CN216146084U - On-off control circuit, device and electronic equipment - Google Patents
On-off control circuit, device and electronic equipment Download PDFInfo
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- CN216146084U CN216146084U CN202122034547.1U CN202122034547U CN216146084U CN 216146084 U CN216146084 U CN 216146084U CN 202122034547 U CN202122034547 U CN 202122034547U CN 216146084 U CN216146084 U CN 216146084U
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Abstract
The application relates to an on-off control circuit, a device and electronic equipment, wherein the circuit comprises a reference voltage unit, a voltage conversion regulating module and a detection comparing module, wherein the reference voltage unit is used for converting power supply voltage into reference voltage; the voltage conversion adjusting module is used for adjusting the impedance value of the voltage conversion adjusting module according to the power supply voltage and the voltage adjusting instruction and outputting a target voltage through the switch unit; the detection comparison module is electrically connected with the reference voltage unit, the voltage conversion adjustment module and the switch unit and is used for generating detection voltage according to the target voltage, comparing the reference voltage with the detection voltage and controlling the switch state of the switch unit according to the comparison result, so that the condition that the target voltage exceeding the preset threshold voltage is output to a chip in a load to cause the chip to be damaged because the output target voltage is greater than or equal to the preset threshold voltage is avoided.
Description
Technical Field
The present disclosure relates to electronic circuits, and particularly to an on-off control circuit, an on-off control device and an electronic apparatus.
Background
With the rapid development of electronic technology, the precision of chips is higher and higher, and the precision requirement of chips on input voltage is higher and higher, for example: many chips require an input voltage of less than or equal to 5V. If the input voltage exceeds the voltage-bearing range of the chip, the chip can be damaged.
Moreover, engineers may calculate errors in the process of designing the input voltage of the chip, weld resistance errors occur in the process of welding the circuit board, accuracy errors of the used resistance may be large, and other uncertain factors cause that the chip is damaged due to too high output voltage, chip loss is caused, and reliability of the manufactured electronic product is affected.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an on-off control circuit, an apparatus and an electronic device to solve the above problems in the background art, so as to intelligently and accurately output a required target voltage according to a user requirement and avoid a situation that the output target voltage exceeds a preset threshold voltage.
In order to achieve the above and other objects, an aspect of the present application provides an on-off control circuit, including a reference voltage unit, a switching unit, a voltage conversion adjustment module, and a detection comparison module, wherein the reference voltage unit is configured to convert a power supply voltage into a reference voltage; the voltage conversion adjusting module is electrically connected with the reference voltage unit and the switch unit and is used for adjusting the impedance value of the voltage conversion adjusting module according to the power supply voltage and the voltage adjusting instruction and outputting a target voltage through the switch unit; the detection comparison module is electrically connected with the reference voltage unit, the voltage conversion regulation module and the switch unit and is used for acquiring detection voltage according to the target voltage, comparing the reference voltage with the detection voltage and controlling the on-off state of the switch unit according to the comparison result.
In the on-off control circuit in the above embodiment, a reference voltage unit is arranged to convert a power supply voltage into a reference voltage, a voltage conversion adjustment module is arranged to adjust an impedance value of the voltage conversion adjustment module according to the power supply voltage and a voltage adjustment instruction, and a target voltage is output through a switch unit, so that a detection comparison module can generate a detection voltage according to the target voltage, compare the reference voltage with the detection voltage, and control a switch state of the switch unit according to a comparison result, the target voltage is output through the switch unit when the reference voltage is greater than the detection voltage, and the switch unit is controlled to be turned off when the reference voltage is less than or equal to the detection voltage, thereby avoiding outputting the target voltage exceeding a preset threshold voltage to a chip in a load. Therefore, the required target voltage can be intelligently and accurately output according to the user requirement, the condition that the reference voltage is larger than the detection voltage and the target voltage is output through the switch unit is avoided, the reference voltage is smaller than or equal to the detection voltage and the switch unit is controlled to be disconnected, the target voltage exceeding the preset threshold voltage is output to the chip in the load, and the condition that the chip is damaged due to the fact that the output target voltage is larger than or equal to the preset threshold voltage is avoided.
