CN112202434A - Startup and shutdown self-locking circuit - Google Patents
Startup and shutdown self-locking circuit Download PDFInfo
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- CN112202434A CN112202434A CN202011263036.0A CN202011263036A CN112202434A CN 112202434 A CN112202434 A CN 112202434A CN 202011263036 A CN202011263036 A CN 202011263036A CN 112202434 A CN112202434 A CN 112202434A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
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Abstract
The invention discloses a startup and shutdown self-locking circuit, which comprises: the power supply comprises a power on-off module, a power supply conversion module and a control module, wherein the power on-off module is used for receiving an externally triggered power on signal or power off signal and providing voltage for the power supply conversion module; the power supply conversion module is used for converting the voltage of the power supply conversion module and then providing a power supply for the control module; after the control module is powered on, immediately sending a first trigger signal to the power on/off module according to the power on signal or the power off signal, sending a second trigger signal to the power on/off module after preset time, and controlling the power on/off self-locking of the power on/off module by using the first trigger signal and the second trigger signal; the on-off self-locking circuit disclosed by the invention is simple in design, small in occupied resource, safe and reliable, and effectively prevents false triggering.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a power on/off self-locking circuit.
Background
The switching circuit is a circuit with two states of 'on' and 'off', has higher requirements on the switching circuit in the electronic communication application industry, has more and more extensive application along with the vigorous development of the whole electronic industry and the continuous progress of the electronic technology, and has the problems of complex design, more resource occupation and easy occurrence of error touch of the switching self-locking circuit.
Disclosure of Invention
Therefore, the startup and shutdown self-locking circuit provided by the invention overcomes the defects that the startup and shutdown self-locking circuit in the prior art is complex in design, occupies a large amount of resources and is easy to miss touch.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a power on/off self-locking circuit, including: a switch module, a power supply conversion module and a control module, wherein,
the power supply conversion module is used for converting the power supply voltage into a power supply voltage;
the power supply conversion module is used for converting the voltage of the power supply conversion module and then providing a power supply for the control module;
after the control module is powered on, immediately sending a first trigger signal to the power on/off module according to the power on signal or the power off signal, sending a second trigger signal to the power on/off module after preset time, and controlling the power on/off self-locking of the power on/off module by using the first trigger signal and the second trigger signal;
the power on/off module comprises: a first switch circuit, a second switch circuit, a power supply submodule and a trigger submodule, wherein,
the first switch circuit is used for receiving an externally triggered starting signal or a power-off signal and conducting the power supply sub-module;
the power supply submodule is used for providing voltage for the power supply conversion module;
the trigger submodule is used for receiving a first trigger signal, and the first trigger signal is at a low level;
the second switch circuit is used for receiving a second trigger signal and completing the startup self-locking of the startup and shutdown module when the second trigger signal is at a high level; and when the second trigger signal is at a low level, the shutdown self-locking of the startup and shutdown module is completed.
In one embodiment, the first switching circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, and a first triode,
the power supply end of the first switching circuit is respectively connected with the first end of the first resistor and the emitting electrode of the first triode, and the base electrode of the first triode is respectively connected with the second end of the first resistor, the first end of the second resistor and the first end of the third resistor;
when the first triode is conducted, the base voltage of the first triode is the voltage of the series-parallel connection relation of the first resistor, the second resistor, the third resistor and the fourth resistor.
In one embodiment, the second switching circuit includes: a fifth resistor, a sixth resistor, a capacitor, and a second triode, wherein,
the input end of the second switch circuit receives a second trigger signal and is connected with the first end of the fifth resistor;
the second end of the fifth resistor is respectively connected with the first end of the capacitor, the first end of the sixth resistor and the base electrode of the second triode;
the second end of the capacitor, the second end of the sixth resistor and the emitter of the second triode are simultaneously connected with the grounding end;
and the collector of the second triode is connected with the second end of the second resistor.
In one embodiment, the power-on signal and the power-off signal are signals alternately triggered by the outside.
In one embodiment, the control module is a single chip microcomputer.
The technical scheme of the invention has the following advantages:
the invention provides a power on/off self-locking circuit, which comprises: the power supply comprises a power on-off module, a power supply conversion module and a control module, wherein the power on-off module is used for receiving an externally triggered power on signal or power off signal and providing voltage for the power supply conversion module; the power supply conversion module is used for converting the voltage of the power supply conversion module and then providing a power supply for the control module; after the control module is powered on, immediately sending a first trigger signal to the power on/off module according to the power on signal or the power off signal, sending a second trigger signal to the power on/off module after preset time, and controlling the power on/off self-locking of the power on/off module by using the first trigger signal and the second trigger signal; the on-off self-locking circuit disclosed by the invention is simple in design, small in occupied resource, safe and reliable, and effectively prevents false triggering.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a block diagram of a specific example of a power on/off self-locking circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a specific example of a power conversion module of the power on/off self-locking circuit according to the embodiment of the present invention;
fig. 3 is a circuit diagram of a specific example of a switching module of the switching self-locking circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a specific example of a control module of the power on/off self-locking circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment of the invention provides a power on/off self-locking circuit, which can be applied to the fields of electronic products such as a handheld fluorescence spectrum instrument and the like, and as shown in figure 1, the power on/off self-locking circuit comprises: the power supply comprises a power on-off module, a power supply conversion module and a control module, wherein the power on-off module is used for receiving an externally triggered power on signal or power off signal and providing voltage for the power supply conversion module, and a device of the externally triggered signal can be obtained through a mechanical switch, which is only taken as an example and not limited thereto, and a corresponding trigger device is selected according to actual requirements in actual application; as shown in fig. 2, the power conversion module is configured to convert a voltage of the power conversion module and provide a power source for the control module; the control module immediately sends a first trigger signal to the on-off module according to the starting signal or the shutdown signal after the power is switched on, sends a second trigger signal to the on-off module after preset time, and controls the on-off self-locking or shutdown self-locking of the on-off module by utilizing the first trigger signal and the second trigger signal.
