Docking station management circuit and docking station

Abstract

The invention provides a docking station management circuit and a docking station. The docking station management circuit comprises a docking station state detection module, a switch module, a charging protocol chip and a processing module, the main interface is connected with the power supply end of the charging protocol chip through the switch module, and the power supply end of the charging protocol chip is connected with the expansion interface; the output end of the docking station state detection module is connected with the input end of the processing module, the first output end of the processing module is connected with the control end of the switch module, and the second output end of the processing module is connected with the control end of the charging protocol chip. The docking station state detection module is arranged to detect the operation state of the docking station, and the processing module controls the switch module and the charging protocol chip according to the operation state, so that the charging protocol chip can be switched on and off when the docking station is abnormal. And the input path and the output path of the voltage are timely cut off through the switch module and the charging protocol chip, so that the docking station or the expansion equipment is prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the field of expansion docks, and in particular to an expansion dock management circuit and an expansion dock. Background Art

[0002] When the expansion dock is in operation, abnormal conditions such as overtemperature or excessive current may occur, which may cause the expansion dock or expansion equipment to burn out in severe cases. Summary of the invention

[0003] The main purpose of the present invention is to provide a docking station management circuit and a docking station, aiming to solve the problem of the prior art on how to ensure the safety of the docking station and the expansion device when an abnormal situation occurs in the docking station.

[0004] To achieve the above-mentioned purpose, the present invention provides a docking station management circuit, which is connected to a main interface and an expansion interface respectively; the docking station management circuit comprises a docking station state detection module, a switch module, a charging protocol chip and a processing module; the main interface is connected to the power supply end of the charging protocol chip through the switch module, and the power supply end of the charging protocol chip is connected to the expansion interface; the output end of the docking station state detection module is connected to the input end of the processing module, the first output end of the processing module is connected to the control end of the switch module, and the second output end of the processing module is connected to the control end of the charging protocol chip; wherein:

[0005] The docking station state detection module is used to detect the operating state of the docking station, obtain a detection signal, and send the detection signal to the processing module;

[0006] The processing module is used to receive the detection signal sent by the docking station state detection module, determine the operating state of the docking station according to the detection signal, and send a control signal corresponding to the operating state to the switch module and the charging protocol chip;

[0007] The switch module is used to receive the first control signal sent by the processing module, and to be turned on or off according to the control signal, wherein when the switch module is turned on, the voltage output by the main interface is output to the power supply end of the charging protocol chip through the switch module, and when the switch module is turned off, the voltage output by the main interface cannot be output to the power supply end of the charging protocol chip through the switch module;

[0008] The charging protocol chip is used to receive the second control signal sent by the processing module, and determine whether to output voltage to the expansion interface according to the second control signal.

[0009] Optionally, the docking station status detection module includes a temperature detection unit, and an output end of the temperature detection unit is connected to an input end of the processing module; wherein:

[0010] The temperature detection unit is used to detect the temperature of the expansion dock, obtain a temperature detection signal, and send the temperature detection signal as the detection signal to the processing module.

[0011] Optionally, there are multiple temperature detection units, and the multiple temperature detection units include a first temperature detection unit and a second temperature detection unit; wherein:

[0012] The first temperature detection unit is used to detect the interface temperature of the main interface, obtain a first temperature detection signal, and send the first temperature detection signal to the processing module;

[0013] The second temperature detection unit is used to detect the shell temperature of the expansion dock, obtain a second temperature detection signal, and send the second temperature detection signal to the processing module;

[0014] The processing module is used to determine a first control signal according to the first temperature detection signal, and send the first control signal to the charging protocol chip and the switch module; determine a second control signal according to the second temperature detection signal, and send the second control signal to the charging protocol chip.

[0015] Optionally, the temperature detection unit includes a first resistor and a temperature-sensitive resistor; wherein:

[0016] The first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the input end of the processing module, and the second end of the first resistor is also grounded through the temperature-sensitive resistor.

