Power supply device of docking station and docking station

Abstract

The utility model provides a power supply device of a docking station and the docking station, and the power supply device of the docking station comprises a power supply switching circuit, a power supply direct connection circuit and a protocol chip. The protocol chip is respectively connected with external host equipment and an adapter and is used for detecting power supply voltages of the host equipment and the adapter; the power supply switching circuit is respectively connected with the protocol chip, the host equipment, the adapter and the docking station, and is used for determining to be conducted with the host equipment or the adapter according to the magnitude of the power supply voltage so as to enable the docking station to be powered; the power supply direct connection circuit is connected with the host device and the docking station and used for directly transmitting electric energy of the host device to the docking station, and rapid power-on of the docking station is achieved. According to the power supply device provided by the utility model, the docking station can receive power supplied by the host equipment and the adapter, the docking station can be quickly powered on through the power supply direct connection circuit, the power-on time is shortened, the voltage drop is reduced, and the docking station can still work normally when the power supply voltage of the host equipment is relatively low.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply device technical field, concretely relates to a power supply device and expansion dock of expansion dock. BACKGROUND

[0002] Expansion dock is a kind of device for providing additional interface for host device (for example, computer, mobile phone, tablet), and the interface type provided by expansion dock is rich, including but not limited to USB interface, audio and video interface etc. Expansion dock is generally connected with host device when using, so the current common power supply mode of expansion dock mainly includes adapter power supply and host device power supply, when expansion dock is not connected with adapter, host device will be as power supply terminal to power supply for the whole system of expansion dock.

[0003] But the existing expansion dock, due to the lack of relevant structure design of power supply device, when encountering the condition of low voltage of host device or poor output power load capacity, it is very easy to appear the problem of slow power-on, and even the input voltage is not enough to cause the abnormal work of power supply chip, so as to not output voltage for the whole system of device, leading to the device cannot be used normally.

[0004] Based on this, the utility model hopes to provide a kind of scheme to solve at least one of the above problems. UTILITY MODEL CONTENT

[0005] In order to overcome the defects existing in the prior art, the utility model provides a kind of power supply device and expansion dock of expansion dock, wherein the power supply device of expansion dock is directly connected with host device and expansion dock by power supply direct connection circuit, so that the electric energy of host device can be directly input to expansion dock through power supply direct connection circuit, the number of components is reduced, the voltage drop is reduced, the stable work of expansion dock is guaranteed, and the expansion dock can realize fast power-on, the power-on time is shortened, and the use experience is better. The specific technical scheme is as follows:

[0006] The first aspect of the utility model provides a kind of power supply device of expansion dock, for making host device and adapter power supply for expansion dock, including: power supply switching circuit, power supply direct connection circuit and protocol chip;

[0007] The protocol chip is connected with the host device and the adapter respectively, for detecting the power supply voltage of the host device and the adapter;

[0008] The power supply switching circuit is connected with the protocol chip, the host device, the adapter and the expansion dock respectively, to determine the conduction with the host device or the adapter according to the size of the power supply voltage, and then make the expansion dock receive electricity;

[0009] The power supply direct connection circuit is connected with the host device and the docking station respectively, and is used for directly transmitting power of the host device to the docking station to realize fast power-on of the docking station.

[0010] In one embodiment, the power supply direct connection circuit comprises a diode.

[0011] The diode is connected with the host device and the docking station respectively.

[0012] It can be understood that the power supply direct connection circuit comprises a diode, and the diode is used as a switch between the host device and the docking station, which has the advantages of simple structure and high efficiency, and can realize fast power-on of the docking station.

[0013] In one embodiment, the diode comprises a Schottky diode.

[0014] The Schottky diode can realize efficient conversion based on its fast switching characteristic, so as to reduce voltage loss.

[0015] In one embodiment, the power supply switching circuit comprises a first transistor and a second transistor.

[0016] The first transistor is connected with the host device and the docking station respectively, and is used for realizing on-off between the host device and the docking station; the second transistor is connected with the adapter and the docking station respectively, and is used for realizing on-off between the adapter and the docking station.

[0017] The power supply switching circuit realizes communication with the host device or communication with the adapter through on-off of the first transistor and the second transistor, so that the docking station can flexibly accept power supply of the host device and the adapter.

