CN114552560B - Hot plug application circuit - Google Patents
Hot plug application circuit Download PDFInfo
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- CN114552560B CN114552560B CN202210116099.6A CN202210116099A CN114552560B CN 114552560 B CN114552560 B CN 114552560B CN 202210116099 A CN202210116099 A CN 202210116099A CN 114552560 B CN114552560 B CN 114552560B
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- 239000003990 capacitor Substances 0.000 claims abstract description 120
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 94
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000001052 transient effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/001—Hot plugging or unplugging of load or power modules to or from power distribution networks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The application discloses a hot plug application circuit which comprises a hot plug detection and power supply unit, a power supply switch tube, a switch circuit, a voltage stabilizing capacitor group and load equipment, wherein the power supply switch tube is connected with the hot plug detection and power supply unit; the second end of the voltage stabilizing capacitor group is not grounded when the power supply switching tube is conducted, so that the voltage stabilizing capacitor group cannot be charged in the conducting process of the power supply switching tube, namely, larger surge current cannot be generated to damage the power supply switching tube; the power supply switch tube is completely conducted after the preset delay time, the impedance is smaller, the bearable current is increased, at the moment, the second end of each capacitor of the voltage stabilizing capacitor group is grounded by the switch circuit, each capacitor in the voltage stabilizing capacitor group is charged respectively, and the charging current is not changed greatly when the capacitors are charged due to the fact that the second ends of the capacitors are grounded unevenly, so that the hot plug effect is guaranteed. According to the application, the delay of the voltage stabilizing capacitor group is controlled and the voltage stabilizing capacitor group is not charged simultaneously, so that the current and voltage variation is reduced, and the normal operation of the power supply switching tube is ensured.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to a hot plug application circuit.
Background
The hot plug technology is a key technology for realizing continuous operation and maintenance without shutdown of a server. In order to increase the scalability and flexibility of servers and to allow users to remove and replace damaged components or boards without powering down the system, more and more boards and devices need to support hot plug functionality. In the hot plug process, the hot plug function is to avoid the voltage and current of the server from generating obvious fluctuation.
In the prior art, a hot plug controller is generally adopted to realize a hot plug function, as shown in fig. 1, fig. 1 is a schematic circuit diagram of a design circuit of a hot plug device in the prior art, wherein when the hot plug device in fig. 1 is plugged into a server in operation, that is, when hot plug is performed, VIN in fig. 1 is connected with the server, in order to avoid voltage fluctuation inside the server caused by sudden increase of charging current of a load device, when the hot plug controller detects that the device in which the hot plug controller is located is plugged into the server in operation, the hot plug controller controls a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor) connected with the hot plug controller to be conducted, and controls gate voltage of the MOS transistor to realize control of charging current of the load device, but when the hot plug device is provided with a voltage stabilizing capacitor, a larger surge current is generated due to instant charging of the voltage stabilizing capacitor when the MOS transistor is conducted, and heat accumulated in a process of conducting the MOS transistor is higher when a safe working area of the MOS transistor is not suitable, so that the hot plug device cannot work normally.
Disclosure of Invention
The application aims to provide a hot plug application circuit which can reduce current and voltage changes and ensure normal operation of a power supply switching tube by controlling delay of a voltage stabilizing capacitor group and charging the voltage stabilizing capacitor group at different times.
In order to solve the technical problems, the application provides a hot plug application circuit which comprises a hot plug detection and power supply unit, a power supply switching tube, a switching circuit, a voltage stabilizing capacitor group and load equipment; the first end of the power supply switch tube is connected with the power supply end of the hot plug detection and power supply unit, the control end of the power supply switch tube is connected with the control end of the hot plug detection and power supply unit, and the second end of the power supply switch tube is connected with the first end of each voltage stabilizing capacitor in the voltage stabilizing capacitor group and the load equipment; the first end of the switching circuit is connected with the second end of the switching tube, and the second end of the switching tube is connected with the second end of the voltage stabilizing capacitor group;
the hot plug detection and power supply unit is used for controlling the power supply switching tube to be conducted when detecting that the hot plug detection and power supply unit is connected with a running server, so as to charge the voltage stabilizing capacitor group through the power supply switching tube and supply power for the load equipment;
the switching circuit is used for respectively controlling the second ends of the voltage stabilizing capacitors in the voltage stabilizing capacitor group to be grounded after the power supply switching tube is conducted and a preset delay time is passed, and the second ends of the voltage stabilizing capacitors are grounded in different time; the preset delay time is longer than the conduction time of the power supply switching tube.