In one embodiment, the voltage conversion and regulation module comprises a voltage conversion unit and a voltage regulation unit, wherein the voltage conversion unit is used for converting the power supply voltage into a feedback voltage; the voltage adjusting unit is electrically connected with the voltage converting unit, the first input end of the detection comparing module and the switch unit, and is used for adjusting the impedance value of the voltage converting and adjusting module according to the feedback voltage and the voltage adjusting instruction, generating a target voltage and outputting the target voltage through the first output end of the switch unit. The required target voltage is intelligently and accurately output according to the user requirement, and the condition that the chip is damaged due to the fact that the output target voltage exceeds the preset threshold voltage is avoided.
In one embodiment, the voltage adjusting unit comprises a first voltage dividing resistor and a first adjustable resistor, and the voltage converting unit is electrically connected with the detection comparing module through the first voltage dividing resistor; the voltage conversion unit is grounded through the first adjustable resistor, so that the first adjustable resistor can adjust the impedance value of the voltage conversion adjusting module according to a voltage adjusting instruction, and the voltage conversion adjusting module can intelligently and accurately output a target voltage smaller than a preset threshold voltage.
In one embodiment, the voltage conversion unit includes a voltage converter and a freewheeling diode, the voltage converter being configured to: the first input end is grounded, the first output end is electrically connected with the voltage regulating unit through a first inductor, the second output end is electrically connected with the voltage regulating unit, the second input end is electrically connected with the reference voltage unit, and the third input end is electrically connected with the second input end of the voltage converter through a first capacitor; the freewheel diode is configured to: the cathode is electrically connected with the first output end of the voltage converter, and the anode is grounded. The voltage converter is used for converting the power supply voltage into the feedback voltage, so that the voltage adjusting unit adjusts the impedance value of the voltage conversion adjusting module according to the feedback voltage and the voltage adjusting instruction and accurately generates the required target voltage.
In one embodiment, the detection and comparison module comprises a detection unit and a comparison unit, wherein the detection unit is electrically connected with the voltage conversion and adjustment module and is used for generating the detection voltage according to the target voltage; the comparison unit is electrically connected with the detection unit, the reference voltage unit and the switch unit and used for comparing the reference voltage with the detection voltage, generating a switch control signal according to a comparison result, controlling the switch state of the switch unit, outputting a target voltage through the switch unit under the condition that the reference voltage is greater than the detection voltage, and controlling the switch unit to be switched off under the condition that the reference voltage is less than or equal to the detection voltage so as to avoid outputting the target voltage exceeding the preset threshold voltage to a chip in a load.
In one embodiment, the detection unit includes a second voltage dividing resistor and a third voltage dividing resistor, and the second voltage dividing resistor is configured to: one end of the voltage regulating power supply is electrically connected with the voltage regulating power supply, and the other end of the voltage regulating power supply is electrically connected with the first input end of the comparison unit; the third voltage dividing resistor is configured to: one end of the comparison unit is electrically connected with the other end of the second voltage-dividing resistor and the first input end of the comparison unit, and the other end of the comparison unit is grounded. The detection voltage is set by setting the ratio of the second voltage-dividing resistor to the third voltage-dividing resistor, so that the condition that the comparison result of the detection voltage and the reference voltage is not unique is avoided.
In one embodiment, the comparison unit comprises a comparator configured to: the first input end is electrically connected with the detection unit, the second input end is electrically connected with the reference voltage unit, and the output end outputs the switch control signal. The comparator controls the switch unit to output a target voltage under the condition that the reference voltage is greater than the detection voltage, and controls the switch unit to be switched off under the condition that the reference voltage is less than or equal to the detection voltage, so that the target voltage exceeding the preset threshold voltage is prevented from being output to a chip in the load.
In one embodiment, the reference voltage unit includes a fourth voltage-dividing resistor and a fifth voltage-dividing resistor, and the fourth voltage-dividing resistor is configured to: one end of the voltage converter is electrically connected with the power supply voltage and the second input end of the voltage converter, and the other end of the voltage converter is electrically connected with the second input end of the detection comparison module; the fifth voltage-dividing resistor is configured to: one end of the comparator is electrically connected with the other end of the fourth voltage-dividing resistor and the second input end of the comparator, and the other end of the comparator is grounded.
