CN215010202U - Main/standby electricity monitoring switching on/off circuit - Google Patents
Main/standby electricity monitoring switching on/off circuit Download PDFInfo
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- CN215010202U CN215010202U CN202120888854.3U CN202120888854U CN215010202U CN 215010202 U CN215010202 U CN 215010202U CN 202120888854 U CN202120888854 U CN 202120888854U CN 215010202 U CN215010202 U CN 215010202U
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Abstract
The utility model provides a host-standby electricity monitoring switching on-off circuit, which comprises a host-standby electricity input module, a host-standby electricity switching module, a monitoring module and an on-off module; the utility model provides a activestandby electricity monitoring switching on and off circuit through monitoring module cooperation main and standby electricity switch module and switching on and off module, solves the problem that the activestandby electricity switches and main electricity is extracted occasionally shutdown, data loss among the prior art. The utility model relates to a principle is reliable, has very extensive application prospect.
Description
Technical Field
The utility model relates to a circuit control technical field especially relates to a activestandby electricity monitoring switching on and off circuit.
Background
Many embedded motherboards that prior art is common have multiple power input, and the most common has 2, for the input of activestandby electricity, main electricity is the adapter usually, and the standby electricity is the battery. The main power supply and the standby power supply can be independently powered in the use process, and the main power supply is preferentially selected when the main power supply and the standby power supply are simultaneously accessed. Many embedded mainboard development boards have the power management chip that uses with the supporting of treater, and this power management can accomplish main and standby electricity and switch and some power output, but most power management only supports single section battery, and the load capacity of output voltage also can not be too big, more is fit for doing the power supply management of treater alone, and for the development board, its application environment is more diversified complicated, probably faces the use of multisection battery and heavy load, and integrated power management just so is improper to be used, and integrated power management's replaceability is poor.
In order to solve the above problems, the prior art uses a switch circuit under such circumstances, and uses diodes, MOS transistors and triodes with different parameters to build up in a self-organizing manner according to the needs of the user.
However, in the prior art, the power switching circuit of the embedded development board used for solving the above problems is often implemented based on an integrated power management chip, most of the integrated power management only supports a single battery, has a small output voltage load capability, is more suitable for being used as a peripheral power supply design of a processor, and is difficult to adapt to a large load of an embedded motherboard and a complex and diverse application environment.
Meanwhile, in the prior art, main and standby power switching is performed under the conditions of large circuit load and large capacitance, the phenomenon that the capacitance in the circuit has electric power storage and is slowly discharged to cause circuit misoperation is easily caused, a standby power switch cannot be timely turned on when the main power is removed, the circuit is continuously powered by the main power, the electric power storage has no load capacity, the voltage is instantly lowered to power off, the problems that the shutdown is suddenly stopped, the system cannot run to the expected state are caused, and the risk of data loss exists under the extreme condition.
In summary, the main and standby electricity monitoring switching on and switching off circuit has higher practical value and significance.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model provides a activestandby electricity monitoring switching on and off circuit.
The utility model provides a host-standby electricity monitoring switching on-off circuit, which comprises a host-standby electricity input module, a host-standby electricity switching module, a monitoring module and an on-off module;
the main and standby electric input modules comprise a main electric input unit, a standby electric input unit and a power supply input node; the main electrical signal is electrically connected with the power input node through the main electrical input unit; the standby power signal is electrically connected with the power input node through the standby power input unit;
the main/standby electric switching module comprises a switching control unit; the switching control unit is arranged on the main circuit and/or the standby circuit and can be switched between an on state and an off state; the main electric path is an electric path between a main electric signal and a power supply input node; the standby power path is an electric path between a standby power signal and a power supply input node;
the monitoring module comprises a voltage division unit and a monitoring control unit; one end of the voltage division unit is electrically connected with the main electric signal and/or the standby electric signal, and the other end of the voltage division unit is electrically connected with the monitoring control unit; the monitoring control unit is electrically connected with the switching control unit;
the on-off module comprises an on-off control unit and a power supply output node; the switch control unit is electrically connected with the switch control signal; the power input node is electrically connected with the power output node through the switch control unit.