[0018] In one embodiment, the power supply switching circuit further comprises a third transistor and a fourth transistor.

[0019] The third transistor is connected with the first transistor and the protocol chip respectively, and is used for driving the first transistor to turn on or off; the fourth transistor is connected with the second transistor and the protocol chip respectively, and is used for driving the second transistor to turn on or off.

[0020] In one embodiment, the first transistor, the second transistor, the third transistor and the fourth transistor all comprise MOS tubes; a gate of the first transistor is connected with a drain of the third transistor, and a gate of the second transistor is connected with a drain of the fourth transistor.

[0021] In one specific embodiment, a power supply detection circuit is further included, which is connected to the host device, the adapter and the protocol chip respectively; the protocol chip detects the power supply voltage of the host device and the adapter through the power supply detection circuit.

[0022] In one specific embodiment, the power supply detection circuit includes a first voltage dividing resistor connected to the host device and a second voltage dividing resistor connected to the adapter; the protocol chip is configured to detect the voltage divided by the first voltage dividing resistor and the second voltage dividing resistor to obtain the power supply voltage.

[0023] In one specific embodiment, the protocol chip includes a PD protocol chip.

[0024] In the second aspect of the utility model, a docking station is provided, which comprises the power supply device of the docking station described in any of the above embodiments, and a docking station body.

[0025] The docking station body comprises a power supply module, which is connected to the power supply switching circuit and the power supply direct connection circuit respectively.

[0026] The utility model has at least the following beneficial effects:

[0027] The power supply device of the docking station and the docking station provided by the utility model have the following advantages: when the power supply device of the docking station is applied to the docking station, the docking station can accept power supply from the host device and the adapter, has good flexibility, and can realize fast power-on through the power supply direct connection circuit, so that the power-on time is shortened, the voltage drop degree of the power supply voltage is reduced, and the docking station can still work normally when the power supply voltage of the host device is low, thus having good stability. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is a structure connection schematic diagram of the power supply device of the docking station in actual work.

[0030] Figure 2 It is a circuit schematic diagram of the power supply device of the docking station.

[0031] Figure 3A circuit diagram of a power supply detection circuit;

[0032] Figure 4 A circuit diagram of a power module of a docking station.

[0033] Reference numerals:

[0034] 1 - power supply switching circuit; 2 - power supply direct connection circuit; 3 - protocol chip; 4 - host device; 5 - adapter; 6 - docking station. DETAILED DESCRIPTION

[0035] Hereinafter, various embodiments of the present application will be described more fully. The present application may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0036] Hereinafter, the term "include" or "may include" used in various embodiments of the present application indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present application, the terms "include", "have", and their conjugates merely indicate the presence of specific features, numbers, steps, operations, elements, components, or combinations thereof, and should not be construed as excluding the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0037] In various embodiments of the present application, the expression "or" or "at least one of A or / and B" includes any combination of the listed terms or all combinations thereof. For example, the expression "A or B" or "at least one of A or / and B" can include A, can include B, or can include both A and B.

[0038] The expressions (such as "first", "second", etc.) used in various embodiments of the present application can modify various constituent elements in various embodiments, but can not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are used only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, the first element can be referred to as the second element, and likewise, the second element can be referred to as the first element, without departing from the scope of various embodiments of the present application.

[0039] It should be noted that in the utility model, unless otherwise specified and defined, the terms such as ''installation'', ''connection'', ''fixation'' should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium, it can be internal communication of two elements, for those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] The existing docking station lacks relevant structural design for responding to insufficient input voltage, and when the host device voltage is low or the output power load capacity is poor, the power-on problem is prone to occur, and even the input voltage is insufficient, the power supply chip works abnormally, so that the entire system of the device cannot output voltage, and the device cannot be used normally. Therefore, the utility model is intended to provide a power supply device of docking station and docking station to solve the problems existing in the prior art. The scheme provided by the utility model will be specifically introduced below.

[0041] Please refer to Figure 1 The utility model provides a kind of power supply device of docking station, for host device 4 and adapter 5 are powered for docking station 6, which comprises: power supply switching circuit 1, power supply direct connection circuit 2 and protocol chip 3.

