CN219552886U - Protection circuit - Google Patents
Protection circuit Download PDFInfo
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- CN219552886U CN219552886U CN202320201179.1U CN202320201179U CN219552886U CN 219552886 U CN219552886 U CN 219552886U CN 202320201179 U CN202320201179 U CN 202320201179U CN 219552886 U CN219552886 U CN 219552886U
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Abstract
The utility model provides a protection circuit, which is applied to the technical field of circuits and is used for changing the energy state of an external circuit, and the protection circuit comprises: a voltage stabilizing unit and an executing unit; the cathode end of the voltage stabilizing unit is used for being connected with the positive end of an external circuit, and the anode end of the voltage stabilizing unit is used for being connected with the negative end of the external circuit; the execution unit is connected with the voltage stabilizing unit; when the voltage of the positive electrode end of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, and the executing unit executes a first action; when the voltage of the positive electrode terminal of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, and the executing unit executes a second action; the second preset voltage is smaller than the first preset voltage. The protection circuit provided by the utility model can effectively avoid the damage of the performance of circuit components caused by circuit energy.
Description
Technical Field
The utility model belongs to the technical field of circuits, and particularly relates to a protection circuit.
Background
The energy in a circuit is unstable, and on the basis, the performance of components in the circuit and the performance of components in related circuits of the circuit are influenced by the excessive or insufficient energy in the circuit.
Therefore, in order to prevent the performance of the components from being damaged, the utility model provides a protection circuit.
Disclosure of Invention
The utility model aims to provide a protection circuit to solve the technical problem that the performance of components is damaged due to circuit energy in the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: there is provided a protection circuit for changing an energy state of an external circuit, the protection circuit comprising:
a voltage stabilizing unit and an executing unit;
the cathode end of the voltage stabilizing unit is used for being connected with the anode end of the external circuit, and the anode end of the voltage stabilizing unit is used for being connected with the cathode end of the external circuit; the execution unit is connected with the voltage stabilizing unit;
when the voltage of the positive electrode terminal of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, and the executing unit executes a first action; when the voltage of the positive electrode terminal of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, and the executing unit executes a second action;
the second preset voltage is smaller than the first preset voltage.
In one possible implementation, the execution unit is a bleeder circuit for bleeder energy to an external circuit; the execution unit includes:
the transistor, the first resistor and the second resistor;
the base electrode of the triode is respectively connected with the anode end of the voltage stabilizing unit and the first end of the first resistor, and the second end of the first resistor is used for being connected with the negative end of an external circuit;
the collector electrode of the triode is connected with the first end of the second resistor, and the second end of the second resistor is used for being connected with the positive end of an external circuit;
the emitter of the triode is used for being connected with the negative terminal of an external circuit;
when the voltage of the positive electrode end of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, the triode is conducted, and the bleeder circuit executes bleeder action; when the voltage of the positive electrode end of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, the triode is cut off, and the bleeder circuit stops the bleeder action.
In one possible implementation manner, the execution unit is an under-voltage protection circuit for under-voltage protection of an external circuit; the execution unit includes:
a first chip circuit and a second chip circuit;
the signal input end of the first chip circuit is connected with the cathode end of the voltage stabilizing unit, and the grounding end of the first chip circuit is connected with the anode end of the voltage stabilizing unit;
the signal output end of the first chip circuit is connected with the feedback input end of the second chip circuit, and the signal output end of the second chip circuit is used for being connected with an energy conversion circuit corresponding to the energy output of the external circuit;
when the voltage of the positive electrode end of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, the first chip circuit sends a first feedback signal to the second chip circuit, and the second chip circuit responds to the first feedback signal to control the energy conversion circuit to be conducted;
when the voltage of the positive electrode terminal of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, and the first chip circuit executes a low-voltage detection action.
In one possible implementation manner, when the voltage of the positive terminal of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, and when the first chip circuit detects that the voltage input to the signal input terminal of the first chip circuit is smaller than a third preset voltage, the first chip circuit sends a second feedback signal to the second chip circuit, and the second chip circuit responds to the second feedback signal and controls the energy conversion circuit to be turned off;
wherein the third preset voltage is less than the second preset voltage.