According to the utility model provides a main standby electricity monitoring switching on and off circuit, switching control unit includes switching control MOS pipe; the source electrode of the switching control MOS tube is electrically connected with the power supply input node; the drain electrode of the switching control MOS tube is electrically connected with a standby signal; and the monitoring control unit is electrically connected with the grid electrode of the switching control MOS tube.
According to the utility model provides a activestandby electricity monitoring change over switch circuit, main electric input unit includes main electric input diode; the standby power input unit comprises a parasitic diode of a switching control MOS tube.
According to the utility model provides a activestandby electricity monitoring switching on and off circuit, the monitoring control unit includes the monitoring control triode; the emitter of the monitoring control triode is grounded; the collector electrode of the monitoring control triode is electrically connected with the grid electrode of the switching control MOS tube; and the base electrode of the monitoring control triode is electrically connected with the voltage division unit.
According to the utility model provides a main standby electricity monitoring switching on and off circuit, the voltage divider unit includes first divider resistance, second divider resistance and divider triode;
the main electric signal is grounded through a first voltage division resistor, a voltage division node and a second voltage division resistor in sequence; the base electrode of the voltage division triode is electrically connected with a voltage division node; the emitting electrode of the voltage division triode is grounded; and the collector electrode of the voltage division triode is electrically connected with the base electrode of the monitoring control triode.
According to the utility model provides a activestandby electricity monitoring switching on and off circuit, the on-off control unit includes on-off control triode and on-off control MOS pipe;
the source electrode of the switch control MOS tube is electrically connected with the power supply output node; the drain electrode of the switch control MOS tube is electrically connected with a power supply input node; the grid electrode of the switch control MOS tube is electrically connected with the collector electrode of the switch control triode; the emitting electrode of the switch control triode is grounded; and the base electrode of the switch control triode is electrically connected with the switch control signal.
The utility model provides a activestandby electricity monitoring change over switch circuit, through monitoring module cooperation main electricity switching module and switching on and shutting down module, thereby the main electricity of preference is shut off when realizing the main electricity of being equipped with and inserts simultaneously and is equipped with the electricity, and the main electricity of monitoring voltage drop condition in time opening when removing, and the start is realized to hardware switch cooperation software control, and then solve the problem that the activestandby electricity switches and main electricity is extracted occasionally and is shut down suddenly among the prior art, data loss. The utility model relates to a principle is reliable, has very extensive application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a main/standby electrical monitoring switching circuit provided by the present invention;
fig. 2 is a schematic diagram of a circuit provided by an embodiment of the present invention.
Reference numerals:
1: a main and standby power input module; 2: a main and standby power switching module; 3: a monitoring module;
4: a power on/off module; 101: a main electrical input unit; 102: a standby power input unit;
103: a power supply input node; 201: a switching control unit; 301: a monitoring control unit;
302: a voltage dividing unit; 401: a switch control unit; 402: a power supply output node.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are 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 efforts belong to the protection scope of the present invention.
The main/standby electrical monitoring switching circuit of the present invention is described with reference to fig. 1.
The embodiment provides a main/standby electricity monitoring switching on/off circuit, which comprises a main/standby electricity input module 1, a main/standby electricity switching module 2, a monitoring module 3 and an on/off module 4;
the main and standby power input module 1 comprises a main power input unit 101, a standby power input unit 102 and a power input node 103; the main electrical signal is electrically connected to the power input node 103 via the main electrical input unit 101; the standby power signal is electrically connected to the power input node 103 through the standby power input unit 102;
the main and standby power switching module 2 comprises a switching control unit 201; the switching control unit 201 is provided on the main electric path and/or the backup electric path, and is capable of switching between an on state and an off state; the main electrical path is an electrical path between a main electrical signal and the power input node 103; the standby power path is an electrical path between a standby power signal and the power input node 103;
the monitoring module 3 comprises a voltage division unit 302 and a monitoring control unit 301; one end of the voltage division unit 302 is electrically connected with the main electric signal and/or the standby electric signal, and the other end is electrically connected with the monitoring control unit 301; the monitoring control unit 301 is electrically connected with the switching control unit 201;
the switching-on/off module 4 comprises a switching control unit 401 and a power supply output node 402; the switch control unit 401 is electrically connected with a switch control signal; the power input node 103 is electrically connected to a power output node 402 via a switch control unit 401.