In one embodiment, the third voltage dividing resistor comprises a second adjustable resistor configured to: one end of the comparison unit is electrically connected with the other end of the second voltage-dividing resistor and the first input end of the comparison unit, and the other end of the comparison unit is grounded.
In one embodiment, the on-off control circuit further comprises a warning circuit, and the warning circuit is electrically connected with the switch unit; the switching unit is configured to: if the state is the first state, the warning circuit is disconnected, and the switch unit outputs the target voltage; if the state is the second state, the warning circuit is communicated and sends out warning information, so that the warning circuit sends out the warning information to warn a user that the actually output target voltage value is larger than or equal to the preset threshold voltage.
In one embodiment, the alert circuit includes a light emitting diode configured to: the anode is electrically connected with the second output end of the switch unit, the cathode is grounded, and when the switch unit is in the second state, the light-emitting diode emits warning light to warn a user that the actually output target voltage value is larger than or equal to the preset threshold voltage.
In one embodiment, the switching unit includes a relay configured to: the output end of the comparator is grounded through a coil of the comparator; the first switch is configured to: one end of the voltage conversion unit is used as an output end of the target voltage, and the other end of the voltage conversion unit is electrically connected with the voltage conversion unit; the second switch is configured to: one end of the first switch is electrically connected with the other end of the first switch, and the other end of the first switch is grounded through the light-emitting diode; the detection comparison module is configured to: if the reference voltage is less than or equal to the detection voltage, the coil of the relay is electrified, so that the switch unit is changed into a second state from a first state, or if the reference voltage is greater than the detection voltage, the coil of the relay is powered off, and the switch unit maintains the first state or is changed into the first state from the second state; the first state is that the first switch is turned off and the second switch is turned off, and the second state is that the first switch is turned off and the second switch is turned off.
Another aspect of the present application provides a constant voltage output apparatus, including any of the on-off control circuits described in the embodiments of the present application, for outputting a target voltage.
The electronic device comprises a shell and the on-off control circuit in any embodiment of the application, wherein the on-off control circuit is at least partially positioned in the accommodating space of the shell.
In the above constant voltage output device or electronic device, by setting the reference voltage unit to convert the power voltage into the reference voltage, and setting the voltage conversion adjustment module to adjust the impedance value of the voltage conversion adjustment module according to the power voltage and the voltage adjustment instruction and output the target voltage through the switch unit, so that the detection comparison module can generate the detection voltage according to the target voltage, compare the reference voltage with the detection voltage, and control the on-off state of the switch unit according to the comparison result, output the target voltage through the switch unit in the case where the reference voltage is greater than the detection voltage, and control the switch unit to be turned off in the case where the reference voltage is less than or equal to the detection voltage, the target voltage exceeding the preset threshold voltage thereof is prevented from being output to the chip in the load, and unnecessary economic loss is prevented from being generated, and the reliability of the manufactured electronic product is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.
Fig. 1 is a schematic circuit diagram of an on-off control circuit provided in a first embodiment of the present application;
FIG. 2 is a schematic circuit diagram of an on-off control circuit according to a second embodiment of the present disclosure;
FIG. 3 is a schematic circuit diagram of an on-off control circuit provided in a third embodiment of the present application;
FIG. 4 is a schematic circuit diagram of an on-off control circuit provided in a fourth embodiment of the present application;
FIG. 5 is a schematic circuit diagram of an on-off control circuit provided in a fifth embodiment of the present application;
fig. 6 is a schematic structural diagram of a rotating disc type resistance regulator provided in an embodiment of the present application;
fig. 7 is a circuit diagram of an on/off control circuit provided in an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Description of reference numerals:
100. an on-off control circuit; 10. a reference voltage unit; 20. a voltage conversion regulation module; 30. a detection comparison module; 40. a switch unit; 21. a voltage conversion unit; 22. a voltage regulating unit; 221. a first voltage dividing resistor; 222. a first adjustable resistor; 31. a detection unit; 32. a comparison unit; 50. a warning circuit; 200. a load; 300. a supply voltage; 400. an electronic device; 401. a housing.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.
