CN219740197U - Power supply protection circuit and electronic equipment - Google Patents
Power supply protection circuit and electronic equipment Download PDFInfo
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- CN219740197U CN219740197U CN202320175665.0U CN202320175665U CN219740197U CN 219740197 U CN219740197 U CN 219740197U CN 202320175665 U CN202320175665 U CN 202320175665U CN 219740197 U CN219740197 U CN 219740197U
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- 239000003990 capacitor Substances 0.000 claims abstract description 49
- 230000001629 suppression Effects 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 22
- 230000033228 biological regulation Effects 0.000 claims description 14
- 230000005856 abnormality Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model discloses a power supply protection circuit and an electronic device. The power supply protection circuit includes: the device comprises a suppression module, an adjustment module and an output module. The suppression module comprises a choke coil, a surge diode and a plurality of capacitors. The adjusting module comprises an overvoltage adjusting unit, an undervoltage adjusting unit and a switch unit; the overvoltage regulating unit, the undervoltage regulating unit and the switching unit are coupled with the output end of the suppression module, the switching unit comprises a voltage stabilizing tube and a switching tube, the positive electrode of the voltage stabilizing tube is coupled with the control end of the switching tube, and the negative electrode of the voltage stabilizing tube is coupled with the first channel end of the switching tube; the output module is coupled with the second path end of the switching tube and is used for supplying power to electric equipment when the switching tube is conducted. By the mode, the adaptability of the power supply protection circuit to more voltages is improved, and the abnormality of the power supply protection circuit caused by voltage mismatch is reduced.
Description
Technical Field
The utility model relates to the technical field of power supply protection, in particular to a power supply protection circuit and electronic equipment.
Background
Related electronic devices in the market at present, such as security base stations, the power input ports of which are damaged for preventing overvoltage, are all added with a power supply protection circuit, such as: for a base station with rated operating voltage of 12V, a current which only allows a certain range of voltage to pass through is added in a 12V path, such as 6.5V-13.6V. Usually, a power tube is used as a switching tube, and a corresponding voltage reference circuit is used as automatic switching control. The circuit has certain surge resistance besides preventing normal direct current overvoltage.
However, the current power supply protection circuit can only ensure that the electronic equipment can work normally when suffering from surge under the rated voltage, and cannot adapt to other non-rated voltages, such as voltages higher than the rated voltage.
Disclosure of Invention
In order to solve the problems, the utility model provides a power supply protection circuit and electronic equipment, which increase the adaptability of the power supply protection circuit to more voltages and reduce the abnormality of the power supply protection circuit caused by voltage mismatch.
In order to solve the technical problems, the utility model adopts a technical scheme that: there is provided a power supply protection circuit including: the suppression module comprises a choke coil, a surge diode and a plurality of capacitors. The first end of the choke coil is used as an input end of the suppression module and is used for receiving an electric signal, the second end of the choke coil is coupled with the negative electrode of the surge diode and the first ends of the capacitors, the surge diode is connected with the capacitors in parallel, and the positive electrode of the surge diode is grounded with the second ends of the capacitors; the adjusting module comprises an overvoltage adjusting unit, an undervoltage adjusting unit and a switch unit; the overvoltage regulating unit, the undervoltage regulating unit and the switching unit are coupled with the output end of the suppression module, the switching unit comprises a voltage stabilizing tube and a switching tube, the positive electrode of the voltage stabilizing tube is coupled with the control end of the switching tube, and the negative electrode of the voltage stabilizing tube is coupled with the first channel end of the switching tube; and the output module is coupled with the second path end of the switching tube and is used for supplying power to electric equipment when the switching tube is conducted.
Wherein, the overvoltage regulating unit includes: the negative electrode of the first diode is coupled with the output end of the suppression module; the control end of the first transistor is coupled with the positive electrode of the first diode, the first channel end of the first transistor is coupled with the undervoltage regulating unit, and the second channel end of the first transistor is grounded.
