External display card base plate based on thunder and lightning interface 3

Abstract

The utility model belongs to the field of thunder and lightning interfaces, and relates to an external display card base plate based on a thunder and lightning interface 3, which comprises the thunder and lightning interface 3, a 12V input circuit, a 5V power supply circuit, a 3V3 power supply circuit, a 12V fan power supply circuit, a 5V fan power supply circuit, an MXM3 connector and a DP output circuit which are electrically connected, high-speed transmission of image data and power supply of a display card are achieved, the 12V input circuit is used for receiving 12V direct-current voltage provided by an external power source, and the 5V power supply circuit is used for providing 5V direct-current voltage. High-speed data transmission and high-efficiency display card expansion are realized, the graphic processing capability of the system is greatly improved, and application requirements of professional graphic design, video editing, high-performance games and the like are met; the intelligent fan control function is achieved, PWM adjustment can be conducted according to the temperature of the display card, and the heat dissipation performance and noise control are effectively balanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of thunderbolt interface, more specifically, relates to a thunderbolt 3 interface based external graphics card bottom plate. BACKGROUND

[0002] The deficiencies of the existing external graphics card bottom plate in function expansion performance mainly manifest in the following aspects:

[0003] The limitation of power supply is also a key factor restricting the performance of the external graphics card bottom plate. External graphics cards usually require additional power supply, and the power supply system of a notebook computer may not meet the power consumption demand of high-end graphics cards. This will result in limited performance of the external graphics card during operation, and the external graphics card cannot fully exert its performance level.

[0004] The heat dissipation problem is also an important aspect of the performance deficiency of the external graphics card bottom plate. The heat dissipation effect of the external graphics card is usually not as good as that of the built-in graphics card. Long-time high-load operation easily leads to overheating of the graphics card, which further affects its performance. Poor heat dissipation may also cause damage to the graphics card, thereby further reducing the reliability of the external graphics card bottom plate. SUMMARY

[0005] In view of the above defects of the prior art, the utility model provides a thunderbolt 3 interface based external graphics card bottom plate, which comprises:

[0006] Through the electrically connected thunderbolt 3 interface, 12V input circuit, 5V power supply circuit, 3V3 power supply circuit, 12V fan power supply circuit, 5V fan power supply circuit, MXM3 connector and DP output circuit, the thunderbolt 3 interface transmits data with the graphics card through the PCI e channel, realizes high-speed transmission of image data and power supply of the graphics card, the 12V input circuit is used for receiving 12V direct current voltage provided by an external power supply, the 5V power supply circuit is used for providing 5V direct current voltage, the 3V3 power supply circuit is used for providing a power supply part of 3.3V direct current voltage, the 12V fan power supply circuit is used for providing a power supply part of 12V direct current voltage for a fan, the 5V fan power supply circuit is used for providing a power supply part of 5V direct current voltage for a fan, the MXM3 connector is used for providing an electrical connection and a signal transmission channel, so that the MXM3 interface graphics card can be stably connected to the bottom plate, and the DP output circuit is used for converting a video signal processed by the graphics card into a DisplayPort format and outputting to a display.

[0007] Preferably, the 12V input circuit comprises: the negative pole of diode D15 is connected with one end of capacitor C139, one end of capacitor C140, one end of resistor R115, one end of fuse L24, one end of fuse L25 respectively and inputs DC input, the positive pole of diode D15 is grounded, the other end of fuse L24 is connected with the other end of fuse L25, one end of capacitor C141, one end of capacitor C142, one end of capacitor C143 respectively and inputs DC 12V input.

