Voltage output control circuit

Abstract

The application discloses a voltage output control circuit, comprising: an electronic fuse and a capacitor adjustment module; the first end of the capacitor adjustment module receives an intelligent network card in-place signal, and the second end is grounded; when the intelligent network card exists, the capacitor value is adjusted to a first capacitor value; when the intelligent network card does not exist, the capacitor value is adjusted to a second capacitor value; the first capacitor value is smaller than the second capacitor value; the voltage input end of the electronic fuse receives a first starting voltage, the enable end receives an enable signal, the grounding end is grounded, the voltage output end is connected with the intelligent network card or a common network card, the soft starting end is connected with the third end of the capacitor adjustment module, and is used for outputting a second starting voltage at a first output rate when the capacitor value is the first capacitor value; the second starting voltage is output at a second output rate when the capacitor value is the second capacitor value; the first output rate is greater than the second output rate. Based on the voltage output control circuit provided by the application, the intelligent network card can be powered in time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, and in particular to a voltage output control circuit. BACKGROUND

[0002] With the rapid development of server performance, the data volume of server external communication is also increasing, and the intelligent network card becomes the standard configuration of many servers. In the structure of the server, there may be multiple ordinary network cards, and the power-on time of each ordinary network card in the server needs to be consistent.

[0003] In the related art, in order to realize the compatible use of the intelligent network card and the ordinary network card in the server, the power-on time of the intelligent network card is fixed and consistent with the power-on time of the ordinary network card. When the intelligent network card has different requirements for the power-on time from the ordinary network card, the related art cannot flexibly adjust the power-on time of the intelligent network card, so that the intelligent network card cannot be powered on in time, and thus cannot be normally used. SUMMARY

[0004] The present application provides a voltage output control circuit, which can flexibly adjust the power-on time of the intelligent network card to achieve the purpose that the intelligent network card can be powered on in time.

[0005] The present application provides a voltage output control circuit, which comprises an electronic fuse and a capacitor adjustment module.

[0006] The first end of the capacitor adjustment module is used to receive an intelligent network card in-place signal, and the second end of the capacitor adjustment module is grounded. When the intelligent network card in-place signal indicates the presence of an intelligent network card, the corresponding capacitor value is adjusted to a first capacitor value; and when the intelligent network card in-place signal indicates the absence of an intelligent network card, the corresponding capacitor value is adjusted to a second capacitor value, wherein the first capacitor value is less than the second capacitor value.

[0007] The voltage input end of the electronic fuse is used to receive a first start voltage, the enable end of the electronic fuse is used to receive an enable signal, the ground end of the electronic fuse is grounded, the voltage output end of the electronic fuse is connected with the intelligent network card or the ordinary network card, the soft start end of the electronic fuse is connected with the third end of the capacitor adjustment module, and is used to input a second start voltage to the intelligent network card at a first output rate when the capacitor value of the capacitor adjustment module is the first capacitor value, and to control the intelligent network card to start, and to input the second start voltage to the ordinary network card at a second output rate when the capacitor value is the second capacitor value, and to control the ordinary network card to start, wherein the first output rate is greater than the second output rate.

[0008] The voltage output control circuit provided in the application adjusts the time of outputting the second starting voltage by the soft starting end of the electronic fuse according to the size of the capacitance value of the capacitance adjustment module, specifically, the smaller the capacitance value of the capacitance adjustment module is, the shorter the time of outputting the second starting voltage by the electronic fuse is, so the capacitance value is flexibly adjusted by the capacitance adjustment module to flexibly adjust the efficiency of outputting the second starting voltage by the electronic fuse, and then the efficiency of outputting the second starting voltage by the electronic fuse is improved when the intelligent network card exists, so as to achieve the purpose that the intelligent network card can be powered in time. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0010] Figure 1 The circuit structure schematic diagram of the related art;

[0011] Figure 2 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 1 ;

[0012] Figure 3 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 2 ;

[0013] Figure 4 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 3 ;

[0014] Figure 5 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 4 ;

[0015] Figure 6 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 5 ;

[0016] Figure 7 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 6 ;

[0017] Figure 8 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 7 ;

[0018] Figure 9 The structure schematic of the voltage output control circuit provided in the embodiments of the application Figure 8 ;

[0019] Figure 10 Structure diagram of voltage output control circuit provided for the embodiment of the present application Figure 9 ;

[0020] Figure 11 Structure diagram of voltage output control circuit provided for the embodiment of the present application Figure 10 ;

[0021] Figure 12 Structure diagram of voltage output control circuit provided for the embodiment of the present application Figure 10 One.

