CN113541121B - Hot plug protection circuit, plug device and electronic equipment - Google Patents
Hot plug protection circuit, plug device and electronic equipment Download PDFInfo
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- CN113541121B CN113541121B CN202110793643.6A CN202110793643A CN113541121B CN 113541121 B CN113541121 B CN 113541121B CN 202110793643 A CN202110793643 A CN 202110793643A CN 113541121 B CN113541121 B CN 113541121B
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- 238000001514 detection method Methods 0.000 claims description 10
- 230000005669 field effect Effects 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 238000010616 electrical installation Methods 0.000 claims 3
- 239000003990 capacitor Substances 0.000 description 9
- 230000003111 delayed effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
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Abstract
The invention discloses a hot plug protection circuit, a plug device and electronic equipment, wherein the hot plug protection circuit comprises a first switch device; the hot plug protection circuit further comprises a second switching device, a second connecting circuit and a third connecting circuit are arranged on the input end of the second switching device, the second connecting circuit is connected with the power input end, and the third connecting circuit is connected with the controlled end of the first switching device. The second switching device can be used for receiving a control level for enabling the second switching device to be turned off, so that a power supply can directly provide a high level for the first switching device to be turned on, and the possibility that the control chip is burnt due to electrostatic discharge of the power utilization device during hot plug is reduced; the second switching device can also be used for receiving a control level for enabling the second switching device to be conducted, so that the first switching device is cut off, a pluggable power utilization device is powered off before being pulled out, and the hot plug protection circuit reduces the possibility of damage of the power utilization device during pulling out.
Description
Technical Field
The present invention relates to the field of conductive connection, and in particular, to a hot plug protection circuit, a plug device, and an electronic device.
Background
Nowadays, plug-in OPS computers (OPS, open Pluggable Specification, open pluggable specification) are widely applied to electronic devices such as conference integrated machines, electronic whiteboards, education integrated machines and the like. The phenomenon of plugging the OPS computer often occurs in the production and use processes, and the plugging of the power utilization devices such as the OPS computer in the production and use processes is commonly called hot plugging, namely hot plugging, and refers to plugging or unplugging the power utilization devices such as the OPS computer, the module, the board card and the like into or from a system under the condition that a system power supply is not closed. The control chip is often burned during the production or the use of hot plug, and the control chip, the main control board chip and other parts of the power utilization device such as the OPS computer are easily burned.
Disclosure of Invention
The invention mainly aims to provide a hot plug protection circuit, which aims to reduce the risk of damage of an electric device during hot plug.
In order to achieve the above purpose, the hot plug protection circuit provided by the invention comprises a power input end and a power output end, wherein the power output end is used for connecting a pluggable power utilization device; a first connecting circuit is arranged between the power input end and the power output end, and a first switching device is arranged on the first connecting circuit; the hot plug protection circuit further comprises a second switching device, the output end of the second switching device is used for being grounded, a second connecting circuit and a third connecting circuit are arranged on the input end of the second switching device, the second connecting circuit is connected with the power input end, and the third connecting circuit is connected with the controlled end of the first switching device; the controlled end of the second switching device is used for connecting a control level.
Optionally, the hot plug protection circuit further includes a level reversing circuit, where the level reversing circuit includes a level input end and a level output end, the level input end is used to connect with a control level, the level output end is connected with the controlled end of the second switching device, and the level reversing circuit is used to output an output level opposite to the access level of the level input end. The level direction circuit enables the control level to be reversed after the level input end is connected, so that the hot plug protection circuit further reduces the risk of damage of the power utilization device during hot plug.
Optionally, the level reversing circuit includes a third switching device, a fourth connection circuit and a fifth connection circuit are arranged on an input end of the third switching device, the fourth connection circuit is connected with a controlled end of the second switching device, the level output end is arranged on the fourth connection circuit, and the fifth connection circuit is used for connecting a power supply; the output end of the third switching device is used for being grounded, and the level input end comprises a controlled end of the third switching device. The third switching device can provide switching control information by utilizing the access level of the level input end, and the power supply accessed by the fifth connecting circuit provides a new control level, so that the risk of damaging the connecting equipment on the level input end when the electric device is hot plugged is reduced, and the equipment friendliness of the hot plug protection circuit is improved.