[0017] Optionally, the docking station state detection module includes a current detection unit, a detection end of the current detection unit is connected to a connection line between the switch module and the charging protocol chip, and an output end of the current detection unit is connected to an input end of the processing module; wherein:

[0018] The current detection unit is used to detect the current on the connection line between the switch module and the charging protocol chip to obtain a current detection signal, and send the current detection signal as the detection signal to the processing module.

[0019] Optionally, the current detection unit includes a second resistor and an operational amplifier; wherein:

[0020] The second resistor is connected in series on the connection line between the switch module and the charging protocol chip, the non-inverting input terminal of the operational amplifier is connected to the first end of the second resistor, the inverting input terminal of the operational amplifier is connected to the second end of the second resistor, and the output terminal of the operational amplifier is connected to the input terminal of the processing module.

[0021] Optionally, the switch module includes a first switch tube, a second switch tube, a third switch tube, a third resistor, and a fourth resistor; wherein:

[0022] The drain of the first switch tube is connected to the main interface, the source of the first switch tube is connected to the source of the second switch tube, and the drain of the second switch tube is connected to the power supply terminal of the charging protocol chip; the gate of the first switch tube is grounded through the third resistor, and the gate of the second switch tube is grounded through the third resistor;

[0023] The gate of the third switch tube is connected to the first output end of the processing module, the gate of the third switch tube is also grounded through the fourth resistor, the drain of the third switch tube is connected to the main interface, and the source of the third switch tube is grounded through the third resistor.

[0024] Optionally, the first switch tube is a PMOS, the second switch tube is a PMOS, and the third switch tube is an NMOS.

[0025] In addition, to achieve the above-mentioned purpose, the present invention further provides a docking station, which includes a main interface, an expansion interface and the docking station management circuit as described above.

[0026] Optionally, the docking station further includes a shell, and the docking station management circuit is disposed in the shell; the docking station management circuit includes a temperature detection module, and the temperature detection module includes a first temperature detection unit and a second temperature detection unit; wherein:

[0027] The temperature-sensitive resistor in the first temperature detection unit is arranged in contact with the main interface, and the temperature-sensitive resistor in the second temperature detection unit is arranged in contact with the shell.

[0028] The present invention proposes an expansion dock management circuit and an expansion dock, wherein the expansion dock management circuit is connected to a main interface and an expansion interface respectively; the expansion dock management circuit comprises an expansion dock status detection module, a switch module, a charging protocol chip and a processing module; the main interface is connected to the power supply end of the charging protocol chip through the switch module, and the power supply end of the charging protocol chip is connected to the expansion interface; the output end of the expansion dock status detection module is connected to the input end of the processing module, the first output end of the processing module is connected to the control end of the switch module, and the second output end of the processing module is connected to the control end of the charging protocol chip; wherein: the expansion dock status detection module is used to detect the operating status of the expansion dock, obtain a detection signal, and send the detection signal to the processing module; the processing The module is used to receive the detection signal sent by the docking station state detection module, determine the operating state of the docking station according to the detection signal, and send a control signal corresponding to the operating state to the switch module and the charging protocol chip; the switch module is used to receive the first control signal sent by the processing module, and turn on or off according to the control signal, wherein when the switch module is turned on, the voltage output by the main interface is output to the power supply end of the charging protocol chip through the switch module, and when the switch module is turned off, the voltage output by the main interface cannot be output to the power supply end of the charging protocol chip through the switch module; the charging protocol chip is used to receive the second control signal sent by the processing module, and determine whether to output voltage to the expansion interface according to the second control signal. The operating state of the docking station is detected by setting the docking station state detection module, and the processing module controls the switch module and the charging protocol chip according to the operating state, so that when an abnormal situation occurs in the docking station, the voltage input path and output path can be cut off in time through the switch module and the charging protocol chip, thereby avoiding damage to the docking station or the expansion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A functional module diagram of an embodiment of a docking station management circuit of the present invention;

[0031] Figure 2 This is a circuit structure diagram of the docking station management circuit of the present invention.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0033] Description of Figure Numbers:

[0034] Label name Label name 110 Docking station status detection module R1~R4 The first resistor to the fourth resistor 111 The first temperature detection unit Q1~Q3 The first switch tube to the third switch tube 112 Second temperature detection unit NTC Thermistor 113 Current sensing unit S1 Operational Amplifier 120 Switch module Z1 The first voltage regulator 130 Charging protocol chip C1 First capacitor 140 Processing Module 220 Extension interface 210 Main interface DETAILED DESCRIPTION

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides a docking station management circuit, which is applied to the docking station, see Figure 1 , Figure 1This is a functional module diagram of an embodiment of the expansion dock management circuit of the present invention. In this embodiment, the expansion dock management circuit is connected to the main interface 210 and the expansion interface 220 respectively; the expansion dock management circuit includes an expansion dock state detection module 110, a switch module 120, a charging protocol chip 130 and a processing module 140; the main interface 210 is connected to the power supply end of the charging protocol chip 130 through the switch module 120, and the power supply end of the charging protocol chip 130 is connected to the expansion interface 220; the output end of the expansion dock state detection module 110 is connected to the input end of the processing module 140, the first output end of the processing module 140 is connected to the control end of the switch module 120, and the second output end of the processing module 140 is connected to the control end of the charging protocol chip 130; wherein:

[0040] The docking station state detection module 110 is used to detect the operation state of the docking station, obtain a detection signal, and send the detection signal to the processing module 140;

[0041] The processing module 140 is used to receive the detection signal sent by the docking station state detection module 110, determine the operating state of the docking station according to the detection signal, and send a control signal corresponding to the operating state to the switch module 120 and the charging protocol chip 130;

[0042] The switch module 120 is used to receive the first control signal sent by the processing module 140, and to be turned on or off according to the control signal, wherein when the switch module 120 is turned on, the voltage output by the main interface 210 is output to the power supply end of the charging protocol chip 130 through the switch module 120, and when the switch module 120 is turned off, the voltage output by the main interface 210 cannot be output to the power supply end of the charging protocol chip 130 through the switch module 120;

[0043] The charging protocol chip 130 is used to receive the second control signal sent by the processing module 140 and determine whether to output voltage to the expansion interface 220 according to the second control signal.

[0044] The expansion dock is used to realize interface expansion; generally, the expansion dock includes a main interface 210 and several expansion interfaces 220; the main interface 210 is used to connect to the interface of the expansion device, and the expansion device is a device that needs to perform interface expansion, such as a computer as an expansion device that performs interface expansion through the expansion dock. At this time, the interface on the computer is connected to the main interface 210 of the expansion dock; the expansion interface 220 is used as an expansion interface for devices that need to be connected to the expansion device; the specific types of the main interface 210 and the expansion interface 220 can be set based on actual needs. For example, the main interface 210 is a Type-C interface, and the expansion interface 220 includes a Type-C interface, a USB-A interface, and a DP interface.

[0045] The docking station status detection module 110 detects the operating status of the docking station; the operating status of the docking station includes but is not limited to temperature, current, voltage, and device status; it is understandable that corresponding devices can be set for detection for different types of operating status.

[0046] The processing module 140 obtains the operating status detected by the docking station status detection module 110, thereby determining whether the docking station is abnormal, and then controlling the switch module 120 and the charging protocol chip 130. The specific type of the processing module 140 can be set based on actual needs, such as MCU.

[0047] It can be understood that when the operating state of the expansion dock is normal, the switch module 120 is turned on and normally supplies power to the charging protocol chip 130. At the same time, the charging protocol chip 130 also normally supplies power to the expansion interface 220; when the operating state of the expansion dock is abnormal, in order to avoid the deepening of the abnormality of the operating state of the expansion dock and to avoid affecting the expansion dock and the expansion device, the switch module 120 can be disconnected to stop supplying power to the charging protocol chip 130, and the charging protocol chip 130 stops supplying power to the expansion interface 220.

[0048] It should be noted that the charging protocol chip 130 is used to realize the power control of the expansion dock. Therefore, the power end of the charging protocol chip 130 is specifically connected to the power pin in the main interface 210 through the switch module 120. At the same time, the output end of the charging protocol chip 130 is connected to the power pin in each expansion interface 220. The specific type of the charging protocol chip 130 can be set based on actual needs, such as a PD chip.