[0008] Preferably, the 5V power supply circuit comprises: pin 1 of power management chip U17 is connected with pin 12 of power management chip U17, one end of capacitor C149, one end of capacitor C148, one end of capacitor SC1, one end of capacitor C147, one end of capacitor C146, one end of resistor R119 respectively and inputs DC 12V input, pin 5 of power management chip U17 is connected with the other end of resistor R119, one end of capacitor C158, one end of resistor R121 respectively, the other end of capacitor C158 is connected with the other end of resistor R121 and grounded, pin 6 of power management chip U17 is connected with one end of resistor R120, pin 9 of power management chip U17 is connected with the other end of resistor R120, one end of capacitor C157 respectively, pin 2 of power management chip U17 is connected with pin 3 of power management chip U17, pin 10 of power management chip U17, one end of capacitor C151 respectively and grounded, pin 11 of power management chip U17 is connected with the other end of capacitor C151, one end of resistor R118 respectively, pin 7 of power management chip U17 is connected with one end of capacitor C145, one end of capacitor C150, one end of inductor SL2 respectively, the other end of capacitor C150 is connected with one end of resistor R117, the other end of inductor SL2 is connected with one end of capacitor SC2, one end of capacitor C0805, one end of capacitor C152, one end of capacitor C153, one end of capacitor C154, one end of capacitor C155, one end of capacitor C156, the other end of resistor R118 respectively.

[0009] Preferably, the 3V3 power supply circuit comprises: one end of magnetic bead L1 is connected with one end of capacitor C1, one end of capacitor C2, one end of capacitor C3, one end of capacitor C4, one end of capacitor C5, one end of capacitor C6 respectively and inputs VCC 3V3, the other end of capacitor C1, the other end of capacitor C2, the other end of capacitor C3, the other end of capacitor C4, the other end of capacitor C5 and the other end of capacitor C6 are all grounded.

[0010] Preferably, the 12V fan power supply circuit comprises: one end of the resistor R156 is connected with one end of the resistor R155 and the gate of the field effect transistor Q14 respectively, the drain of the field effect transistor Q14 is connected with one end of the resistor R154 and the gate of the field effect transistor SQ4 respectively, the drain of the field effect transistor SQ4 is connected with one end of the capacitor C184, one end of the resistor R152, pin 4 of the rectifier bridge Q13 respectively, the other end of the capacitor C184 is connected with one end of the magnetic bead L26, the other end of the resistor R152, pin 1 of the rectifier bridge Q13, pin 2 of the rectifier bridge Q13, pin 3 of the rectifier bridge Q13 respectively, pin 5 of the rectifier bridge Q13 is connected with pin 6 of the rectifier bridge Q13, pin 7 of the rectifier bridge Q13, pin 8 of the rectifier bridge Q13, one end of the capacitor C183 and pin 2 of the row pin connector CN28 respectively.

[0011] Preferably, the 5V fan power supply circuit comprises: pin 1 of the power switch chip U3 is connected with one end of the capacitor C13 and one end of the capacitor C14 respectively, pin 2 of the power switch chip U3 is connected with one end of the resistor R132, pin 3 of the power switch chip U3 is connected with one end of the resistor R3, pin 4 of the power switch chip U3 is connected with the negative electrode of the diode D2 and the negative electrode of the diode D4 respectively, pin 6 of the power switch chip U3 is connected with the other end of the resistor R3 and one end of the capacitor C12 respectively, the positive electrode of the diode D4 is connected with one end of the resistor R7 and the drain of the field effect transistor Q1 respectively, the gate of the field effect transistor Q1 is connected with one end of the resistor R8 and one end of the resistor R150 respectively.

[0012] Preferably, the DP output circuit comprises: a display port transmitter hot plug detection circuit, the display port transmitter hot plug detection circuit comprises that the positive electrode of the diode D5 is grounded, and the negative electrode of the diode D5 is connected with one end of the resistor R25.

[0013] Preferably, the bottom plate further comprises: an AUX 3.3V power supply circuit.

[0014] Preferably, the AUX 3.3V power supply circuit comprises: pin 1 of the power switch chip U1 is connected with one end of the capacitor C8 and one end of the capacitor C9 respectively, the other end of the capacitor C8 and the other end of the capacitor C9 are grounded, pin 2 of the power switch chip U1 is connected with one end of the resistor R136, pin 3 of the power switch chip U1 is connected with one end of the resistor R1, pin 4 of the power switch chip U1 is connected with one end of the resistor R137 and one end of the resistor R2 respectively, the other end of the resistor R1 is connected with the other end of the resistor R137 and one end of the capacitor C7 respectively, and the other end of the capacitor C7 is grounded.