[0022] Among them, the above-mentioned drawings include the following reference signs:

[0023] C10: input capacitor;

[0024] C20: output capacitor;

[0025] C30: power-on capacitor;

[0026] C1: first capacitor;

[0027] C2: second capacitor;

[0028] C3: third capacitor;

[0029] C4: fourth capacitor;

[0030] C5: fifth capacitor;

[0031] Q1: first control switch;

[0032] Q2: second control switch;

[0033] Q3: third control switch;

[0034] Q4: fourth control switch;

[0035] Q5: fifth control switch;

[0036] R1: first resistor;

[0037] R2: second resistor;

[0038] R3: third resistor;

[0039] R4: fourth resistor;

[0040] R5: fifth resistor;

[0041] R6: sixth resistor;

[0042] R7: seventh resistor;

[0043] D: diode. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, any other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0045] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. The terms "parallel", "perpendicular", "equal" include the described cases and the approximately similar cases to the described cases, and the approximately similar cases are within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art considering the measurement being discussed and the error related to the measurement of a specific quantity (i.e. the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, and the acceptable deviation range of approximately parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximately perpendicular, and the acceptable deviation range of approximately perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, and the acceptable deviation range of approximate equality can be, for example, that the difference between the two equalities is less than or equal to 5% of either one. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] With the rapid development of server performance, the data volume of external communication of the server is also increasing, and the intelligent network card becomes the standard configuration of many servers. In the structure of the server, there can be multiple ordinary network cards, and the power-on time of each ordinary network card in the server needs to be consistent.

[0047] Figure 1As a circuit structure schematic diagram of the related art, the voltage input end Vin of the electronic fuse receives a first start voltage, which is generally 12V, and the electronic fuse is started through the first start voltage. The voltage output end Vout of the electronic fuse outputs a second start voltage, which is also generally 12V, and the second start voltage is a power supply for powering the intelligent network card or the standard network card. The enable end EN of the electronic fuse is used to receive an enable signal, and the enable signal can be sent through a complex programmable logic device (CPLD). The input capacitor C10 and the output capacitor C20 are respectively used to filter the first start voltage and the second start voltage. The power-on capacitor C30 connected to the soft start (SS) end determines the time for the electronic fuse to output the second start voltage, thereby determining the power-on time of the intelligent network card or the ordinary network card connected to the electronic fuse. The electronic fuse (eFuse) is a programmable electronic fuse, which belongs to a non-volatile memory device and realizes a protection function through electronic injection and thermal effect. The core principle is to use a short current pulse to cause thermal electron emission, so that a high temperature is generated when the current passes through a very thin wire, resulting in a permanent open circuit. This process is irreversible, and once it is fused, it cannot be programmed again. The core difference between the intelligent network card and the traditional ordinary network card lies in the hardware acceleration capability and the task offloading function. The intelligent network card realizes hardware offloading of network protocol processing, encryption and decryption, etc. through a special processor and a programmable architecture, significantly reducing the load of the central processing unit (CPU) and improving the performance.

[0048] In combination Figure 1 , in order to realize the compatible use of the intelligent network card and the ordinary network card in the server, the related art uses the electronic fuse to compatibly use the intelligent network card and the ordinary network card, but a single electronic fuse supports the intelligent network card or a single ordinary network card. When there are multiple ordinary network cards in the server, the power-on times of the multiple ordinary network cards need to be consistent, so the power-on time of the ordinary network card connected to the electronic fuse needs to be consistent with the power-on times of the other ordinary network cards, and therefore the power-on time corresponding to the electronic fuse is fixed. Therefore, when there is an intelligent network card in the server, the power-on time of the intelligent network card by the electronic fuse is also fixed and consistent with the power-on time of the ordinary network card. When the intelligent network card has different requirements for the power-on time from the ordinary network card, the related art cannot flexibly adjust the power-on time of the intelligent network card, thereby causing the intelligent network card to fail to be powered on in time and thus fail to be normally used.

[0049] The embodiment of the application adds a capacitor adjustment module, the soft start end of the electronic fuse is connected with the third end of the capacitor adjustment module, and is used for adjusting the time of outputting the second starting voltage according to the size of the capacitance value of the capacitor adjustment module, so as to flexibly adjust the efficiency of the electronic fuse outputting the second starting voltage, and then guarantee the efficiency of the electronic fuse outputting the second starting voltage when the intelligent network card exists, so as to achieve the purpose that the intelligent network card can be powered in time.