In one possible implementation, the power input terminal of the second chip circuit is connected to the cathode terminal of the voltage stabilizing unit, and the ground terminal of the second chip circuit is connected to the anode terminal of the voltage stabilizing unit.
In one possible implementation manner, the voltage stabilizing unit includes: at least one zener diode;
when the voltage stabilizing unit comprises a voltage stabilizing diode, the anode end of the voltage stabilizing diode is the anode end of the voltage stabilizing unit, and the cathode end of the voltage stabilizing diode is the cathode end of the voltage stabilizing unit;
when the voltage stabilizing unit comprises at least two voltage stabilizing diodes, each voltage stabilizing diode is connected in series in the forward direction, the anode end of a serial branch is the anode end of the voltage stabilizing unit, and the cathode end of the serial branch is the cathode end of the voltage stabilizing unit;
the series branch refers to a branch formed by connecting the at least two zener diodes in series.
In one possible implementation manner, the voltage stabilizing unit further includes:
and the third resistor is connected in parallel with the two ends of the voltage stabilizing diode.
In one possible implementation manner, the voltage stabilizing unit further includes:
and a fourth resistor connected in series with the zener diode.
The protection circuit provided by the utility model has the beneficial effects that:
the protection circuit comprises a voltage stabilizing unit and an executing unit, when the voltage of the positive electrode end of the external circuit is too large or too small, namely when the energy of the external circuit is too large or too small, the voltage stabilizing unit can be in different states, and the corresponding executing unit can execute different actions to realize circuit protection. The execution unit is connected with the voltage stabilizing unit, and if a voltage sensing point of the execution unit is connected to the anode end of the voltage stabilizing unit, the voltage stabilizing unit can enable the execution unit to quickly sense the energy change of an external circuit so as to react. If the voltage sensing point of the execution unit is connected to the cathode end of the voltage stabilizing unit, the voltage of the two ends of the execution unit can be kept within a certain range by the arrangement of the voltage stabilizing unit, so that the circuit of the execution unit is prevented from being damaged. That is, no matter how the voltage stabilizing unit is connected with the executing unit, the utility model can effectively solve the problems in the prior art through the combination of the voltage stabilizing unit and the executing unit, avoid the damage of the performance of components caused by circuit energy and realize the circuit protection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a protection circuit according to an embodiment of the utility model;
fig. 2 is a schematic structural diagram of a protection circuit according to another embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a protection circuit according to another embodiment of the present utility model.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a protection circuit according to an embodiment of the present utility model, where the protection circuit is used for changing an energy state of an external circuit, and the protection circuit includes:
a voltage stabilizing unit 11 and an executing unit 12.
The cathode terminal of the voltage stabilizing unit 11 is used for being connected with the positive terminal of an external circuit, and the anode terminal of the voltage stabilizing unit 11 is used for being connected with the negative terminal of the external circuit. The execution unit 12 is connected to the voltage stabilizing unit 11.
When the voltage at the positive terminal of the external circuit is greater than the first preset voltage, the voltage stabilizing unit 11 is turned on reversely, and the executing unit 12 executes the first action. When the voltage at the positive terminal of the external circuit is smaller than the second preset voltage, the voltage stabilizing unit 11 is not turned on, and the executing unit 12 executes the second action.
The second preset voltage is smaller than the first preset voltage.
In the present embodiment, the voltage stabilizing unit 11 is a circuit unit including a zener diode, and its entirety exhibits the characteristic of a zener diode.
In this embodiment, the cathode terminal of the voltage stabilizing unit 11 is used to connect to the positive terminal of the external circuit, wherein when the cathode terminal of the voltage stabilizing unit 11 is connected to the positive terminal of the external circuit, it may be directly connected to the positive terminal of the external circuit, or may be connected to the positive terminal of the external circuit through other common components. Similarly, when the anode terminal of the voltage stabilizing unit 11 is connected to the negative terminal of the external circuit, it may be directly connected to the negative terminal of the external circuit, or may be connected to the negative terminal of the external circuit through other common components, which is not limited in this embodiment.
