CN211236841U - Hardware circuit capable of automatically switching power supply - Google Patents
Hardware circuit capable of automatically switching power supply Download PDFInfo
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- CN211236841U CN211236841U CN201922116862.1U CN201922116862U CN211236841U CN 211236841 U CN211236841 U CN 211236841U CN 201922116862 U CN201922116862 U CN 201922116862U CN 211236841 U CN211236841 U CN 211236841U
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Abstract
The utility model discloses a hardware circuit for automatically switching power supply, which comprises a first power connection port, a starting power supply module, a second power connection port, a shutdown power supply module and a power supply interface; the startup power supply module comprises a low dropout linear regulator U1 and a diode D1 which are connected in series, wherein the input end of the low dropout linear regulator U1 is connected with the first power connection port, the output end of the low dropout linear regulator U1 is connected with the anode of the diode D1, and the cathode of the diode D1 is connected with the power supply interface; the shutdown power supply module comprises a P-channel field effect transistor Q1, a P-channel field effect transistor Q2 and a battery power BAT1 which are connected in series. Through the hardware circuit of the automatic power switching, the second power connection port and the power supply interface are switched, so that the battery is powered by the battery in the shutdown state of the computer and the single chip microcomputer, and is powered by other power supply modes in the startup state, and the service life of the battery is prolonged.
Description
Technical Field
The utility model relates to a computer power supply switching circuit technical field, specific is a hardware circuit of automatic switch power.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
With the development of electronic technology, computers and single-chip microcomputers are more and more widely applied. In the use of computer and singlechip, the working method of battery power supply is often adopted, and no matter the state is the power-on state or the power-off state, the battery is required to continuously supply power to the mainboard, so as to ensure the normal work of singlechip and computer, and the advantage of convenient use is provided. However, the use of the battery power supply mode brings inconvenience to the use of the single chip microcomputer and the computer, wherein the computer and the single chip microcomputer are in a long-time power-on state and a long-time power-off state due to the fact that the battery consumes a lot of power and the capacity is limited, and the problem that the computer and the single chip microcomputer are powered off and stop working due to the fact that the battery power is exhausted easily occurs, so that the working progress and the working efficiency are greatly influenced, and the practicability and the reliability of the power supply mode of the computer and the single chip microcomputer are poor.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect among the prior art, the embodiment of the utility model provides an automatic hardware circuit who switches power supply is provided, through the setting of shutdown power module and external power supply unit, realized that the second connects the break-make switching of electric port and power supply interface, control computer and singlechip adopt the battery powered under the power off state, power supply with other power modes under the power on state, the life of battery has been prolonged, and then the practicality and the reliability of the power supply mode of messenger's computer and singlechip obtain the improvement.
In order to achieve the above object, the present invention provides a hardware circuit for automatically switching power supplies, which includes a first power connection port, a power supply module for starting up, a second power connection port, a power supply module for shutting down, and a power supply interface; the startup power supply module comprises a low dropout linear regulator U1 and a diode D1 which are connected in series, wherein the input end of the low dropout linear regulator U1 is connected with the first power connection port, the output end of the low dropout linear regulator U1 is connected with the anode of the diode D1, and the cathode of the diode D1 is connected with the power supply interface; the shutdown power supply module comprises a P-channel field effect transistor Q1, a P-channel field effect transistor Q2 and a battery power supply BAT1 which are connected in series, the grid electrode of the P-channel field effect transistor Q1 and the grid electrode of the P-channel field effect transistor Q1 are connected with the output end of the low dropout linear regulator U1, and the source electrode of the P-channel field effect transistor Q2 is connected with the power supply interface.
Based on the structure, when the computer or the singlechip is in a power-on state, the first power connection port is electrified, electricity is output through the low dropout linear regulator U1 and the diode D1 to supply power to the power supply interface to supply power to the computer or the singlechip, at the moment, the grids of the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are electrified, the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are cut off, and the battery power supply BAT1 and the power supply interface are disconnected and cannot be electrified with each other; after the computer is shut down: the first power connection port is not electrified any more, at the moment, the grid electrode of the P-channel field effect transistor Q1 and the grid electrode of the P-channel field effect transistor Q2 are not electrified, the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are conducted, and the battery power supply BAT1 is communicated with the power supply interface to supply power to the computer or the single chip microcomputer; according to the scheme, the battery is powered by adopting the battery in the shutdown state of the computer or the singlechip, and is powered by other power supply modes through the first power connection port in the startup state, so that the service life of the battery is prolonged.
Preferably, the source of the P-channel fet Q1 is connected to the positive electrode of the battery power supply BAT1, the drain of the P-channel fet Q2 is connected to the drain of the P-channel fet Q1, and the gates of the P-channel fet Q1 and the P-channel fet Q2 are both connected to the negative electrode of the battery power supply BAT 1.