[0050] In order for those skilled in the art to better understand the scheme of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0051] Figure 2 Structure diagram of the voltage output control circuit provided by the embodiment of the application Figure 1 As shown in Figure 2 , comprising: an electronic fuse and a capacitor adjustment module; the first end of the capacitor adjustment module is used for receiving an intelligent network card presence signal, the second end of the capacitor adjustment module is grounded, when the intelligent network card presence signal represents that the intelligent network card exists, the corresponding capacitance value is adjusted to a first capacitance value, and when the intelligent network card presence signal represents that the intelligent network card does not exist, the corresponding capacitance value is adjusted to a second capacitance value, wherein the first capacitance value is less than the second capacitance value; the voltage input end of the electronic fuse is used for receiving a first starting voltage, the enable end of the electronic fuse is used for receiving an enable signal, the ground end of the electronic fuse is grounded, the voltage output end of the electronic fuse is connected with an intelligent network card or a general network card, and the soft start end of the electronic fuse is connected with the third end of the capacitor adjustment module, which is used for adjusting the time of outputting a second starting voltage according to the size of the capacitance value of the capacitor adjustment module and based on the enable signal, when the capacitance value is the first capacitance value, the second starting voltage is input to the intelligent network card at a first output rate to control the intelligent network card to start, and when the capacitance value is the second capacitance value, the second starting voltage is input to the general network card at a second output rate to control the general network card to start, wherein the first output rate is greater than the second output rate.

[0052] In combination with a scene example, in combination with the foregoing related technology, the first starting voltage and the second starting voltage are both 12V, the first starting voltage is used for starting the electronic fuse, and the second starting voltage is used for starting the intelligent network card or the general network card connected with the voltage output end. The intelligent network card presence signal can be a high-level or low-level pulse signal, specifically, when the intelligent network card presence signal is low, it represents that the network card connected with the voltage output end of the electronic fuse is an intelligent network card, and vice versa, when the intelligent network card presence signal is high, it represents that the voltage output end of the electronic fuse is connected with a general network card.

[0053] The capacitance received by the soft start end of the electronic fuse directly determines the efficiency of the electronic fuse outputting the second starting voltage. Specifically, the greater the capacitance received by the soft start end of the electronic fuse, the longer the time for the electronic fuse to output 12V voltage, and the lower the efficiency of outputting 12V voltage. Generally, the power-on time of the intelligent network card is earlier than that of the ordinary network card, so for the intelligent network card, a higher output efficiency is needed to power it on. Therefore, when the intelligent network card in-place signal is low, the capacitance value of the capacitance adjustment module can be adjusted to a first capacitance value with a lower capacitance value, so that the electronic fuse outputs 12V voltage at a higher first output rate in response to the enable signal. When the intelligent network card in-place signal is high, the capacitance value of the capacitance adjustment module can be adjusted to a second capacitance value with a higher capacitance value, so that the electronic fuse outputs 12V voltage at a lower second output rate in response to the enable signal. In addition, the size of the first capacitance value can be flexibly adjusted according to the specific power-on time of the intelligent network card, so as to achieve the purpose of flexibly adjusting the power-on time of the intelligent network card. Based on the voltage output control circuit provided in the example, when the intelligent network card exists, the capacitance value of the capacitance adjustment module is reduced to improve the efficiency of the electronic fuse outputting the second starting voltage, so as to achieve the purpose that the intelligent network card can be powered on in time.

[0054] Optionally, Figure 3 Structure of the voltage output control circuit provided by the embodiment of the present application Figure 2 As Figure 3 shown, the capacitance adjustment module includes a first capacitor C1, a second capacitor C2, and a control switch module. The first end of the first capacitor C1 is connected to the soft start end of the electronic fuse, and the second end of the first capacitor C1 is grounded. The first end of the second capacitor C2 is connected to the soft start end of the electronic fuse, and the second end of the second capacitor C2 is connected to the first end of the control switch module. The second end of the control switch module is used to receive the intelligent network card in-place signal, and the third end of the control switch module is grounded, used to control the second capacitor C2 to be disconnected when the intelligent network card in-place signal indicates that the intelligent network card exists, and used to control the second capacitor C2 to be turned on when the intelligent network card in-place signal indicates that the intelligent network card does not exist.

[0055] With the scene example, when the control switch module receives the low-level smart NIC in-place signal, the voltage output end of the electronic fuse is connected to the smart NIC, the control switch module controls the second capacitor C2 to be disconnected, at this time, the soft start end of the electronic fuse receives the capacitance value of the first capacitor C1. When the control switch module receives the high-level smart NIC in-place signal, the voltage output end of the electronic fuse is connected to the ordinary NIC, the control switch module controls the second capacitor C2 to be connected, at this time, the first capacitor C1 and the second capacitor C2 are connected in parallel, and the soft start end of the electronic fuse receives the sum of the capacitance values of the first capacitor C1 and the second capacitor C2. Based on the voltage output control circuit provided in the example, the on-off state of the second capacitor C2 can be controlled by the control switch module, so as to flexibly adjust the capacitance value received by the soft start end of the electronic fuse.