In the embodiment of the present invention, the power on/off module 1, as shown in fig. 3, includes: the power supply module comprises a first switch circuit 11, a second switch circuit 12, a power supply submodule 13 and a trigger submodule 14, wherein the first switch circuit 11 is used for receiving an external trigger signal module 15 (a starting signal or a shutdown signal) and conducting the power supply submodule 13; the power supply submodule 13 is used for providing voltage for the power supply conversion module 2; the trigger submodule 14 is configured to receive a first trigger signal, where the first trigger signal is at a low level; the second switch circuit 12 is configured to receive a second trigger signal, and complete power-on self-locking of the power-on/off module 1 when the second trigger signal is at a high level; when the second trigger signal is at a low level, the shutdown self-locking of the power on/off module 1 is completed.
In the embodiment of the present invention, as shown in fig. 3, the first switch circuit 11 includes: the circuit comprises a first resistor R308, a second resistor R307, a third resistor R309, a fourth resistor R1 and a first triode Q12, wherein the power supply end of the first switch circuit 11 is respectively connected with the first end of the first resistor R308 and the emitter of a first triode Q12, and the base of the first triode Q12 is respectively connected with the second end of the first resistor R308, the first end of the second resistor R307 and the first end of the third resistor R309; when the first transistor Q12 is turned on, the base voltage is the voltage of the series-parallel relationship among the first resistor R308, the second resistor R307, the third resistor R309, and the fourth resistor R1.
In the embodiment of the present invention, as shown in fig. 3, the second switch circuit 12 includes: a fifth resistor R305, a sixth resistor R306, a capacitor C198, and a second transistor Q13, wherein an input terminal of the second switch circuit 12 receives a second trigger signal, and is connected to a first terminal of the fifth resistor R305; a second end of the fifth resistor R305 is connected to the first end of the capacitor C198, the first end of the sixth resistor R306, and the base of the second transistor Q13, respectively; the second end of the capacitor C198, the second end of the sixth resistor R306 and the emitter of the second triode Q13 are simultaneously connected with the ground terminal; the collector of the second transistor Q13 is connected to the second terminal of the second resistor R307.
In the embodiment of the present invention, as shown in fig. 3, the power-on signal and the power-off signal may be received by the module 15 for receiving an external trigger signal, where the signal is a signal triggered alternately by the outside, that is, the power-on signal and the power-off signal are triggered alternately.
In the embodiment of the present invention, as shown in fig. 4, the control module 2 is a single chip, and a single chip control circuit is adopted to complete the self-locking action of the startup and shutdown.
In the embodiment of the invention, the on-off self-locking circuit works as follows:
IN one embodiment, as shown IN fig. 3, IN the external trigger signal receiving module 15, when the power supply J18 is not pressed, the power supply BAT _ IN has no loop, the base Vb and emitter Ve voltages of Q12 are approximately equal, and Q12 is not conductive, so that the pin V5 of U16 has no voltage output. When a J18 start-up button is pressed, one end of R309 is grounded, a power supply BAT _ IN forms a loop through R308 and R309, a base Vb of a triode Q12 is larger than an emitter Ve after passing through voltage dividing resistors R308 and R309, the triode Q12 is conducted, therefore, the input voltage obtained by U16 is BAT _ IN, the whole U16 works normally, and therefore the pin V5 of U16 outputs voltage.
As shown in fig. 2, the pin V5 is controlled by the enable pin of U22, when the pin V5 has a voltage, the U22 operates normally, the output voltage supplies power to the whole system through the pin V5D, and at this time, the single chip microcomputer in fig. 4 starts to operate.