Based on above-mentioned structure, through P channel field effect transistor Q1 and P channel field effect transistor Q2's connection setting, simplified the structure of circuit, improved the practicality that improves the hardware circuit of this application automatic switch-over power.
Preferably, the gate of the P-channel fet Q1 and the gate of the P-channel fet Q2 are connected to the negative electrode of the battery power supply BAT1 through a resistor R1, and the connection between the resistor R1 and the negative electrode of the battery power supply BAT1 is grounded.
Based on the arrangement of the resistor R1, the grid of the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 can be provided with a stable state, so that the practicability and the reliability of the hardware circuit of the automatic switching power supply are improved.
Preferably, the second power connection port is connected to a positive electrode of the battery power supply BAT1 for charging the battery power supply BAT 1.
Preferably, the model of the low dropout regulator U1 is AP2331W _ 7.
Preferably, the model of the diode D1 is 1N 4148W-F.
To sum up, according to the utility model discloses a hardware circuit of automatic switch-over power, through the connection setting of shutdown power supply module and start power supply module, make the second connect the break-make that electric port and power supply interface can switch under the operating condition of difference, realized that computer and singlechip adopt the battery powered and supply power with the mode of other power modes power supply under the power state under the shutdown state, prolonged the life of battery, and then the practicality and the reliability of the power supply mode who makes computer and singlechip obtain the improvement.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hardware circuit for automatically switching power supplies according to an embodiment of the present invention;
reference numerals of the above figures: 100-a first power connection port, 200-a power supply module for starting up, 300-a second power connection port, 400-a power supply module for shutting down and 500-a power supply interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example (b): referring to fig. 1, the hardware circuit for automatically switching power supply includes a first power connection port 100, a power-on power supply module 200, a second power connection port 300, a power-off power supply module 400, and a power supply interface 500. The first power connection port 100 is based on the prior art and is used for connecting an external power source, for example, a power line is used for connecting with a socket. The power supply interface 500 is based on the prior art and is used for transmitting the voltages output by the power-on power supply module 200 and the power-off power supply module 400 to a single chip or a motherboard of a computer.
The power-on power supply module 200 comprises a low dropout regulator U1 and a diode D1 which are connected in series, wherein an input end of the low dropout regulator U1 is connected with the first power connection port 100, an output end of the low dropout regulator U1 is connected with an anode of the diode D1, and a cathode of the diode D1 is connected with the power supply interface 500.
The shutdown power supply module 400 comprises a P-channel field effect transistor Q1, a P-channel field effect transistor Q2 and a battery power supply BAT1 which are connected in series, the grid electrode of the P-channel field effect transistor Q1 and the grid electrode of the P-channel field effect transistor Q2 are connected with the output end of the low dropout linear regulator U1, and the source electrode of the P-channel field effect transistor Q2 is connected with the power supply interface 500.
Based on the structure, when the computer or the singlechip is in a power-on state, the first power connection port 100 is powered on, electricity is output to the power supply interface through the low dropout linear regulator U1 and the diode D1 to supply power to the computer or the singlechip, at the moment, the grids of the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are powered on, the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are cut off, and the battery power supply BAT1 and the power supply interface 500 are disconnected and cannot be powered on; after the computer is shut down: the first power connection port 100 is not powered on any more, at the moment, the grid electrode of the P-channel field effect transistor Q1 and the grid electrode of the P-channel field effect transistor Q2 are not powered, the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are conducted, and the battery power supply BAT1 is communicated with the power supply interface 500 to supply power to the computer or the single chip microcomputer; according to the scheme, the battery is powered by the battery when the computer or the singlechip is in the off state, and is powered by other power supply modes through the first power connection port 100 in the on state, so that the service life of the battery is prolonged.
As a preferred embodiment of this embodiment, the source of the P-channel fet Q1 is connected to the positive terminal of the battery power supply BAT1, the drain of the P-channel fet Q2 is connected to the drain of the P-channel fet Q1, and the gate of the P-channel fet Q1 and the gate of the P-channel fet Q2 are both connected to the negative terminal of the battery power supply BAT 1. The advantage of setting up like this is, through P channel field effect transistor Q1 and P channel field effect transistor Q2's connection setting, has simplified the structure of circuit, has improved the practicality that improves the hardware circuit of this application automatic switch-over power.
In this embodiment, the gate of the pfet Q1 and the gate of the pfet Q2 are connected to the negative terminal of the battery power supply BAT1 through the resistor R1, and the connection between the resistor R1 and the negative terminal of the battery power supply BAT1 is grounded. The resistance value of the resistor R1 of the present embodiment is 1M Ω. The advantage of this arrangement is that, through the gate of P-channel fet Q1 and the gate of P-channel fet Q2 being connected to resistor R1, resistor R1 is grounded, and a stable state of the gate of P-channel fet Q1 and P-channel fet Q2 can be provided, thereby improving the practicality and reliability of the hardware circuit of the present application for automatically switching power supplies.