In this application, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are used broadly and encompass, for example, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1, in an embodiment of the present application, an on-off control circuit 100 is provided, which includes a reference voltage unit 10, a voltage conversion adjustment module 20, a detection comparison module 30, and a switch unit 40, wherein the reference voltage unit 10 is configured to convert a power voltage 300 into a reference voltage; the voltage conversion adjustment module 20 is configured to adjust an impedance value of the voltage conversion adjustment module 20 according to the power supply voltage 300 and the voltage adjustment instruction and output a target voltage to the load 200 through the switch unit 40; the detection comparing module 30 is electrically connected to the reference voltage unit 10, the voltage conversion adjusting module 20 and the switching unit 40, and is configured to generate a detection voltage according to the target voltage, compare the reference voltage with the detection voltage, and control a switching state of the switching unit 40 according to a comparison result.
As an example, continuing to refer to fig. 1, by setting the reference voltage unit 10 to convert the power voltage 300 into the reference voltage, and setting the voltage conversion adjustment module 20 to adjust the impedance value of the voltage conversion adjustment module 20 according to the power voltage 300 and the voltage adjustment instruction, and outputting the target voltage through the switch unit 40, the detection comparison module 30 can generate a detection voltage according to the target voltage, compare the reference voltage with the detection voltage, and control the switching state of the switch unit 40 according to the comparison result, output the target voltage through the switch unit 40 in the case that the reference voltage is greater than or equal to the detection voltage, and control the switch unit 40 to disconnect the electrical connection with the load 200 in the case that the reference voltage is less than the detection voltage, so as to avoid outputting the target voltage exceeding the preset threshold voltage to the chip in the load 200. Therefore, the required target voltage can be intelligently and accurately output according to the requirement of a user, the target voltage is output through the switch unit 40 under the condition that the reference voltage is greater than or equal to the detection voltage, the switch unit 40 is controlled to be switched off under the condition that the reference voltage is less than the detection voltage, and the condition that the target voltage exceeding the preset threshold voltage is output to the chip in the load 200 to cause the condition that the chip is damaged because the output target voltage is greater than or equal to the preset threshold voltage is avoided.
As an example, referring to fig. 2, the voltage conversion and adjustment module 20 includes a voltage conversion unit 21 and a voltage adjustment unit 22, wherein the voltage conversion unit 21 is configured to convert the power voltage 300 into a feedback voltage; the voltage adjusting unit 22 is electrically connected to the voltage converting unit 21, the first input terminal of the detection comparing module 30, and the input terminal of the switching unit 40, and is configured to adjust the impedance value of the voltage converting and adjusting module 20 according to the feedback voltage and the voltage adjusting instruction, generate a target voltage, and output the target voltage through the first output terminal of the switching unit 40, so as to achieve intelligent and accurate output of the required target voltage according to the user requirement, and avoid a situation that the chip is damaged due to the output target voltage exceeding a preset threshold voltage.
As an example, referring to fig. 3, the voltage adjusting unit 22 includes a first voltage dividing resistor 221 and a first adjustable resistor 222, and the feedback voltage output terminal of the voltage converting unit 21 outputs the target voltage through the first voltage dividing resistor 221; the feedback voltage output end of the voltage conversion unit 21 is grounded via the first adjustable resistor 222, so that the first adjustable resistor 222 can adjust the impedance value of the voltage conversion adjustment module 20 according to the voltage adjustment instruction, and the voltage conversion adjustment module 20 can intelligently and accurately output the target voltage smaller than the preset threshold voltage.
As an example, referring to fig. 4, the detection and comparison module 30 includes a detection unit 31 and a comparison unit 32, wherein the detection unit 31 is electrically connected to the voltage conversion and adjustment module 20 and is configured to generate a detection voltage according to a target voltage; the comparing unit 32 is electrically connected to the detecting unit 31, the reference voltage unit 10 and the switching unit 40, and configured to compare the reference voltage with the detected voltage, generate a switching control signal according to the comparison result, control the switching state of the switching unit 40, output a target voltage through the switching unit 40 when the reference voltage is greater than or equal to the detected voltage, and control the switching unit 40 to be turned off when the reference voltage is less than the detected voltage, so as to avoid outputting the target voltage exceeding a preset threshold voltage to a chip in the load.
