CN219659576U - Power output control circuit with forced stopping function and power supply device - Google Patents
Power output control circuit with forced stopping function and power supply device Download PDFInfo
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- CN219659576U CN219659576U CN202320309676.3U CN202320309676U CN219659576U CN 219659576 U CN219659576 U CN 219659576U CN 202320309676 U CN202320309676 U CN 202320309676U CN 219659576 U CN219659576 U CN 219659576U
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- 239000003990 capacitor Substances 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
A power output control circuit with a strong stopping function and a power supply device comprise a trigger circuit, a NOR gate and a switch circuit, wherein the trigger circuit is a monostable trigger circuit and comprises a monostable trigger, a trigger signal input end connected to an input pin of the monostable trigger and a KEY, and the trigger signal input end can receive a pulse signal sent by a microprocessor; the output pin of the monostable trigger is connected to one input pin of the NOR gate, the other input pin of the NOR gate is grounded, and the output pin of the NOR gate is connected to the input end of the switching circuit to control the switching circuit to be turned on and off; the grounded pin is also connected with a strong stop signal input end in parallel; when the high-level signal is input to the strong stop signal input end, the NOR gate outputs low level to disconnect the switch circuit, so that the current of the power supply is prevented from being input to the electrical element. The utility model can forcibly turn off the power supply when the electric element does not need to input the power supply and the microprocessor cannot process the power supply, thereby preventing the power supply from being input into the electric element.
Description
Technical Field
The utility model relates to a power output control circuit with a strong stopping function, and belongs to the field of power output control.
Background
With the use of electronic circuits, how to control the circuit switch and to achieve a wide range of operating environments and low power consumption is an important consideration.
The switch control circuit which is composed of a microprocessor, a KEY, a monostable trigger, a switch circuit and a logic element or a logic circuit is used for controlling a power supply to be transmitted to an electric appliance element, and is a power supply output control circuit with lower power consumption. The microprocessor provides pulse signals for the monostable trigger to enable the monostable trigger to change the output state under the action of the pulse, and after the two output states of the monostable trigger are reacted with the logic element or the logic circuit, the logic element or the logic circuit outputs two results, and the two output results respectively control the switch circuit to be turned off and on, so that whether a power supply can be input into an electrical element or not is controlled. The specific structure of the power output control circuit can be found in the description of the embodiments.
However, the microprocessor may cause a dead halt or a dead cycle due to a longer program or redundancy or use of infinite loop sentences or poor heat dissipation, and the like, and at this time, the microprocessor no longer responds to an external signal, does not change an output state, and cannot prevent power input when the electrical components do not need to input power.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the power output control circuit with the forced stopping function, which can forcedly turn off the power supply when the electric elements do not need to be input with the power supply and the microprocessor cannot process the power supply, so as to prevent the power supply from being input into the electric elements.
A power output control circuit with a strong stopping function comprises a trigger circuit, a NOR gate and a switch circuit; the trigger circuit is a monostable trigger circuit and comprises a monostable trigger, a trigger signal input end and a KEY, wherein the trigger signal input end is connected to an input pin of the monostable trigger and is used for changing the state of the monostable trigger, and the trigger signal input end can receive a pulse signal sent by the microprocessor;
the switch circuit is provided with a power input end for being connected to a power supply, a power output end for being connected to an electrical element and a control end for controlling the switch circuit to be turned on and off;
the output pin of the monostable trigger is connected to one of the input pins of the NOR gate, the other input pin of the NOR gate is grounded, the output pin of the NOR gate is connected to the control end of the switching circuit,
the pin grounded by the NOR gate is also connected with a strong stop signal input end in parallel; when the high level signal is input to the strong stop signal input end, the NOR gate outputs low level to disconnect the switch circuit.
Preferably, the switching circuit is a mos transistor switching circuit.
Preferably, a triode and a mos tube are arranged in the mos tube switching circuit, wherein a base electrode of the triode is connected to an output pin of the NOR gate, a collector electrode of the triode is connected to a power input end, an emitter electrode of the triode is grounded, a grid electrode of the mos tube is connected to the collector electrode of the triode, a source electrode of the mos tube is connected to the power input end, and a drain electrode of the mos tube is connected to the electrical element.
Preferably, the voltage of the power input end is 20-30v.
Preferably, the trigger signal input end is connected with the capacitor C3 and then is connected with an input pin of the monostable trigger, and one end of the capacitor C3 connected with the input pin of the monostable trigger is also connected with a shielding signal input end.