Preferably, the hot plug detection and power supply unit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first switch tube, a second switch tube, a first direct current power supply and a second direct current power supply;
the output end of the first direct current power supply is connected with the first end of the third resistor, the first end of the fifth resistor, the first end of the seventh resistor and the first end of the power supply switching tube;
the first end of the first resistor is connected with the second direct current power supply, and the second end is grounded when the hot plug application circuit is connected with the running server;
the first end of the second resistor is connected with the second end of the first resistor, and the second end is grounded;
the control end of the first switch tube is connected with the second end of the first resistor, and the second end of the first switch tube is grounded and is used for being turned off when the second end of the first resistor is grounded;
the second end of the third resistor is connected with the first end of the first switching tube, the first end of the fourth resistor and the control end of the second switching tube;
the second end of the second switching tube is connected with the second end of the fourth resistor and grounded, and is used for being conducted when the first switching tube is turned off;
the second end of the fifth resistor is connected with the first end of the second switching tube and the first end of the sixth resistor;
the second end of the sixth resistor is connected with the second end of the seventh resistor and the control end of the power supply switch tube, and is used for enabling the voltage of the control end of the power supply switch tube to be smaller than the voltage of the first end of the power supply switch tube when the second switch tube is conducted so as to control the power supply switch tube to conduct, enabling the first direct current power supply to charge the voltage stabilizing capacitor bank through the power supply switch tube and supplying power to the load equipment.
Preferably, the hot plug detection and power supply unit further comprises a voltage connection interface and an overcurrent protection device;
the first end of the voltage connection interface is grounded, and the second end of the voltage connection interface is connected with the overcurrent protection device and is used for accessing the voltage of the server when the hot plug application circuit is connected with the server in operation;
the second end of the overcurrent protection device is connected with the first end of the power supply switching tube and is used for being disconnected when the hot plug application circuit is abnormally short-circuited.
Preferably, the overcurrent protection device is a fuse.
Preferably, the hot plug detection and power supply unit further includes:
the first end is grounded, and the second end is connected with a transient diode TVS of the first direct current power supply when the hot plug application circuit is connected with the running server, and the transient diode TVS is used for absorbing the instant large current and the instant large voltage of the hot plug application circuit.
Preferably, the hot plug detection and power supply unit further includes:
the first end is connected with the first end of the power supply switch tube, and the second end is connected with the protection capacitor of the control end of the power supply switch tube.
Preferably, the switch circuit includes M open Guan Yanshi circuits, an eighth resistor and a ninth resistor;
the first end of the eighth resistor is connected with the second end of the power supply switching tube, the second end of the eighth resistor is connected with the first end of the ninth resistor, and the second end of the ninth resistor is grounded;
the control end of the Kth switch delay circuit is connected with the second end of the eighth resistor, the first end of the Kth switch delay circuit is connected with the second ends of N voltage stabilizing capacitors in the voltage stabilizing capacitor group, the second end of the Kth switch delay circuit is grounded, the second ends of the N voltage stabilizing capacitors connected with the Kth switch delay circuit are controlled to be grounded after the Kth switch tube is conducted for preset delay time, the first preset delay time is different from the Kth preset delay time, M is a positive integer, K is a positive integer not greater than M, N is a positive integer, and N is equal to M=the total number of the voltage stabilizing capacitors in the voltage stabilizing capacitor group.
Preferably, the circuit comprises a delay circuit and a delay switching tube when the circuit is opened Guan Yan;
the first end of the delay circuit is connected with the second end of the eighth resistor, the second end of the delay circuit is connected with the control end of the delay switching tube, and the third end of the delay circuit is grounded and used for controlling the delay switching tube to be conducted after the power supply switching tube is conducted and the preset delay time corresponding to the power supply switching tube is passed;
the first end of the delay switch tube is connected with the second ends of the N voltage stabilizing capacitors corresponding to the delay switch tube, and the second end of the delay switch tube is grounded and used for enabling the second ends of the N voltage stabilizing capacitors connected with the delay switch tube to be grounded when the delay switch tube is conducted by the delay switch tube.
Preferably, the delay circuit comprises a delay resistor and a delay capacitor, and the delay resistor and the delay capacitor are used for controlling the on of the delay switch tube after the power switch tube is conducted and after the corresponding preset delay time is passed through the delay resistor and the delay capacitor based on the parameters of the delay resistor and the delay capacitor.