Wherein the overvoltage regulating unit further comprises: the first end of the first resistor is coupled with the output end of the suppression module, and the second end of the first resistor is coupled with the cathode of the first diode; the first end of the second resistor is coupled with the anode of the first diode, and the second end of the second resistor is coupled with the control end of the first transistor; the first end of the third resistor is coupled with the anode of the first diode, and the second end of the third resistor is grounded.
Wherein, undervoltage adjustment unit includes: the first end of the fourth resistor is coupled with the output end of the suppression module, and the second end of the fourth resistor is coupled with the first channel end of the first transistor; the first end of the fifth resistor is coupled with the second end of the fourth resistor, and the second end of the fifth resistor is grounded; the control end of the second transistor is coupled with the second end of the fourth resistor, the first path end of the second transistor is coupled with the switch unit, and the second path end of the second transistor is grounded.
Wherein, undervoltage adjustment unit still includes: and the first end of the sixth resistor is coupled with the second end of the fourth resistor, and the second end of the sixth resistor is coupled with the control end of the second transistor.
Wherein the switching unit further comprises: the first end of the seventh resistor is coupled with the output end of the suppression module; an eighth resistor, wherein a first end of the eighth resistor is coupled to a second end of the seventh resistor and a first path end of the second transistor, and a second end of the eighth resistor is coupled to a control end of the switching tube; the first capacitor is connected with the voltage stabilizing tube in parallel.
The output module comprises a plurality of capacitors which are connected in parallel, a first end of each capacitor is used as an output end of the output module, and a second end of each capacitor is grounded.
Wherein the surge diode is adapted to the 24V voltage signal.
Wherein the suppression module further comprises: the first end of the grounding capacitor is coupled with the second end of the choke coil, and the second end of the grounding capacitor is grounded; the first end of the grounding resistor is coupled with the first end of the grounding capacitor, and the second end of the grounding resistor is grounded.
In order to solve the technical problems, the utility model adopts another technical scheme that: an electronic device is provided, and the electronic device comprises the power supply protection circuit provided by the technical scheme.
The embodiment of the utility model has the beneficial effects that: compared with the prior art, the power supply protection circuit provided by the utility model has the advantages that the choke coil is arranged in the inhibition module to limit part of surge current energy, so that the inhibition module can absorb the residual surge energy in time, further, the surge amplitude is further inhibited and reduced, and the voltage stabilizing tube is arranged in the switching unit, so that the control end and the access end of the switching tube can be prevented from being damaged when the voltage is high, and the control end and the access end can be ensured to have enough voltage when the voltage is low so that the switching tube is fully conducted and kept in a low-resistance state.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic structural diagram of a first embodiment of a power supply protection circuit provided by the present utility model;
fig. 2 is a schematic structural diagram of a second embodiment of the power supply protection circuit provided by the present utility model;
FIG. 3 is a schematic diagram of a third embodiment of a power protection circuit according to the present utility model;
fig. 4 is a schematic structural diagram of a fourth embodiment of the power supply protection circuit provided by the present utility model;
fig. 5 is a schematic structural diagram of an embodiment of an electronic device provided by the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to 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. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a power supply protection circuit according to the present utility model. The power supply protection circuit 100 includes: a suppression module 10, a regulation module 20 and an output module 30.
The suppression module 10 includes a surge diode (not shown) and a plurality of capacitors (not shown). The surge diode is connected in parallel with a plurality of capacitors, and the cathode of the surge diode is used as an input end of the suppression module 10 for receiving the electric signal. The positive electrode of the surge diode and the second ends of the capacitors are grounded. The surge diode and the capacitors can suppress surge current.
The regulation module 20 comprises an overvoltage regulation unit, an undervoltage regulation unit and a switching unit.