In the present embodiment, the execution unit 12 includes a voltage sensing point for sensing the voltage of the positive terminal of the external circuit. The voltage sensing point may be connected to the anode terminal of the voltage stabilizing unit 11 according to the actual scene, or may be connected to the cathode terminal of the voltage stabilizing unit 11, which is not limited in this embodiment.
In this embodiment, when the voltage at the positive terminal of the external circuit is greater than the first preset voltage, the voltage stabilizing unit 11 is turned on reversely, and the voltage stabilizing unit 11 realizes voltage stabilization at this time, and the voltage sensing point of the executing unit 12 senses the voltage at the positive terminal of the external circuit to execute the first action. When the voltage of the positive terminal of the external circuit is smaller than the second preset voltage, the voltage stabilizing unit 11 is not conducted, the voltage stabilizing unit 11 has no voltage stabilizing effect, and the voltage sensing point of the executing unit 12 senses the voltage of the positive terminal of the external circuit so as to execute the second action. The second action is different from the first action. That is, by the cooperation of the voltage stabilizing unit 11 and the executing unit 12, the executing unit 12 can make different action reactions according to the energy change of the external circuit, so as to realize circuit protection.
As can be seen from the above description, the protection circuit according to the embodiment of the present utility model includes a voltage stabilizing unit and an executing unit, when the voltage of the positive terminal of the external circuit is too high or too low, that is, when the energy of the external circuit is too high or too low, the voltage stabilizing unit is in different states, and the corresponding executing unit executes different actions to realize circuit protection. The execution unit is connected with the voltage stabilizing unit, and if a voltage sensing point of the execution unit is connected to the anode end of the voltage stabilizing unit, the voltage stabilizing unit can enable the execution unit to quickly sense the energy change of an external circuit so as to react. If the voltage sensing point of the execution unit is connected to the cathode end of the voltage stabilizing unit, the voltage of the two ends of the execution unit can be kept within a certain range by the arrangement of the voltage stabilizing unit, so that the circuit of the execution unit is prevented from being damaged. That is, no matter how the voltage stabilizing unit is connected with the executing unit, the embodiment of the utility model can effectively solve the problems in the prior art through the combination of the voltage stabilizing unit and the executing unit, avoid the damage of the performance of components caused by circuit energy, and realize the circuit protection.
In one possible implementation, execution unit 12 may be a bleeder circuit for bleeding energy from an external circuit. As shown in fig. 2, fig. 2 illustrates a structure of a protection circuit using an external circuit as a capacitor. Referring to fig. 2, the execution unit 12 includes:
transistor Q1, first resistor R1 and second resistor R2.
The base electrode of the triode Q1 is respectively connected with the anode end of the voltage stabilizing unit 11 and the first end of the first resistor R1, and the second end of the first resistor R1 is used for being connected with the negative end of an external circuit.
The collector of the triode Q1 is connected with the first end of a second resistor R2, and the second end of the second resistor R2 is used for being connected with the positive end of an external circuit.
The emitter of transistor Q1 is used to connect to the negative terminal of an external circuit.
In this embodiment, when the positive terminal voltage dc+ of the external circuit is greater (i.e., greater than the first preset voltage), the voltage stabilizing unit 11 is turned on reversely, and at this time, the voltage sensing point (i.e., the base of the triode) of the protection circuit senses the positive terminal voltage dc+ of the external circuit, the triode Q1 is turned on, and the bleeder circuit performs the bleeder action. When the voltage dc+ at the positive electrode end of the external circuit is smaller (i.e., smaller than the second preset voltage), the voltage stabilizing unit 11 is not turned on, and at this time, the voltage sensing point (i.e., the base electrode of the triode) of the protection circuit senses the voltage dc+ at the positive electrode end of the external circuit, the triode Q1 is turned off, and the bleeder circuit stops the bleeder action.