As an example, referring to fig. 5, the on-off control circuit 100 further includes a warning circuit 50, and the warning circuit 50 is electrically connected to the switch unit 40; the switching unit 40 is configured to: if the state is the first state, outputting a target voltage; if the voltage is in the second state, the warning circuit 50 is connected to send warning information to the warning circuit 50 to warn the user that the actually output target voltage value is greater than or equal to the preset threshold voltage. The first state may be set to a normally-off state, and the target voltage may be output via the switching unit 40 in a case where the reference voltage is greater than or equal to the detection voltage; the second state is set to be a normally open state, and the switching unit 40 is controlled to be turned off when the reference voltage is less than the detection voltage, so as to prevent the target voltage exceeding the preset threshold voltage from being output to the chip in the load 200.
By way of example, referring to fig. 6, the first adjustable resistor 222 may be a rotating disc type resistance adjuster; the amplitude of the target voltage may be set to change in a positive or negative proportional relationship with the impedance value of the rotating resistance disc regulator, so as to input a voltage regulation instruction via the rotating resistance disc regulator, so as to control the voltage conversion regulation module to output the corresponding target voltage by regulating the impedance value of the first adjustable resistor 222.
By way of example, with continued reference to fig. 6, a plurality of different voltage values and knobs are provided on the rotating disc type resistance adjuster; the rotating disc resistance adjuster is configured to: and acquiring a voltage adjusting instruction related to the voltage value according to the voltage value indicated by the knob, adjusting the impedance value of the voltage conversion adjusting module and outputting a corresponding target voltage through the switch unit.
As an example, referring to fig. 7, the voltage converting unit 21 includes a voltage converter U1 and a freewheeling diode D1, the voltage converter U1 is configured to: the first input terminal 1 is grounded, the first output terminal 3 is electrically connected with the target voltage Vout through the first inductor L1, the second output terminal 2 is a feedback voltage output terminal, the second input terminal 5 is electrically connected with the power supply voltage VCC1, and the third input terminal 4 is electrically connected with the second input terminal 5 of the voltage converter U1 through the first capacitor C3; the freewheeling diode D1 is configured to: the cathode is electrically connected to the first output terminal 3 of the voltage converter U1 and the anode is grounded. The power supply voltage 300 is converted into the feedback voltage by the voltage converter U1, so that the voltage regulating unit 22 regulates the impedance value of the voltage conversion regulating module according to the feedback voltage and the voltage regulation instruction and accurately generates the required target voltage Vout.
As an example, with continued reference to fig. 7, the detecting unit 31 includes a second voltage-dividing resistor R5 and a third voltage-dividing resistor R6, and the target voltage Vout is electrically connected to the first input terminal 5 of the comparing unit 32 via the second voltage-dividing resistor R5; the first input 5 of the comparison unit 32 is connected to ground via a third voltage-dividing resistor R6. In the case of the reference voltage determination, the preset threshold voltage of the output target voltage Vout may be set by setting the ratio of the second voltage-dividing resistor R5 to the third voltage-dividing resistor R6, so as to avoid the situation that the output target voltage exceeds the preset threshold voltage. In some embodiments of the present application, the third voltage dividing resistor R6 may be configured to include a second adjustable resistor, which may be configured to: one end of the first voltage-dividing resistor is electrically connected with the other end of the second voltage-dividing resistor R5 and the first input end of the comparison unit 32, and the other end of the first voltage-dividing resistor R5 is grounded; the detection voltage is set by adjusting the resistance value of the second adjustable resistor, so that the condition that the comparison result of the detection voltage and the reference voltage is not unique is avoided. As an example, continuing to refer to fig. 7, the comparison unit 32 includes a comparator U2, the comparator U2 configured to: the first input terminal 5 is electrically connected to the detection unit 31, the second input terminal 6 is electrically connected to the reference voltage unit 10, and the output terminal 7 outputs a switch control signal. The comparator U2 controls the switching unit to output the target voltage if the reference voltage is greater than or equal to the detection voltage, and controls the switching unit to turn off if the reference voltage is less than the detection voltage, preventing the target voltage exceeding its preset threshold voltage from being output to the chip in the load 200.
