CN210490459U - TYPE-C interface protection circuit and device - Google Patents
TYPE-C interface protection circuit and device Download PDFInfo
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- CN210490459U CN210490459U CN201921426278.XU CN201921426278U CN210490459U CN 210490459 U CN210490459 U CN 210490459U CN 201921426278 U CN201921426278 U CN 201921426278U CN 210490459 U CN210490459 U CN 210490459U
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Abstract
The embodiment of the utility model discloses TYPE-C interface protection circuit and device, including having the voltage protection module of predetermineeing the withstand voltage value, voltage protection module establishes ties between TYPE-C conversion chip and TYPE-C interface, voltage protection module is used for preventing damage during signal line excessive pressure or the short circuit of TYPE-C interface TYPE-C conversion chip, consequently for prior art, the embodiment of the utility model provides a through establish ties between TYPE-C interface and TYPE-C conversion chip have the voltage protection module of predetermineeing the withstand voltage value for also can not cause the high-pressure damage of signal line when taking place to pull out to insert off normal or PIN foot production burr at probability, effectively protected the safe handling of rear end conversion chip and whole equipment.
Description
Technical Field
The utility model relates to a data interface technical field especially relates to a TYPE-C interface protection circuit and device.
Background
The design principle of the TYPE-C interface (also called USB-C interface) is that a hardware interface specification of a Universal Serial Bus (USB) is adopted, the TYPE-C interface is commonly used by consumers at present, the full-function TYPE-C scheme comprises three functions of charging, data transmission and display, the situations of probability deviation or interface burr generation and the like can occur due to frequent use, and the voltage range of a power PIN PIN is far larger than the withstand voltage value of an adjacent signal line, so when the probability deviation is pulled out or the PIN PIN burr generation occurs, overvoltage or short circuit damage is easily caused, the signal line and a rear-end conversion chip are damaged, and equipment is permanently damaged.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the embodiment of the utility model provides a TYPE-C interface protection circuit and device aims at solving the problem that the condition such as the easy signal line excessive pressure of taking place of TYPE-C interface among the prior art or short circuit caused equipment damage.
The utility model discloses the first aspect of embodiment provides a TYPE-C interface protection circuit, including the voltage protection module that has preset withstand voltage value, voltage protection module establishes ties between TYPE-C conversion chip and TYPE-C interface, voltage protection module is used for preventing damage during the signal line excessive pressure of TYPE-C interface or short circuit TYPE-C conversion chip.
Optionally, the preset withstand voltage value is greater than the maximum voltage value of a VBUS signal line of the TYPE-C interface.
Optionally, the voltage protection module includes a protection chip, a CC1 terminal and a CC2 terminal of the protection chip are both connected to the CC signal terminal of the TYPE-C conversion chip, and an HSD1 terminal and an HSD2 terminal of the protection chip are both connected to the SBU signal terminal of the TYPE-C conversion chip; the end C _ CC1 and the end C _ CC2 of the protection chip are both connected with the CC signal line of the TYPE-C interface, and the end C _ HSD1 and the end C _ HSD2 of the protection chip are both connected with the SBU signal line of the TYPE-C conversion chip.
Optionally, the TYPE-C interface protection circuit further includes a pull-down module, and the pull-down module is connected to the OEB terminal of the protection chip.
Optionally, the TYPE-C interface protection circuit further includes a pull-up module, and the pull-up module is connected to the INTB terminal of the protection chip.
Optionally, the TYPE-C interface protection circuit further includes a filtering module, and the filtering module is connected to the VBIAS end of the protection chip.
Optionally, the pull-down module includes a first resistor, one end of the first resistor is connected to the OEB end of the protection chip, and the other end of the first resistor is grounded.
Optionally, the pull-up module includes a second resistor, one end of the second resistor is connected to the + V3P3A power supply terminal, and the other end of the second resistor is connected to the INTB terminal of the protection chip.
Optionally, the filtering module includes a third resistor and a capacitor, one end of the third resistor and one end of the capacitor are both connected to the VBIAS end of the protection chip, and the other end of the third resistor and the other end of the capacitor are both grounded.
The embodiment of the utility model provides a second aspect provides a TYPE-C interface protection device, including the PCB board, be provided with on the PCB board as above TYPE-C interface protection circuit.
The embodiment of the utility model provides an among the technical scheme, TYPE-C interface protection circuit is including having the voltage protection module of predetermineeing the withstand voltage value, voltage protection module establishes ties between TYPE-C conversion chip and TYPE-C interface, voltage protection module is used for preventing damage during signal line excessive pressure or the short circuit of TYPE-C interface TYPE-C conversion chip, consequently for prior art, the embodiment of the utility model provides a through establish ties between TYPE-C interface and TYPE-C conversion chip have the voltage protection module of predetermineeing the withstand voltage value for also can not cause the high-pressure damage of signal line when taking place to pull out to insert off normal or PIN foot production burr at probability, effectively protected the safe handling of rear end conversion chip and whole equipment.