[0049] Specifically, after determining the operating status of the expansion dock, determine the control signal corresponding to the operating status; the control signal includes a first control signal for the switch module 120 and a second control signal for the charging protocol chip 130; after the switch module 120 and the charging protocol chip 130 receive the corresponding control signal, they set their own status to the status corresponding to the control signal.

[0050] In this embodiment, the expansion dock status detection module 110 is set to detect the operating status of the expansion dock. At the same time, the processing module 140 controls the switch module 120 and the charging protocol chip 130 according to the operating status, so that when an abnormal situation occurs in the expansion dock, the input path and the output path of the voltage can be cut off in time through the switch module 120 and the charging protocol chip 130, thereby preventing the expansion dock or the expansion device from being damaged.

[0051] Further, see Figure 2 , the docking station status detection module 110 includes a temperature detection unit, the output end of the temperature detection unit is connected to the input end of the processing module 140; wherein:

[0052] The temperature detection unit is used to detect the temperature of the docking station to obtain a temperature detection signal, and send the temperature detection signal as the detection signal to the processing module 140 .

[0053] In this embodiment, the temperature of the expansion dock is detected; it is understandable that heat is generated when the expansion dock is in operation; when the temperature of the expansion dock is within a certain range, the temperature of the expansion dock is considered normal, and when the temperature of the expansion dock is too high, there may be a risk of burning. Therefore, in this embodiment, a temperature detection unit is provided to detect the temperature of the expansion dock, and the processing module 140 determines the operating status of the expansion dock through the temperature.

[0054] Furthermore, there are multiple temperature detection units, and the multiple temperature detection units include a first temperature detection unit 111 and a second temperature detection unit 112; wherein:

[0055] The first temperature detection unit 111 is used to detect the interface temperature of the main interface 210, obtain a first temperature detection signal, and send the first temperature detection signal to the processing module 140;

[0056] The second temperature detection unit 112 is used to detect the shell temperature of the docking station, obtain a second temperature detection signal, and send the second temperature detection signal to the processing module 140;

[0057] The processing module 140 is used to determine a first control signal according to the first temperature detection signal, and send the first control signal to the charging protocol chip 130 and the switch module 120; determine a second control signal according to the second temperature detection signal, and send the second control signal to the charging protocol chip 130.

[0058] In this embodiment, a temperature detection unit is specifically configured to detect the interface temperature of the main interface 210 and the shell temperature of the expansion dock; it can be understood that the expansion dock is connected to the expansion device through the main interface 210. When there is an abnormality between the expansion dock and the expansion device, it will be reflected in the temperature of the main interface 210, such as overcurrent, short circuit, etc.; and when the temperature of the main interface 210 is too high, in order to avoid damage to the expansion dock and the expansion device, the operation of the expansion dock is stopped. Therefore, the state of the charging protocol chip 130 and the switch module 120 is controlled based on the first temperature detection signal; specifically, when the temperature indicated by the first temperature detection signal is less than the preset first temperature, the charging protocol chip 130 and the switch module 120 are controlled to be turned on to power the charging protocol chip 130, and the charging protocol chip 130 powers each expansion interface 220. When the temperature indicated by the first temperature detection signal is greater than or equal to the first temperature, the charging protocol chip 130 and the switch module 120 are controlled to be turned off to stop powering the charging protocol chip 130, and the charging protocol chip 130 stops powering each expansion interface 220.

[0059] The shell temperature of the expansion dock indicates the operating load of the expansion dock. When the load is too large, the shell temperature of the expansion dock is relatively high. Therefore, in this embodiment, the shell temperature of the expansion dock is detected. It can be understood that a relatively high shell temperature of the expansion dock indicates that the temperature of the components inside the expansion dock is relatively high, such as the charging protocol chip 130, but it will not affect the expansion devices too much. Therefore, when the shell temperature of the expansion dock is relatively high, only the state of the charging protocol chip 130 can be controlled. Specifically, when the temperature indicated by the second temperature detection signal is lower than the preset second temperature, the charging protocol chip 130 is controlled to be turned on so that the charging protocol chip 130 supplies power to each expansion interface 220. When the temperature indicated by the second temperature detection signal is greater than or equal to the second temperature, the charging protocol chip 130 is controlled to be turned off so that the charging protocol chip 130 stops supplying power to each expansion interface 220.