[0015] Preferably, the size of the bottom plate is 110-150mm in length and 90-110mm in width.

[0016] The external graphics card bottom plate based on the thunderbolt 3 interface has the following beneficial effects: high-speed data transmission and high-performance graphics card expansion are realized through the thunderbolt 3 interface, the system's graphic processing capability is greatly improved, and application requirements of professional graphic design, video editing and high-performance games are met; a perfect power supply system is equipped, including a 12V input circuit, a 5V and 3V3 power supply circuit and a 12V and 5V power supply circuit specially designed for a fan, stable operation of the graphics card is ensured, especially for the MXM3.1 standard graphics card, sufficient power supply capacity of 5V maximum 2.5A, 3.3V maximum 2A and 12V-20V maximum 10A is provided, and the power requirement of the high-end graphics card is fully met; the M.2 interface thunderbolt 3 core board card is supported, the Intel and NVIDIA graphics cards of the MXM3.1 TYPE-A and MXM TYPE-B standards are compatible, rich graphics card selection space is provided for users, and the flexibility and expansibility of the system are enhanced; the intelligent fan control function is provided, PWM adjustment can be performed according to the graphics card temperature, heat dissipation performance and noise control are effectively balanced, and the switch control of the fan power supply is supported, and the stability and energy efficiency of the system are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art. The present application will be further described below in combination with the drawings and embodiments. In the drawings:

[0018] Figure 1 is a module structure schematic diagram of the external graphics card bottom plate based on the thunderbolt 3 interface of the present application;

[0019] Figure 2 is a 12V input circuit circuit diagram in the thunderbolt 3 interface of the present application;

[0020] Figure 3 is a 5V power supply circuit circuit diagram in the thunderbolt 3 interface of the present application;

[0021] Figure 4 is a 3V3 power supply circuit circuit diagram in the thunderbolt 3 interface of the present application;

[0022] Figure 5 is a 12V fan power supply circuit circuit diagram in the thunderbolt 3 interface of the present application;

[0023] Figure 6 is a 5V fan power supply circuit circuit diagram in the thunderbolt 3 interface of the present application;

[0024] Figure 7 is the display port transmitter hot plug detection circuit based on the thunder and lightning 3 interface of the utility model circuit diagram;

[0025] Figure 8 is the AUX 3.3V power supply circuit based on the thunder and lightning 3 interface of the utility model circuit diagram. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications also change accordingly.

[0028] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.

[0029] Please refer to Figure 1 is the module structure schematic diagram of the external graphics card bottom plate based on the thunder and lightning 3 interface of the utility model. As Figure 1As shown, the external graphics card baseboard based on the Thunderbolt 3 interface provided in the first embodiment of this utility model includes at least a Thunderbolt 3 interface, a 12V input circuit, a 5V power supply circuit, a 3V3 power supply circuit, a 12V fan power supply circuit, a 5V fan power supply circuit, an MXM3 connector, and a DP output circuit, all electrically connected. The Thunderbolt 3 interface transmits data with the graphics card through the PCI e channel, enabling high-speed transmission of image data and power supply to the graphics card. The 12V input circuit receives a 12V DC voltage from an external power source. The 5V power supply circuit provides a 5V DC voltage. The 3V3 power supply circuit provides a 3.3V DC voltage. The 12V fan power supply circuit provides a 12V DC voltage. The 5V fan power supply circuit provides a 5V DC voltage. The MXM3 connector provides an electrical connection and signal transmission channel, enabling the MXM3 interface graphics card to be stably connected to the baseboard. The DP output circuit converts the video signal processed by the graphics card into a Digital SpreadPort format and outputs it to the monitor.

[0030] Thunderbolt 3 is a connector standard released by Intel, designed as a universal bus for connecting PCs to other devices. The Thunderbolt 3 interface integrates PCI Express data transfer technology and Dispatch Port display technology, and can replace many existing connection device interfaces such as DVI, Dispatch Port, SCSI, SATA, USB, PCI Express, and HDMI.

[0031] The Thunderbolt 3 interface uses a USB Type-C physical form factor, with a transfer speed of up to 40Gbps. It can connect two 4K displays or one 5K display, and is more power-efficient than its predecessor, providing 100W of power delivery.