The power supply device comprises a voltage source and a power supply output control circuit for controlling the output of the voltage source, wherein the power supply output control circuit is the power supply output control circuit in any technical scheme.
In summary, the utility model has the following beneficial effects:
1: the utility model can forcibly turn off the power supply when the electric element does not need to input the power supply and the microprocessor cannot process the power supply, thereby preventing the power supply from being input into the electric element.
2: according to the utility model, the trigger signal input end OFF_CON is connected with the capacitor C3 and then is connected with the input pin of the monostable trigger, the rear end of the capacitor C3 is connected with the shielding signal input end in parallel, and after the shielding signal input end OFF_EN inputs a high level, the 11 pin of U1 is made to be a high level, so that the edge pulse signal of the trigger signal input end through the capacitor C3 is shielded, the power-on state is prevented from being accidentally changed, and the original working state of the electric element A is maintained.
Drawings
Fig. 1 is a schematic diagram of a power output control circuit.
Detailed Description
The utility model will be further illustrated by the following examples in conjunction with the accompanying drawings.
Examples:
as shown in fig. 1, a power output control circuit with a strong stopping function includes a trigger circuit, a nor gate 74HC02, and a switching circuit.
The trigger circuit adopts a common monostable trigger circuit, and comprises a monostable trigger 74HC74 and a trigger signal input end OFF_CON, a KEY KEY, wherein the trigger signal input end OFF_CON is connected with a capacitor C3 and then is connected to a 2CP input pin of the monostable trigger 74HC74, a 2/SD pin of the monostable trigger 74HC74 is connected with a pull-up resistor R3 and then is connected to a power supply VCC3.3 with smaller voltage, an output end of the pull-up resistor R3 is connected with a capacitor C2 and then is grounded, one end of the capacitor C3 connected with the 2CP input pin of the monostable trigger 74HC is connected to the power supply VCC3.3 through a pull-up resistor R4, a capacitor C1 is connected between an output end of the pull-up resistor R4 and an output end of the pull-up resistor R2 in parallel, and an output end of the pull-up resistor R2 is connected with the KEY KEY and then grounded.
The trigger signal input end OFF_CON is used for being connected with the microprocessor, receiving the pulse signal sent by the microprocessor and providing the pulse signal for the monostable trigger 74HC74 so as to change the output state of the monostable trigger.
The 2Q output pin of the monostable 74HC74 is connected to the 4B input pin of the nor gate 74HC02, the 4A input pin of the nor gate 74HC02 is grounded, the 4Y output pin of the nor gate 74HC02 is connected to the resistor R6 and then connected to the control terminal of the switching circuit, and the switching circuit further has a power input terminal POW-IN for connection to a power supply and a power output terminal for connection to the electrical component a, and is used for controlling the power input terminal POW-IN to input a current to the electrical component a.
IN the circuit, before a KEY KEY is closed, a monostable trigger 74HC74 is IN a steady state, after the KEY KEY is pressed or a trigger signal input end OFF_CON receives a pulse signal from a microprocessor, the output state of the monostable trigger is turned over between 1 and 0, after the output states 1 and 0 of the monostable trigger 74HC74 interact with a NOR gate 74HC02, the NOR gate 74HC02 outputs 0 and 1 results, the two output results respectively control a switching circuit to be closed and conducted, when the monostable trigger 74HC74 is IN the 1 state, the switching circuit is IN the closed state, a power input end POW-IN cannot input current, an electric element A does not work, when the monostable trigger 74HC74 is IN the 0, a forced STOP signal STOP is input to be 0, the switching circuit is conducted, the power input end POW-IN can input current, and the electric element A can work.
The above description is that IN the prior art, unlike the prior art, IN this embodiment, the 4A input pin grounded by the nor gate is further connected with the STOP signal input end STOP IN parallel, when the electrical component a does not need to input a power supply and the microprocessor cannot process, the nor gate 74HC02 can output a low level through the STOP signal input end STOP, so that the switching circuit connected to the power supply input end POW-IN is turned off, thereby realizing forced power output shutdown and preventing the power supply from being input into the electrical component a.
In the circuit structure, the switch circuit adopts a mos transistor switch circuit. The transistor switch circuit is internally provided with a triode Q2 and a mos transistor, wherein the base electrode of the triode Q2 is connected with the output pin of the NOR gate 74HC02, the collector electrode of the triode Q2 is connected with the power input end POW-IN after being connected with the resistor R5, the emitter electrode of the triode Q2 is grounded, the grid electrode G of the mos transistor is connected with the collector electrode of the triode Q2, the source electrode S of the mos transistor is connected with the power input end POW-IN, the drain electrode D of the mos transistor is connected with the electric element A and then grounded, the transistor switch circuit is suitable for a power supply with larger voltage, and the voltage of the power input end POW-IN can be input by 20-30v.