The beneficial effect of this embodiment lies in:
through monitoring module 3 cooperation main standby electricity switch module 2 and switching on and shutting down module 4 to the main power of preferred selection is switched off when realizing main standby electricity and inserts simultaneously, and the main monitoring voltage drop condition in time opens the standby electricity when removing, and the start is realized in hardware switch cooperation software control, and then solves the problem that the main standby electricity switches and main electric plug-out time shutdown suddenly, data loss among the prior art, has that the design principle is reliable, the extensive advantage of application prospect.
According to the above embodiment, in the present embodiment:
the switching control unit 201 comprises a switching control MOS tube; the source electrode of the switching control MOS tube is electrically connected with a power input node 103; the drain electrode of the switching control MOS tube is electrically connected with a standby signal; the monitoring control unit 301 is electrically connected with the gate of the switching control MOS transistor.
The beneficial effect of this embodiment lies in:
utilize the switch principle of MOS pipe, realize the control that main and standby electricity switches, the cooperation the utility model discloses an other modules can effectively utilize circuit resource, realize the activestandby power switch reliably and steadily.
According to any of the above embodiments, in this embodiment:
the main electrical input unit 101 comprises a main electrical input diode; the standby input unit 102 includes a parasitic diode of a switching control MOS transistor.
The beneficial effect of this embodiment lies in:
the input and reverse cut-off of the main power are realized by utilizing the unidirectional conduction characteristic of the diode, and the reliability of the main power supply is ensured.
According to any of the above embodiments, in this embodiment:
the monitoring control unit 301 comprises a monitoring control triode; the emitter of the monitoring control triode is grounded; the collector electrode of the monitoring control triode is electrically connected with the grid electrode of the switching control MOS tube; the base of the monitoring control triode is electrically connected with the voltage division unit 302.
The beneficial effect of this embodiment lies in:
through monitoring the state of the main electric signal, more guaranteed power supply switching control is realized, and the problems that in the prior art, a capacitor in a circuit has electric power storage and discharges slowly, so that the circuit is operated by mistake, and a standby switch cannot be opened in time when the main electric signal is removed are solved.
According to any of the above embodiments, in this embodiment:
the voltage dividing unit 302 includes a first voltage dividing resistor, a second voltage dividing resistor and a voltage dividing triode;
the main electric signal is grounded through a first voltage division resistor, a voltage division node and a second voltage division resistor in sequence; the base electrode of the voltage division triode is electrically connected with a voltage division node; the emitting electrode of the voltage division triode is grounded; and the collector electrode of the voltage division triode is electrically connected with the base electrode of the monitoring control triode.
The beneficial effect of this embodiment lies in:
the secondary triode circuit is used for monitoring the main power failure condition, a critical value is set according to the actual use condition, the detection circuit acts according to the critical value, and the standby switch is controlled to be turned on in time, so that the risk of sudden shutdown caused by the fact that the circuit has electric power storage and discharges slowly is avoided.
According to any of the above embodiments, in this embodiment:
the switch control unit 401 comprises a switch control triode and a switch control MOS tube;
the source electrode of the switch control MOS tube is electrically connected with a power supply output node 402; the drain electrode of the switch control MOS tube is electrically connected with a power input node 103; the grid electrode of the switch control MOS tube is electrically connected with the collector electrode of the switch control triode; the emitting electrode of the switch control triode is grounded; and the base electrode of the switch control triode is electrically connected with the switch control signal.
The beneficial effect of this embodiment lies in:
after the main and standby power switching is finished, a switching circuit is built by using a triode and an MOS tube, and the switching circuit is controlled by software and inputs high and low levels to realize the switching function; the reliability of the system switch is guaranteed.
An embodiment of a main/standby power monitoring switching circuit is provided in the following description in combination with a specific application scenario, where:
the technical problem that this embodiment solved is: the switching input and the starting-up of the main and standby power supplies of the embedded mainboard. The method specifically comprises main power input and reverse cut-off, standby power input and reverse cut-off, when the main power and the standby power are simultaneously connected, the main power is preferentially selected to be switched off and the standby power is switched on, when the main power is removed, the voltage drop condition is monitored, and the standby power is timely switched on, and the hardware switch is matched with software to control the startup.