Optionally, the first switching device is configured as a field effect transistor, and/or the second switching device is configured as a triode, and/or the third switching device is configured as a triode.
Optionally, a sixth connection circuit is arranged on the controlled end of the third switching device, and the sixth connection circuit is used for connecting a switching-on/off signal. The sixth connecting circuit can be connected with a switching signal, and the switching signal is used for controlling the on/off of the first switching device, so that the compatibility of the hot plug protection circuit is improved.
Optionally, a seventh connection circuit is arranged at the controlled end of the third switching device, and the seventh connection circuit is used for connecting the plug signal of the power utilization device. The seventh connection circuit can be connected with the plug signal of the electric device, and the first switching device is controlled to be turned on or off by the plug signal of the electric device, so that the hot plug protection circuit can respond to the plug signal of the electric device more flexibly.
The invention also provides a plug-in device for connecting the pluggable electric device, which comprises the hot plug protection circuit.
The invention also provides a plug-in device which is used for connecting a pluggable power utilization device and comprises the hot plug protection circuit; the control circuit comprises a first output end, the first output end is connected with the sixth connecting circuit, the first output end is used for outputting a switching-on/off signal, and the switching-on/off signal comprises a high-level starting-up signal and a low-level shutdown signal.
The invention also provides a plug-in device which is used for connecting a pluggable power utilization device and comprises the hot plug protection circuit; the control circuit comprises a first output end and a second output end, wherein the first output end is connected with the sixth connecting circuit and is used for outputting a switching-on/off signal, and the switching-on/off signal comprises a high-level starting-up signal and a low-level shutdown signal; the second output end is connected with the seventh connecting circuit and is used for outputting a plug signal of the power utilization device, and the plug signal of the power utilization device comprises a high level and a low level.
Optionally, the control circuit includes a detection circuit, where the detection circuit is configured to detect an insertion state of the electric device, and output a low level to the second output terminal when detecting that the electric device is inserted, and output a high level to the second output terminal when detecting that the electric device is pulled out.
Optionally, the control circuit further includes a delay circuit, where the delay circuit is configured to delay the power-on signal by a preset time and output the delayed power-on signal to the second output end when the power-on device is detected to be plugged in. The power-on signal is delayed for a preset time and then is output to the second output end, and the power supply can be turned on after the preset time of the insertion action by using the electric device, so that the possibility of transient voltage impact and static electricity release is reduced, and the risk of damage of the electric device during hot plug is reduced.
The invention also provides electronic equipment, which comprises the plug-in device and a pluggable power utilization device.
Optionally, the electronic device comprises any one of a conference integrated machine, an electronic whiteboard and an education integrated machine, and the electricity utilization device comprises an OPS computer.
According to the technical scheme, the first switching device is arranged on the first connecting line between the power input end and the power output end, and the second switching device connected with the first switching device is arranged, so that the second switching device can be used for receiving a control level for enabling the second switching device to be cut off, the power supply can directly provide a high level for the first switching device to be conducted through the power input end, the second connecting circuit and the third connecting circuit, and the possibility that the power consumption device generates static electricity during hot plug to cause burning of a control chip is reduced; the second switching device can also be used for receiving a control level for enabling the second switching device to be conducted, so that the first switching device is cut off, a pluggable power utilization device is powered off before being pulled out, and the hot plug protection circuit reduces the possibility of damage of the power utilization device during pulling out.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram illustrating a hot plug protection circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a hot plug protection circuit according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a hot plug protection circuit according to another embodiment of the present invention.
Fig. 4 is a schematic structural view of an embodiment of the plugging device of the present invention.
Fig. 5 is a schematic view of another embodiment of the plugging device according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 11 | Control circuit | 111 | A first output end |
| 112 | A second output end | 113 | Detection circuit |
| 114 | Delay circuit | 211 | First connecting circuit |
| 2111 | Power supply input terminal | 2112 | Power supply output terminal |
| 221 | Second connection circuit | 222 | Third connection circuit |
| 231 | Fourth connection circuit | 2311 | Level output terminal |
| 232 | Fifth connection circuit | 233 | Level input terminal |
| 2331 | Sixth connection circuit | 2332 | Seventh connection circuit |
| 24 | Level reversing circuit |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present invention, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a hot plug protection circuit.