[0056] Optionally, Figure 4 The voltage output control circuit provided in the embodiment of the application Figure 3 As Figure 4 As shown in the figure, the control switch module includes a first control switch Q1, a second control switch Q2 and a third control switch Q3. The control end of the first control switch Q1 is used to receive the smart NIC in-place signal and the standby power signal, the first end of the first control switch Q1 is used to receive the standby power signal, and the second end of the first control switch Q1 is grounded, which is used to be disconnected when the smart NIC in-place signal is low and to be connected when the smart NIC in-place signal is high. The smart NIC in-place signal is low when there is a smart NIC, and is high when there is no smart NIC. The control end of the second control switch Q2 is connected to the first end of the first control switch Q1, the first end of the second control switch Q2 is used to receive the standby power signal, and the second end of the second control switch Q2 is grounded, which is used to be disconnected when the first control switch Q1 is connected and to be connected when the first control switch Q1 is disconnected. The control end of the third control switch Q3 is connected to the first end of the second control switch Q2, the first end of the third control switch Q3 is connected to the second end of the second capacitor C2, and the second end of the third control switch Q3 is grounded, which is used to control the second capacitor C2 to be disconnected when the second control switch Q2 is connected and to be connected when the second control switch Q2 is disconnected.

[0057] In combination with the scenario example, the standby power signal is usually a 3.3V power supply, and the conduction of the first control switch Q1 depends on the smart NIC in-place signal. Specifically, when the electronic fuse is connected to the smart NIC, the smart NIC in-place signal is low, at this time, the control end of the first control switch Q1 is pulled low to the low level, so the first control switch Q1 is disconnected. At this time, the first end of the first control switch Q1 is pulled to the high level, that is, the control end of the second control switch Q2 is high, so at this time, the second control switch Q2 is turned on, causing the first segment of the second control switch Q2 to be pulled to the low level, that is, the control end of the third control switch Q3 is low, so at this time, the third control switch Q3 is disconnected, which causes the second capacitor C2 to be disconnected, so that when the electronic fuse is connected to the smart NIC, the capacitor value received by the soft start end of the electronic fuse is the capacitor value of the first capacitor C1.

[0058] In addition, when the electronic fuse is connected to the ordinary NIC, the smart NIC in-place signal is high, at this time, the control end of the first control switch Q1 is pulled to the high level, so the first control switch Q1 is turned on. At this time, the first end of the first control switch Q1 is pulled low to the low level, that is, the control end of the second control switch Q2 is low, so at this time, the second control switch Q2 is disconnected, causing the first segment of the second control switch Q2 to be pulled to the high level, that is, the control end of the third control switch Q3 is high, so at this time, the third control switch Q3 is turned on, which causes the second capacitor C2 to be turned on, so that when the electronic fuse is connected to the ordinary NIC, the capacitor value received by the soft start end of the electronic fuse is the sum of the capacitor values of the first capacitor C1 and the second capacitor C2.

[0059] Based on the voltage output control circuit provided in the example, the conduction state of the second capacitor C2 can be flexibly controlled by designing three control switches in series, so as to flexibly adjust the capacitor value received by the soft start end of the electronic fuse.

[0060] Optionally, Figure 5 The structure of the voltage output control circuit provided in the embodiment of the application is shown in Figure 4 As shown in Figure 5 The control switch module further includes a first resistor R1, a second resistor R2, and a third resistor R3. The first end of the first resistor R1 is configured to receive the standby power signal, and the second end of the first resistor R1 is connected to the control end of the first control switch Q1, for reducing the current in the path. The first end of the second resistor R2 is configured to receive the standby power signal, and the second end of the second resistor R2 is connected to the control end of the second control switch Q2, for reducing the current in the path. The first end of the third resistor R3 is configured to receive the standby power signal, and the second end of the third resistor R3 is connected to the control end of the third control switch Q3, for reducing the current in the path.

[0061] In combination with the scenario example, the first resistor R1 is used to achieve the purpose that the control end of the first control switch Q1 is controlled by the smart NIC in-place signal. The first resistor R1, the second resistor R2, and the third resistor R3 are used to reduce the current in the path, so as to ensure the safety of the first control switch Q1, the second control switch Q2, and the third control switch Q3.

[0062] Optionally, Figure 6 The voltage output control circuit provided in the embodiment of the present application Figure 5 As shown in Figure 6 The voltage output control circuit further includes a delay module. The first end of the delay module is configured to receive an enable signal. The second end of the delay module is connected to the first end of the first control switch Q1, and is configured to monitor the state of the first control switch Q1. The third end of the delay module is connected to the enable end of the electronic fuse, and is configured to transmit the enable signal to the electronic fuse at a first transmission time when the first control switch Q1 is turned on, and to transmit the enable signal to the electronic fuse at a second transmission time when the first control switch Q1 is turned off, where the second transmission time is greater than the first transmission time.