In order to solve the technical problem, the embodiment discloses a power switching and on-off control circuit which is built by a diode, an NPN triode, a PMOS transistor, a divider resistor, a pull-up resistor and a filter capacitor. The characteristic of unidirectional conduction of a diode is utilized to realize the input and reverse cut-off of main power, the characteristic of conduction of a PMOS (P-channel metal oxide semiconductor) tube is utilized to realize the input and reverse cut-off of standby power, an NPN (negative-positive-negative) triode is connected to a PMOS (P-channel metal oxide semiconductor) control pin in cooperation with a divider resistor and a pull-up resistor, the main power input is preferentially selected when the main power and the standby power are input simultaneously by utilizing the control of the main power input voltage, the standby power is cut off, and when the main power is removed, the reduction condition of the main power voltage is monitored, the standby power is timely connected, and the abnormal shutdown is prevented. After the main and standby power switching is finished, a switching circuit is built by using an NPN triode and a PMOS tube, the switching circuit is controlled by software, and the high and low levels are input to realize the switching function. The utility model relates to a principle is reliable, has very extensive application prospect.
As shown in fig. 2, the active/standby power monitoring and switching power-on circuit includes an active/standby power input, an active/standby power switching, and a main power monitoring and power-on/off module.
Main and standby power input: the main electrical input uses a unidirectional diode, which prevents voltage from flowing backwards. The standby power input uses a PMOS tube, and the parasitic diode in the PMOS tube is used for realizing the backflow prevention.
Switching between main power supply and standby power supply: and an NPN triode and a pull-up resistor are used as a switch to control the on-off of the standby power input PMOS.
Main electric monitoring: and a divider resistor and an NPN triode are used, and the on-off of the triode is controlled by using main electric voltage division, so that the triode is controlled and switched, and main electric monitoring is realized.
A power on/off circuit: a high-low level control circuit is realized by combining a PMOS transistor and an NPN transistor.
In this embodiment, a main/standby power combination is taken as an example, a 9V main power battery and a 8.4V standby power battery are adopted, and a monitoring main power switching voltage is set to be 7.88V.
Selecting devices: diode SS54, PMOS transistor SM3305 (low level conduction), NPN triode S8050-J3Y (high level conduction)
The main POWER is input through a diode D1, the standby POWER is input through a Q1 tube, and the input ends of the standby POWER are connected to POWER-IN. Both of which may be turned on to POWER-IN when they are input separately.
When the main power supply and the standby power supply are simultaneously accessed, the main power supply turns off the Q1 through a pull-up resistor R1, so that the standby power supply is disconnected.
When the main power is pulled out, the circuit stores electricity, so that the main power does not drop rapidly, the main power is monitored through resistance voltage division of R3 and R4, when the main power is more than or equal to 7.88V, the Q3 is controlled to be switched on and pulled down the Q2 control pin, the Q2 is switched off, and the Q1 keeps the R1 to be pulled up and is continuously switched off, so that the standby power is switched off; when the main power is less than 7.88V, Q3 is turned off, a Q2 control pin is pulled high by a pull-up resistor R2, Q2 is turned on, a Q1 control pin is pulled low, Q1 is turned on, standby power is connected, and switching is completed. In the design, when the main power is reduced to 7.88V, the main power is a critical value for switching the main power and the standby power, and the value can be adjusted through a voltage dividing resistor according to the actual application requirement.
When the main POWER supply and the standby POWER supply are switched, the software control signal POWER-CTRL controls the Q5 to be switched on at a high level, the control pin Q4 is connected with low, the Q4 is switched on, and the POWER-OUT is output to realize startup.
This embodiment solves the main spare electricity of embedded development board and switches the problem, and when main electricity is 9V adapter, the spare electricity is two festival lithium cells of 8.4V, monitors main electricity and steps down to 7.88V, in time opens the spare electricity, accomplishes the switching. The sudden shutdown caused by slow voltage drop due to circuit power storage is avoided.
The key points and points to be protected in this embodiment are: the main power can monitor the main backup power switching circuit.
The embodiment provides a main/standby electricity monitoring and switching circuit, which solves the risk problem of sudden shutdown when main/standby electricity is switched and main/standby electricity is pulled out on an embedded development board. The utility model relates to a principle is reliable, has very extensive application prospect.