Referring to fig. 1, in an embodiment of the hot plug protection circuit of the present invention, the hot plug protection circuit includes a power input terminal 2111 and a power output terminal 2112, wherein the power output terminal 2112 is used for connecting a pluggable electric device, such as an OPS computer; a first connection circuit 211 is arranged between the power input end 2111 and the power output end 2112, and a first switching device Q1 is arranged on the first connection circuit 211, specifically, the first switching device Q1 is a field effect transistor; the hot plug protection circuit further includes a second switching device Q2, in this embodiment, the second switching device Q2 is configured as a triode, an output terminal of the second switching device Q2 is used for grounding, and a second connection circuit 221 and a third connection circuit 222 are disposed on an input terminal of the second switching device Q2, that is, the second connection circuit 221 and the third connection circuit 222 form a common contact point on the input terminal of the second switching device Q2 to communicate. The second connection circuit 221 is provided with a voltage dividing resistor R1, and the third connection circuit 222 is provided with a voltage dividing resistor R2. The hot plug protection circuit can also be provided with a capacitor C1, two ends of the capacitor C1 are respectively connected to the second connection circuit 221 and the third connection circuit 222, the capacitor C1 provides electrostatic buffering for the second connection circuit 221 and the third connection circuit 222, and the possibility of damage of the hot plug protection circuit is reduced. The second connection circuit 221 is connected to the power supply input terminal 2111, and the third connection circuit 222 is connected to the controlled terminal of the first switching device Q1; the controlled terminal of the second switching device Q2 is used to connect the control level. By providing the first switching device Q1 on the first connection line 211 between the power input terminal 2111 and the power output terminal 2112 and providing the second switching device Q2 connected to the first switching device Q1, the second switching device Q2 can be used to receive a control level for turning itself off, IN this embodiment, a low level, so that the power source +dc_in can directly provide a high level for turning on the first switching device Q1 through the power input terminal 2111, the second connection circuit 221 and the third connection circuit 222, thereby reducing the possibility of the power consumption device being subjected to electrostatic discharge during hot plug to cause burning of the control chip; the second switching device Q2 can also be used to receive a control level that turns itself on, IN this embodiment, a high level, so that the first switching device Q1 is turned off, and the pluggable power consumer turns off the power supply +dc_in before being unplugged, i.e., the power supply input +vin of the power consumer is zero, so that the hot plug protection circuit reduces the possibility of damage to the power consumer during unplugging.
Further alternatively, the hot plug protection circuit further includes a level reversing circuit 24, where the level reversing circuit 24 includes a level input 233 and a level output 2311, the level input 233 is used for connecting a control level, the level output 2311 is connected to a controlled terminal of the second switching device Q2, and the level reversing circuit 24 is used for outputting an output level opposite to an access level of the level input 233. The level reversing circuit 24 includes a third switching device Q3, and the third switching device Q3 is provided as a transistor in the present embodiment. The input end of the third switching device Q3 is provided with a fourth connection circuit 231 and a fifth connection circuit 232, the fifth connection circuit 232 is provided with a voltage dividing resistor R4, the fourth connection circuit 231 is connected with the controlled end of the second switching device Q2, the level output end 2311 is arranged on the fourth connection circuit 231, and the fifth connection circuit 232 is used for connecting a power supply, and the power supply is set to be a +5v power supply in the embodiment; the output end of the third switching device Q3 is used for grounding, the level input end 233 includes a controlled end of the third switching device Q3, a sixth connection circuit 2331 is disposed on the controlled end of the third switching device Q3, a voltage dividing resistor R3 is disposed on the sixth connection circuit 2331, and the sixth connection circuit 2331 is used for connecting a switching signal, where the switching signal can be sent by an associated control motherboard, such as an android motherboard of the education all-in-one machine. The level direction circuit 24 enables the control level to go through the reverse direction after the level input 233 is connected, and further enables the hot plug protection circuit to reduce the risk of damaging the power device during hot plug. The third switching device Q3 can provide switching control information by using the access level of the level input terminal 233, and the +5v power accessed through the fifth connection circuit 232 provides a new control level, so that the risk of damaging the connection device on the level input terminal 233 when the power utilization device performs hot plug is reduced, and the device friendliness of the hot plug protection circuit is improved. The sixth connection circuit 2331 can access a switching signal, and control the on or off of the first switching device Q1 through the switching signal, thereby improving the compatibility of the hot plug protection circuit.