In this embodiment, the transistor Q1 may be an NPN transistor.
That is, by applying the scheme of the embodiment, the energy can be automatically discharged when the voltage of the positive electrode terminal of the external circuit is large, and the energy discharge can be automatically stopped when the voltage of the positive electrode terminal of the external circuit is small, so that the influence of the energy storage of the external circuit on the external circuit and related circuits is avoided as much as possible, and the components in the circuit are protected.
In one possible implementation, the execution unit 12 may also be an under-voltage protection circuit for under-voltage protection of an external circuit. As shown in fig. 3, fig. 3 illustrates a configuration of a protection circuit using an external circuit as a power supply circuit (i.e., a dc source and an energy conversion circuit 20 thereof). Referring to fig. 3, the execution unit 12 includes:
the first chip circuit and the second chip circuit.
The signal input end of the first chip circuit is connected with the cathode end of the voltage stabilizing unit 11, and the grounding end of the first chip circuit is connected with the anode end of the voltage stabilizing unit 11.
The signal output end of the first chip circuit is connected with the feedback input end of the second chip circuit, and the signal output end of the second chip circuit is used for being connected with a corresponding energy conversion circuit when the external circuit outputs energy.
When the voltage of the positive terminal of the external circuit is greater than a first preset voltage, the voltage stabilizing unit 11 is reversely conducted, the first chip circuit sends a first feedback signal to the second chip circuit, and the second chip circuit responds to the first feedback signal to control the energy conversion circuit to be conducted.
When the voltage of the positive terminal of the external circuit is smaller than the second preset voltage, the voltage stabilizing unit 11 is not conducted, and the first chip circuit executes the low voltage detection action.
In the present embodiment, the first chip circuit is a circuit constituted by the first chip, and the entire first chip circuit is characterized by the first chip, and may include a resistor, a capacitor, and the like provided for voltage division and current leakage, and the present embodiment is not limited thereto. As shown IN fig. 3, the first chip circuit may include a resistor R3, a capacitor C1, and a first chip IC1, wherein a signal input end (i.e., an IN end) of the first chip IC1 is a signal input end of the first chip circuit, a ground end (i.e., a GND end) of the first chip IC1 is a ground end of the first chip circuit, and a signal output end (i.e., an OUT end) of the first chip IC1 is a signal output end of the first chip circuit.
In this embodiment, the second chip circuit is a circuit formed by the second chip, and the whole second chip circuit is characterized by the second chip, which may also include devices such as resistors and capacitors provided for voltage division and current leakage, and accordingly, besides the ports described in this embodiment, other necessary ports may also be included, and because other ports are not the key points of this embodiment, the description is omitted here. As shown in fig. 3, the second chip circuit may include a resistor R9, a resistor R5, and a second chip IC2, wherein a feedback input end (i.e., FB end) of the second chip IC2 is a feedback input end of the second chip circuit, and a signal output end (i.e., DRV end) of the second chip IC1 is a signal output end of the second chip circuit.
In this embodiment, when the positive terminal voltage dc+ of the external circuit is greater than the first preset voltage, the voltage stabilizing unit 11 is turned on reversely, the first chip circuit sends a first feedback signal to the second chip circuit, and the second chip circuit controls the energy conversion circuit 20 (i.e., the flyback circuit in fig. 3) to be turned on through the switching tube Q2 in response to the first feedback signal. At this time, the direct current source can perform energy output. When the voltage DC+ at the positive electrode end of the external circuit is smaller than the second preset voltage, the voltage stabilizing unit 11 is not conducted, and the first chip circuit executes the low-voltage detection action. At this time, the first chip circuit continuously senses the positive terminal voltage dc+ of the external circuit through the signal input terminal (i.e., the voltage sensing point), and when dc+ is low to a certain extent (i.e., dc+ is smaller than the third preset voltage), the first chip circuit sends a second feedback signal to the second chip circuit, and the second chip circuit responds to the second feedback signal and turns off the energy conversion circuit 20 through the switching tube Q2, thereby stopping the energy output of the DC source. That is, in one possible implementation, when the voltage of the positive terminal of the external circuit is smaller than the second preset voltage, the voltage stabilizing unit is not turned on, and when the first chip circuit detects that the voltage input to the signal input terminal of the first chip circuit is smaller than the third preset voltage, the first chip circuit sends a second feedback signal to the second chip circuit, and the second chip circuit responds to the second feedback signal to control the energy conversion circuit to be turned off. Wherein the third preset voltage is smaller than the second preset voltage.