Preferably, the strong STOP signal input terminal STOP is connected to the input pin 4A grounded to the nor gate 74HC02 through a current stabilizing diode D2, when the STOP signal is "0", normal control of the front end KEY and the off_con is not affected, and when the STOP signal is "1", the electrical element a is forcibly turned OFF.
When the electrical component a is in an operating or non-operating state, the microprocessor may change the on state of the power supply due to various reasons such as incorrect input of a user, so as to affect the original operating state of the electrical component a, so that when there is a need to maintain the original operating state of the electrical component a, it is necessary to prevent the microprocessor from changing the on state of the power supply due to unexpected reasons, and therefore, the end of the capacitor C3 connected to the 2CP input pin of the monostable trigger 74HC74 is further connected to the shielding signal input end off_en. When the shielding signal input end OFF_EN inputs a high level, the shielding capacitor C3 can trigger the pulse input by the signal input end OFF_CON, so that the power on state is prevented from being changed accidentally, and the original working state of the electrical element A is maintained.
The embodiment also relates to a power supply device, which comprises a voltage source and a power supply output control circuit for controlling the output of the voltage source, wherein the power supply output control circuit is the power supply output control circuit in any technical scheme.
The above examples are only illustrative of the preferred embodiments of the present utility model and do not limit the spirit and scope of the present utility model. Various modifications and improvements of the technical scheme of the present utility model will fall within the protection scope of the present utility model without departing from the design concept of the present utility model, and the technical content of the present utility model is fully described in the claims.
Claims (7)
1. A power output control circuit with a strong stopping function comprises a trigger circuit, a NOR gate and a switch circuit; the trigger circuit is a monostable trigger circuit and comprises a monostable trigger, a trigger signal input end and a KEY, wherein the trigger signal input end is connected to an input pin of the monostable trigger and is used for changing the output state of the monostable trigger, and the trigger signal input end can receive a pulse signal sent by the microprocessor;
the switch circuit is provided with a power input end for being connected to a power supply, a power output end for being connected to an electrical element and a control end for controlling the switch circuit to be turned on and off;
the output pin of the monostable trigger is connected to one of the input pins of the NOR gate, the other input pin of the NOR gate is grounded, the output pin of the NOR gate is connected to the control end of the switching circuit,
the device is characterized in that the pin grounded by the NOR gate is also connected with a strong stop signal input end in parallel; when the high level signal is input to the strong stop signal input end, the NOR gate outputs low level to disconnect the switch circuit.
2. The power output control circuit with forced stopping function according to claim 1, wherein the switching circuit is a mos transistor switching circuit.
3. The power output control circuit with the forced stopping function according to claim 2, wherein a triode and a mos tube are arranged in the mos tube switching circuit, wherein a base electrode of the triode is connected to an output pin of the nor gate, a collector electrode of the triode is connected to a power input end, an emitter electrode of the triode is grounded, a grid electrode of the mos tube is connected to the collector electrode of the triode, a source electrode of the mos tube is connected to the power input end, and a drain electrode of the mos tube is connected to the electrical element.
4. A power output control circuit with a power stop function according to claim 3, wherein the voltage at the power input terminal is 20-30v.
5. The power output control circuit with the forced stopping function according to claim 1, wherein the trigger signal input end is connected with the capacitor C3 and then connected with an input pin of the monostable trigger, and one end of the capacitor C3 connected with the input pin of the monostable trigger is also connected with a shielding signal input end.
6. The power output control circuit with the strong stopping function according to claim 1, wherein the strong stopping signal input end is connected with the input pin grounded by a nor gate through a current stabilizing diode.
7. A power supply device comprising a voltage source, a power supply output control circuit for controlling the output of the voltage source, characterized in that the power supply output control circuit is the power supply output control circuit as claimed in any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320309676.3U CN219659576U (en) | 2023-02-24 | 2023-02-24 | Power output control circuit with forced stopping function and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320309676.3U CN219659576U (en) | 2023-02-24 | 2023-02-24 | Power output control circuit with forced stopping function and power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659576U true CN219659576U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320309676.3U Active CN219659576U (en) | 2023-02-24 | 2023-02-24 | Power output control circuit with forced stopping function and power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659576U (en) |
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2023
- 2023-02-24 CN CN202320309676.3U patent/CN219659576U/en active Active
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