Drawings
Fig. 1 is a block diagram of a TYPE-C interface protection circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of the TYPE-C interface protection circuit provided by the embodiment 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 in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
Please refer to fig. 1 and fig. 2, an embodiment of the present invention provides a TYPE-C interface protection circuit and TYPE-C conversion chip and TYPE-C interface connection, which includes a voltage protection module 10, the voltage protection module 10 is connected in series between the TYPE-C conversion chip and the TYPE-C interface, and the voltage protection module 10 has a preset withstand voltage value, which is used to prevent the signal line of the TYPE-C interface from damaging the TYPE-C conversion chip when an overvoltage or a short circuit occurs.
In this embodiment, through establish ties one voltage protection module 10 that has predetermined withstand voltage value between TYPE-C conversion chip and TYPE-C interface, make TYPE-C interface even take place to pull out accidentally in the frequent use in-process and insert the off normal or when PIN foot produces the burr and leads to signal line excessive pressure, because voltage protection module 10 has predetermined withstand voltage value, the withstand voltage value of signal line improves greatly, can not cause the high-voltage damage of signal line, effectively avoided the TYPE-C conversion chip that causes because the short circuit of signal line to burn out, make whole equipment can normally use for a long time.
Further, the preset withstand voltage value is larger than the maximum voltage value of a VBUS signal line of the TYPE-C interface. In this embodiment, the power PIN of the TYPE-C interface is a VBUS signal line, and the voltage range thereof is between 5V and 20V, that is, the maximum voltage value is usually 20V, in order to ensure the protection capability of the voltage protection module 10, the preset voltage value of the voltage protection module 10 needs to be greater than the voltage value of the power PIN, that is, the VBUS signal line, and is preferably 24V in this embodiment, so that when the VBUS signal line contacts an adjacent signal line, because the voltage protection module 10 whose withstand voltage value is greater than the power voltage is connected in series, the withstand voltage value of the adjacent signal line is improved, and the normal use of the device is effectively protected.
In specific implementation, the voltage protection module 10 includes a protection chip U1, a CC1 end and a CC2 end of the protection chip U1 are both connected to a CC signal end of the TYPE-C conversion chip, and an HSD1 end and an HSD2 end of the protection chip U1 are both connected to an SBU signal end of the TYPE-C conversion chip; the end C _ CC1 and the end C _ CC2 of the protection chip U1 are both connected with a CC signal line of the TYPE-C interface, and the end C _ HSD1 and the end C _ HSD2 of the protection chip U1 are both connected with an SBU signal line of the TYPE-C conversion chip. In this embodiment, protection chip U1 adopts the protection chip U1 that the model is WS3219Q, and its inside SBU, the withstand voltage value of CC signal line can reach 24V, of course, in other embodiments, also can adopt other protection chips U1 that have the same function, specifically can select according to the withstand voltage value demand, the utility model discloses do not limit to this.
In the specific implementation, the voltage range of the power PIN PIN of the TYPE-C interface, namely the VBUS signal line, is between 5V and 20V, the SBU and CC signal lines adjacent to the VBUS signal line have the voltage withstanding value below 7V, when the signal contact voltage exceeds 7V and above 5V, the PIN PIN can be burnt out, due to the high plugging and unplugging use frequency of the TYPE-C interface, the probability plugging and unplugging deviation or the PIN PIN generates burrs after multiple plugging and unplugging, so that the VBUS can possibly contact with the adjacent SBU and CC signal line to cause the burning out of the SBU and CC signal line and cause the permanent damage of equipment, the utility model discloses a protective chip U1 is connected in series on the SBU and C signal line, the voltage withstanding value of the SBU and CC signal line in the protective chip U1 can reach 24V or above, therefore, when the SBU and CC signal line of the TYPE-C interface contacts with the VBUS signal line, the voltage withstanding value of the protective chip U1 is high enough, the burning out of the TYPE-C conversion chip at the rear end caused by the short circuit of the SBU, the CC signal wire and the VBUS signal wire can be completely avoided, and the permanent damage of the equipment can not be caused.
Further, the TYPE-C interface protection circuit further includes a pull-down module 20, the pull-down module 20 is connected to the OEB end of the protection chip U1, specifically, the pull-down module 20 includes a first resistor R1, one end of the first resistor R1 is connected to the OEB end of the protection chip U1, and the other end of the first resistor R1 is grounded, in this embodiment, the OEB end of the protection chip U1 is reliably grounded through the first resistor R1, and is maintained at a low level, so that normal operation of the chip is ensured.
Further, the TYPE-C interface protection circuit further includes a pull-up module 30, the pull-up module 30 is connected to the INTB end of the protection chip U1, specifically, the pull-up module 30 includes a second resistor R2, one end of the second resistor R2 is connected to the + V3P3A power supply end, the other end of the second resistor R2 is connected to the INTB end of the protection chip U1, in this embodiment, the clamp of the INTB end of the protection chip U1 is at a high level through the second resistor R2, so that stable signal at the chip control port and stable operation of the auxiliary circuit are ensured.