[0042] Specifically, protocol chip 3 is connected to host device 4 and adapter 5 respectively, for detecting the power supply voltage of host device 4 and adapter 5.Power supply switching circuit 1 is connected to protocol chip 3, host device 4, adapter 5 and docking station 6 respectively, to determine the conduction with host device 4 or adapter 5 according to the size of the power supply voltage, and then make docking station 6 receive electricity.Power supply direct connection circuit 2 is connected to host device 4 and docking station 6 respectively, for transmitting the electric energy of host device 4 to docking station 6 directly, to realize the fast power-on of docking station 6.

[0043] In practical application, when docking station 6 is not connected to adapter 5 but connected to host device 4, protocol chip 3 detects that there is no power supply voltage at the adapter end, while the host device end has power supply voltage, and then sends a first control signal to power supply switching circuit 1, and power supply switching circuit 1 switches to conduction with host device 4 based on the first control signal, and at this time, host device 4 supplies power to docking station 6.When docking station 6 is connected to adapter 5, protocol chip 3 detects that adapter 5 has power supply voltage, and then sends a second control signal to power supply switching circuit 1, and power supply switching circuit 1 switches to conduction with adapter 5 based on the second control signal, and the host device 4 end switches from power supply end to receiving end, and adapter 5 supplies power to docking station 6 and host device 4 as power supply end.

[0044] When the host device 4 is a power supply end and the voltage of the host device 4 is low or the output power load capacity of the host device 4 is poor, the power of the host device 4 can be directly transmitted to the docking station 6 through the power supply direct connection circuit 2, so that the power does not need to be transmitted through the power supply switching circuit 1, the rapid power-on of the docking station 6 is realized, the voltage drop degree of the power supply voltage is reduced, and the stable work of the docking station 6 under the condition of low power supply voltage is ensured.

[0045] In the utility model, the host device 4 includes but is not limited to computer, mobile phone, tablet computer and the like.

[0046] In one embodiment, the power supply direct connection circuit 2 can include a diode connected to the host device 4 and the docking station 6, thereby serving as a switch between the host device 4 and the docking station 6. Thus, the power supply direct connection circuit 2 has the advantages of simple structure and efficient transmission, can realize the rapid power-on of the docking station 6, and can reduce the number of components in the power transmission process and the degree of reduction of the power supply voltage affected by the internal resistance of the components.

[0047] Please refer to Figure 2 The diode can include a Schottky diode D24, the host device end is VBUS in the figure, and the power of the host device end VBUS can be directly transmitted to VBUS_M through the Schottky diode D24 and then input to the docking station. Based on the fast switching characteristic of the Schottky diode D24, efficient conversion can be realized to reduce the loss of voltage.

[0048] In other embodiments, the diode can also be a general rectifier diode, which is not specifically limited.

[0049] In one embodiment, please refer to Figure 2 The power supply switching circuit 1 can include a first transistor Q2 and a second transistor Q3. Specifically, the first transistor Q2 is connected to the host device 4 and the docking station 6, i.e. connected to VBUS and VBUS_M in the figure, respectively, and the first transistor Q2 is used to realize the on-off between the host device 4 and the docking station 6 by its own on-off. The second transistor Q3 is connected to the adapter 5 and the docking station 6, i.e. connected to 5V-20V and VBUS_M in the figure, respectively, and the second transistor Q3 is used to realize the on-off between the adapter 5 and the docking station 6 by its own on-off.

[0050] Further, the power supply switching circuit 1 can also include a third transistor Q9 and a fourth transistor Q7. Specifically, the third transistor Q9 is connected to the first transistor Q2 and the protocol chip 3, respectively, for driving the first transistor Q2 to on-off. The fourth transistor Q7 is connected to the second transistor Q3 and the protocol chip 3, respectively, for driving the second transistor Q3 to on-off.

[0051] Exemplarily, the first transistor Q2, the second transistor Q3, the third transistor Q9 and the fourth transistor Q7 can each comprise a MOS transistor. In this case, the gate of the first transistor Q2 is connected to the drain of the third transistor Q9, and the gate of the second transistor Q3 is connected to the drain of the fourth transistor Q7.