IN this embodiment, it should be noted that, according to the protection circuit described IN this embodiment, when dc+ is too large (for example, exceeds the fourth preset voltage), the voltage of the IN terminal of the first chip IC1 IN the first chip circuit can be effectively prevented from being too large due to the voltage stabilizing effect of the zener diode Z2 IN the voltage stabilizing unit 11, so that the overvoltage damage of the first chip IC1 can be effectively prevented.
In one possible implementation, the power input terminal of the second chip circuit is connected to the cathode terminal of the voltage stabilizing unit, and the ground terminal of the second chip circuit is connected to the anode terminal of the voltage stabilizing unit.
In this embodiment, referring to fig. 3, the power input terminal (i.e., VCC terminal) of the second chip IC2 is the power input terminal of the second chip circuit, and the ground terminal (i.e., GND terminal) of the second chip IC2 is the ground terminal of the second chip circuit.
Based on the connection structure of the embodiment, when the dc+ voltage is too large (for example, exceeds the fifth preset voltage), the voltage of the VCC terminal of the second chip IC2 in the second chip circuit can be effectively prevented from being too large due to the voltage stabilizing effect of the zener diode Z1 and the zener diode Z2 in the voltage stabilizing unit 11, so that the overvoltage damage of the second chip IC2 can be effectively prevented.
In the above embodiment, it should be noted that, the a end of the circuit a is connected to the B end of the circuit B, which may be directly connected to the a end and the B end, or the a end may be connected to the B end through a resistor or other common components, which are all conventional connection manners in the circuit structure, which is not described in detail in this embodiment.
In one possible implementation, referring to fig. 2 and 3, the voltage stabilizing unit includes: at least one zener diode.
When the voltage stabilizing unit comprises a voltage stabilizing diode, the anode end of the voltage stabilizing diode is the anode end of the voltage stabilizing unit, and the cathode end of the voltage stabilizing diode is the cathode end of the voltage stabilizing unit.
When the voltage stabilizing unit comprises at least two voltage stabilizing diodes, each voltage stabilizing diode is connected in series in the forward direction, the anode end of the serial branch is the anode end of the voltage stabilizing unit, and the cathode end of the serial branch is the cathode end of the voltage stabilizing unit.
The series branch refers to a branch formed by connecting at least two voltage stabilizing diodes in series.
In this embodiment, the voltage stabilizing unit 11 may be composed of one zener diode, two zener diodes connected in series, or a plurality of zener diodes connected in series.
In one possible implementation, referring to fig. 2 and 3, the voltage stabilizing unit further includes:
and the third resistor is connected in parallel with the two ends of the voltage stabilizing diode.
In this embodiment, resistors may be connected in parallel to two ends of the zener diode to ensure the safety of the zener diode.
In one possible implementation, referring to fig. 2 and 3, the voltage stabilizing unit further includes:
and a fourth resistor connected in series with the zener diode.
In this embodiment, a resistor may be connected in series to the zener diode to achieve voltage division.
The present utility model is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present utility model, and these modifications and substitutions are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (8)
1. A protection circuit for changing an energy state of an external circuit, the protection circuit comprising: a voltage stabilizing unit and an executing unit;
the cathode end of the voltage stabilizing unit is used for being connected with the anode end of the external circuit, and the anode end of the voltage stabilizing unit is used for being connected with the cathode end of the external circuit; the execution unit is connected with the voltage stabilizing unit;
when the voltage of the positive electrode terminal of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, and the executing unit executes a first action; when the voltage of the positive electrode terminal of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, and the executing unit executes a second action;
the second preset voltage is smaller than the first preset voltage.