Referring to fig. 2, in another embodiment of the present invention, the hot plug protection circuit includes a power input terminal 2111 and a power output terminal 2112, wherein the power output terminal 2112 is used for connecting a pluggable power consumption device, such as an OPS computer; a first connection circuit 211 is arranged between the power input end 2111 and the power output end 2112, and a first switching device Q1 is arranged on the first connection circuit 211, specifically, the first switching device Q1 is a field effect transistor; the hot plug protection circuit further includes a second switching device Q2, in this embodiment, the second switching device Q2 is configured as a triode, an output terminal of the second switching device Q2 is used for grounding, and a second connection circuit 221 and a third connection circuit 222 are disposed on an input terminal of the second switching device Q2, that is, the second connection circuit 221 and the third connection circuit 222 form a common contact point on the input terminal of the second switching device Q2 to communicate. The second connection circuit 221 is provided with a voltage dividing resistor R1, and the third connection circuit 222 is provided with a voltage dividing resistor R2. The hot plug protection circuit can also be provided with a capacitor C1, two ends of the capacitor C1 are respectively connected to the second connection circuit 221 and the third connection circuit 222, the capacitor C1 provides electrostatic buffering for the second connection circuit 221 and the third connection circuit 222, and the possibility of damage of the hot plug protection circuit is reduced. The second connection circuit 221 is connected to the power supply input terminal 2111, and the third connection circuit 222 is connected to the controlled terminal of the first switching device Q1; the controlled terminal of the second switching device Q2 is used to connect the control level. By providing the first switching device Q1 on the first connection line 211 between the power input terminal 2111 and the power output terminal 2112 and providing the second switching device Q2 connected to the first switching device Q1, the second switching device Q2 can be used to receive a control level for turning itself off, IN this embodiment, a low level, so that the power source +dc_in can directly provide a high level for turning on the first switching device Q1 through the power input terminal 2111, the second connection circuit 221 and the third connection circuit 222, thereby reducing the possibility of the power consumption device being subjected to electrostatic discharge during hot plug to cause burning of the control chip; the second switching device Q2 can also be used to receive a control level that turns itself on, IN this embodiment, a high level, so that the first switching device Q1 is turned off, and the pluggable power consumer turns off the power supply +dc_in before being unplugged, i.e., the power supply input +vin of the power consumer is zero, so that the hot plug protection circuit reduces the possibility of damage to the power consumer during unplugging.
The hot plug protection circuit further includes a level reversing circuit 24, where the level reversing circuit 24 includes a level input terminal 233 and a level output terminal 2311, the level input terminal 233 is used for connecting a control level, the level output terminal 2311 is connected to the controlled terminal of the second switching device Q2, and the level reversing circuit 24 is used for outputting an output level opposite to the access level of the level input terminal 233. The level reversing circuit 24 includes a third switching device Q3, and the third switching device Q3 is provided as a transistor in the present embodiment. The input end of the third switching device Q3 is provided with a fourth connection circuit 231 and a fifth connection circuit 232, the fifth connection circuit 232 is provided with a voltage dividing resistor R4, the fourth connection circuit 231 is connected with the controlled end of the second switching device Q2, the level output end 2311 is arranged on the fourth connection circuit 231, and the fifth connection circuit 232 is used for connecting a power supply, and the power supply is set to be a +5v power supply in the embodiment; the output end of the third switching device Q3 is used for grounding, the level input end 233 includes a controlled end of the third switching device Q3, a seventh connection circuit 2332 is disposed on the controlled end of the third switching device, a voltage dividing resistor R5 is disposed on the seventh connection circuit 2332, and the seventh connection circuit 2332 is used for connecting a plug signal of the power utilization device. The plugging signal of the power utilization device can be sent out by a relevant control main board, such as an android main board of the education all-in-one machine. Specifically, when the control board detects that the power device is plugged into or plugged out of the power device, the control board sends a plug signal of the power device to the seventh connection circuit 2332. The level direction circuit 24 enables the control level to go through the reverse direction after the level input 233 is connected, and further enables the hot plug protection circuit to reduce the risk of damaging the power device during hot plug. The third switching device Q3 can provide switching control information by using the access level of the level input terminal 233, and the +5v power accessed through the fifth connection circuit 232 provides a new control level, so that the risk of damaging the connection device on the level input terminal 233 when the power utilization device performs hot plug is reduced, and the device friendliness of the hot plug protection circuit is improved. The seventh connection circuit 2332 is capable of receiving a plug signal of the electric device, and controlling the on or off of the first switching device Q1 by the plug signal of the electric device, so that the hot plug protection circuit can more flexibly respond to the plug signal of the electric device.