[0032] Thunderbolt 3, a high-speed data transfer interface jointly developed by Intel and Apple, boasts speeds up to 40Gbps and supports advanced features such as external graphics cards. This utility model's substrate, via the Thunderbolt 3 interface, can connect to a laptop, allowing users to connect a high-performance discrete graphics card to a thin and light laptop or a laptop without the ability to upgrade its graphics card, thereby enhancing its graphics processing capabilities.

[0033] Figure 2 This is a circuit diagram of the 12V input circuit in the Thunderbolt 3 interface, based on this utility model. Figure 2As shown, the 12V input circuit includes: the negative pole of diode D15 is connected with one end of capacitor C139, one end of capacitor C140, one end of resistor R115, one end of fuse L24, one end of fuse L25 respectively and accesses DC input, the positive pole of diode D15 is grounded, the other end of fuse L24 is connected with the other end of fuse L25, one end of capacitor C141, one end of capacitor C142, one end of capacitor C143 respectively and accesses DC 12V input.

[0034] The 12V input circuit is an important power supply part of the external graphics card base plate, which is used for receiving 12V DC voltage provided by external power supply and distributing it to each circuit and element on the base plate.

[0035] The 12V input circuit provides stable power supply voltage for the graphics card, ensures that the graphics card can work normally. When the notebook computer is connected with the external graphics card base plate through the thunderbolt 3 interface, the 12V input circuit provides the required power supply voltage for the graphics card, so that the graphics card can process image data and transmit it back to the notebook computer display.

[0036] Figure 3 It is the 5V power supply circuit diagram based on the thunderbolt 3 interface in the utility model. As shown in the figure, Figure 3 The 5V power supply circuit includes: the pin 1 of power management chip U17 is connected with the pin 12 of power management chip U17, one end of capacitor C149, one end of capacitor C148, one end of capacitor SC1, one end of capacitor C147, one end of capacitor C146, one end of resistor R119 respectively and accesses DC 12V input, the pin 5 of power management chip U17 is connected with the other end of resistor R119, one end of capacitor C158, one end of resistor R121 respectively, the other end of capacitor C158 is connected with the other end of resistor R121 and grounded, the pin 6 of power management chip U17 is connected with one end of resistor R120, the pin 9 of power management chip U17 is connected with the other end of resistor R120, one end of capacitor C157 respectively, the pin 2 of power management chip U17 is connected with the pin 3 of power management chip U17, the pin 10 of power management chip U17, one end of capacitor C151 respectively and grounded, the pin 11 of power management chip U17 is connected with the other end of capacitor C151, one end of resistor R118 respectively, the pin 7 of power management chip U17 is connected with one end of capacitor C145, one end of capacitor C150, one end of inductor SL2 respectively, the other end of capacitor C150 is connected with one end of resistor R117, the other end of inductor SL2 is connected with one end of capacitor SC2, one end of capacitor C0805, one end of capacitor C152, one end of capacitor C153, one end of capacitor C154, one end of capacitor C155, one end of capacitor C156, the other end of resistor R118 respectively.

[0037] 5V power supply circuit is mainly used to provide stable 5V DC voltage to power the fan, control chip and other components on the bottom plate.

[0038] 5V power supply circuit provides power supply voltage for components such as fans and control chips on the bottom plate, ensuring that these components can work normally. The fan ensures that the graphics card does not overheat during operation through heat dissipation, and the control chip is responsible for managing and regulating various circuits and components on the bottom plate. The normal operation of these components provides a guarantee for the stable operation of the graphics card.

[0039] Figure 4 is the 3V3 power supply circuit based on the lightning 3 interface of the utility model. As shown in Figure 4 , the 3V3 power supply circuit includes: one end of the magnetic bead L1 is connected with one end of the capacitor C1, one end of the capacitor C2, one end of the capacitor C3, one end of the capacitor C4, one end of the capacitor C5, one end of the capacitor C6 and is connected to VCC 3V3, and the other end of the capacitor C1, the other end of the capacitor C2, the other end of the capacitor C3, the other end of the capacitor C4, the other end of the capacitor C5 and the other end of the capacitor C6 are all grounded.