[0060] It can be understood that, in actual configuration, the detection end of the first temperature detection unit 111 is in contact with the main interface 210 , and the detection end of the second temperature detection unit 112 is in contact with the shell of the docking station.

[0061] Furthermore, the temperature detection unit includes a first resistor R1 and a temperature sensitive resistor NTC; wherein:

[0062] A first end of the first resistor R1 is connected to a power supply, a second end of the first resistor R1 is connected to an input end of the processing module 140 , and a second end of the first resistor R1 is grounded through the temperature sensitive resistor NTC.

[0063] The first resistor R1 and the thermistor NTC form a voltage divider circuit; the resistance of the thermistor NTC changes with the temperature of the environment in which it is located, so the voltage at the input end of the processing module 140 also changes with the change of the thermistor NTC; therefore, the processing module 140 can determine the temperature of the environment in which the thermistor NTC is located based on the voltage at the input end; the specific type of the thermistor NTC can be set based on actual needs, such as a negative temperature coefficient resistor.

[0064] Understandably, Figure 2 In the embodiment, the first resistor R1 in the first temperature detection unit 111 is R1(1), and the temperature-sensitive resistor NTC is NTC(1); the first resistor R1 in the second temperature detection unit 112 is R1(2), and the temperature-sensitive resistor NTC is NTC(2).

[0065] Further, the docking station state detection module 110 includes a current detection unit 113, a detection end of the current detection unit 113 is connected to the connection line between the switch module 120 and the charging protocol chip 130, and an output end of the current detection unit 113 is connected to an input end of the processing module 140; wherein:

[0066] The current detection unit 113 is used to detect the current on the connection line between the switch module 120 and the charging protocol chip 130 to obtain a current detection signal, and send the current detection signal as the detection signal to the processing module 140.

[0067] In this embodiment, the current on the connection line between the switch module 120 and the charging protocol chip 130 is detected; it can be understood that the connection line between the switch module 120 and the charging protocol chip 130 is a voltage input line. When the current on the line is too large, it is easy to burn the components in the expansion dock and the expansion device. Therefore, in this embodiment, a current detection unit 113 is set to detect the current on the line, and the processing module 140 determines the operating status of the expansion dock through the current.

[0068] Specifically, a current threshold can be set. When the current value indicated by the detection signal is less than the current threshold, the current is considered normal. At this time, the charging protocol chip 130 and the switch module 120 are controlled to be turned on to power the charging protocol chip 130, and the charging protocol chip 130 powers each expansion interface 220. When the current value indicated by the detection signal is greater than or equal to the current threshold, the charging protocol chip 130 and the switch module 120 are controlled to be turned off to stop powering the charging protocol chip 130, and the charging protocol chip 130 stops powering each expansion interface 220.

[0069] Furthermore, the current detection unit 113 includes a second resistor R2 and an operational amplifier S1; wherein:

[0070] The second resistor R2 is connected in series on the connection line between the switch module 120 and the charging protocol chip 130, the non-inverting input end of the operational amplifier S1 is connected to the first end of the second resistor R2, the inverting input end of the operational amplifier S1 is connected to the second end of the second resistor R2, and the output end of the operational amplifier S1 is connected to the input end of the processing module 140.

[0071] The second resistor R2 is connected in series on the connection line between the switch module 120 and the charging protocol chip 130. Therefore, the current on the second resistor R2 is the current on the connection line between the switch module 120 and the charging protocol chip 130. The current detection signal can be obtained by detecting the current on the second resistor R2.

[0072] Specifically, an operational amplifier S1 is configured to detect the current on the second resistor R2 ; the specific configuration of the operational amplifier S1 can be configured based on actual needs, which will not be described in detail herein.

[0073] In other embodiments, other methods may be used to detect current, such as a current sensor, a current transformer, etc.