The overvoltage regulating unit, the undervoltage regulating unit and the switching unit are coupled to the output of the suppression module 10. The switching unit includes a switching tube. The input end of the undervoltage regulating unit is coupled with the output end of the overvoltage regulating unit, and the control end of the switching unit is coupled with the output end of the undervoltage regulating unit.
When the voltage is insufficient, the corresponding transistors are in the cut-off state, so that the switching tubes of the switching units are also in the cut-off state, and cannot supply power to the electric equipment, and low-voltage power supply to the electric equipment is prevented.
When the voltage of the overvoltage regulating unit and the undervoltage regulating unit is normal, the transistors in the overvoltage regulating unit are in a cut-off state, and the transistors in the undervoltage unit are in a conduction state, so that the low level is provided for the control end of the switching tube, and the switching tube is conducted.
When the voltage exceeds the normal voltage, the transistors in the overvoltage regulating unit are in an on state, so that the transistors in the undervoltage unit are in an off state, and therefore the switching tube of the switching unit is also in the off state, power cannot be supplied to electric equipment, and high-voltage power supply to the electric equipment is prevented.
The output module 30 is coupled to the second path terminal of the switching tube, and is used for supplying power to the electric equipment when the switching tube is turned on.
In the above embodiment, although a part of the surge current can be suppressed by the suppression module 10 by connecting the surge diode and the plurality of capacitors in parallel, when a higher adapter is used erroneously, the input voltage is higher, and at this time, the suppression cannot be performed reasonably, which easily causes abnormality of the power supply protection circuit. Based on this, the present utility model proposes any one of the following embodiments to solve any one of the above technical problems.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of a power supply protection circuit according to the present utility model. The power supply protection circuit 100 includes: a suppression module 10, a regulation module 20 and an output module 30.
The suppression module 10 includes a choke coil L1, a surge diode D1, and a plurality of capacitors.
The first end of the choke coil L1 is used as an input end of the suppression module 10 for receiving an electrical signal, the second end of the choke coil L1 is coupled to the negative electrode of the surge diode D1 and the first ends of the capacitors, the surge diode D1 and the capacitors are connected in parallel, and the positive electrode of the surge diode D1 and the second ends of the capacitors are grounded.
The regulation module 20 comprises an overvoltage regulation unit 21, an undervoltage regulation unit 22 and a switching unit 23.
The overvoltage regulating unit 21, the undervoltage regulating unit 22 and the switching unit 23 are coupled to the output of the suppression module 10. The switching unit 23 includes a voltage stabilizing tube D2 and a switching tube Q1, wherein an anode of the voltage stabilizing tube D2 is coupled to a control end of the switching tube Q1, and a cathode of the voltage stabilizing tube D2 is coupled to a first path end of the switching tube Q1. The input end of the under-voltage regulating unit 22 is coupled to the output end of the over-voltage regulating unit 21, and the control end of the switching unit 23 is coupled to the output end of the under-voltage regulating unit 22.
The output module 30 is coupled to the second path of the switching tube Q1, and is configured to supply power to the electric device when the switching tube Q1 is turned on.
When the voltage is insufficient, the corresponding transistors of the overvoltage regulating unit 21 and the undervoltage regulating unit 22 are in the off state, so that the switching tube Q1 of the switching unit 23 is also in the off state, and cannot supply power to the electric equipment, thereby preventing low-voltage power supply to the electric equipment.
When the voltage is normal, the transistors in the overvoltage regulating unit 21 and the undervoltage regulating unit 22 are in an off state, and the transistors in the undervoltage unit are in an on state, so that the switching tube Q1 is turned on from providing a low level to the control end of the switching tube Q1.
When the voltage exceeds the normal voltage, the transistors in the overvoltage regulating unit 21 and the undervoltage regulating unit 22 are in an on state, so that the transistors in the undervoltage unit are in an off state, and therefore the switching tube Q1 of the switching unit 23 is also in an off state, power cannot be supplied to electric equipment, and high-voltage power supply to the electric equipment is prevented.