[0040] The main function of the 3V3 power supply circuit is to provide stable 3.3V DC voltage to power some circuits and components on the bottom plate, such as MXM3 connector, part of the control chip, etc.

[0041] 3V3 power supply circuit provides power supply voltage for some circuits and components on the bottom plate, ensuring that these circuits and components can work normally. For example, the MXM3 connector obtains power supply voltage through the 3V3 power supply circuit and can stably connect and transmit graphics card signals. The normal operation of these circuits and components provides a guarantee for the stable operation of the graphics card.

[0042] In specific implementation, the embodiment supports 12V-20V external power supply, which can meet the power supply of the lightning core board card, the maximum current of 5V of MXM3.1 is 2.5A, the maximum current of 3.3V is 2A, and the maximum current of 12V-20V is 10A.

[0043] Figure 5 is the 12V fan power supply circuit based on the lightning 3 interface of the utility model. As shown in Figure 5As shown, the 12V fan power supply circuit includes: one end of the resistor R156 is connected with one end of the resistor R155 and the gate of the field effect transistor Q14 respectively, the drain of the field effect transistor Q14 is connected with one end of the resistor R154 and the gate of the field effect transistor SQ4 respectively, the drain of the field effect transistor SQ4 is connected with one end of the capacitor C184, one end of the resistor R152, the pin 4 of the rectifier bridge Q13 respectively, the other end of the capacitor C184 is connected with one end of the magnetic bead L26, the other end of the resistor R152, the pin 1 of the rectifier bridge Q13, the pin 2 of the rectifier bridge Q13, the pin 3 of the rectifier bridge Q13 respectively, the pin 5 of the rectifier bridge Q13 is connected with the pin 6 of the rectifier bridge Q13, the pin 7 of the rectifier bridge Q13, the pin 8 of the rectifier bridge Q13, one end of the capacitor C183 and the pin 2 of the row pin connector CN28 respectively.

[0044] The main function of the 12V fan power supply circuit is to provide stable 12V DC voltage to power the fan on the bottom plate, ensuring that the graphics card can be effectively cooled during operation.

[0045] The external graphics card bottom plate also has a PWM (pulse width modulation) adjustment function, which can adjust the speed of the fan according to the temperature of the graphics card to achieve better cooling effect. When the temperature of the graphics card is high, the PWM regulator will increase the speed of the fan to improve the cooling effect; when the temperature of the graphics card is low, the PWM regulator will reduce the speed of the fan to reduce noise and power consumption.

[0046] The 12V fan power supply circuit provides stable power supply voltage for the fan, and through PWM adjustment and fan switch function, ensures that the graphics card can be effectively cooled during operation. Good cooling conditions provide protection for the stable operation of the graphics card, so that the graphics card can continuously process image data and transmit it back to the notebook computer display.

[0047] Figure 6 It is the 5V fan power supply circuit circuit diagram based on the lightning 3 interface of the utility model. As shown in the figure, Figure 6 As shown, the 5V fan power supply circuit includes: the pin 1 of the power switch chip U3 is connected with one end of the capacitor C13 and one end of the capacitor C14 respectively, the pin 2 of the power switch chip U3 is connected with one end of the resistor R132, the pin 3 of the power switch chip U3 is connected with one end of the resistor R3, the pin 4 of the power switch chip U3 is connected with the negative electrode of the diode D2 and the negative electrode of the diode D4 respectively, the pin 6 of the power switch chip U3 is connected with the other end of the resistor R3 and one end of the capacitor C12 respectively, the positive electrode of the diode D4 is connected with one end of the resistor R7 and the drain of the field effect transistor Q1 respectively, the gate of the field effect transistor Q1 is connected with one end of the resistor R8 and one end of the resistor R150 respectively.

[0048] The main function of the 5V fan power supply circuit is to provide a stable 5V DC voltage to power some fans on the motherboard, ensuring that the graphics card can be properly cooled during operation.

[0049] This embodiment supports 12V and 5V fans, and can adjust the fan power supply according to the temperature of the graphics card.

