CN214846701U - Protection circuit of docking station data interface - Google Patents
Protection circuit of docking station data interface Download PDFInfo
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- CN214846701U CN214846701U CN202121447172.5U CN202121447172U CN214846701U CN 214846701 U CN214846701 U CN 214846701U CN 202121447172 U CN202121447172 U CN 202121447172U CN 214846701 U CN214846701 U CN 214846701U
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Abstract
The utility model discloses a protection circuit of docking station data interface relates to docking station circuit protection technical field. The utility model comprises a data conversion Control chip Control IC, a TF data interface, an SD data interface and an electrostatic protection device; the electrostatic protection device also comprises a third electrostatic protection device, a fourth electrostatic protection device and a fifth electrostatic protection device; and the third electrostatic protection device is connected between the data conversion Control chip Control IC and the docking station main Control MCU. The utility model discloses a novel interface protection circuit of data interface design of docking station has promoted the anti surge ability of docking station data interface unit circuit, has improved the reliability of product, effectively prevents thunderbolt surge and the static disturbance that the transmission line introduced, fine protection internal Control chip Control IC and main Control MCU for interface communication and interface circuit obtain fine protection, and the overall stability of product obtains guaranteeing.
Description
Technical Field
The utility model belongs to the technical field of the protection of docking station circuit, especially, relate to a protection circuit of docking station data interface, mainly be applied to the data communication interface circuit between docking station master control MCU and SD card and the TF card.
Background
With the demand of light and thin experience and the technical improvement, especially, the notebook computer only reserves a Type-C interface for typical portable equipment gradually, and not only provides a power supply, but also performs high-speed data transmission. When external equipment such as a projector, a USB peripheral, an HDMI (high-definition multimedia interface), an SD (secure digital) card and the like needs to be connected in a wired mode, a single Type-C interface is not enough; docking Station, known in the english name as Docking Station, is a base for extending a port of a notebook computer. The docking interface of a docking station generally includes PD power supply interface, USB3.0, USB2.0, RJ45, HDMI, VGA, SD card, TF card, etc. for power supply and data interconversion and data communication, respectively.
The utility model mainly aims at the SD/TF data communication interface of the docking station to carry out protection scheme design; in the practical use process of the SD/TF card and other circuits of the docking station, the internal data conversion chip IC and the communication line are easily influenced by factors such as SD, TF card plugging and unplugging, power supply fluctuation, human body static electricity and the like, and normal data communication and product stability are damaged.
SUMMERY OF THE UTILITY MODEL
The utility model provides a protection circuit of docking station data interface has solved above problem.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model discloses a protection circuit of a docking station data interface, which comprises a data conversion control chip of a docking station, a TF data interface and an SD data interface; the data conversion control chip is connected with the docking station main control MCU through a VBUS pin, an SD _ Dp pin, an SD _ Dm pin and a GND pin to complete data communication and control; the data conversion control chip is connected with data terminals DAT0, DAT1, DAT2 and DAT3 ports of the TF data interface and the SD data interface through pins D0, D1, D2 and D3 for data transmission; the data conversion control chip is connected with CMD and CLK ports of the TF and SD data interfaces through the CMD and CLK ports and receives and transmits control signals; the data conversion control chip supplies power to the data interface through VDD and GND ports, and is characterized in that:
the electrostatic protection device also comprises a third electrostatic protection device, a fourth electrostatic protection device and a fifth electrostatic protection device;
the third electrostatic protection device is connected between the data conversion Control chip Control IC and the docking station main Control MCU; a pin 4 of the third electrostatic protection device ESD3 is connected with a VBUS wire, and pins 2 and 3 are connected with SD _ Dp and SD _ Dm wires; 1 pin is connected with GND ground wire;
a pin 1 of the fourth electrostatic protection device is connected with a control communication line CMD, a pin 2 is connected with CLK, and a pin 3 is connected with a GND ground wire;
Further, the third electrostatic protection device is packaged by SOT-143 and has 3-path electrostatic and surge protection functions.
Further, the fourth electrostatic protection device is packaged by SOT-23, and VBR is 5V.
Further, the fifth electrostatic protection device is packaged by adopting a DFN2510, VBR is 5V, and capacitance characteristic is an ultra-low capacitance less than 1 PF.