In this embodiment, the choke coil L1 is provided in the suppression module 10 to limit a part of surge current energy, so that the suppression module 10 can absorb residual surge energy in time, and further the surge amplitude is further suppressed and reduced, and further, the switching unit 23 is provided with the voltage stabilizing tube D2, so that the voltage stabilizing tube D2 can ensure that the control end and the path end of the switching tube Q1 are prevented from being damaged when the voltage is high, and can ensure that the control end and the path end have enough voltage to fully conduct the switching tube Q1 and maintain a low-resistance state when the voltage is low.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a third embodiment of a power supply protection circuit according to the present utility model. The power supply protection circuit 100 includes: a suppression module 10, a regulation module 20 and an output module 30.
The suppression module 10 includes a choke coil L1, a surge diode D1, and a plurality of capacitors.
The regulation module 20 comprises an overvoltage regulation unit 21, an undervoltage regulation unit 22 and a switching unit 23.
Wherein the overpressure regulating unit 21 comprises: a first diode D3 and a first transistor Q2.
Wherein, the cathode of the first diode D3 is coupled to the output end of the suppression module 10; the control terminal of the first transistor Q2 is coupled to the anode of the first diode D3, the first path terminal of the first transistor Q2 is coupled to the under-voltage regulator 22, and the second path terminal of the first transistor Q2 is grounded.
The under-voltage adjusting unit 22 includes: a fourth resistor R4, a fifth resistor R5, and a second transistor Q3.
The first end of the fourth resistor R4 is coupled to the output end of the suppression module 10, and the second end of the fourth resistor R4 is coupled to the first pass end of the first transistor Q2. The first end of the fifth resistor R5 is coupled to the second end of the fourth resistor R4, and the second end of the fifth resistor R5 is grounded. The control terminal of the second transistor Q3 is coupled to the second terminal of the fourth resistor R4, the first path terminal of the second transistor Q3 is coupled to the switching unit 23, and the second path terminal of the second transistor Q3 is grounded.
The switching unit 23 includes a regulator D2, a switching tube Q1, a seventh resistor R7, an eighth resistor R8, and a first capacitor C1.
The first end of the seventh resistor R7 is coupled to the output end of the suppression module 10.
The first end of the eighth resistor R8 is coupled to the second end of the seventh resistor R7 and the first path end of the second transistor Q3, and the second end of the eighth resistor R8 is coupled to the control end of the switching transistor Q1.
The first capacitor C1 is connected in parallel with the regulator tube D2.
The output module 30 is coupled to the second path terminal of the switching tube Q1, and is configured to supply power to the electric device when the switching tube Q1 is turned on.
Further, the overpressure adjustment unit 21 further includes: a first resistor R1, a second resistor R2 and a third resistor R3.
The first end of the first resistor R1 is coupled to the output end of the suppression module 10, and the second end of the first resistor R1 is coupled to the cathode of the first diode D3. The first end of the second resistor R2 is coupled to the anode of the first diode D3, and the second end of the second resistor R2 is coupled to the control end of the first transistor Q2. The first end of the third resistor R3 is coupled to the anode of the first diode D3, and the second end of the third resistor R3 is grounded.
Wherein the under-voltage adjusting unit 22 includes: a fourth resistor R4, a fifth resistor R5, and a second transistor Q3.
The first end of the fourth resistor R4 is coupled to the output end of the suppression module 10, and the second end of the fourth resistor R4 is coupled to the first pass end of the first transistor Q2.
The first end of the fifth resistor R5 is coupled to the second end of the fourth resistor R4, and the second end of the fifth resistor R5 is grounded.
The control terminal of the second transistor Q3 is coupled to the second terminal of the fourth resistor R4, the first path terminal of the second transistor Q3 is coupled to the switching unit 23, and the second path terminal of the second transistor Q3 is grounded.