[0063] In combination with the scenario example, it can be known from the foregoing that when the voltage output end of the electronic fuse is connected to the smart NIC, the control switch module needs to cut off the connection of the second capacitor C2. The cutting off of the second capacitor C2 needs a certain time. Therefore, in order to avoid the enable signal being input to the electronic fuse before the cutting off of the second capacitor C2, so that the electronic fuse starts to work, a clamping circuit, specifically a delay module, can be added to the voltage output control circuit. Specifically, the second end of the delay module is configured to monitor the state of the first control switch Q1. When the first control switch Q1 is at a high level, it indicates that the first control switch Q1 is in an off state. At this time, the voltage output end of the electronic fuse is connected to the smart NIC. At this time, the delay module prolongs the time of inputting the enable signal to the electronic fuse, so as to ensure that the electronic fuse starts after the cutting off of the second capacitor C2 is completed. When the first control switch Q1 is at a low level, it indicates that the first control switch Q1 is in an on state. At this time, the voltage output end of the electronic fuse is connected to the ordinary NIC. At this time, the delay module does not need to prolong the time of inputting the enable signal to the electronic fuse, and the electronic fuse can start normally.

[0064] The voltage output control circuit provided in the present example can ensure that the electronic fuse starts after the cutting off of the second capacitor C2 is completed, and avoid the early start of the electronic fuse.

[0065] Optionally, Figure 7 The voltage output control circuit provided in the embodiment of the present application Figure 6 As shown in Figure 7As shown, the delay module comprises: a fourth control switch Q4, a fifth control switch Q5, a discharging module and a level control module; a control end of the fourth control switch Q4 is configured to receive an enable signal, a first end of the fourth control switch Q4 and a first end of the discharging module are connected, a second end of the fourth control switch Q4 is grounded, and the fourth control switch Q4 is configured to be turned on when the enable signal is high and turned off when the enable signal is low; a second end of the discharging module is configured to receive a standby power signal, a third end of the discharging module and a first end of the first control switch Q1 and a control end of the fifth control switch Q5 are connected, and the discharging module is configured to discharge when the fourth control switch Q4 is turned on; a first end of the fifth control switch Q5 and a first end of the level control module are connected, a second end of the fifth control switch Q5 is grounded, and the fifth control switch Q5 is configured to be turned off when the control end of the fifth control switch Q5 is lower than a turn-on voltage; and a second end of the level control module is configured to receive the enable signal, a third end of the level control module and an enable end of the electronic fuse are connected, and the level control module is configured to transmit the enable signal to the electronic fuse when the fifth control switch Q5 is turned off.

[0066] In combination with the scene example, the enable signal is generated and sent by the CPLD, and the CPLD first monitors the smart network card before generating the enable signal. At this time, the control end of the fourth control switch Q4 does not monitor the enable signal, so the control end of the fourth control switch Q4 is low, and the fourth control switch Q4 is not turned on at this time. The first end of the fourth control switch Q4 is high. At this time, the discharging module will not discharge, so the third end of the discharging module is high, and the control end of the fifth control switch Q5 is high, the fifth control switch Q5 is turned on, and the first end of the fifth control switch Q5 is low. The first end, the second end and the third end of the level control module are all low, so the enable end of the electronic fuse is low, and the electronic fuse does not receive the enable signal and does not start working.

[0067] The CPLD generates a high-level enable signal after monitoring the smart network card. At this time, the control end of the fourth control switch Q4 is high, the fourth control switch Q4 is turned on, and the first end of the fourth control switch Q4 is low. At this time, the discharging module starts discharging through the fourth control switch Q4. During the discharging process of the discharging module, the voltage at the third end of the discharging module will gradually decrease until the voltage at the third end of the discharging module is lower than the turn-on voltage of the fifth control switch Q5, the fifth control switch Q5 is turned off, and the first end of the fifth control switch Q5 is in a floating state. At this time, the third end of the level control module is configured to be high, so the enable end of the electronic fuse is high, indicating that the electronic fuse receives the enable signal and can start working.

[0068] The CPLD also generates a high level enable signal when the intelligent network card is not monitored. At this time, the first end of the first control switch Q1 is low, and the fifth control switch Q5 is disconnected. At this time, the third end of the level control module is configured as a high level, so that the enable end of the electronic fuse is high, indicating that the electronic fuse receives the enable signal and can start working.

[0069] Based on the voltage output control circuit provided in the example, when the electronic fuse is connected to the intelligent network card, the slow discharge of the discharge module can delay the time when the enable signal reaches the electronic fuse.

[0070] Optionally, Figure 8 The voltage output control circuit provided in the example Figure 7 As shown in Figure 8 The first control switch Q1, the second control switch Q2, the third control switch Q3, the fourth control switch Q4 and the fifth control switch Q5 are all metal-oxide-semiconductor field-effect transistors.