By way of example, with continued reference to fig. 7, the alert circuit 50 includes a light emitting diode D2, the light emitting diode D2 configured to: the anode is electrically connected with the second output end 4 of the switch unit and is used for emitting warning light when the switch unit is in the second state so as to warn a user that the actually output target voltage value is greater than or equal to the preset threshold voltage.
As an example, continuing to refer to fig. 7, the switch unit includes a relay configured to: the output 7 of the comparator U2 is connected to ground via the coil M, and the first switch K1 is configured to: one end of the voltage conversion unit is used as the output end of the target voltage Vout, and the other end of the voltage conversion unit is electrically connected with the voltage conversion unit; the second switch K2 is configured to: one end of the first switch K1 is electrically connected with the other end of the first switch K1, and the other end of the first switch K1 is grounded through the light-emitting diode D2; the comparator U2 is configured to: if the reference voltage is less than or equal to the detection voltage, electrifying a coil M of the relay to enable the switch unit to be changed from the first state to the second state; or if the reference voltage is greater than the detection voltage, the coil M of the relay is powered off, and the switch unit maintains the first state or is changed from the second state to the first state; wherein the first state is that the first switch K1 is closed and the second switch K2 is open, and the second state is that the first switch K1 is open and the second switch K2 is closed.
By way of example, continuing with reference to fig. 7, voltage converter U1 may be set to model XL4016 and voltage converter U1 may be set to model XL 4016. The supply voltage VCC1 may be set to 12V.
As an example, referring to fig. 7, R4 is an adjustable resistor, when the impedance value of R4 is set, for example, R4 is 2.8K Ω, R1 is 4.7K Ω, R2 is 1K Ω, R3 is 4.7K Ω, R5 is 4.7K Ω, R6 is 5.1K Ω, the feedback voltage VFB output by the pin 2 of the voltage converter U1 is 1.25V, Vout is VFB (R4+ R3)/R4 is 1.25 (2.8+4.7)/2.8 is 3.34V, the detection voltage Vin 5 input by the pin 5 of the comparator U2 is R6862 Vout/(R6+ R5) is 5.1+ 3.34.1 + VCC 1+ VCC 3.7V, and the comparison result is that the load voltage V7 + 7V + V × 3.7V + V × the reference voltage V7 is output by the comparator U2 and the load 367 is 2V + 867V + 3V + 7V + V. If an abnormality occurs, for example, the resistance values of R3 and R4 are set incorrectly, or the assembly is incorrect, or the amplitude of Vout exceeds 4.1V due to an internal short circuit of the voltage converter U1, the detection voltage Vin1 input to the pin 5 of the comparator U2 is R6 Vout/(R6+ R5) is 5.1 × 4.1/(5.1+4.7) is 2.13V, Vin2 is < Vin1, the output voltage of the pin 7 of the comparator U2 is 12V, the relay K1 operates, the normally closed contacts 3 and 5 of the relay K1 are opened, so that the rear-stage load is powered off, and the chip in the rear-stage load is protected; and, the normally open contacts 4, 6 of the relay K1 are closed, the LED D2 lights up, and the user is warned that the power supply voltage is faulty. If the amplitude of Vout is less than 4.1V, the relay K1 recovers to the normally closed state, and the normal power supply is recovered. In the case of the reference voltage determination, the detection voltage may be set by setting the ratio of the second voltage dividing resistor R5 to the third voltage dividing resistor R6, so as to avoid the situation that the comparison result between the detection voltage and the reference voltage is not unique.
Therefore, the present embodiment can effectively prevent a target voltage exceeding a preset threshold voltage from being input to a chip in a subsequent load, avoid unnecessary economic loss, and improve the reliability of a manufactured electronic product.
As an example, the comparator U2 may be set to model TL082 CDR.