The application provides a hot plug application circuit which comprises a hot plug detection and power supply unit, a power supply switch tube, a switch circuit, a voltage stabilizing capacitor group and load equipment, wherein the power supply switch tube is connected with the hot plug detection and power supply unit; the second end of the voltage stabilizing capacitor group is not grounded when the power supply switching tube is conducted, so that the voltage stabilizing capacitor group cannot be charged in the conducting process of the power supply switching tube, namely, larger surge current cannot be generated to damage the power supply switching tube; the power supply switch tube is completely conducted after the preset delay time, the impedance is smaller, the bearable current is increased, at the moment, the second end of each capacitor of the voltage stabilizing capacitor group is grounded by the switch circuit, each capacitor in the voltage stabilizing capacitor group is charged respectively, and the charging current is not changed greatly when the capacitors are charged due to the fact that the second ends of the capacitors are grounded unevenly, so that the hot plug effect is guaranteed. According to the application, the delay of the voltage stabilizing capacitor group is controlled and the voltage stabilizing capacitor group is not charged simultaneously, so that the current and voltage variation is reduced, and the normal operation of the power supply switching tube is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required in the prior art and 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 application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hot plug device according to the prior art;
FIG. 2 is a schematic diagram of a hot plug application circuit according to the present application;
fig. 3 is a schematic structural diagram of a hot plug application circuit according to the present application.
Detailed Description
The core of the application is to provide a hot plug application circuit, which can reduce the current and voltage variation and ensure the normal operation of a power supply switch tube by controlling the delay of a voltage stabilizing capacitor group and not charging at the same time.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a hot plug application circuit provided by the present application, which includes a hot plug detection and power supply unit 1, a power supply switch tube 2, a switch circuit 3, a voltage stabilizing capacitor set 4 and a load device 5; the first end of the power supply switch tube 2 is connected with the power supply end of the hot plug detection and power supply unit 1, the control end is connected with the control end of the hot plug detection and power supply unit 1, and the second end is connected with the first end of each voltage stabilizing capacitor in the voltage stabilizing capacitor group 4 and the load equipment 5; the first end of the switching circuit 3 is connected with the second end of the switching tube, and the second end of the switching tube is connected with the second end of the voltage stabilizing capacitor group 4;
the hot plug detection and power supply unit 1 is used for controlling the power supply switch tube 2 to be conducted when the connection with the running server is detected, so as to charge the voltage stabilizing capacitor group 4 through the power supply switch tube 2 and supply power to the load equipment 5;
the switching circuit 3 is used for respectively controlling the second ground of each voltage stabilizing capacitor in the voltage stabilizing capacitor group 4 after the power supply switching tube 2 is conducted and after a preset delay time, and the second ground of each voltage stabilizing capacitor is in the same time; the preset delay time is larger than the on time of the power supply switching tube 2.
The applicant considers that the charging current of the hot plug device is controlled by adopting the hot plug controller in the hot plug device in the prior art, so that the problem that the charging current is too large to influence the operation of the running server in the hot plug process is avoided, however, because the hot plug controller in the prior art controls the charging current by controlling the grid voltage of the switching tube, the voltage stability of the load device 5 is ensured by arranging the voltage stabilizing capacitor bank 4 in the hot plug device, when the switching tube is conducted, the capacitor in the voltage stabilizing capacitor bank 4 is also charged instantly, so that larger surge current is caused, the heat accumulated by the switching tube is high and is easy to burn out due to the larger impedance in the conducting process of the switching tube, the hot plug device cannot normally operate, and has higher requirements on the SOA (safe operation area, safe operating area) of the switching tube, and in addition, the larger surge current can cause the condition that the hot plug device fires when being inserted into the running server, so that safety problems are caused.
In order to solve the above technical problems, when the hot plug detection and power supply unit 1 in the present application detects that the power supply switch tube 2 is connected to the server in operation, the switch circuit 3 is responsible for controlling each voltage stabilizing capacitor in the voltage stabilizing capacitor group 4 to charge in a fault tolerant peak time division manner, specifically, since the first end of the voltage stabilizing capacitor is connected to the second end of the power supply switch tube 2, the second end of the voltage stabilizing capacitor can be charged when the second end of the voltage stabilizing capacitor needs to be grounded, otherwise, a charging loop cannot be formed, the second end of the voltage stabilizing capacitor can be grounded through the switch circuit 3, when the power supply switch tube 2 is turned on, the switch circuit 3 controls the second ends of the voltage stabilizing capacitors to be grounded after a preset delay time, and controls the second ends of the voltage stabilizing capacitors to be grounded in an uneven manner, that is, each voltage stabilizing capacitor is charged in a different time, so as to reduce surge current.