Wherein the under-voltage adjustment unit 22 further comprises: the first end of the sixth resistor R6 is coupled to the second end of the fourth resistor R4, and the second end of the sixth resistor R6 is coupled to the control end of the second transistor Q3.
The output module 30 includes a plurality of capacitors connected in parallel, a first end of the capacitors connected in parallel is used as an output end of the output module 30, and a second end of the capacitors connected in parallel is grounded.
The surge diode D1 is matched with a 24V voltage signal, so that a larger input electric signal can be matched.
In an application scenario, when the voltage is insufficient, the first diode D3 is not sufficiently turned on, so that the base of the first transistor Q2 is at a low level, is not turned on, and is in an off state; meanwhile, due to insufficient voltage, the voltage divided by the base electrode of the second transistor Q3 is insufficient to turn on the second transistor Q3, and is also in an off state. Therefore, the first transistor Q2 and the second transistor Q3 are both in the off state, so that the switching transistor Q1 of the switching unit 23 is also in the off state, and cannot supply power to the electric equipment, so as to prevent low-voltage power supply to the electric equipment.
When the voltage is normal, the first diode D3 is not turned on sufficiently, and therefore the base of the first transistor Q2 is low, non-conductive, and turned off. At this time, the voltage divided by the base of the second transistor Q3 may make the second transistor Q3 turned on, because the second transistor Q3 is turned on, the control terminal of the switching transistor Q1 is pulled down to a low level, so that the switching transistor Q1 is turned on, and thus normal power is supplied to the electric device.
When the voltage exceeds the normal voltage, the first diode D3 is turned on reversely, the voltage of the base electrode of the first transistor Q2 is sufficient to turn on the first transistor Q2, and then the base electrode of the second transistor Q3 in the under-voltage unit is pulled down to a low level and is in an off state, so that the switching tube Q1 of the switching unit 23 is also in an off state, and power cannot be supplied to the electric equipment, so that high-voltage power supply to the electric equipment is prevented.
In this embodiment, the choke coil L1 is provided in the suppression module 10 to limit a part of surge current energy, so that the suppression module 10 can absorb the residual surge energy in time, and further the surge amplitude is further suppressed and reduced, and the switching unit 23 is further provided with the voltage stabilizing tube D2, so that the voltage stabilizing tube D2 can ensure that the control end and the path end of the switching tube Q1 are prevented from being damaged when the voltage is high, and can ensure that the control end and the path end have enough voltage to fully conduct the switching tube Q1 and maintain the low-resistance state when the voltage is low.
In one application scenario, the power protection circuit 100 is compatible with a larger input voltage, such as the input voltage of a 24V adapter. The surge diode D1 needs to be adapted to a larger input voltage. The surge diode D1 needs to be changed to 24V model when corresponding to the input voltage of the 24V adapter. But the clamping voltage for the surge is higher than before, which is more disadvantageous than the switching tube Q1, such as: the surge value of the original 12V voltage is 33V, 20V is obtained after the suppression of the 12V suppression module 10, after 24V input is used instead, the surge voltage can reach 50V, and 31V still exists after the suppression of the 24V suppression module 10; therefore, a choke coil L1 is added to the forefront end to limit a part of surge current energy, so that the suppression module 10 can absorb the residual surge energy in time, and the surge amplitude is further suppressed and reduced. The guaranteed amplitude can be controlled within 30V, and a certain margin is left, such as 27V: in order to prevent overvoltage damage between the grid electrode and the source electrode of the switching tube Q1, a 15V voltage stabilizing tube is connected between the two poles in a bridging mode, compared with a resistance voltage division mode, the high-voltage switching tube Q1 can ensure that the grid electrode and the source electrode of the switching tube Q1 are prevented from being damaged when in high voltage, and the grid electrode and the source electrode of the switching tube Q1 can ensure that enough voltages exist to enable the switching tube Q1 to be completely conducted and keep a low-resistance state when in low voltage.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a fourth embodiment of a power supply protection circuit according to the present utility model. The power supply protection circuit 100 includes: the capacitor comprises a choke coil L1, a surge diode D1, a capacitor C2, a capacitor C3, a capacitor C4, a first diode D3, a first transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second transistor Q3, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a voltage regulator D2, a switching tube Q1, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a grounding capacitor C11 and a grounding resistor R10.