Referring to fig. 3, in yet another embodiment of the present invention, the hot plug protection circuit includes a power input 2111 and a power output 2112, wherein the power output 2112 is used for connecting to a pluggable power consumption device, such as an OPS computer; a first connection circuit 211 is arranged between the power input end 2111 and the power output end 2112, and a first switching device Q1 is arranged on the first connection circuit 211, specifically, the first switching device Q1 is a field effect transistor; the hot plug protection circuit further includes a second switching device Q2, in this embodiment, the second switching device Q2 is configured as a triode, an output terminal of the second switching device Q2 is used for grounding, and a second connection circuit 221 and a third connection circuit 222 are disposed on an input terminal of the second switching device Q2, that is, the second connection circuit 221 and the third connection circuit 222 form a common contact point on the input terminal of the second switching device Q2 to communicate. The second connection circuit 221 is provided with a voltage dividing resistor R1, and the third connection circuit 222 is provided with a voltage dividing resistor R2. The hot plug protection circuit can also be provided with a capacitor C1, two ends of the capacitor C1 are respectively connected to the second connection circuit 221 and the third connection circuit 222, the capacitor C1 provides electrostatic buffering for the second connection circuit 221 and the third connection circuit 222, and the possibility of damage of the hot plug protection circuit is reduced. The second connection circuit 221 is connected to the power supply input terminal 2111, and the third connection circuit 222 is connected to the controlled terminal of the first switching device Q1; the controlled terminal of the second switching device Q2 is used to connect the control level. By providing the first switching device Q1 on the first connection line 211 between the power input terminal 2111 and the power output terminal 2112 and providing the second switching device Q2 connected to the first switching device Q1, the second switching device Q2 can be used to receive a control level for turning itself off, IN this embodiment, a low level, so that the power source +dc_in can directly provide a high level for turning on the first switching device Q1 through the power input terminal 2111, the second connection circuit 221 and the third connection circuit 222, thereby reducing the possibility of the power consumption device being subjected to electrostatic discharge during hot plug to cause burning of the control chip; the second switching device Q2 can also be used to receive a control level that turns itself on, IN this embodiment, a high level, so that the first switching device Q1 is turned off, and the pluggable power consumer turns off the power supply +dc_in before being unplugged, i.e., the power supply input +vin of the power consumer is zero, so that the hot plug protection circuit reduces the possibility of damage to the power consumer during unplugging.