Furthermore, the TYPE-C interface protection circuit further includes a filter module 40, the filter module 40 is connected to the VBIAS end of the protection chip U1, specifically, the filter module 40 includes a third resistor R3 and a capacitor C1, one end of the third resistor R3 and one end of the capacitor C1 are both connected to the VBIAS end of the protection chip U1, and the other end of the third resistor R3 and the other end of the capacitor C1 are both grounded. In this embodiment, a third resistor R3 and a capacitor C1 are disposed at a bias voltage end, namely, a VBIAS end, of the protection chip U1 to filter the bias voltage, so as to obtain a smooth and stable bias voltage.
The above is the embodiment of the utility model provides an in TYPE-C interface protection circuit describe, it is following right the utility model provides an in TYPE-C interface protection device describe, the embodiment of the utility model provides an in TYPE-C interface protection device an embodiment includes the PCB board, be provided with on the PCB board as above TYPE-C interface protection circuit, because the above has been right TYPE-C interface protection circuit has carried out detailed description, and this department does not describe repeatedly.
To sum up, the embodiment of the utility model provides an among the technical scheme, TYPE-C interface protection circuit is including having the voltage protection module of predetermineeing the withstand voltage value, voltage protection module establishes ties between TYPE-C conversion chip and TYPE-C interface, voltage protection module is used for preventing damage during signal line excessive pressure or the short circuit of TYPE-C interface TYPE-C conversion chip, consequently for prior art, the embodiment of the utility model provides a through establish ties between TYPE-C interface and TYPE-C conversion chip and have the voltage protection module of predetermineeing the withstand voltage value for can not cause the high-pressure damage of signal line when taking place to pull out at probability and insert off normal or PIN foot production burr, effectively protected the safe handling of rear end conversion chip and whole equipment.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a TYPE-C interface protection circuit, its characterized in that, including the voltage protection module that has the withstand voltage value of predetermineeing, the voltage protection module establishes ties between TYPE-C conversion chip and TYPE-C interface, the voltage protection module is used for preventing damage during signal line excessive pressure or the short circuit of TYPE-C interface TYPE-C conversion chip.
2. The TYPE-C interface protection circuit of claim 1, wherein the preset withstand voltage value is greater than a maximum voltage value of a VBUS signal line of the TYPE-C interface.
3. The TYPE-C interface protection circuit of claim 1, wherein the voltage protection module comprises a protection chip, wherein a CC1 terminal and a CC2 terminal of the protection chip are both connected with a CC signal terminal of the TYPE-C conversion chip, and an HSD1 terminal and an HSD2 terminal of the protection chip are both connected with an SBU signal terminal of the TYPE-C conversion chip; the end C _ CC1 and the end C _ CC2 of the protection chip are both connected with the CC signal line of the TYPE-C interface, and the end C _ HSD1 and the end C _ HSD2 of the protection chip are both connected with the SBU signal line of the TYPE-C conversion chip.
4. The TYPE-C interface protection circuit of claim 3, further comprising a pull-down module, wherein the pull-down module is connected to the OEB terminal of the protection chip.
5. The TYPE-C interface protection circuit of claim 3, further comprising a pull-up module, wherein the pull-up module is connected to the INTB terminal of the protection chip.
6. The TYPE-C interface protection circuit of claim 3, further comprising a filter module, wherein the filter module is connected to the VBIAS terminal of the protection chip.
7. The TYPE-C interface protection circuit of claim 4, wherein the pull-down module comprises a first resistor, one end of the first resistor is connected to the OEB end of the protection chip, and the other end of the first resistor is grounded.
8. The TYPE-C interface protection circuit of claim 5, wherein the pull-up module comprises a second resistor, one end of the second resistor is connected to the + V3P3A power supply terminal, and the other end of the second resistor is connected to the INTB terminal of the protection chip.
9. The TYPE-C interface protection circuit of claim 6, wherein the filter module comprises a third resistor and a capacitor, one end of the third resistor and one end of the capacitor are both connected to the VBIAS end of the protection chip, and the other end of the third resistor and the other end of the capacitor are both grounded.
10. A TYPE-C interface protection device comprising a PCB board, wherein the TYPE-C interface protection circuit of any one of claims 1 to 9 is disposed on the PCB board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921426278.XU CN210490459U (en) | 2019-08-30 | 2019-08-30 | TYPE-C interface protection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921426278.XU CN210490459U (en) | 2019-08-30 | 2019-08-30 | TYPE-C interface protection circuit and device |
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| Publication Number | Publication Date |
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| CN210490459U true CN210490459U (en) | 2020-05-08 |
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| CN201921426278.XU Active CN210490459U (en) | 2019-08-30 | 2019-08-30 | TYPE-C interface protection circuit and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472340A (en) * | 2021-06-11 | 2021-10-01 | 上海南芯半导体科技有限公司 | USB Type-C/PD communication interface circuit and control method thereof |
-
2019
- 2019-08-30 CN CN201921426278.XU patent/CN210490459U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472340A (en) * | 2021-06-11 | 2021-10-01 | 上海南芯半导体科技有限公司 | USB Type-C/PD communication interface circuit and control method thereof |
| CN113472340B (en) * | 2021-06-11 | 2023-11-21 | 上海南芯半导体科技股份有限公司 | Interface circuit for USB Type-C/PD communication and control method thereof |
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