[0074] Furthermore, the switch module 120 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a third resistor R3, and a fourth resistor R4; wherein:

[0075] The drain of the first switch tube Q1 is connected to the main interface 210, the source of the first switch tube Q1 is connected to the source of the second switch tube Q2, and the drain of the second switch tube Q2 is connected to the power supply terminal of the charging protocol chip 130; the gate of the first switch tube Q1 is grounded through the third resistor R3, and the gate of the second switch tube Q2 is grounded through the third resistor R3;

[0076] The gate of the third switch tube Q3 is connected to the first output end of the processing module 140, and the gate of the third switch tube Q3 is also grounded through the fourth resistor R4. The drain of the third switch tube Q3 is connected to the main interface 210, and the source of the third switch tube Q3 is grounded through the third resistor R3.

[0077] In this embodiment, the control of line conduction is implemented by using switch tubes. Specifically, the first switch tube Q1 is a PMOS, the second switch tube Q2 is a PMOS, and the third switch tube Q3 is an NMOS.

[0078] When the processing module 140 outputs a low level, due to the pull-down effect of the fourth resistor R4, the gate of the third switch tube Q3 is pulled down, and the third switch tube Q3 is turned off; the gate of the first switch tube Q1 is grounded through the third resistor R3, the gate-source voltage of the first switch tube Q1 meets the threshold voltage, and the first switch tube Q1 is turned on; the gate of the second switch tube Q2 is grounded through the third resistor R3, the gate-source voltage of the second switch tube Q2 meets the threshold voltage, and the second switch tube Q2 is turned on; at this time, the voltage of the main interface 210 can reach the power supply end of the charging protocol chip 130 through the first switch tube Q1 and the second switch tube Q2 to power the charging protocol chip 130.

[0079] When the processing module 140 outputs a high level, the gate of the third switch tube Q3 is at a high level, and the third switch tube Q3 is turned on; the voltage of the main interface 210 reaches the gate of the first switch tube Q1 through the third switch tube Q3, the gate voltage of the first switch tube Q1 is greater than the source voltage, and the first switch tube Q1 is turned off; the voltage of the main interface 210 reaches the gate of the second switch tube Q2 through the third switch tube Q3, the gate voltage of the second switch tube Q2 is greater than the source voltage, and the second switch tube Q2 is turned off; at this time, the voltage of the main interface 210 can be transmitted through the body diode of the first switch tube Q1, but because the second switch tube Q2 is completely turned off, it cannot be transmitted to the power supply end of the charging protocol chip 130.

[0080] In addition to realizing active switching on and off, the switch module 120 in this embodiment can also realize the function of anti-reverse; specifically:

[0081] When the power supply is normally connected, the voltage pin of the main interface 210 provides a voltage signal, and the ground pin provides a ground signal. At this time, the state of the switch module 120 is the same as the state when the processing module 140 outputs a low level, and no further description is given;

[0082] When the power supply is reversed, the voltage pin of the main interface 210 provides a ground signal, and the ground pin provides a voltage signal; at this time, the voltage signal reaches the gate of the first switch tube Q1 and the gate of the second switch tube Q2 through the third resistor R3; the first switch tube Q1 and the second switch tube Q2 are both turned off, realizing the anti-reverse function.

[0083] A first capacitor C1 and a first voltage regulator tube Z1 may be further provided, wherein the cathode of the first voltage regulator tube Z1 is connected to the source of the first switch tube Q1, the anode of the first voltage regulator tube Z1 is grounded via a third resistor R3, and the first capacitor C1 is connected in parallel with the first voltage regulator tube Z1; this can prevent breakdown between the gate and the source of the switch tube; and when power is turned on, the first capacitor C1 is equivalent to a short circuit.