As an example, the adjusting impedance knob of the resistor R4 may be encapsulated with a voltage value dial, rotated to different positions, corresponding to different resistance values of R4, and corresponding to different target voltages, to achieve the target voltage output by the voltage dial adjustment.
In an embodiment of the present application, a constant voltage output apparatus is provided, which includes the on-off control circuit 100 in any embodiment of the present application, and is configured to output a corresponding target voltage according to a voltage regulation command.
As an example, referring to fig. 8, the present application provides an electronic device 400, which includes a housing 401 and the on-off control circuit 100 in any embodiment of the present application, where the on-off control circuit 100 is at least partially located in an accommodating space of the housing.
The power supply voltage 300 is converted into the reference voltage by the reference voltage unit 10, the voltage conversion adjusting module 20 is arranged to adjust the impedance value of the voltage conversion adjusting module 20 according to the power supply voltage 300 and the voltage adjusting instruction and output the target voltage through the switch unit 40, so that the detection comparing module 30 can generate the detection voltage according to the target voltage, compare the reference voltage with the detection voltage, and control the switch state of the switch unit 40 according to the comparison result, the target voltage is output through the switch unit 40 under the condition that the reference voltage is greater than or equal to the detection voltage, and the switch unit 40 is controlled to be switched off under the condition that the reference voltage is less than the detection voltage, thereby avoiding outputting the target voltage exceeding the preset threshold voltage to the chip in the rear-stage circuit, avoiding generating unnecessary economic loss, and improving the reliability of the manufactured electronic product.
In one embodiment of the present application, the electronic device may include at least one of a medical device, a smart terminal, a smart wearable device, or the like.
It should be noted that the above-mentioned embodiments are only for illustrative purposes and are not meant to limit the present invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. An on-off control circuit, comprising:
a reference voltage unit for converting a power supply voltage into a reference voltage;
a switch unit;
the voltage conversion adjusting module is electrically connected with the reference voltage unit and the switch unit and used for adjusting the impedance value of the voltage conversion adjusting module according to the power supply voltage and the voltage adjusting instruction and outputting a target voltage through the switch unit;
and the detection comparison module is electrically connected with the reference voltage unit, the voltage conversion regulation module and the switch unit and is used for acquiring detection voltage according to the target voltage, comparing the reference voltage with the detection voltage and controlling the on-off state of the switch unit according to the comparison result.
2. The on-off control circuit of claim 1, wherein the voltage conversion regulation module comprises:
a voltage conversion unit for converting the power supply voltage into a feedback voltage;
and the voltage regulating unit is electrically connected with the voltage conversion unit, the first input end of the detection comparison module and the switch unit, and is used for regulating the impedance value of the voltage regulating unit according to the feedback voltage and the voltage regulating instruction, generating a target voltage and outputting the target voltage through the switch unit.
3. The on-off control circuit according to claim 2, wherein said voltage regulating unit comprises:
the voltage conversion unit is electrically connected with the detection comparison module through the first voltage dividing resistor;
the voltage conversion unit is grounded through the first adjustable resistor and is used for adjusting the impedance value of the first adjustable resistor according to the feedback voltage and a voltage adjusting instruction.
4. The on-off control circuit according to claim 2, wherein said voltage conversion unit comprises:
a voltage converter configured to: the first input end is grounded, the first output end is electrically connected with the voltage regulating unit through a first inductor, the second output end is electrically connected with the voltage regulating unit, the second input end is electrically connected with the reference voltage unit, and the third input end is electrically connected with the second input end of the voltage converter through a first capacitor;
a freewheeling diode configured to: the cathode is electrically connected with the first output end of the voltage converter, and the anode is grounded.
5. The on-off control circuit of claim 4, wherein the detection comparison module comprises:
the detection unit is electrically connected with the voltage conversion and adjustment module and is used for acquiring the detection voltage;
and the comparison unit is electrically connected with the detection unit, the reference voltage unit and the switch unit and is used for comparing the reference voltage with the detection voltage and generating a switch control signal according to a comparison result so as to control the switch state of the switch unit.