Based on the above, after the power supply switching tube 2 is completely conducted, each voltage stabilizing capacitor starts to charge in a time-sharing manner, at the moment, the impedance of the power supply switching tube 2 is extremely small, and the surge current cannot cause great influence on the power supply switching tube 2, so that the requirement on the SOA of the power supply switching tube 2 is correspondingly reduced; in addition, each voltage-stabilizing capacitor is charged in a time-sharing manner, so that charging current after hot plug is reduced, the influence on normal operation of a server is avoided, the ignition problem during hot plug is not easy to cause, and the normal operation of the server and hot plug equipment is ensured.
In addition, by reducing the change of the current in the hot plug application circuit, the change of the voltage can be reduced at the same time, so that the normal operation of the server is ensured.
In summary, the application controls the voltage stabilizing capacitor set 4 to delay and charge at different time, so as to reduce the current and voltage variation and ensure the normal operation of the power supply switch tube 2.
Based on the above embodiments:
referring to fig. 3, fig. 3 is a schematic structural diagram of a hot plug application circuit according to the present application.
As a preferred embodiment, the hot plug detecting and power supply unit 1 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first switching tube Q1, a second switching tube Q2, a first dc power supply, and a second dc power supply;
the output end of the first direct current power supply is connected with the first end of the third resistor R3, the first end of the fifth resistor R5, the first end of the seventh resistor R7 and the first end of the power supply switch tube 2;
the first end of the first resistor R1 is connected with a second direct current power supply, and the second end is grounded when the hot plug application circuit is connected with the running server;
the first end of the second resistor R2 is connected with the second end of the first resistor R1, and the second end is grounded;
the control end of the first switch tube Q1 is connected with the second end of the first resistor R1, and the second end is grounded and is used for being turned off when the second end of the first resistor R1 is grounded;
the second end of the third resistor R3 is connected with the first end of the first switching tube Q1, the first end of the fourth resistor R4 and the control end of the second switching tube Q2;
the second end of the second switching tube Q2 is connected with the second end of the fourth resistor R4 and grounded, and is used for being turned on when the first switching tube Q1 is turned off;
the second end of the fifth resistor R5 is connected with the first end of the second switching tube Q2 and the first end of the sixth resistor R6;
the second end of the sixth resistor R6 is connected to the second end of the seventh resistor R7 and the control end of the power supply switching tube 2, so that when the second switching tube Q2 is turned on, the voltage at the control end of the power supply switching tube 2 is smaller than the voltage at the first end of the power supply switching tube 2, so as to control the power supply switching tube 2 to be turned on, and the first direct current power supply charges the voltage stabilizing capacitor set 4 through the power supply switching tube 2 and supplies power to the load device 5.
In this embodiment, the applicant considers that the hot plug controller in the prior art needs to control the gate voltage of the switching tube, so as to limit the charging current, so that the hot plug controller has higher cost and more complex circuit design, and the hot plug devices produced by different manufacturers cannot be replaced with each other, so that the application of the hot plug controller is limited.
In order to solve the above technical problems, the hot plug detection and power supply unit 1 in the present application is implemented by a plurality of resistors and switching tubes, specifically, when a server in operation is plugged in, the second end of the first resistor R1 is turned on at the in-place signal position, the second end of the first resistor R1 is grounded, correspondingly, the control end of the first switching tube Q1 is grounded, the first switching tube Q1 is turned off, at this time, the control end of the second switching tube Q2 is pulled down by the first switching tube Q1 and is switched up by the third resistor R3 and is turned on, the first end of the sixth resistor R6 is pulled down by the second switching tube Q2, the first end of the power supply switching tube 2 is the voltage of the first direct current power supply, but the control end is the voltage divided by the sixth resistor R6 and the seventh resistor R7, therefore, the voltage of the control end of the power supply switching tube 2 is smaller than the voltage of the first end, based on the control end of the first switching tube Q1, the hot plug detection and power supply unit 1 in the present application only controls the switching tube 2 to turn on, the control end of the power supply switching tube 2 is not required to be pulled down by the control end of the first switching tube Q2, compared with the control element 1, and the hot plug detection and power supply unit can be implemented by adjusting the control element in the hot plug detection and power supply unit.