[0071] In combination with the scene example, the control switch can be an N-type metal-oxide-semiconductor field-effect transistor (MOSFET). The control end of each control switch is the gate of the N-type metal-oxide-semiconductor field-effect transistor. The first end of each control switch is the drain of the N-type metal-oxide-semiconductor field-effect transistor. The second end of each control switch is the source of the N-type metal-oxide-semiconductor field-effect transistor. The gate voltage corresponding to the gate is the voltage applied between the gate and the source, which is used to control the conduction and cutoff of the metal-oxide-semiconductor field-effect transistor. The drain voltage corresponding to the drain is the voltage applied between the drain and the source, which reflects the electric field distribution and current flow in the metal-oxide-semiconductor field-effect transistor. When the drain voltage is small, the metal-oxide-semiconductor field-effect transistor is in the linear region, and the current is basically proportional to the drain voltage. When the drain voltage increases to a certain extent, the metal-oxide-semiconductor field-effect transistor enters the saturation region, and the current almost no longer changes with the drain voltage. The source voltage corresponding to the source is the voltage between the source of the metal-oxide-semiconductor field-effect transistor and the reference potential of the system. The source is generally grounded or connected to a low potential. The N-type MOSFET has fast switching speed and fast response speed, which can improve the efficiency of signal transmission in the circuit.

[0072] Optionally, Figure 9 The voltage output control circuit provided in the example Figure 8 As shown in Figure 9As shown, the discharging module comprises a fourth resistor R4 and a third capacitor C3; a first end of the fourth resistor R4 and a first end of the fourth control switch Q4 are connected, a second end of the fourth resistor R4 and a second end of the third capacitor C3 are connected, and a first end of the third capacitor C3 is configured to receive the standby power supply signal; and the third capacitor C3 is configured to discharge through the fourth resistor R4 when the fourth control switch Q4 is turned on.

[0073] In combination with a scene example, the discharging module is composed of the fourth resistor R4 and the third capacitor C3; when the fourth control switch Q4 is turned on, the electric quantity stored in the third capacitor C3 can be discharged to ground through the fourth resistor R4 and the fourth control switch Q4, and the third capacitor C3 is discharged through the fourth resistor R4. The resistance value of the fourth resistor R4 can be flexibly adjusted to flexibly adjust the discharging rate, so as to flexibly adjust the time for the enable signal to reach the electronic fuse.

[0074] Optionally, Figure 10 A structure diagram of the voltage output control circuit provided by the embodiment of the present application Figure 9 As shown in the structure diagram of the voltage output control circuit provided by the embodiment of the present application, Figure 10 As shown, the discharging module further comprises a fifth resistor R5; a first end of the fifth resistor R5 and a first end of the third capacitor C3 are connected, and a second end of the fifth resistor R5 and a second end of the third capacitor C3 are connected, and the fifth resistor R5 is configured to reduce the current in the path.

[0075] In combination with a scene example, the fifth resistor R5 and the third capacitor C3 are connected in parallel, and the fifth resistor R5 can reduce the current in the circuit to protect the safety of the third capacitor C3.

[0076] Optionally, Figure 11 A structure diagram of the voltage output control circuit provided by the embodiment of the present application Figure 10 As shown in the structure diagram of the voltage output control circuit provided by the embodiment of the present application, Figure 11 As shown, the level control module comprises a sixth resistor R6 and a seventh resistor R7; a first end of the sixth resistor R6 is configured to receive the enable signal, a first end of the seventh resistor R7 and a first end of the fifth control switch Q5 are connected, a second end of the sixth resistor R6 and a second end of the seventh resistor R7 are connected, and a second end of the seventh resistor R7 and an enable end of the electronic fuse are connected, wherein the resistance value of the sixth resistor R6 is greater than the resistance value of the seventh resistor R7.

[0077] With the scene example, after the CPLD generates the high-level enable signal, the signal at the first end of the sixth resistor R6 is high level. If the electronic fuse is connected to the smart network card, the fifth control switch Q5 is first turned on, so the first end of the fifth control switch Q5 is low level, and the first end of the seventh resistor R7 is low level at this time. Since the resistance value of the sixth resistor R6 is greater than that of the seventh resistor R7, the second ends of the sixth resistor R6 and the seventh resistor R7 are low level at this time, that is, the enable end of the electronic fuse is low level. With the discharge of the discharge module, the fifth control switch Q5 is disconnected, so the first end of the fifth control switch Q5 is suspended at this time, and the second ends of the sixth resistor R6 and the seventh resistor R7 are high level, that is, the enable end of the electronic fuse is high level. Based on the voltage output control circuit provided in the example, by configuring the resistance value of the sixth resistor R6 to be greater than that of the seventh resistor R7, the purpose of delaying the time for the enable signal to reach the electronic fuse can be achieved.

[0078] Optionally, Figure 12 The structure of the voltage output control circuit provided in the embodiment of the application Figure 10 As shown in Figure 12 The voltage output control circuit further includes a fourth capacitor C4, a fifth capacitor C5, and a diode D. The first end of the fourth capacitor C4 is connected to the voltage input end of the electronic fuse, and the second end of the fourth capacitor C4 is grounded, for filtering the first start voltage. The first end of the fifth capacitor C5 is connected to the voltage output end of the electronic fuse, and the second end of the fifth capacitor C5 is grounded, for filtering the second start voltage. The first end of the diode D is connected to the second end of the fifth resistor R5, and the second end of the diode D is connected to the first end of the first control switch Q1, for preventing the current in the path from flowing in reverse.