[0084] The overall implementation process of the present invention is described below:

[0085] The first temperature detection unit 111 detects the interface temperature of the main interface 210 to obtain a first temperature detection signal; the second temperature detection unit 112 detects the shell temperature of the docking station to obtain a second temperature detection signal; the current detection unit 113 detects the current on the connection line between the switch module 120 and the charging protocol chip 130 to obtain a current detection signal;

[0086] The temperature corresponding to the first temperature signal is lower than the preset first temperature, and the temperature corresponding to the second temperature signal is lower than the preset second temperature, and the current corresponding to the current detection signal is lower than the current threshold; the processing module 140 sends a low-level signal to the gate of the third switch tube Q3, the first switch tube Q1 and the second switch tube Q2 are turned on, and the voltage input by the main interface 210 is used to power the charging protocol chip 130; the processing module 140 sends a normal operation signal to the charging protocol chip 130, and the charging protocol chip 130 is used to power the expansion interface 220;

[0087] The temperature corresponding to the first temperature signal is greater than or equal to the preset first temperature; the processing module 140 sends a high-level signal to the gate of the third switch tube Q3, the first switch tube Q1 and the second switch tube Q2 are turned off, and the voltage input by the main interface 210 cannot power the charging protocol chip 130; the processing module 140 sends a stop power supply signal to the charging protocol chip 130, and the charging protocol chip 130 stops powering the expansion interface 220;

[0088] The temperature corresponding to the second temperature signal is greater than or equal to the preset second temperature; the processing module 140 sends a low-level signal to the gate of the third switch tube Q3, the first switch tube Q1 and the second switch tube Q2 are turned on, and the voltage input by the main interface 210 is used to power the charging protocol chip 130; the processing module 140 sends a stop power supply signal to the charging protocol chip 130, and the charging protocol chip 130 stops supplying power to the expansion interface 220;

[0089] The current corresponding to the current detection signal is greater than or equal to the current threshold; the processing module 140 sends a high-level signal to the gate of the third switch tube Q3, the first switch tube Q1 and the second switch tube Q2 are turned off, and the voltage input by the main interface 210 cannot power the charging protocol chip 130; the processing module 140 sends a stop power supply signal to the charging protocol chip 130, and the charging protocol chip 130 stops powering the expansion interface 220;

[0090] When the power supply is reversed, the voltage pin of the main interface 210 provides a ground signal, and the ground pin provides a voltage signal; at this time, the voltage signal reaches the gate of the first switch tube Q1 and the gate of the second switch tube Q2 through the third resistor R3; the first switch tube Q1 and the second switch tube Q2 are both turned off, realizing the anti-reverse function.

[0091] The present invention also protects a docking station, which includes a main interface 210, an expansion interface 220, and a docking station management circuit. The structure of the docking station management circuit can refer to the above embodiment and will not be repeated here. As a matter of course, since the docking station of this embodiment adopts the technical solution of the above docking station management circuit, the docking station has all the beneficial effects of the above docking station management circuit.

[0092] Furthermore, the docking station further comprises a shell, and the docking station management circuit is disposed in the shell; the docking station management circuit comprises a temperature detection module, and the temperature detection module comprises a first temperature detection unit 111 and a second temperature detection unit 112; wherein:

[0093] The NTC temperature-sensitive resistor in the first temperature detection unit 111 is disposed in contact with the main interface 210 , and the NTC temperature-sensitive resistor in the second temperature detection unit 112 is disposed in contact with the housing.

[0094] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "includes a..." does not exclude the presence of other identical elements in the process, method, article or system including the element. The serial numbers of the above-mentioned embodiments of the present invention are for description only and do not represent the advantages and disadvantages of the embodiments.

[0095] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A docking station management circuit, characterized in that: The expansion dock management circuit is connected to the main interface and the expansion interface respectively; the expansion dock management circuit includes an expansion dock state detection module, a switch module, a charging protocol chip and a processing module; the main interface is connected to the power supply end of the charging protocol chip through the switch module, and the power supply end of the charging protocol chip is connected to the expansion interface; the output end of the expansion dock state detection module is connected to the input end of the processing module, the first output end of the processing module is connected to the control end of the switch module, and the second output end of the processing module is connected to the control end of the charging protocol chip; wherein: The docking station state detection module is used to detect the operating state of the docking station, obtain a detection signal, and send the detection signal to the processing module; The processing module is used to receive the detection signal sent by the docking station state detection module, determine the operating state of the docking station according to the detection signal, and send a control signal corresponding to the operating state to the switch module and the charging protocol chip; The switch module is used to receive the first control signal sent by the processing module, and to be turned on or off according to the control signal, wherein when the switch module is turned on, the voltage output by the main interface is output to the power supply end of the charging protocol chip through the switch module, and when the switch module is turned off, the voltage output by the main interface cannot be output to the power supply end of the charging protocol chip through the switch module; The charging protocol chip is used to receive the second control signal sent by the processing module, and determine whether to output voltage to the expansion interface according to the second control signal.