[0050] Figure 7 The utility model is based on the display port transmitter hot plug detection circuit in thunderbolt 3 interface, as shown in the drawing. Figure 7 As shown in the drawing, the DP output circuit includes: a display port transmitter hot plug detection circuit, the display port transmitter hot plug detection circuit includes a positive electrode of diode D5 connected to ground, and a negative electrode of diode D5 connected to one end of resistor R25.

[0051] In specific implementation, the embodiment can support two-way DP output, expanding the application scenarios of the utility model.

[0052] The 5V fan power supply circuit also supports PWM adjustment and fan switching function. The PWM regulator can adjust the speed of the 5V fan according to the temperature of the graphics card to achieve better cooling effect. At the same time, when the temperature of the graphics card is lower than a certain threshold, the 5V fan can be automatically turned off to further reduce noise and power consumption.

[0053] The 5V fan power supply circuit provides stable power supply voltage for some fans, and through PWM adjustment and fan switching function, it ensures that the graphics card can be properly cooled during operation. Although the cooling effect of 5V fan may not be as good as 12V fan, in some cases, 5V fan can still provide necessary cooling support to ensure stable operation of the graphics card.

[0054] MXM3 connector is an important part of external graphics card motherboard for connecting MXM3 interface graphics card. MXM (Mobile PCI Module) is a kind of interface standard of graphics card based on PCI signal specification, which is widely used in notebook computer and external graphics card motherboard.

[0055] The main function of MXM3 connector is to provide stable electrical connection and signal transmission channel, so that MXM3 interface graphics card can be stably connected to the motherboard and realize image data transmission and graphics card power supply.

[0056] MXM3 connector is connected with MXM3 interface graphics card through gold finger, and the contact on gold finger corresponds to the contact on graphics card, forming electrical connection. When the graphics card is inserted into the MXM3 connector on the motherboard, the gold finger and the contact are in close contact, ensuring stable signal transmission.

[0057] The embodiment supports MXM interface, and can support Intel graphics card and NVIDIA graphics card of MXM3.1 TYPE-A and MXM TYPE-B standards.

[0058] Figure 8 It is the circuit diagram of the AUX 3.3V power supply circuit in the thunderbolt 3 interface based on the utility model. Figure 8 As shown in the figure, in specific implementation, the utility model bottom plate still includes: AUX 3.3V power supply circuit. AUX 3.3V power supply circuit includes: the pin 1 of power supply switch chip U1 is connected with one end of capacitor C8 and one end of capacitor C9 respectively, the other end of capacitor C8 and the other end of capacitor C9 are all grounded, the pin 2 of power supply switch chip U1 is connected with one end of resistance R136, the pin 3 of power supply switch chip U1 is connected with one end of resistance R1, the pin 4 of power supply switch chip U1 is connected with one end of resistance R137 and one end of resistance R2 respectively, the other end of resistance R1 is connected with the other end of resistance R137 and one end of capacitor C7 respectively, and the other end of capacitor C7 is grounded.

[0059] AUX 3.3V power supply circuit provides stable 3.3V voltage for external devices such as graphics card, ensuring stable operation of the device under complex operation and high load. This power supply circuit not only provides necessary power support, but also optimizes the energy consumption performance of the device through its precise voltage regulation capability, prolonging the service life of the device.

[0060] In specific application, AUX 3.3V power supply circuit can ensure that graphics card will not appear power supply shortage when operating at high speed, thereby avoiding performance decline or device damage caused by power supply problem. At the same time, this power supply circuit also has overcurrent, overvoltage and other protection functions, further improving the safety and stability of external devices.

[0061] The external display bottom plate of thunderbolt 3 interface does not directly supply 12V power supply to the thunderbolt module, but only converts 3.3V to supply the thunderbolt module, 12V power supply is directly supplied to MXM, and 5V voltage is converted to supply the fan, and 3.3V is supplied to MXM.

[0062] In specific implementation, the utility model bottom plate size is 110-150mm long and 90-110mm wide. In the embodiment, the length of the bottom plate is set to 130mm, and the width is set to 100mm, which is basically the same size as the MXM TYPE-B board card.