In an application scenario, when the voltage is insufficient, the first diode D3 is not sufficiently turned on, so that the base of the first transistor Q2 is at a low level, is not turned on, and is in an off state; meanwhile, due to insufficient voltage, the voltage divided by the base electrode of the second transistor Q3 is insufficient to turn on the second transistor Q3, and is also in an off state. Therefore, the first transistor Q2 and the second transistor Q3 are both in the off state, so that the switch transistor Q1 is also in the off state, and cannot supply power to the electric equipment, thereby preventing low-voltage power supply to the electric equipment.
When the voltage is normal, the first diode D3 is not turned on sufficiently, and therefore the base of the first transistor Q2 is low, non-conductive, and turned off. At this time, the voltage divided by the base of the second transistor Q3 may make the second transistor Q3 turned on, because the second transistor Q3 is turned on, the control terminal of the switching transistor Q1 is pulled down to a low level, so that the switching transistor Q1 is turned on, and thus normal power is supplied to the electric device.
When the voltage exceeds the normal voltage, the first diode D3 is reversely conducted, the voltage of the base electrode of the first transistor Q2 is enough to enable the first transistor Q2 to be conducted, and then the base electrode of the second transistor Q3 in the undervoltage unit is pulled down to a low level to be in a cut-off state, so that the switching tube Q1 is also in the cut-off state, power cannot be supplied to electric equipment, and high-voltage power supply to the electric equipment is prevented.
In some embodiments, the threshold of the over-voltage and the under-voltage may be adjusted by setting specific resistance values of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8, and the breakdown voltage of the first diode D3, so as to adjust the voltage range passed by the circuit.
In this embodiment, by setting the choke coil L1 to limit a part of surge current energy, the remaining electronic components can absorb the residual surge energy in time, so that the surge amplitude is further suppressed and reduced, and further, the voltage regulator D2 can ensure that the control end and the path end of the switching tube Q1 are not damaged when in high voltage, and can ensure that sufficient voltages exist at the control end and the path end when in low voltage, so that the switching tube Q1 is completely conducted and kept in a low-resistance state, by adopting the above manner, the power supply protection circuit 100 can use 9V, 12V, 15V, 19V or 24V and other adapters as input of electrical signals, and is not limited to be within 12V any more, the use field of the power supply protection circuit 100 is increased, and the abnormality of the power supply protection circuit 100 due to voltage mismatch is reduced.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of an electronic device according to the present utility model. The electronic device 200 comprises a power supply protection circuit 100 as provided in any of the embodiments described above.
In summary, the power supply protection circuit 100 of the electronic device 200 limits a part of surge current energy by setting the choke coil L1 in the suppression module 10, so that the suppression module 10 can absorb the residual surge energy in time, further the surge amplitude is further suppressed and reduced, further, the switching unit 23 is provided with the voltage stabilizing tube D2, so that the voltage stabilizing tube D2 can ensure that the control end and the path end of the switching tube Q1 are prevented from being damaged when the voltage is high, and can ensure that the control end and the path end have enough voltage to fully conduct the switching tube Q1 and keep the low-resistance state when the voltage is low.
The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes according to the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.