The power supply switch tube 2 may be, but not limited to, a PMOS (P-Metal-Oxide-Semiconductor), where a gate of the PMOS is a control end of the power supply switch tube 2, a source of the PMOS is a first end of the power supply switch tube 2, and a drain of the PMOS is a second end of the power supply switch tube 2, so that the PMOS is turned on when a voltage of a control end of the PMOS is smaller than a voltage of the first end. In addition, because the requirements on the power supply switch tube 2 are reduced in the application, the power supply switch tubes 2 of different manufacturers can be mutually replaced, so that the application is suitable for different load equipment 5 and provides great convenience for users
The first switching tube Q1 and the second switching tube Q2 may be, but not limited to, NMOS (N-Metal-Oxide-Semiconductor), wherein the gate of the NMOS is a control end of the first switching tube Q1 or the second switching tube Q2, the drain is a first end of the first switching tube Q1 or the second switching tube Q2, and the source is a second end of the first switching tube Q1 or the second switching tube Q2, so that the NMOS is turned on when the voltage of the control end is greater than the voltage of the second end.
In addition, the hot plug detection and power supply unit 1 is realized by a plurality of resistors and a plurality of switching tubes, so that the circuit structure is simpler, and the hot plug detection and power supply unit can be suitable for different load devices 5 by changing the parameters of the resistors or the switching tubes.
The first dc power source and the second dc power source may be, but not limited to, 12V dc power, and Q3 in fig. 3 is the power supply switch tube 2.
As a preferred embodiment, the hot plug detection and power supply unit 1 further comprises a voltage connection interface and an overcurrent protection device;
the first end of the voltage connection interface is grounded, the second end is connected with the overcurrent protection device, and the voltage connection interface is used for connecting the voltage of the server when the hot plug application circuit is connected with the server in operation;
the second end of the overcurrent protection device is connected with the first end of the power supply switch tube 2 and is used for being disconnected when abnormal short circuit occurs in the hot plug application circuit.
In this embodiment, an overcurrent protection device is further provided, and when an abnormal short circuit occurs in the hot plug application circuit, the overcurrent protection device disconnects the connection between the running server and the hot plug application circuit where the server is located, so as to avoid that the server cannot work normally due to instantaneous heavy current occurring in the hot plug application circuit due to the abnormal short circuit.
The VIN in fig. 3 is a voltage connection interface connected to the server.
As a preferred embodiment, the overcurrent protection device is a fuse.
The overcurrent protection device in this embodiment may be, but not limited to, a FUSE, i.e. FUSE in fig. 3, where the FUSE can be disconnected when the current flowing through the FUSE is large, so as to avoid that the server cannot work normally due to the large current.
As a preferred embodiment, the hot plug detection and power supply unit 1 further includes:
the first end is grounded, and the second end is connected with a TVS (Transient Voltage Suppressor, transient diode) of the first direct current power supply when the hot plug application circuit is connected with the running server, and the TVS is used for absorbing the instant large current and the instant large voltage of the hot plug application circuit.
In this embodiment, the TVS is set in the hot-plug application circuit, so that when the hot-plug application circuit is pulled out from the running server, the voltage at the server end cannot be overshot due to sudden decrease of the current at the rear end, and normal operation of the server is ensured.
As a preferred embodiment, the hot plug detection and power supply unit 1 further includes:
the first end is connected with the first end of the power supply switch tube 2, and the second end is connected with a protection capacitor C9 of the control end of the power supply switch tube 2.
In this embodiment, a protection capacitor C9 is disposed between the first end and the control end of the power supply switching tube 2 to suppress voltage oscillation, so as to ensure normal operation of the power supply switching tube 2.
As a preferred embodiment, the switching circuit 3 includes M switching delay circuits, an eighth resistor R8, and a ninth resistor R9;
the first end of the eighth resistor R8 is connected with the second end of the power supply switch tube 2, the second end of the eighth resistor R8 is connected with the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is grounded;
the control end of the Kth switch delay circuit is connected with the second end of the eighth resistor R8, the first end is connected with the second ends of N voltage stabilizing capacitors in the voltage stabilizing capacitor group 4, the second end is grounded, the second ends of N voltage stabilizing capacitors connected with the power supply switch tube 2 are controlled to be grounded after the Kth preset delay time passes through after the power supply switch tube 2 is conducted, the first preset delay time is different from the Kth preset delay time, M is a positive integer, K is a positive integer not greater than M, N is a positive integer, and N is equal to M=total number of voltage stabilizing capacitors in the voltage stabilizing capacitor group 4.