[0063] The utility model discloses a design through above embodiment, its beneficial effect is: through the realization of high -speed data transmission and high -efficient performance video card extension through thunder and lightning 3 interface, has greatly promoted the system's graphic processing capacity, has met professional graphics design, video editing and high -performance game etc. Application demand, has been equipped with perfect power supply system, including 12V input circuit, 5V and 3V3 power supply circuit and specially designed 12V and 5V power supply circuit for fan, has guaranteed the stable operation of video card, especially for MXM3.1 standard video card, has provided 5V maximum 2.5A, 3.3V maximum 2A, 12V~20V maximum 10A sufficient power supply capacity, has fully met the power requirement of high -end video card, supports M.2 interface thunder and lightning 3 core board card, is compatible with MXM3.1 TYPE-A and MXM TYPE-B standard's Intel and NVIDIA video card, provides rich video card selection space for user, enhances the flexibility and expandability of system, has the intelligent fan control function, can carry out PWM adjustment according to video card temperature, effectively balances the heat dissipation performance and noise control, supports the switch control of fan power simultaneously, further improves the stability and energy efficiency of system.

[0064] The utility model is described according to specific embodiments, but those skilled in the art should understand that various changes and equivalent replacements can be carried out without departing from the scope of the utility model. In addition, in order to adapt to specific occasions of the utility model technology, the utility model can be modified in many ways without departing from the scope of protection. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of protection claimed.

Claims

1. A PCI Express® based external graphics card board, wherein, Comprise: Through the electrical connection of thunder 3 interface, 12V input circuit, 5V power supply circuit, 3V3 power supply circuit, 12V fan power supply circuit, 5V fan power supply circuit, MXM3 connector and DP output circuit, the thunder 3 interface transmits data with the graphic card through PCIe channel, realizes high-speed transmission of image data and power supply of graphic card, the 12V input circuit is used for receiving 12V DC voltage provided by external power supply, the 5V power supply circuit is used for providing 5V DC voltage, the 3V3 power supply circuit is used for providing 3.3V DC voltage power supply part, the 12V fan power supply circuit is used for providing 12V DC voltage power supply part for fan, the 5V fan power supply circuit is used for providing 5V DC voltage power supply part for fan, the MXM3 connector is used for providing electrical connection and signal transmission channel, so that MXM3 interface graphic card can be stably connected to the bottom plate, the DP output circuit is used for converting video signal processed by graphic card into DisplayPort format and outputting to display.

2. The PCI-based external graphics card add-in board of claim 1, wherein, The 12V input circuit comprises: the negative electrode of diode D15 is connected with one end of capacitor C139, one end of capacitor C140, one end of resistor R115, one end of fuse L24 and one end of fuse L25 respectively and accesses direct current input, the positive electrode of diode D15 is grounded, the other end of fuse L24 is connected with the other end of fuse L25, one end of capacitor C141, one end of capacitor C142 and one end of capacitor C143 respectively and accesses direct current 12V input.

3. The PCI-based external graphics card docking platform according to claim 1, wherein, The 5V power supply circuit includes: the pin 1 of the power management chip U17 is connected with the pin 12 of the power management chip U17, one end of the capacitor C149, one end of the capacitor C148, one end of the capacitor SC1, one end of the capacitor C147, one end of the capacitor C146, one end of the resistor R119 respectively and inputs DC 12V, the pin 5 of the power management chip U17 is connected with the other end of the resistor R119, one end of the capacitor C158, one end of the resistor R121 respectively, the other end of the capacitor C158 is connected with the other end of the resistor R121 and grounded, the pin 6 of the power management chip U17 is connected with one end of the resistor R120, the pin 9 of the power management chip U17 is connected with the other end of the resistor R120, one end of the capacitor C157 respectively, the pin 2 of the power management chip U17 is connected with the pin 3 of the power management chip U17, the pin 10 of the power management chip U17, one end of the capacitor C151 respectively and grounded, the pin 11 of the power management chip U17 is connected with the other end of the capacitor C151, one end of the resistor R118 respectively, the pin 7 of the power management chip U17 is connected with one end of the capacitor C145, one end of the capacitor C150, one end of the inductor SL2 respectively, the other end of the capacitor C150 is connected with one end of the resistor R117, the other end of the inductor SL2 is connected with one end of the capacitor SC2, one end of the capacitor C0805, one end of the capacitor C152, one end of the capacitor C153, one end of the capacitor C154, one end of the capacitor C155, one end of the capacitor C156, the other end of the resistor R118 respectively.