2. The protection circuit of claim 1, wherein the execution unit is a bleeder circuit for bleeding energy from an external circuit; the execution unit includes:
the transistor, the first resistor and the second resistor;
the base electrode of the triode is respectively connected with the anode end of the voltage stabilizing unit and the first end of the first resistor, and the second end of the first resistor is used for being connected with the negative end of an external circuit;
the collector electrode of the triode is connected with the first end of the second resistor, and the second end of the second resistor is used for being connected with the positive end of an external circuit;
the emitter of the triode is used for being connected with the negative terminal of an external circuit;
when the voltage of the positive electrode end of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, the triode is conducted, and the bleeder circuit executes bleeder action; when the voltage of the positive electrode end of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, the triode is cut off, and the bleeder circuit stops the bleeder action.
3. The protection circuit of claim 1, wherein the execution unit is an under-voltage protection circuit for under-voltage protection of an external circuit; the execution unit includes:
a first chip circuit and a second chip circuit;
the signal input end of the first chip circuit is connected with the cathode end of the voltage stabilizing unit, and the grounding end of the first chip circuit is connected with the anode end of the voltage stabilizing unit;
the signal output end of the first chip circuit is connected with the feedback input end of the second chip circuit, and the signal output end of the second chip circuit is used for being connected with an energy conversion circuit corresponding to the energy output of the external circuit;
when the voltage of the positive electrode end of the external circuit is larger than a first preset voltage, the voltage stabilizing unit is reversely conducted, the first chip circuit sends a first feedback signal to the second chip circuit, and the second chip circuit responds to the first feedback signal to control the energy conversion circuit to be conducted;
when the voltage of the positive electrode terminal of the external circuit is smaller than a second preset voltage, the voltage stabilizing unit is not conducted, and the first chip circuit executes a low-voltage detection action.
4. The protection circuit of claim 3, wherein the voltage stabilizing unit is not turned on when the voltage of the positive terminal of the external circuit is smaller than a second preset voltage, and the first chip circuit sends a second feedback signal to the second chip circuit when detecting that the voltage input to the signal input terminal is smaller than a third preset voltage, and the second chip circuit responds to the second feedback signal and controls the energy conversion circuit to be turned off;
wherein the third preset voltage is less than the second preset voltage.
5. The protection circuit of claim 3, wherein a power input terminal of the second chip circuit is connected to a cathode terminal of the voltage stabilizing unit, and a ground terminal of the second chip circuit is connected to an anode terminal of the voltage stabilizing unit.
6. The protection circuit according to any one of claims 1 to 5, wherein the voltage stabilizing unit includes: at least one zener diode;
when the voltage stabilizing unit comprises a voltage stabilizing diode, the anode end of the voltage stabilizing diode is the anode end of the voltage stabilizing unit, and the cathode end of the voltage stabilizing diode is the cathode end of the voltage stabilizing unit;
when the voltage stabilizing unit comprises at least two voltage stabilizing diodes, each voltage stabilizing diode is connected in series in the forward direction, the anode end of a serial branch is the anode end of the voltage stabilizing unit, and the cathode end of the serial branch is the cathode end of the voltage stabilizing unit;
the series branch refers to a branch formed by connecting the at least two zener diodes in series.
7. The protection circuit of claim 6, wherein the voltage stabilizing unit further comprises:
and the third resistor is connected in parallel with the two ends of the voltage stabilizing diode.
8. The protection circuit of claim 6, wherein the voltage stabilizing unit further comprises:
and a fourth resistor connected in series with the zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320201179.1U CN219552886U (en) | 2023-02-13 | 2023-02-13 | Protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320201179.1U CN219552886U (en) | 2023-02-13 | 2023-02-13 | Protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219552886U true CN219552886U (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320201179.1U Active CN219552886U (en) | 2023-02-13 | 2023-02-13 | Protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219552886U (en) |
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2023
- 2023-02-13 CN CN202320201179.1U patent/CN219552886U/en active Active
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