[0052] Specifically, in actual operation, when the adapter 5 is not connected, the host device 4 provides a power supply voltage. The protocol chip 3 detects that the adapter 5 is not connected, and outputs a control signal G3_P2-SW at a low level, so that the fourth transistor Q7 is turned on, thereby causing the gate of the second transistor Q3 to be at a high level, so that the second transistor Q3 is not turned on, and the power transmitted by the host device 4 cannot flow back to the adapter 5. At the same time, the protocol chip 3 also outputs a control signal G1_P1-SW at a high level, causing the third transistor Q9 to be turned on, thereby pulling down the gate of the first transistor Q2 to a low level, so that the first transistor Q2 is turned on, and the power of the host device 4 can be transmitted to the docking station 6, i.e. from VBUS to VBUS_M. When the adapter 5 is used as a power supply end, the opposite is true, which will not be described in detail here.

[0053] Optionally, the voltage of the host device end and the adapter end can be 5V, 9V, 12V, 15V or 20V.

[0054] In other embodiments, the first transistor Q2, the second transistor Q3, the third transistor Q9 and the fourth transistor Q7 can also be bipolar transistors, which are not specifically limited.

[0055] In one specific embodiment, a power supply detection circuit is further included, which is connected to the host device 4, the adapter 5 and the protocol chip 3 respectively. The protocol chip 3 detects the power supply voltage of the host device 4 and the adapter 5 through the power supply detection circuit.

[0056] Specifically, please refer to Figure 3 The power supply detection circuit can include a first voltage dividing resistor connected to the host device 4 (VBUS in the figure) and a second voltage dividing resistor connected to the adapter 5 (5V-20V in the figure), and the protocol chip 3 is configured to detect the voltage after voltage division by the first voltage dividing resistor and the second voltage dividing resistor to obtain the power supply voltage. It should be noted that "obtaining the power supply voltage" does not mean obtaining the exact power supply voltage, but reflecting the power supply voltage through the voltage after voltage division.

[0057] Exemplarily, the first voltage dividing resistor can include resistors R10 and R15 shown in the figure, the resistance of the resistor R10 is exemplarily 9.09KΩ, and the resistance of the resistor R15 is exemplarily 1KΩ. The second voltage dividing resistor can include resistors R44 and R45 shown in the figure, the resistance of the resistor R44 is exemplarily 9.09KΩ, and the resistance of the resistor R45 is exemplarily 1KΩ. The protocol chip 3 has two detection points, VBUS_DET1 and VBUS_DET2, wherein VBUS_DET1 is used for detecting the host device end, and VBUS_DET2 is used for detecting the adapter end.

[0058] When the adapter 5 is not connected, the network voltage at the adapter end is 0V, and the host device 5V is powered at this time, so that VBUS_DET1=5V*(R15 / R0+R15)=5V*(1 / 9.09+1)=0.5V, and VBUS_DET2=0V*(R45 / R44+R45)=20V*(1 / 9.09+1)=0V. Thus, the protocol chip 3 identifies that only the host device 4 is connected, and outputs a control signal G3_P2-SW at a low level and G1_P1-SW at a high level, so that the first transistor Q2 is turned on, the second transistor Q3 is not turned on, and the power of the host device 4 can be transmitted to the docking station 6. When the adapter 5 is connected, the host device 4 is converted into a powered end, and the voltage values detected by VBUS_DET1 and VBUS_DET2 change, so that the protocol chip 3 outputs a control signal opposite to the above, so that the first transistor Q2 is not turned on, the second transistor Q3 is turned on, and the power of the adapter 5 can be transmitted to the docking station 6.

[0059] Exemplarily, the protocol chip 3 can include a PD protocol chip, and the adapter 5 corresponds to a PD adapter. In other embodiments, the protocol chip 3 can be other types of chips, which are not limited.

[0060] The utility model also proposes a kind of docking station, including the power supply device of the docking station of any one embodiment described above, and docking station body.