Compared with the prior art, the utility model following beneficial effect including:
1. the third electrostatic protection device, the fourth electrostatic protection device and the fifth electrostatic protection device of the circuit of the utility model all have the multi-line protection effect, one device can simultaneously carry out three-way, two-way and four-way surge or electrostatic protection, which can save the physical space of PCB layout and wiring design, is beneficial to reducing the PCB size and weight of the docking station and can embody the characteristics of portable equipment;
2. the fourth electrostatic protection device and the fifth electrostatic protection device of the circuit of the utility model have an ultralow capacitance less than 1PF, can meet the speed requirements of high-speed communication and high-speed SD card reading between the docking station main control MCU and the data conversion IC, avoid the phenomenon of high error rate caused by overlarge capacitance of the device junction during high-speed signal transmission or data reading, and ensure the reliability of the product;
3. through the circuit, the data conversion chip Control IC and the data communication rate of the SD/TF card in the docking station are well protected, and the overall stability of a product is well ensured.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a protection circuit of a docking station data interface according to the present invention;
fig. 2 is a block diagram of the docking station composition architecture of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, the protection circuit of a docking station data interface of the present invention includes a data conversion Control chip Control IC, a TF data interface J1, and an SD data interface J2 of the docking station; the data conversion Control chip Control IC is connected with the docking station main Control MCU through a VBUS pin, an SD _ Dp pin, an SD _ Dm pin and a GND pin to complete data communication and Control; the data conversion Control chip Control IC is connected with data terminals DAT0, DAT1, DAT2 and DAT3 ports of the TF data interface and the SD data interface through pins D0, D1, D2 and D3 for data transmission; the data conversion Control chip Control IC is connected with CMD and CLK ports of the TF and SD data interfaces through the CMD and CLK ports to receive and transmit Control signals; the data conversion Control chip Control IC supplies power to the data interface through VDD and GND ports;
further comprising a third electrostatic protection device ESD3, a fourth electrostatic protection device ESD4 and a fifth electrostatic protection device ESD 5;
the third electrostatic protection device ESD3 is connected between the data conversion Control chip Control IC and the docking station main Control MCU; a pin 4 of a third electrostatic protection device ESD3 is connected with a VBUS wire for surge protection of a power supply end, and pins 2 and 3 are connected with SD _ Dp and SD _ Dm wires for double-wire electrostatic protection; 1 pin is connected with GND ground wire;
a pin 1 of the fourth electrostatic protection device ESD4 is connected with the control communication line CMD, a pin 2 is connected with CLK, and a pin 3 is connected with GND ground;
The third electrostatic protection device ESD3 is packaged by SOT-143, and has 3-path electrostatic and surge protection functions.
The fourth electrostatic protection device ESD4 is packaged by SOT-23, VBR is 5V, and double-line protection can be performed on CMD and CLK.
In the present embodiment, the capacitance of the fifth electrostatic protection device ESD5 is 0.6PF, and the four communication lines are subjected to electrostatic protection.
In summary, the following steps: the utility model discloses a novel interface protection circuit of data interface design of docking station has promoted the anti surge ability of docking station data interface unit circuit, has improved the reliability of product, effectively prevents thunderbolt surge and the static disturbance that the transmission line introduced, fine protection internal Control chip Control IC and main Control MCU for interface communication and interface circuit obtain fine protection, and the overall stability of product obtains guaranteeing.
Has the advantages that:
1. the third electrostatic protection device, the fourth electrostatic protection device and the fifth electrostatic protection device of the circuit of the utility model all have the multi-line protection effect, one device can simultaneously carry out three-way, two-way and four-way surge or electrostatic protection, which can save the physical space of PCB layout and wiring design, is beneficial to reducing the PCB size and weight of the docking station and can embody the characteristics of portable equipment;
2. the fourth electrostatic protection device and the fifth electrostatic protection device of the circuit of the utility model have an ultralow capacitance less than 1PF, can meet the speed requirements of high-speed communication and high-speed SD card reading between the docking station main control MCU and the data conversion IC, avoid the phenomenon of high error rate caused by overlarge capacitance of the device junction during high-speed signal transmission or data reading, and ensure the reliability of the product;
3. through the circuit, the data conversion chip Control IC and the data communication rate of the SD/TF card in the docking station are well protected, and the overall stability of a product is well ensured.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A protection circuit of a docking station data interface comprises a data conversion control chip, a TF data interface and an SD data interface of a docking station; the data conversion control chip is connected with the docking station main control MCU through a VBUS pin, an SD _ Dp pin, an SD _ Dm pin and a GND pin to complete data communication and control; the data conversion control chip is connected with data terminals DAT0, DAT1, DAT2 and DAT3 ports of the TF data interface and the SD data interface through pins D0, D1, D2 and D3 for data transmission; the data conversion control chip is connected with CMD and CLK ports of the TF and SD data interfaces through the CMD and CLK ports and receives and transmits control signals; the data conversion control chip supplies power to the data interface through VDD and GND ports, and is characterized in that:
the electrostatic protection device also comprises a third electrostatic protection device, a fourth electrostatic protection device and a fifth electrostatic protection device;
the third electrostatic protection device is connected between the data conversion Control chip Control IC and the docking station main Control MCU; a pin 4 of the third electrostatic protection device ESD3 is connected with a VBUS wire, and pins 2 and 3 are connected with SD _ Dp and SD _ Dm wires; 1 pin is connected with GND ground wire;
a pin 1 of the fourth electrostatic protection device is connected with a control communication line CMD, a pin 2 is connected with CLK, and a pin 3 is connected with a GND ground wire;
pins 1, 6, 4 and 3 of the fifth electrostatic protection device are respectively connected with data communication lines D1, D0, D3 and D2, and pin 2 is connected with the ground.
2. The protection circuit of claim 1, wherein the third esd protection device is packaged with an SOT-143 package.
3. The protection circuit of claim 1, wherein the fourth esd protection device is packaged with SOT-23 and VBR is 5V.
4. The protection circuit of claim 1, wherein the fifth esd protection device is packaged by DFN2510, VBR is 5V, and capacitance characteristic is ultra-low capacitance less than 1 PF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121447172.5U CN214846701U (en) | 2021-06-28 | 2021-06-28 | Protection circuit of docking station data interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121447172.5U CN214846701U (en) | 2021-06-28 | 2021-06-28 | Protection circuit of docking station data interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214846701U true CN214846701U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121447172.5U Active CN214846701U (en) | 2021-06-28 | 2021-06-28 | Protection circuit of docking station data interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214846701U (en) |
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2021
- 2021-06-28 CN CN202121447172.5U patent/CN214846701U/en active Active
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