The core modules of the embodiment are: the whole active/standby power monitoring switching on/off circuit design system.
For the present embodiment, the main electrical monitoring control circuit of the two-level triode is one of the key innovation points.
The embodiment provides a main and standby electricity switch circuit capable of being monitored, a secondary triode circuit is used by a main and standby electricity switch control part of the circuit and used for monitoring the main power failure condition, a critical value is set according to the actual use condition, a detection circuit acts according to the critical value and controls a standby switch to be opened in time, and therefore the risk that the circuit is in power storage and is suddenly shut down due to slow discharge is avoided.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A main and standby electricity monitoring switching on and off circuit is characterized by comprising a main and standby electricity input module, a main and standby electricity switching module, a monitoring module and a switching on and off module;
the main and standby electric input modules comprise a main electric input unit, a standby electric input unit and a power supply input node; the main electrical signal is electrically connected with the power input node through the main electrical input unit; the standby power signal is electrically connected with the power input node through the standby power input unit;
the main/standby electric switching module comprises a switching control unit; the switching control unit is arranged on the main circuit and/or the standby circuit and can be switched between an on state and an off state; the main electric path is an electric path between a main electric signal and a power supply input node; the standby power path is an electric path between a standby power signal and a power supply input node;
the monitoring module comprises a voltage division unit and a monitoring control unit; one end of the voltage division unit is electrically connected with the main electric signal and/or the standby electric signal, and the other end of the voltage division unit is electrically connected with the monitoring control unit; the monitoring control unit is electrically connected with the switching control unit;
the on-off module comprises an on-off control unit and a power supply output node; the switch control unit is electrically connected with the switch control signal; the power input node is electrically connected with the power output node through the switch control unit.
2. The main/standby electrical monitoring switching circuit according to claim 1, wherein the switching control unit includes a switching control MOS transistor; the source electrode of the switching control MOS tube is electrically connected with the power supply input node; the drain electrode of the switching control MOS tube is electrically connected with a standby signal; and the monitoring control unit is electrically connected with the grid electrode of the switching control MOS tube.
3. The active-standby electrical monitoring switching circuit according to claim 2, wherein the main electrical input unit includes a main electrical input diode; the standby power input unit comprises a parasitic diode of a switching control MOS tube.
4. The active/standby electrical monitoring switching circuit according to claim 2, wherein the monitoring control unit includes a monitoring control transistor; the emitter of the monitoring control triode is grounded; the collector electrode of the monitoring control triode is electrically connected with the grid electrode of the switching control MOS tube; and the base electrode of the monitoring control triode is electrically connected with the voltage division unit.
5. The main/standby electrical monitoring switching circuit according to claim 4, wherein the voltage dividing unit includes a first voltage dividing resistor, a second voltage dividing resistor and a voltage dividing triode;
the main electric signal is grounded through a first voltage division resistor, a voltage division node and a second voltage division resistor in sequence; the base electrode of the voltage division triode is electrically connected with a voltage division node; the emitting electrode of the voltage division triode is grounded; and the collector electrode of the voltage division triode is electrically connected with the base electrode of the monitoring control triode.
6. The main/standby electrical monitoring switching circuit according to claim 1, wherein the switching control unit includes a switching control triode and a switching control MOS transistor;
the source electrode of the switch control MOS tube is electrically connected with the power supply output node; the drain electrode of the switch control MOS tube is electrically connected with a power supply input node; the grid electrode of the switch control MOS tube is electrically connected with the collector electrode of the switch control triode; the emitting electrode of the switch control triode is grounded; and the base electrode of the switch control triode is electrically connected with the switch control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120888854.3U CN215010202U (en) | 2021-04-27 | 2021-04-27 | Main/standby electricity monitoring switching on/off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120888854.3U CN215010202U (en) | 2021-04-27 | 2021-04-27 | Main/standby electricity monitoring switching on/off circuit |
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| Publication Number | Publication Date |
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| CN215010202U true CN215010202U (en) | 2021-12-03 |
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| CN202120888854.3U Active CN215010202U (en) | 2021-04-27 | 2021-04-27 | Main/standby electricity monitoring switching on/off circuit |
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