[0061] The docking station body includes power module, and power module is connected power supply switching circuit 1 and power supply direct connection circuit 2 respectively. Exemplarily, please combine Figure 2 and Figure 4 , wherein Figure 4 It is the circuit schematic diagram of power module. Specifically, when Schottky diode D24 is added, the first transistor Q2 can be turned on without outputting control signal G1_P1-SW by protocol chip 3 when the host device end VBUS is powered, and the power VBUS_M can be directly outputted through Schottky diode D24 without passing through the first transistor Q2, at this time, the voltage drop is only about 0.1V, and the power-on time of VBUS_M supply can also be shortened, so thatFigure 3 The U20 power supply chip in the circuit inputs normally, and can normally output power supply to the whole system, and the protocol chip 3 normally works under power supply, and can normally control the on-off of the third transistor Q9 and the fourth transistor Q7, and further control the on-off of the first transistor Q2 and the second transistor Q3, and ensure the stable work of the power supply switching circuit 1 and the whole device.

[0062] In summary, the power supply device of the docking station and the docking station have the advantages that when the power supply device of the docking station is applied to the docking station, the docking station can receive power supply from the host device and the adapter, has good flexibility, and can realize fast power-on through the power supply direct connection circuit, shorten the power-on time, reduce the voltage drop degree of the power supply voltage, and enable the docking station to work normally when the power supply voltage of the host device is low, and has good stability.

[0063] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily necessary for implementing the utility model.

[0064] Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be changed and located in one or more devices different from the implementation scenario. The modules of the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0065] The above utility model serial number is only for description, and does not represent the advantages and disadvantages of the implementation scenario.

[0066] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A power supply device for a docking station, characterized by A power supply device for a docking station, comprising: a power supply switching circuit, a power supply direct connection circuit and a protocol chip; The protocol chip is connected to the host device and the adapter respectively, and is used for detecting the power supply voltage of the host device and the adapter; The power supply switching circuit is connected to the protocol chip, the host device, the adapter and the docking station respectively, and is used for determining the conduction of the host device or the adapter according to the size of the power supply voltage, so as to make the docking station powered; The power supply direct connection circuit is connected to the host device and the docking station respectively, and is used for directly transmitting the power of the host device to the docking station to realize the rapid power-on of the docking station.

2. The power supply device of the docking station according to claim 1, wherein The power supply direct connection circuit comprises a diode; The diode is connected to the host device and the docking station respectively.

3. The power supply device of a docking station according to claim 2, wherein, The diode comprises a Schottky diode.

4. The power supply device of the docking station according to claim 1, wherein The power supply switching circuit comprises a first transistor and a second transistor; The first transistor is connected to the host device and the docking station respectively, and is used for realizing the on-off between the host device and the docking station; The second transistor is connected to the adapter and the docking station respectively, and is used for realizing the on-off between the adapter and the docking station.

5. The power supply device of a docking station according to claim 4, wherein, The power supply switching circuit further comprises a third transistor and a fourth transistor; The third transistor is connected to the first transistor and the protocol chip respectively, and is used for driving the first transistor to turn on and off; the fourth transistor is connected to the second transistor and the protocol chip respectively, and is used for driving the second transistor to turn on and off.

6. The power supply device for a docking station according to claim 5, characterized in that: The first transistor, the second transistor, the third transistor and the fourth transistor all comprise MOS tubes; the gate of the first transistor is connected to the drain of the third transistor, and the gate of the second transistor is connected to the drain of the fourth transistor.

7. The power supply device of a docking station according to claim 1, wherein, Further comprising a power supply detection circuit, the power supply detection circuit is connected to the host device, the adapter and the protocol chip respectively; the protocol chip detects the power supply voltage of the host device and the adapter through the power supply detection circuit.

8. The power supply device of a docking station according to claim 7, wherein, The power supply detection circuit comprises a first voltage dividing resistor connected to the host device and a second voltage dividing resistor connected to the adapter; the protocol chip is used for detecting the voltage after voltage division through the first voltage dividing resistor and the second voltage dividing resistor to obtain the power supply voltage.

9. The power supply device of a docking station according to claim 1, wherein, The protocol chip comprises a PD protocol chip.

10. A docking station, characterized by The power supply device comprises the docking station of any one of claims 1-9, and a docking station body; The docking station body comprises a power supply module, and the power supply module is connected to the power supply switching circuit and the power supply direct connection circuit respectively.

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