Claims (10)
1. A power supply protection circuit, characterized in that the power supply protection circuit comprises:
the suppression module comprises a choke coil, a surge diode and a plurality of capacitors; the first end of the choke coil is used as an input end of the suppression module and is used for receiving an electric signal, the second end of the choke coil is coupled with the negative electrode of the surge diode and the first ends of the capacitors, the surge diode and the capacitors are connected in parallel, and the positive electrode of the surge diode and the second ends of the capacitors are grounded;
the adjusting module comprises an overvoltage adjusting unit, an undervoltage adjusting unit and a switch unit; the overvoltage regulating unit, the undervoltage regulating unit and the switching unit are coupled with the output end of the suppression module, the switching unit comprises a voltage stabilizing tube and a switching tube, the positive electrode of the voltage stabilizing tube is coupled with the control end of the switching tube, and the negative electrode of the voltage stabilizing tube is coupled with the first channel end of the switching tube;
and the output module is coupled with the second path end of the switching tube and is used for supplying power to electric equipment when the switching tube is conducted.
2. The power supply protection circuit of claim 1, wherein the overvoltage regulating unit comprises:
the negative electrode of the first diode is coupled with the output end of the suppression module;
the control end of the first transistor is coupled with the positive electrode of the first diode, the first channel end of the first transistor is coupled with the undervoltage regulating unit, and the second channel end of the first transistor is grounded.
3. The power supply protection circuit of claim 2, wherein the overvoltage regulating unit further comprises:
the first end of the first resistor is coupled with the output end of the suppression module, and the second end of the first resistor is coupled with the negative electrode of the first diode;
a second resistor, wherein a first end of the second resistor is coupled with the anode of the first diode, and a second end of the second resistor is coupled with the control end of the first transistor;
and the first end of the third resistor is coupled with the anode of the first diode, and the second end of the third resistor is grounded.
4. The power supply protection circuit of claim 2, wherein the under-voltage regulation unit comprises:
a fourth resistor, a first end of which is coupled to the output end of the suppression module, and a second end of which is coupled to the first pass end of the first transistor;
a fifth resistor, a first end of which is coupled to a second end of the fourth resistor, a second end of which is grounded;
and the control end of the second transistor is coupled with the second end of the fourth resistor, the first path end of the second transistor is coupled with the switch unit, and the second path end of the second transistor is grounded.
5. The power supply protection circuit of claim 4, wherein the under-voltage regulation unit further comprises:
and a sixth resistor, wherein a first end of the sixth resistor is coupled to a second end of the fourth resistor, and a second end of the sixth resistor is coupled to the control end of the second transistor.
6. The power supply protection circuit of claim 4, wherein the switching unit further comprises:
a seventh resistor, wherein a first end of the seventh resistor is coupled to the output end of the suppression module;
an eighth resistor, wherein a first end of the eighth resistor is coupled to a second end of the seventh resistor and a first path end of the second transistor, and a second end of the eighth resistor is coupled to a control end of the switching tube;
and the first capacitor is connected with the voltage stabilizing tube in parallel.
7. The power supply protection circuit of claim 1, wherein the output module comprises a plurality of capacitors connected in parallel, a first end of the capacitors connected in parallel being an output of the output module, a second end of the capacitors connected in parallel being grounded.
8. The power supply protection circuit of claim 1, wherein the surge diode is adapted to a 24V voltage signal.
9. The power protection circuit of claim 1, wherein the suppression module further comprises:
a grounded capacitor, a first end of which is coupled to a second end of the choke coil, and a second end of which is grounded;
and the first end of the grounding resistor is coupled with the first end of the grounding capacitor, and the second end of the grounding resistor is grounded.
10. An electronic device comprising the power supply protection circuit of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320175665.0U CN219740197U (en) | 2023-01-13 | 2023-01-13 | Power supply protection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320175665.0U CN219740197U (en) | 2023-01-13 | 2023-01-13 | Power supply protection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219740197U true CN219740197U (en) | 2023-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320175665.0U Active CN219740197U (en) | 2023-01-13 | 2023-01-13 | Power supply protection circuit and electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN219740197U (en) |
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2023
- 2023-01-13 CN CN202320175665.0U patent/CN219740197U/en active Active
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