2. The docking station management circuit according to claim 1, characterized in that: The docking station status detection module includes a temperature detection unit, and the output end of the temperature detection unit is connected to the input end of the processing module; wherein: The temperature detection unit is used to detect the temperature of the expansion dock, obtain a temperature detection signal, and send the temperature detection signal as the detection signal to the processing module.

3. The docking station management circuit according to claim 2, wherein: The number of the temperature detection units is multiple, and the multiple temperature detection units include a first temperature detection unit and a second temperature detection unit; wherein: The first temperature detection unit is used to detect the interface temperature of the main interface, obtain a first temperature detection signal, and send the first temperature detection signal to the processing module; The second temperature detection unit is used to detect the shell temperature of the expansion dock, obtain a second temperature detection signal, and send the second temperature detection signal to the processing module; The processing module is used to determine a first control signal according to the first temperature detection signal, and send the first control signal to the charging protocol chip and the switch module; determine a second control signal according to the second temperature detection signal, and send the second control signal to the charging protocol chip.

4. The expansion dock management circuit according to claim 2 or 3, characterized in that: The temperature detection unit includes a first resistor and a temperature-sensitive resistor; wherein: The first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the input end of the processing module, and the second end of the first resistor is also grounded through the temperature-sensitive resistor.

5. The docking station management circuit according to claim 1, wherein: The docking station state detection module includes a current detection unit, a detection end of the current detection unit is connected to the connection line between the switch module and the charging protocol chip, and an output end of the current detection unit is connected to an input end of the processing module; wherein: The current detection unit is used to detect the current on the connection line between the switch module and the charging protocol chip to obtain a current detection signal, and send the current detection signal as the detection signal to the processing module.

6. The docking station management circuit according to claim 5, characterized in that: The current detection unit includes a second resistor and an operational amplifier; wherein: The second resistor is connected in series on the connection line between the switch module and the charging protocol chip, the non-inverting input terminal of the operational amplifier is connected to the first end of the second resistor, the inverting input terminal of the operational amplifier is connected to the second end of the second resistor, and the output terminal of the operational amplifier is connected to the input terminal of the processing module.

7. The docking station management circuit according to claim 1, characterized in that: The switch module includes a first switch tube, a second switch tube, a third switch tube, a third resistor, and a fourth resistor; wherein: The drain of the first switch tube is connected to the main interface, the source of the first switch tube is connected to the source of the second switch tube, and the drain of the second switch tube is connected to the power supply terminal of the charging protocol chip; the gate of the first switch tube is grounded through the third resistor, and the gate of the second switch tube is grounded through the third resistor; The gate of the third switch tube is connected to the first output end of the processing module, the gate of the third switch tube is also grounded through the fourth resistor, the drain of the third switch tube is connected to the main interface, and the source of the third switch tube is grounded through the third resistor.

8. The docking station management circuit according to claim 7, wherein: The first switch tube is a PMOS, the second switch tube is a PMOS, and the third switch tube is an NMOS.

9. A docking station, characterized in that: The expansion dock comprises a main interface, an expansion interface and a expansion dock management circuit according to any one of claims 1 to 8.

10. The expansion dock as claimed in claim 9, characterized in that: The docking station further comprises a housing, and the docking station management circuit is disposed in the housing; the docking station management circuit comprises a temperature detection module, and the temperature detection module comprises a first temperature detection unit and a second temperature detection unit; wherein: The temperature-sensitive resistor in the first temperature detection unit is arranged in contact with the main interface, and the temperature-sensitive resistor in the second temperature detection unit is arranged in contact with the shell.

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