In this embodiment, M switch delay circuits are set, each switch Guan Yanshi circuit is connected with N voltage stabilizing capacitors respectively, and each voltage stabilizing capacitor is connected with only one switch delay circuit, so that the preset delay time of each switch Guan Yanshi circuit is different, and the grounding time of each voltage stabilizing capacitor is ensured to be uneven, and only the voltage stabilizing capacitors connected with the same switch delay circuit are simultaneously conducted, namely, the voltage stabilizing capacitors connected with the same switch delay circuit are simultaneously charged, so that the time-sharing charging of the voltage stabilizing capacitors is realized, the charging current is reduced, and the phenomenon that the server cannot work normally due to the sudden increase of the charging current when the voltage stabilizing capacitors are charged is avoided.
It should be noted that, the first preset delay time is greater than the on time of the power supply switching tube 2, and the difference between the k+1th preset delay time and the K preset delay time is greater than the charging time of the voltage stabilizing capacitor, so as to ensure that the charging of the voltage stabilizing capacitor connected by the circuit in the time of the k+1th switch Guan Yan is performed after the charging of the N voltage stabilizing capacitors connected by the K switch delay circuit is completed.
In this embodiment, 6 voltage stabilizing capacitors, that is, C1-C6 in fig. 3, are connected to a switching delay circuit.
As a preferred embodiment, the circuit comprises a delay circuit and a delay switching tube when the circuit is opened Guan Yan;
the first end of the delay circuit is connected with the second end of the eighth resistor R8, the second end of the delay circuit is connected with the control end of the delay switching tube, and the third end of the delay circuit is grounded and used for controlling the conduction of the delay switching tube after the power supply switching tube 2 is conducted and the corresponding preset delay time passes through;
the first end of the delay switch tube is connected with the second ends of the N voltage stabilizing capacitors corresponding to the delay switch tube, and the second end of the delay switch tube is grounded and used for enabling the second ends of the N voltage stabilizing capacitors connected with the delay switch tube to be grounded when the delay switch tube is conducted by the delay switch tube.
The time delay circuit Guan Yan in this embodiment includes a delay circuit and a delay switch tube, where the delay switch tube is disposed between the second end of the voltage stabilizing capacitor and ground, and after a preset delay time corresponding to the delay circuit, the delay circuit controls the delay switch tube connected to the delay circuit to be turned on so as to make the voltage stabilizing capacitor corresponding to the delay circuit be grounded, i.e. to charge the voltage stabilizing capacitor.
The delay switch tube in this embodiment may be, but not limited to, an NMOS, where a gate of the NMOS is a control end of the delay switch tube, a drain is a first end of the delay switch tube, and a source is a second end of the delay switch tube, so that the delay switch tube is turned on when a voltage of its own control end is greater than a voltage of its second end.
Q4 and Q5 in fig. 3 are respectively delay switching transistors.
As a preferred embodiment, the delay circuit comprises a delay resistor and a delay capacitor, wherein the delay resistor and the delay capacitor are used for controlling the conduction of the delay switching tube after the conduction of the power supply switching tube 2 by a preset delay time corresponding to the delay resistor and the delay capacitor.
The delay circuit in this embodiment takes an RC delay circuit as an example, where the parameters of the delay resistor and the delay capacitor are set to set the preset delay time of the delay circuit, so that the operation is simpler and more convenient, the cost is lower, and the delay circuit can be adapted to different load devices 5.