The hot plug protection circuit further includes a level reversing circuit 24, where the level reversing circuit 24 includes a level input terminal 233 and a level output terminal 2311, the level input terminal 233 is used for connecting a control level, the level output terminal 2311 is connected to the controlled terminal of the second switching device Q2, and the level reversing circuit 24 is used for outputting an output level opposite to the access level of the level input terminal 233. The level reversing circuit 24 includes a third switching device Q3, and the third switching device Q3 is provided as a transistor in the present embodiment. The input end of the third switching device Q3 is provided with a fourth connection circuit 231 and a fifth connection circuit 232, the fifth connection circuit 232 is provided with a voltage dividing resistor R4, the fourth connection circuit 231 is connected with the controlled end of the second switching device Q2, the level output end 2311 is arranged on the fourth connection circuit 231, and the fifth connection circuit 232 is used for connecting a power supply, and the power supply is set to be a +5v power supply in the embodiment; the output terminal of the third switching device Q3 is used for grounding, and the level input terminal 233 includes a controlled terminal of the third switching device Q3, and the controlled terminal of the third switching device Q3 is provided with a sixth connection circuit 2331 and a seventh connection circuit 2332. The sixth connection circuit 2331 is provided with a voltage dividing resistor R3, and the seventh connection circuit 2332 is provided with a voltage dividing resistor R5. The sixth connection circuit 2331 is configured to connect an on-off signal, which may be sent by an associated control motherboard, such as an android motherboard of the educational all-in-one machine. The seventh connection circuit 2332 is used for connecting the plug signal of the electric device. The plugging signal of the power utilization device can be sent out by a relevant control main board, such as an android main board of the education all-in-one machine. Specifically, when the control board detects that the power device is plugged into or plugged out of the power device, the control board sends a plug signal of the power device to the seventh connection circuit 2332. The level direction circuit 24 enables the control level to go through the reverse direction after the level input 233 is connected, and further enables the hot plug protection circuit to reduce the risk of damaging the power device during hot plug. The third switching device Q3 can provide switching control information by using the access level of the level input terminal 233, and the +5v power accessed through the fifth connection circuit 232 provides a new control level, so that the risk of damaging the connection device on the level input terminal 233 when the power utilization device performs hot plug is reduced, and the device friendliness of the hot plug protection circuit is improved. When the power supply device is used, the seventh connection circuit 2332 can be set to provide a continuous low level when the power supply device is inserted through the control main board, so that the first switching device Q1 is kept stably normally closed when a starting signal of the sixth connection circuit 2331 is not received, the voltage mutation of the first switching device Q1 is reduced, and the risk of damage to the power supply device is reduced.
The invention also provides a plug-in device for connecting the pluggable electric device, which comprises the hot plug protection circuit.
Specifically, as shown in fig. 4, in an embodiment of the plug device according to the present invention, the plug device is used for connecting a pluggable electric device, and the plug device further includes the hot plug protection circuit shown in fig. 1; the plugging device further comprises a control circuit 11, the control circuit 11 comprises a first output end 111, the first output end 111 is connected with a sixth connection circuit 2331, the first output end 111 is used for outputting a switching-on and switching-off signal, and the switching-on and switching-off signal comprises a high-level starting-up signal and a low-level switching-off signal.
As shown in fig. 5, in another embodiment of the plug device according to the present invention, the plug device is used for connecting a pluggable electric device, and the plug device further includes the hot plug protection circuit shown in fig. 3; the plugging device further comprises a control circuit 11, the control circuit 11 comprises a first output end 111 and a second output end 112, the first output end 111 is connected with a sixth connection circuit 2331, the first output end 111 is used for outputting a switching-on/off signal, and the switching-on/off signal comprises a high-level starting-up signal and a low-level shutting-off signal; the second output terminal 112 is connected to the seventh connection circuit 2332, and the second output terminal 112 is configured to output a plug signal of the electrical device, where the plug signal of the electrical device includes a high level and a low level. The control circuit 11 includes a detection circuit 113, the detection circuit 113 is configured to detect an insertion state of the electric device, the detection circuit 113 outputs a low level to the second output terminal 112 when detecting that the electric device is inserted, and the detection circuit 113 outputs a high level to the second output terminal 112 when detecting that the electric device is extracted. The control circuit 11 further includes a delay circuit 114, where the delay circuit 114 is configured to delay the power-on signal by a preset time and output the delayed power-on signal to the second output terminal 112 when the power-on device is detected to be plugged in. The power-on signal is delayed for a preset time and then is output to the second output end 112, so that the power supply can be turned on after the preset time of the insertion action by using the electric device, the possibility of transient voltage impact and static electricity release is reduced, and the risk of damage of the electric device during hot plug is reduced.
The plugging device adopts the technical scheme of the embodiment of the hot plug protection circuit, so that the plugging device at least has all the beneficial effects brought by the technical scheme of the embodiment and is not described in detail herein.
The invention also provides electronic equipment, which comprises the plug-in device and a pluggable power utilization device. The electronic equipment comprises any one of a conference integrated machine, an electronic whiteboard and an education integrated machine, and the power utilization device comprises an OPS computer.