As shown in fig. 3 and 4, the pin POWER _ ON of the single chip microcomputer is connected to the key J18 through the diode D17 of the trigger submodule 14, when the key J18 is pressed, the low level is set, the single chip microcomputer program starts to time, after 5 seconds of timing, the time setting is not limited, the setting is performed according to the requirement, at this time, the pin K _ OUT of the single chip microcomputer outputs the high level, the high level is transmitted to the control triode Q13 through the pin K _ OUT through the resistor R305, and therefore, one end of the resistor R307 is close to the ground, and a current loop is formed. Therefore, the voltage of the base Vb of the triode Q12 at this time is the voltage of the series-parallel connection of the four resistors R308, R309, R307 and R1, and when the key J18 is released and the J18 is disconnected, the voltage Vb of the base of the triode Q12 is the divided voltage of the resistor R308 and the resistor R307 and is lower than BAT _ IN. Therefore, the triode Q12 is conducted, the U16 has output voltage, the U22 works normally, the power supply of the whole system is normal, and the self-locking starting process of the single chip microcomputer is realized.
When the J18 is pressed again to provide a shutdown signal, the singlechip starts timing according to the process, the pin K _ OUT of the singlechip outputs a low level after 5 seconds, the triode Q13 is closed, when the J18 is released, the power BAT _ IN has no loop and returns to an original state, and the self-locking shutdown process is realized when the whole circuit is powered off.
The power on/off self-locking circuit provided by the embodiment of the invention comprises: the power supply comprises a power on-off module, a power supply conversion module and a control module, wherein the power on-off module is used for receiving an externally triggered power on signal or power off signal and providing voltage for the power supply conversion module; the power supply conversion module is used for converting the voltage of the power supply conversion module and then providing a power supply for the control module; after the control module is powered on, immediately sending a first trigger signal to the power on/off module according to the power on signal or the power off signal, sending a second trigger signal to the power on/off module after preset time, and controlling the power on/off self-locking of the power on/off module by using the first trigger signal and the second trigger signal; the on-off self-locking circuit disclosed by the invention is simple in design, small in occupied resource, safe and reliable, and effectively prevents false triggering.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (5)
1. A power on/off self-locking circuit is characterized by comprising: a switch module, a power supply conversion module and a control module, wherein,
the power supply conversion module is used for converting the power supply voltage into a power supply voltage;
the power supply conversion module is used for converting the voltage of the power supply conversion module and then providing a power supply for the control module;
after the control module is powered on, immediately sending a first trigger signal to the power on/off module according to the power on signal or the power off signal, sending a second trigger signal to the power on/off module after preset time, and controlling the power on/off self-locking of the power on/off module by using the first trigger signal and the second trigger signal;
the power on/off module comprises: a first switch circuit, a second switch circuit, a power supply submodule and a trigger submodule, wherein,
the first switch circuit is used for receiving an externally triggered starting signal or a power-off signal and conducting the power supply sub-module;
the power supply submodule is used for providing voltage for the power supply conversion module;
the trigger submodule is used for receiving a first trigger signal, and the first trigger signal is at a low level;
the second switch circuit is used for receiving a second trigger signal and completing the startup self-locking of the startup and shutdown module when the second trigger signal is at a high level; and when the second trigger signal is at a low level, the shutdown self-locking of the startup and shutdown module is completed.
2. The power on/off self-locking circuit according to claim 1, wherein the first switching circuit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, and a first triode,
the power supply end of the first switching circuit is respectively connected with the first end of the first resistor and the emitting electrode of the first triode, and the base electrode of the first triode is respectively connected with the second end of the first resistor, the first end of the second resistor and the first end of the third resistor;
when the first triode is conducted, the base voltage of the first triode is the voltage of the series-parallel connection relation of the first resistor, the second resistor, the third resistor and the fourth resistor.
3. The power on/off self-locking circuit according to claim 2, wherein the second switching circuit comprises: a fifth resistor, a sixth resistor, a capacitor, and a second triode, wherein,
the input end of the second switch circuit receives a second trigger signal and is connected with the first end of the fifth resistor;
the second end of the fifth resistor is respectively connected with the first end of the capacitor, the first end of the sixth resistor and the base electrode of the second triode;
the second end of the capacitor, the second end of the sixth resistor and the emitter of the second triode are simultaneously connected with the grounding end;
and the collector of the second triode is connected with the second end of the second resistor.
4. The power on/off self-locking circuit according to claim 1, wherein the power on signal and the power off signal are signals alternately triggered from the outside.
5. The power on/off self-locking circuit according to claim 1, wherein the control module is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011263036.0A CN112202434A (en) | 2020-11-12 | 2020-11-12 | Startup and shutdown self-locking circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011263036.0A CN112202434A (en) | 2020-11-12 | 2020-11-12 | Startup and shutdown self-locking circuit |
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| CN112202434A true CN112202434A (en) | 2021-01-08 |
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| CN202011263036.0A Pending CN112202434A (en) | 2020-11-12 | 2020-11-12 | Startup and shutdown self-locking circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115291661A (en) * | 2022-07-08 | 2022-11-04 | 广东天波信息技术股份有限公司 | Low-power-consumption standby circuit and control method thereof |
-
2020
- 2020-11-12 CN CN202011263036.0A patent/CN112202434A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115291661A (en) * | 2022-07-08 | 2022-11-04 | 广东天波信息技术股份有限公司 | Low-power-consumption standby circuit and control method thereof |
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