hard switch 120 is pressed for a fourth preset time in the startup process, the second detection module 160 detects a shutdown signal, and the control module 170 turns off the third transistor Q3, so that the second transistor Q2 is turned off, and the output of the current is stopped. The fourth preset time is greater than the second preset time and less than the first preset time. Namely, the time of the shutdown key is longer than the short time and shorter than the time pressed when the forced shutdown is performed.
In some embodiments, as shown in fig. 1 to 2, the voltage stabilizing module 110 includes: the positive pole of zener diode ZD is used for connecting the positive pole of power, and the negative pole of zener diode ZD is used for connecting the negative pole of power.
Specifically, the voltage stabilizing module 110 is used for stabilizing the voltage of the power supply. The voltage stabilizing module 110 in this embodiment uses only one zener diode ZD, but of course, other disclosed voltage stabilizing circuits may be used, which is not limited herein.
In some embodiments, as shown in fig. 2 and 6, the filter module 180 further includes a third capacitor C3, where two ends of the third capacitor C3 are respectively connected to an anode and a cathode of the power supply correspondingly.
Specifically, the filtering module 180 is to make the voltage of the power supply to be connected to be smoother. The filter module 180 in this embodiment uses only the third capacitor C3, but of course, other disclosed filter circuits may be used, which is not limited herein.
The embodiment of the application provides a soft shutdown circuit, which increases the multiplexing function of a hard switch 120, and utilizes the hard switch 120 to control the soft switch so as to enable the soft switch to be reset by forced shutdown when the system is dead, and the electronic switch replaces a mechanical switch, thereby greatly prolonging the startup and shutdown life of the product. In addition, the first detection module 150 is further added to detect the output voltage of the output switch module 140, the second detection module 160 is further added to detect the pressed information of the hard switch 120, and the control module 170 is further added to control the turn-off of the whole circuit. In this application, the hard switch 120 has multiple functions, not only to force shutdown, power on and shutdown, but also to transmit a signal to the connected microcontroller to temporarily stop/continue operation.
Another embodiment of the present application further provides an electronic device including the soft-off circuit described above.
Specifically, the electronic device includes the soft-off circuit in any of the above embodiments or implementations, and the electronic device may be any robot, stereo, mobile phone, computer, desk lamp, etc., which is not limited herein.
It will be appreciated that the circuit structure and method of the present embodiment correspond to those of the soft-off circuit in the above embodiment, and that the options of the soft-off circuit described above are equally applicable to the present embodiment and will not be repeated here.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners as well. The apparatus embodiments described above are merely illustrative, for example, of the flow diagrams and block diagrams in the figures, which illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules or units in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application.
Claims (10)
1. A soft-off circuit, comprising: the device comprises a voltage stabilizing module, a hard switch, a delay switch module and an output switch module;
the two ends of the voltage stabilizing module are used for being connected with a power supply, the power supply is used for supplying power to the circuit, the negative electrode of the output end of the voltage stabilizing module is respectively connected with the first end of the hard switch and the ground, the positive electrode of the output end of the voltage stabilizing module is respectively connected with the delay switch module and the output switch module, and the delay switch module is respectively connected with the second end of the hard switch and the output switch module;
the delay switch module is used for turning off the output switch module after the hard switch is pressed for a first preset time, so that the whole circuit stops outputting current.
2. The soft-off circuit of claim 1, wherein the delay switch module comprises: the first resistor, the second resistor, the third resistor, the first capacitor, the first triode and the second triode;
the first end of the first resistor is connected with the positive electrode of the output end of the voltage stabilizing module, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the second end of the hard switch;
the base electrode of the first triode is connected with the first end of the first capacitor, the emitter electrode of the first triode is respectively connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected with the second end of the first capacitor, the other end of the third resistor is connected with the first end of the first resistor, and the collector electrode of the first triode is connected with the base electrode of the second triode;
the emitter of the second triode is respectively connected with the first end of the first resistor and the output switch module, and the collector of the second triode is connected with the output switch module.
3. The soft-off circuit of claim 1, wherein the output switch module comprises a fourth resistor and a MOS transistor, a first end of the fourth resistor is connected to the delay switch module and a source electrode of the MOS transistor, a second end of the fourth resistor is connected to the delay switch module and a gate electrode of the MOS transistor, and a drain electrode of the MOS transistor is used for outputting the first electrical signal.
4. A soft-off circuit according to claim 3, further comprising a first detection module comprising a ninth resistor, a tenth resistor, and a fourth capacitor;
the first end of the ninth resistor is connected with the drain electrode of the MOS tube, the second end of the ninth resistor is respectively connected with one end of the tenth resistor and one end of the fourth capacitor, the other end of the tenth resistor is grounded, the other end of the fourth capacitor is grounded, and the second end of the ninth resistor is used for outputting a second electric signal.
5. The soft-off circuit of claim 1, further comprising a second detection module, the second detection module comprising: a first diode and a fifth resistor;
the cathode of the first diode is respectively connected with the delay switch module and the second end of the hard switch, the anode of the first diode is connected with the first end of the fifth resistor, the first end of the fifth resistor is also used for outputting a switch signal, and the second end of the fifth resistor is connected with a supply voltage.
6. The soft-off circuit of claim 5, wherein the second detection module is further coupled to a microcontroller for receiving a switching signal from the second detection module when the hard switch is continuously depressed for less than a second predetermined time, the microcontroller sending a stop/start signal to a coupled load based on the switching signal.
7. The soft-off circuit of any of claims 1-6, further comprising a control module, the control module comprising: the second diode, the second capacitor, the sixth resistor, the seventh resistor, the eighth resistor and the third triode;
the negative pole of second diode is connected respectively delay switch module with the second end of hard switch, the positive pole of second diode is connected respectively the one end of seventh resistance with the collecting electrode of third triode, the other end of seventh resistance is connected output switch module, the projecting pole ground connection of third triode, the base of third triode is connected respectively one end of sixth resistance, one end of second electric capacity and one end of eighth resistance, the other end of sixth resistance with the other end of second electric capacity is grounded respectively, the other end of eighth resistance is used for the input third electric signal.
8. The soft-off circuit of any of claims 1-6, wherein the voltage regulator module comprises: the positive pole of zener diode is used for connecting the positive pole of power, the negative pole of zener diode is used for connecting the negative pole of power.
9. The soft-off circuit of any of claims 1-6, further comprising a filtering module, the filtering module comprising a third capacitor, two ends of the third capacitor being respectively connected to the positive pole and the negative pole of the power supply.
10. An electronic device comprising a soft-off circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223212269.5U CN218920399U (en) | 2022-11-30 | 2022-11-30 | Soft shutdown circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223212269.5U CN218920399U (en) | 2022-11-30 | 2022-11-30 | Soft shutdown circuit and electronic equipment |
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| CN218920399U true CN218920399U (en) | 2023-04-25 |
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| CN202223212269.5U Active CN218920399U (en) | 2022-11-30 | 2022-11-30 | Soft shutdown circuit and electronic equipment |
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