The electronic equipment adopts all the technical schemes of all the embodiments of the plugging device, so that the electronic equipment at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated here.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (11)
1. The hot plug protection circuit is characterized by comprising a power input end and a power output end, wherein the power output end is used for being connected with a pluggable power utilization device; a first connecting circuit is arranged between the power input end and the power output end, and a first switching device is arranged on the first connecting circuit; the hot plug protection circuit further comprises a second switching device, the output end of the second switching device is used for being grounded, a second connecting circuit and a third connecting circuit are arranged on the input end of the second switching device, the second connecting circuit is connected with the power input end, and the third connecting circuit is connected with the controlled end of the first switching device; the controlled end of the second switching device is used for connecting a control level;
the hot plug protection circuit further comprises a level reversing circuit, the level reversing circuit comprises a level input end and a level output end, the level input end is used for being connected with a control level, the level output end is connected with a controlled end of the second switching device, and the level reversing circuit is used for outputting an output level opposite to an access level of the level input end;
the level reversing circuit comprises a third switching device, a fourth connecting circuit and a fifth connecting circuit are arranged at the input end of the third switching device, the fourth connecting circuit is connected with the controlled end of the second switching device, the level output end is arranged on the fourth connecting circuit, and the fifth connecting circuit is used for connecting a power supply; the output end of the third switching device is used for being grounded, and the level input end comprises a controlled end of the third switching device.
2. The hot plug protection circuit of claim 1, wherein the first switching device is configured as a field effect transistor and/or the second switching device is configured as a triode and/or the third switching device is configured as a triode.
3. The hot plug protection circuit of claim 1, wherein a sixth connection circuit is provided on the controlled side of the third switching device, the sixth connection circuit being configured to connect a power on/off signal.
4. The hot plug protection circuit of claim 3, wherein a seventh connection circuit is provided on the controlled side of the third switching device, the seventh connection circuit being configured to connect a plug signal of the power device.
5. A plug-in device for connecting a pluggable electrical installation, comprising a hot plug protection circuit according to any one of claims 1 to 2.
6. A plug-in device for connecting a pluggable electrical installation, comprising a hot plug protection circuit according to claim 3; the control circuit comprises a first output end, the first output end is connected with the sixth connecting circuit, the first output end is used for outputting a switching-on/off signal, and the switching-on/off signal comprises a high-level starting-up signal and a low-level shutdown signal.
7. A plug-in device for connecting a pluggable electrical installation, comprising a hot plug protection circuit according to claim 4; the control circuit comprises a first output end and a second output end, wherein the first output end is connected with the sixth connecting circuit and is used for outputting a switching-on/off signal, and the switching-on/off signal comprises a high-level starting-up signal and a low-level shutdown signal; the second output end is connected with the seventh connecting circuit and is used for outputting a plug signal of the power utilization device, and the plug signal of the power utilization device comprises a high level and a low level.
8. The plug-in device according to claim 7, wherein the control circuit includes a detection circuit for detecting an insertion state of the power-using device, the detection circuit outputting a low level to the second output terminal when detecting that the power-using device is inserted, the detection circuit outputting a high level to the second output terminal when detecting that the power-using device is pulled out.
9. The plug-in device of claim 7, wherein the control circuit further comprises a delay circuit for delaying the power-on signal by a preset time and outputting it to the second output terminal when the power-on device is detected to be plugged in.
10. An electronic device comprising a plug-in device according to any one of claims 5 to 9, and further comprising a pluggable electrical device.
11. The electronic device of claim 10, wherein the electronic device comprises any one of a conference kiosk, an electronic whiteboard, and an educational kiosk, and the power-consuming device comprises an OPS computer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793643.6A CN113541121B (en) | 2021-07-13 | 2021-07-13 | Hot plug protection circuit, plug device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793643.6A CN113541121B (en) | 2021-07-13 | 2021-07-13 | Hot plug protection circuit, plug device and electronic equipment |
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| CN113541121A CN113541121A (en) | 2021-10-22 |
| CN113541121B true CN113541121B (en) | 2023-12-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114389247A (en) * | 2022-01-17 | 2022-04-22 | 苏州联讯仪器有限公司 | Hot plug protection device, method, equipment and medium |
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| CN113541121A (en) | 2021-10-22 |
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