[0079] With the scene example, in combination Figure 1 The fourth capacitor C4 corresponds to the input capacitor C10, for filtering the first start voltage input to the electronic fuse, to improve the signal quality of the first start voltage. The fifth capacitor C5 corresponds to the output capacitor C20, for filtering the second start voltage output by the electronic fuse, to improve the signal quality of the second start voltage.

[0080] In addition, when the electronic fuse is connected to the ordinary network card, the first end of the first control switch Q1 is low level, and the third capacitor C3 in the discharge module can directly pass through the first control switch Q1 to achieve fast discharge. At this time, by configuring the diode D between the third capacitor C3 and the first control switch Q1, the reverse flow of the current during discharge can be prevented.

[0081] In summary, by means of the voltage output control circuit provided in the embodiments of the present application, the soft start end of the electronic fuse and the third end of the capacitor adjustment module are connected, and the time of outputting the second starting voltage is adjusted according to the size of the capacitance value of the capacitor adjustment module, so as to flexibly adjust the efficiency of the electronic fuse outputting the second starting voltage, and further to improve the efficiency of the electronic fuse outputting the second starting voltage when the intelligent network card exists, so as to achieve the purpose that the intelligent network card can be powered in time.

[0082] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. Each technical feature of the above embodiments can be combined arbitrarily, and in order to make the description concise, each technical feature of the above embodiments and various possible combinations are not described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application. It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof.

[0083] The above describes in detail a voltage output control circuit provided by the present application. The principles and implementation modes of the present application are described by applying specific examples, and the above embodiment description is only used to help understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A voltage output control circuit, characterized by, The application relates to an electronic fuse and a capacitor adjustment module. The first end of the capacitor adjustment module is used for receiving an intelligent network card in-place signal, and the second end of the capacitor adjustment module is grounded; when the intelligent network card in-place signal indicates that an intelligent network card exists, the corresponding capacitor value is adjusted to a first capacitor value; and when the intelligent network card in-place signal indicates that an intelligent network card does not exist, the corresponding capacitor value is adjusted to a second capacitor value, wherein the first capacitor value is smaller than the second capacitor value. The voltage input end of the electronic fuse is used for receiving a first starting voltage, the enable end of the electronic fuse is used for receiving an enable signal, the ground end of the electronic fuse is grounded, the voltage output end of the electronic fuse is connected with an intelligent network card or a common network card, and the soft start end of the electronic fuse is connected with the third end of the capacitor adjustment module; according to the size of the capacitor value of the capacitor adjustment module and based on the enable signal, when the capacitor value is the first capacitor value, a second starting voltage is input to the intelligent network card at a first output rate to control the starting of the intelligent network card; and when the capacitor value is the second capacitor value, the second starting voltage is input to the common network card at a second output rate to control the starting of the common network card, wherein the first output rate is greater than the second output rate. The capacitor adjustment module comprises a first capacitor (C1), a second capacitor (C2) and a control switch module.

2. The voltage output control circuit of claim 1, wherein, The first end of the first capacitor (C1) is connected with the soft start end of the electronic fuse, and the second end of the first capacitor (C1) is grounded. The first end of the second capacitor (C2) is connected with the soft start end of the electronic fuse, and the second end of the second capacitor (C2) is connected with the first end of the control switch module. The second end of the control switch module is used for receiving an intelligent network card in-place signal, and the third end of the control switch module is grounded; when the intelligent network card in-place signal indicates that an intelligent network card exists, the second capacitor (C2) is controlled to be disconnected; and when the intelligent network card in-place signal indicates that an intelligent network card does not exist, the second capacitor (C2) is controlled to be turned on. The control switch module comprises a first control switch (Q1), a second control switch (Q2) and a third control switch (Q3).

3. The voltage output control circuit of claim 2, wherein, The control end of the first control switch (Q1) is used for receiving an intelligent network card in-place signal and a standby power signal, the first end of the first control switch (Q1) is used for receiving the standby power signal, and the second end of the first control switch (Q1) is grounded; when the intelligent network card in-place signal is at a low level, the first control switch (Q1) is disconnected; and when the intelligent network card in-place signal is at a high level, the first control switch (Q1) is turned on, wherein when the intelligent network card in-place signal is at a low level, it indicates that an intelligent network card exists; and when the intelligent network card in-place signal is at a high level, it indicates that an intelligent network card does not exist. ​ The control end of the second control switch (Q2) is connected with the first end of the first control switch (Q1), the first end of the second control switch (Q2) is used for receiving the standby power signal, and the second end of the second control switch (Q2) is grounded, used for being turned off when the first control switch (Q1) is turned on and being turned on when the first control switch (Q1) is turned off; The control end of the third control switch (Q3) is connected with the first end of the second control switch (Q2), the first end of the third control switch (Q3) is connected with the second end of the second capacitor (C2), and the second end of the third control switch (Q3) is grounded, used for controlling the second capacitor (C2) to be turned off when the second control switch (Q2) is turned on and controlling the second capacitor (C2) to be turned on when the second control switch (Q2) is turned off.