R10 and R11 in FIG. 3 are delay resistors, and C7 and C8 are delay capacitors.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The hot plug application circuit is characterized by comprising a hot plug detection and power supply unit, a power supply switching tube, a switching circuit, a voltage stabilizing capacitor group and load equipment; the first end of the power supply switch tube is connected with the power supply end of the hot plug detection and power supply unit, the control end of the power supply switch tube is connected with the control end of the hot plug detection and power supply unit, and the second end of the power supply switch tube is connected with the first end of each voltage stabilizing capacitor in the voltage stabilizing capacitor group and the load equipment; the first end of the switching circuit is connected with the second end of the switching tube, and the second end of the switching tube is connected with the second end of the voltage stabilizing capacitor group;
the hot plug detection and power supply unit is used for controlling the power supply switching tube to be conducted when detecting that the hot plug detection and power supply unit is connected with a running server, so as to charge the voltage stabilizing capacitor group through the power supply switching tube and supply power for the load equipment;
the switching circuit is used for respectively controlling the second ends of the voltage stabilizing capacitors in the voltage stabilizing capacitor group to be grounded after the power supply switching tube is conducted and a preset delay time is passed, and the second ends of the voltage stabilizing capacitors are grounded in different time; the preset delay time is longer than the conduction time of the power supply switching tube;
the hot plug detection and power supply unit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first switching tube, a second switching tube, a first direct current power supply and a second direct current power supply;
the output end of the first direct current power supply is connected with the first end of the third resistor, the first end of the fifth resistor, the first end of the seventh resistor and the first end of the power supply switching tube;
the first end of the first resistor is connected with the second direct current power supply, and the second end is grounded when the hot plug application circuit is connected with the running server;
the first end of the second resistor is connected with the second end of the first resistor, and the second end is grounded;
the control end of the first switch tube is connected with the second end of the first resistor, and the second end of the first switch tube is grounded and is used for being turned off when the second end of the first resistor is grounded;
the second end of the third resistor is connected with the first end of the first switching tube, the first end of the fourth resistor and the control end of the second switching tube;
the second end of the second switching tube is connected with the second end of the fourth resistor and grounded, and is used for being conducted when the first switching tube is turned off;
the second end of the fifth resistor is connected with the first end of the second switching tube and the first end of the sixth resistor;
the second end of the sixth resistor is connected with the second end of the seventh resistor and the control end of the power supply switch tube, and is used for enabling the voltage of the control end of the power supply switch tube to be smaller than the voltage of the first end of the power supply switch tube when the second switch tube is conducted so as to control the power supply switch tube to be conducted, enabling the first direct current power supply tube to charge the voltage stabilizing capacitor bank through the power supply switch tube and supplying power to the load equipment;
the switch circuit comprises M switch Guan Yanshi circuits, an eighth resistor and a ninth resistor;
the first end of the eighth resistor is connected with the second end of the power supply switching tube, the second end of the eighth resistor is connected with the first end of the ninth resistor, and the second end of the ninth resistor is grounded;
the control end of the Kth switch delay circuit is connected with the second end of the eighth resistor, the first end of the Kth switch delay circuit is connected with the second ends of N voltage stabilizing capacitors in the voltage stabilizing capacitor group, the second end of the Kth switch delay circuit is grounded, the second ends of N voltage stabilizing capacitors connected with the Kth switch delay circuit are controlled to be grounded after the power supply switch tube is conducted for a Kth preset delay time, the first preset delay time is different from the Kth preset delay time, M is a positive integer, K is a positive integer not greater than M, N is a positive integer, and N is equal to the total number of the voltage stabilizing capacitors in the voltage stabilizing capacitor group;
the circuit comprises a delay circuit and a delay switching tube when the circuit is opened Guan Yan;
the first end of the delay circuit is connected with the second end of the eighth resistor, the second end of the delay circuit is connected with the control end of the delay switching tube, and the third end of the delay circuit is grounded and used for controlling the delay switching tube to be conducted after the power supply switching tube is conducted and the preset delay time corresponding to the power supply switching tube is passed;
the first end of the delay switch tube is connected with the second ends of the N voltage stabilizing capacitors corresponding to the delay switch tube, and the second end of the delay switch tube is grounded and is used for enabling the second ends of the N voltage stabilizing capacitors connected with the delay switch tube to be grounded when the delay switch tube is conducted by the delay switch tube;
the delay circuit comprises a delay resistor and a delay capacitor, wherein the delay resistor and the delay capacitor are used for controlling the conduction of the delay switching tube after the power switching tube is conducted and after the corresponding preset delay time is passed through the delay circuit based on the parameters of the delay resistor and the delay capacitor.
2. The hot plug application circuit of claim 1, wherein the hot plug detection and power supply unit further comprises a voltage connection interface and an over-current protection device;
the first end of the voltage connection interface is grounded, and the second end of the voltage connection interface is connected with the overcurrent protection device and is used for accessing the voltage of the server when the hot plug application circuit is connected with the server in operation;
the second end of the overcurrent protection device is connected with the first end of the power supply switching tube and is used for being disconnected when the hot plug application circuit is abnormally short-circuited.