4. The PCI-based external graphics card add-in board of claim 1, wherein, The 3V3 power supply circuit includes: one end of the magnetic bead L1 is connected with one end of the capacitor C1, one end of the capacitor C2, one end of the capacitor C3, one end of the capacitor C4, one end of the capacitor C5, one end of the capacitor C6 respectively and inputs VCC 3V3, the other end of the capacitor C1, the other end of the capacitor C2, the other end of the capacitor C3, the other end of the capacitor C4, the other end of the capacitor C5 and the other end of the capacitor C6 are grounded.

5. The Thunderbolt 3 interface based add-in graphics card board of claim 1, wherein, The 12V fan power supply circuit includes: one end of the resistor R156 is connected with one end of the resistor R155 and the gate of the field effect transistor Q14 respectively, the drain of the field effect transistor Q14 is connected with one end of the resistor R154 and the gate of the field effect transistor SQ4 respectively, the drain of the field effect transistor SQ4 is connected with one end of the capacitor C184, one end of the resistor R152, the pin 4 of the rectifier bridge Q13 respectively, the other end of the capacitor C184 is connected with one end of the magnetic bead L26, the other end of the resistor R152, the pin 1 of the rectifier bridge Q13, the pin 2 of the rectifier bridge Q13, the pin 3 of the rectifier bridge Q13 respectively, the pin 5 of the rectifier bridge Q13 is connected with the pin 6 of the rectifier bridge Q13, the pin 7 of the rectifier bridge Q13, the pin 8 of the rectifier bridge Q13, one end of the capacitor C183 and the pin 2 of the row pin connector CN28 respectively.

6. The thunderbolt 3 interface based add-in graphics card board of claim 1, wherein, The 5V fan power supply circuit includes: the pin 1 of the power switch chip U3 is connected with one end of the capacitor C13 and one end of the capacitor C14 respectively, the pin 2 of the power switch chip U3 is connected with one end of the resistor R132, the pin 3 of the power switch chip U3 is connected with one end of the resistor R3, the pin 4 of the power switch chip U3 is connected with the negative electrode of the diode D2 and the negative electrode of the diode D4 respectively, the pin 6 of the power switch chip U3 is connected with the other end of the resistor R3 and one end of the capacitor C12 respectively, the positive electrode of the diode D4 is connected with one end of the resistor R7 and the drain of the field effect transistor Q1 respectively, the gate of the field effect transistor Q1 is connected with one end of the resistor R8 and one end of the resistor R150 respectively.

7. The Thunderbolt 3 interface-based add-in graphics card board of claim 1, wherein, The DP output circuit includes: a display port transmitter hot plug detection circuit, the display port transmitter hot plug detection circuit includes that the positive electrode of the diode D5 is grounded, one end of the resistor R25 is connected with the negative electrode of the diode D5.

8. The PCI-based external graphics card dock according to any one of claims 1 to 7, wherein, The bottom plate further includes: an AUX 3.3V power supply circuit.

9. The PCI-based external graphics card add-in board of claim 8, wherein, The AUX 3.3V power supply circuit includes: the pin 1 of the power switch chip U1 is connected with one end of the capacitor C8 and one end of the capacitor C9 respectively, the other end of the capacitor C8 and the other end of the capacitor C9 are grounded, one end of the resistor R136 is connected with the pin 2 of the power switch chip U1, one end of the resistor R1 is connected with the pin 3 of the power switch chip U1, one end of the resistor R137 and one end of the resistor R2 are connected with the pin 4 of the power switch chip U1 respectively, the other end of the resistor R1 is connected with the other end of the resistor R137 and one end of the capacitor C7 respectively, the other end of the capacitor C7 is grounded.

10. The Thunderbolt 3 interface based add-in graphics card board of claim 1, wherein, The size of the bottom plate is 110-150mm long and 90-110mm wide.

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