As a preferred implementation manner of this embodiment, the second power connection port 300 is connected to the positive electrode of the battery power supply BAT1 for charging the battery power supply BAT 1.
In the present embodiment, the low dropout linear regulator U1 is model AP2331W _ 7.
In the present embodiment, the diode D1 has a model number of 1N 4148W-F.
Through the above-mentioned hardware circuit for automatically switching power supplies, the connection setting of the shutdown power supply module 400 and the startup power supply module 200 enables the second power connection port 300 and the on-off of the power supply interface 500 to be switched under different working states, so that the mode that the computer and the singlechip adopt the battery power supply under the shutdown state and use other power supply modes to supply power under the startup state is realized, the service life of the battery is prolonged, and further the practicability and reliability of the power supply mode of the computer and the singlechip are improved.
The working principle is as follows: 1. when the computer or the single chip microcomputer is in a startup state, the first power connection port 100 outputs voltage to supply power to the mainboard through the startup power supply module 200 and the power supply interface 500; at this time, the grid of the P-channel field effect transistor Q1 and the grid of the P-channel field effect transistor Q2 are electrified, the grid of the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are cut off, the second power connection port 300 is disconnected from the power supply interface 500, and the computer or the single chip microcomputer supplies power through the power supply module 200;
2. after the computer is shut down: the first power connection port 100 is disconnected from an external power supply, so that no voltage is input to the first power connection port 100, the power supply interface 500 is disconnected from the external power supply, at the moment, the grid of the P-channel field effect transistor Q1 and the grid of the P-channel field effect transistor Q2 are not powered, the P-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are switched on, and the second power connection port 300 is communicated with the power supply interface 500 to supply power to a main board of a computer or a single chip microcomputer.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. A hardware circuit capable of automatically switching power supply is characterized by comprising a first power connection port (100), a starting power supply module (200), a second power connection port (300), a shutdown power supply module (400) and a power supply interface (500);
the power-on power supply module (200) comprises a low dropout linear regulator U1 and a diode D1 which are connected in series, wherein the input end of the low dropout linear regulator U1 is connected with the first power connection port (100), the output end of the low dropout linear regulator U1 is connected with the anode of the diode D1, and the cathode of the diode D1 is connected with the power supply interface (500);
the shutdown power supply module (400) comprises a P-channel field effect transistor Q1, a P-channel field effect transistor Q2 and a battery power supply BAT1 which are connected in series, the grid electrode of the P-channel field effect transistor Q1 and the grid electrode of the P-channel field effect transistor Q2 are connected with the output end of the low dropout linear regulator U1, and the source electrode of the P-channel field effect transistor Q2 is connected with the power supply interface (500).
2. The hardware circuit for automatically switching power supply of claim 1, wherein the source of said P-channel fet Q1 is connected to the positive terminal of said battery power supply BAT1, the drain of said P-channel fet Q2 is connected to the drain of said P-channel fet Q1, and the gate of said P-channel fet Q1 and the gate of said P-channel fet Q2 are both connected to the negative terminal of said battery power supply BAT 1.
3. The hardware circuit for automatically switching power supply of claim 2, wherein the gate of said P-channel fet Q1 and the gate of said P-channel fet Q2 are connected to the negative terminal of said battery power supply BAT1 through a resistor R1, and the connection between said resistor R1 and the negative terminal of said battery power supply BAT1 is grounded.
4. The hardware circuit of automatically switched power supply according to claim 1, wherein said second powered port (300) is connected to the positive pole of said battery power supply BAT1 for charging said battery power supply BAT 1.
5. The hardware circuit for automatically switching power supply of claim 1, wherein said low dropout linear regulator U1 is model number AP2331W _ 7.
6. The hardware circuit for automatically switching power according to claim 1, wherein said diode D1 has a model number of 1N 4148W-F.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922116862.1U CN211236841U (en) | 2019-12-02 | 2019-12-02 | Hardware circuit capable of automatically switching power supply |
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| CN201922116862.1U CN211236841U (en) | 2019-12-02 | 2019-12-02 | Hardware circuit capable of automatically switching power supply |
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| CN211236841U true CN211236841U (en) | 2020-08-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117278015A (en) * | 2023-11-21 | 2023-12-22 | 成都怡康科技有限公司 | Low-power-consumption multi-trigger-source switching-on and switching-off circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117278015A (en) * | 2023-11-21 | 2023-12-22 | 成都怡康科技有限公司 | Low-power-consumption multi-trigger-source switching-on and switching-off circuit |
| CN117278015B (en) * | 2023-11-21 | 2024-01-30 | 成都怡康科技有限公司 | Low-power-consumption multi-trigger-source switching-on and switching-off circuit |
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