6. The on-off control circuit according to claim 5, wherein said detection unit comprises:
a second voltage-dividing resistor configured to: one end of the voltage regulating power supply is electrically connected with the voltage regulating power supply, and the other end of the voltage regulating power supply is electrically connected with the first input end of the comparison unit;
a third voltage dividing resistor configured to: one end of the comparison unit is electrically connected with the other end of the second voltage-dividing resistor and the first input end of the comparison unit, and the other end of the comparison unit is grounded.
7. The on-off control circuit according to claim 5, wherein said comparing unit comprises:
a comparator configured to: the first input end is electrically connected with the detection unit, the second input end is electrically connected with the reference voltage unit, and the output end outputs the switch control signal.
8. The on-off control circuit according to claim 7, wherein said reference voltage unit comprises:
a fourth voltage dividing resistor configured to: one end of the voltage converter is electrically connected with the power supply voltage and the second input end of the voltage converter, and the other end of the voltage converter is electrically connected with the second input end of the detection comparison module;
a fifth voltage-dividing resistor configured to: one end of the comparator is electrically connected with the other end of the fourth voltage-dividing resistor and the second input end of the comparator, and the other end of the comparator is grounded.
9. The on-off control circuit of claim 6, wherein the third voltage dividing resistor comprises:
a second tunable resistor configured to: one end of the comparison unit is electrically connected with the other end of the second voltage-dividing resistor and the first input end of the comparison unit, and the other end of the comparison unit is grounded.
10. The on-off control circuit of claim 7, further comprising:
the warning circuit is electrically connected with the switch unit;
the switching unit is configured to: if the state is the first state, the warning circuit is disconnected, and the switch unit outputs the target voltage; if the state is the second state, the warning circuit is communicated and warning information is sent out.
11. The on-off control circuit of claim 10, wherein the warning circuit comprises:
a light emitting diode configured to: the anode is electrically connected with the second output end of the switch unit, the cathode is grounded, and when the switch unit is in the second state, the light emitting diode emits warning light.
12. The on-off control circuit according to claim 11, wherein said switching unit comprises:
a relay configured to: the output end of the comparator is grounded through a coil of the comparator;
a first switch configured to: one end of the voltage conversion unit is used as an output end of the target voltage, and the other end of the voltage conversion unit is electrically connected with the voltage conversion unit;
a second switch configured to: one end of the first switch is electrically connected with the other end of the first switch, and the other end of the first switch is grounded through the light-emitting diode;
the detection comparison module is configured to: if the reference voltage is less than or equal to the detection voltage, the coil of the relay is electrified, so that the switch unit is changed into a second state from a first state, or if the reference voltage is greater than the detection voltage, the coil of the relay is powered off, and the switch unit maintains the first state or is changed into the first state from the second state;
the first state is that the first switch is turned off and the second switch is turned off, and the second state is that the first switch is turned off and the second switch is turned off.
13. A constant-voltage output apparatus, comprising:
an on-off control circuit as claimed in any one of claims 1 to 12 for outputting a target voltage.
14. An electronic device, comprising:
a housing;
the on-off control circuit as claimed in any one of claims 1-12, located at least partially within the receiving space of said housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122034547.1U CN216146084U (en) | 2021-08-26 | 2021-08-26 | On-off control circuit, device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122034547.1U CN216146084U (en) | 2021-08-26 | 2021-08-26 | On-off control circuit, device and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN216146084U true CN216146084U (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122034547.1U Active CN216146084U (en) | 2021-08-26 | 2021-08-26 | On-off control circuit, device and electronic equipment |
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| Country | Link |
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| CN (1) | CN216146084U (en) |
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2021
- 2021-08-26 CN CN202122034547.1U patent/CN216146084U/en active Active
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Effective date of registration: 20221212 Address after: 215000 part of No.3 Factory building, 112 Fangzhong street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Suzhou minimally invasive rehabilitation medical technology (Group) Co.,Ltd. Address before: 200135 Shanghai Shentai Medical Technology Co., Ltd., floor 5, building 8, Lane 500, Furonghua Road, Zhoupu Town, Pudong New Area, Shanghai Patentee before: Shanghai Shentai Medical Technology Co.,Ltd. |