3. The hot plug application circuit of claim 2, wherein the over-current protection device is a fuse.
4. The hot plug application circuit of claim 1, wherein the hot plug detection and power supply unit further comprises:
the first end is grounded, and the second end is connected with a transient diode TVS of the first direct current power supply when the hot plug application circuit is connected with the running server, and the transient diode TVS is used for absorbing the instant large current and the instant large voltage of the hot plug application circuit.
5. The hot plug application circuit of claim 1, wherein the hot plug detection and power supply unit further comprises:
the first end is connected with the first end of the power supply switch tube, and the second end is connected with the protection capacitor of the control end of the power supply switch tube.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116099.6A CN114552560B (en) | 2022-01-29 | 2022-01-29 | Hot plug application circuit |
| PCT/CN2022/102536 WO2023142371A1 (en) | 2022-01-29 | 2022-06-29 | Hot-swap application circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116099.6A CN114552560B (en) | 2022-01-29 | 2022-01-29 | Hot plug application circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114552560A CN114552560A (en) | 2022-05-27 |
| CN114552560B true CN114552560B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210116099.6A Active CN114552560B (en) | 2022-01-29 | 2022-01-29 | Hot plug application circuit |
Country Status (2)
| Country | Link |
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| CN (1) | CN114552560B (en) |
| WO (1) | WO2023142371A1 (en) |
Families Citing this family (1)
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|---|---|---|---|---|
| CN114552560B (en) * | 2022-01-29 | 2023-11-03 | 苏州浪潮智能科技有限公司 | Hot plug application circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263158Y (en) * | 2008-08-07 | 2009-06-24 | 中兴通讯股份有限公司 | Veneer electrification control device of multislot system |
| CN101854059A (en) * | 2009-04-03 | 2010-10-06 | 鸿富锦精密工业（深圳）有限公司 | Surge current suppression circuit and electronic device using same |
| CN103034608A (en) * | 2012-11-27 | 2013-04-10 | 福建星网锐捷网络有限公司 | Hot plug circuit, interface circuit and electronic equipment assembly |
| CN209994105U (en) * | 2019-06-20 | 2020-01-24 | 深圳市中创工业互联网有限公司 | Hot plug protection circuit |
| CN113675830A (en) * | 2021-10-20 | 2021-11-19 | 苏州浪潮智能科技有限公司 | Hot plug device and input voltage overshoot suppression protection circuit thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8278997B1 (en) * | 2011-10-03 | 2012-10-02 | Google Inc. | Apparatus and methodology for controlling hot swap MOSFETs |
| CN106993149B (en) * | 2017-03-23 | 2019-08-13 | 深圳市金锐显数码科技有限公司 | LVDS output protection and prevent hot plugging circuit and LVDS transmission module |
| CN110289607A (en) * | 2019-06-20 | 2019-09-27 | 深圳市中创工业互联网有限公司 | A kind of hot plug protection circuit and method |
| CN112993957B (en) * | 2021-03-19 | 2023-05-09 | 中国电子科技集团公司第二十九研究所 | Circuit and method for inhibiting power-on surge current of high-capacity capacitor |
| CN113746079B (en) * | 2021-11-04 | 2022-06-14 | 深圳市爱图仕影像器材有限公司 | Hot plug circuit, control device and equipment |
| CN114552560B (en) * | 2022-01-29 | 2023-11-03 | 苏州浪潮智能科技有限公司 | Hot plug application circuit |
-
2022
- 2022-01-29 CN CN202210116099.6A patent/CN114552560B/en active Active
- 2022-06-29 WO PCT/CN2022/102536 patent/WO2023142371A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263158Y (en) * | 2008-08-07 | 2009-06-24 | 中兴通讯股份有限公司 | Veneer electrification control device of multislot system |
| CN101854059A (en) * | 2009-04-03 | 2010-10-06 | 鸿富锦精密工业（深圳）有限公司 | Surge current suppression circuit and electronic device using same |
| CN103034608A (en) * | 2012-11-27 | 2013-04-10 | 福建星网锐捷网络有限公司 | Hot plug circuit, interface circuit and electronic equipment assembly |
| CN209994105U (en) * | 2019-06-20 | 2020-01-24 | 深圳市中创工业互联网有限公司 | Hot plug protection circuit |
| CN113675830A (en) * | 2021-10-20 | 2021-11-19 | 苏州浪潮智能科技有限公司 | Hot plug device and input voltage overshoot suppression protection circuit thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114552560A (en) | 2022-05-27 |
| WO2023142371A1 (en) | 2023-08-03 |
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