4. The voltage output control circuit of claim 3, wherein, The control switch module further comprises a first resistor (R1), a second resistor (R2) and a third resistor (R3); The first end of the first resistor (R1) is used for receiving the standby power signal, and the second end of the first resistor (R1) is connected with the control end of the first control switch (Q1), used for reducing the current in the path; The first end of the second resistor (R2) is used for receiving the standby power signal, and the second end of the second resistor (R2) is connected with the control end of the second control switch (Q2), used for reducing the current in the path; The first end of the third resistor (R3) is used for receiving the standby power signal, and the second end of the third resistor (R3) is connected with the control end of the third control switch (Q3), used for reducing the current in the path.

5. The voltage output control circuit of claim 4, wherein, The voltage output control circuit further comprises a delay module; The first end of the delay module is used for receiving an enable signal; The second end of the delay module is connected with the first end of the first control switch (Q1), used for monitoring the state of the first control switch (Q1); The third end of the delay module is connected with the enable end of the electronic fuse, used for transmitting the enable signal to the electronic fuse with a first transmission time when the first control switch (Q1) is turned on and transmitting the enable signal to the electronic fuse with a second transmission time when the first control switch (Q1) is turned off, wherein the second transmission time is greater than the first transmission time.

6. The voltage output control circuit of claim 5, wherein, The delay module comprises a fourth control switch (Q4), a fifth control switch (Q5), a discharging module and a level control module; The control end of the fourth control switch (Q4) is used for receiving the enable signal, the first end of the fourth control switch (Q4) is connected with the first end of the discharging module, and the second end of the fourth control switch (Q4) is grounded, used for being turned on when the enable signal is at a high level and being turned off when the enable signal is at a low level; The second end of the discharging module is used for receiving the standby power signal, the third end of the discharging module is connected with the first end of the first control switch (Q1) and the control end of the fifth control switch (Q5), used for discharging when the fourth control switch (Q4) is turned on. A first end of the fifth control switch (Q5) is connected to a first end of the level control module, and a second end of the fifth control switch (Q5) is grounded, for being turned off when a control end of the fifth control switch (Q5) is lower than a turn-on voltage; A second end of the level control module is used for receiving the enable signal, and a third end of the level control module is connected to an enable end of the electronic fuse, for transmitting the enable signal to the electronic fuse when the fifth control switch (Q5) is turned off.

7. The voltage output control circuit of claim 6, wherein, The discharge module comprises a fourth resistance (R4) and a third capacitor (C3); A first end of the fourth resistance (R4) is connected to a first end of the fourth control switch (Q4), a second end of the fourth resistance (R4) is connected to a second end of the third capacitor (C3), and a first end of the third capacitor (C3) is used for receiving the standby power signal, for discharging through the fourth resistance (R4) when the fourth control switch (Q4) is turned on.

8. The voltage output control circuit of claim 7, wherein, The discharge module further comprises a fifth resistance (R5); A first end of the fifth resistance (R5) is connected to the first end of the third capacitor (C3), and a second end of the fifth resistance (R5) is connected to the second end of the third capacitor (C3), for reducing a current in a path.

9. The voltage output control circuit of claim 8, wherein, The level control module comprises a sixth resistance (R6) and a seventh resistance (R7); A first end of the sixth resistance (R6) is used for receiving the enable signal, a first end of the seventh resistance (R7) is connected to the first end of the fifth control switch (Q5), a second end of the sixth resistance (R6) is connected to a second end of the seventh resistance (R7), and the second end of the seventh resistance (R7) is connected to the enable end of the electronic fuse, wherein a resistance value of the sixth resistance (R6) is greater than a resistance value of the seventh resistance (R7).

10. The voltage output control circuit of claim 9, wherein, The voltage output control circuit further comprises a fourth capacitor (C4), a fifth capacitor (C5), and a diode (D); A first end of the fourth capacitor (C4) is connected to a voltage input end of the electronic fuse, and a second end of the fourth capacitor (C4) is grounded, for filtering the first start voltage; A first end of the fifth capacitor (C5) is connected to a voltage output end of the electronic fuse, and a second end of the fifth capacitor (C5) is grounded, for filtering the second start voltage; A first end of the diode (D) is connected to the second end of the fifth resistance (R5), and a second end of the diode (D) is connected to the first end of the first control switch (Q1), for preventing a current in a path from flowing reversely.

Images