CN109347082B

CN109347082B - Anti-static device, terminal and method

Info

Publication number: CN109347082B
Application number: CN201811289358.5A
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-09-15
Anticipated expiration: 2038-10-31
Also published as: CN109347082A

Abstract

The embodiment of the application discloses an anti-static device, a terminal and a method, wherein the device comprises: an interface module configured to generate an enable signal based on an access status between a first power supply of the apparatus and the interface module; the control module is configured to disconnect the interface module from the data processing module if the enable signal is a first enable signal, and the first enable signal is used for representing that the access state is that the first power supply is not accessed to the interface module; and the data processing module is configured to communicate with the interface module through the connection with the interface module.

Description

Anti-static device, terminal and method

Technical Field

The embodiment of the application relates to electronic technology, and relates to but is not limited to an anti-static device, a terminal and a method.

Background

Static electricity has been the biggest threat to the safety of microelectronic devices, especially the wide use of a wide variety of woollen textiles and chemical fabrics, and the range of human activities is enlarged and the complexity of actions is complicated, so that the human body often has very high static voltage. For the exposed charging interfaces of the electronic equipment, when a user touches or approaches the interfaces, the metal parts on the interfaces may generate instantaneous electrostatic induction potential differences, the instantaneous potential differences can reach ten thousand volts, and microelectronic devices connected with the metal parts can be directly punctured or burnt, such as a processor and a power manager connected with the interfaces.

In the existing scheme, an anti-static protection of a charging interface is mainly performed by adding a Transient Voltage Suppressor (TVS) diode, however, the dependency of the scheme on the TVS diode is high, and the charging interface is in an unprotected state due to failure of the TVS diode or abnormal clamping Voltage. And when the abnormal conditions such as the micro short circuit of the interface occur, the probability of the failure of the TVS diode is greatly increased, so that the reliability of the whole charging system is reduced.

Disclosure of Invention

In view of the above, embodiments of the present application provide an anti-static apparatus, a terminal and a method for solving at least one problem in the related art.

The technical scheme of the embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides an anti-static device, where the device includes: the interface module is configured to generate an enabling signal based on an access state between a first power supply of the apparatus and the interface module; the control module is configured to disconnect the interface module from the data processing module if the enable signal is a first enable signal, where the first enable signal is used to indicate that the access state is that the first power supply is not accessed to the interface module; the data processing module is configured to communicate with the interface module through connection with the interface module.

In a second aspect, an embodiment of the present application provides a terminal, which includes the above-mentioned static electricity prevention apparatus.

In a third aspect, an embodiment of the present application provides an anti-static method, where the method is applied to the above anti-static device, and the device includes: the system comprises an interface module, a control module and a data processing module; the method comprises the following steps: generating an enable signal through the interface module based on an access status between a first power supply of the apparatus and the interface module; if the enabling signal is a first enabling signal, the control module disconnects the connection between the interface module and the data processing module, and the first enabling signal is used for representing that the access state is that the first power supply is not accessed to the interface module; and connecting the interface module with the data processing module, so that the data processing module communicates with the interface module through the connection.

In the embodiment of the application, an anti-static device is provided, the device comprises an interface module, a control module and a data processing module, whether the device is connected to a first power supply can be detected through the interface module, namely, an enable signal matched with the power supply connection state is generated and output to the control module, if the enable signal is the first enable signal, namely, the interface module is not connected to the first power supply, the control module is triggered to disconnect the connection between the interface module and the data processing module, so that the safety of devices in the data processing module is protected, and the devices in the data processing module are prevented from being damaged by static electricity on the interface module. And because the interface module is disconnected with the data processing module all the time when the first power supply is not connected, the antistatic reliability of the device is greatly improved.

Drawings

Fig. 1 to 7 are schematic structural diagrams of the antistatic device according to the embodiment of the present application;

FIG. 8 is a schematic view of an implementation process of an anti-static method according to an embodiment of the present application

Fig. 9 is a schematic structural diagram of a switching device according to an embodiment of the present application.

Detailed Description

The technical solution of the present application is further elaborated below with reference to the drawings and the embodiments.

The embodiment of the application provides an antistatic device, which is applied to a terminal, and generally, the terminal can be various types of electronic devices with data interfaces capable of interacting with external devices in the implementation process, for example, the terminal can include a mobile phone, a tablet computer, a desktop computer, a personal digital assistant, a navigator, a digital phone, a video phone, a television, a sensing device, and the like.

An anti-static device is provided in the embodiment of the present application, fig. 1 is a schematic structural diagram of the anti-static device in the embodiment of the present application, and as shown in fig. 1, the device 10 includes a charging interface 11, an anti-static circuit 12, a processor 13, and a power manager 14; the pin D-, the pin D + on the charging interface 11 are connected with the processor 13 to form a first link 111 and a second link 112, respectively, and the pin CC1 and the pin CC2 on the charging interface 11 are connected with the power manager 14 to form a third link 113 and a fourth link 114, respectively; the first circuit 121 of the anti-static circuit 12 has a first TVS diode 1211, a first end of the first TVS diode 1211 is connected to the second link 112, and a second end of the first TVS diode 1211 is grounded; the second circuit 122 of the anti-static circuit 12 has a second TVS diode 1221, a first end of the second TVS diode 1221 is connected to the fourth link 114, and a second end of the second TVS diode 1221 is grounded; a third TVS diode 1231 is disposed on the third circuit 123 of the anti-static circuit 12, a first end of the third TVS diode 1231 is connected to the third link 113, and a second end of the third TVS diode 1231 is grounded;

thus, by utilizing the characteristics of the TVS diode, such as extremely fast response time (sub-nanosecond level) and relatively high surge absorption capability, when two ends of the TVS diode are subjected to transient high energy impact, the TVS diode can change the impedance value between the two ends from high impedance to low impedance at extremely high speed to absorb a transient large current, and clamp the voltage across the TVS diode at a predetermined value, for example, in fig. 1, when the charging interface 11 is not plugged by a data line connected to a power supply, electrostatic charges on the pin D +, the pin CC1, and the pin CC2 of the charging interface 11 are respectively led to the ground through the first circuit 121, the second circuit 122, and the third circuit 123, so as to protect circuit elements (such as the processor 13 and the power manager 14) connected to the pins from the impact of the transient high voltage spike, thereby achieving the purpose of electrostatic protection.

However, the dependence of the esd protection capability of the esd protection device on the TVS diode is high, and once the TVS diode or the clamping voltage is abnormal, the charging interface 11 and the processor 13 and the power manager 14 connected to the charging interface 11 are in an unprotected state, that is, when the charging interface 11 is not plugged into a data line connected to a power supply, the pins D +, D-, CC1 and CC2 on the charging interface 11 are still connected to the processor 13 and the power manager 14, so that when the TVS diode fails, the transient static potential difference generated by the static charge on the pins may directly burn the processor 13 and the power manager 14 through the links from the first link 111 to the fourth link 114. In addition, when the charging interface 11 has abnormal conditions such as micro short circuit, the probability of TVS diode failure will be greatly increased, which greatly reduces the reliability of the antistatic effect of the device 10.

Based on the above-mentioned defects of the device 10, an embodiment of the present application provides another anti-static device, fig. 2 is a schematic structural diagram of the other anti-static device in the embodiment of the present application, as shown in fig. 2, the device 20 includes an interface module 21, a control module 22 and a data processing module 23; wherein,

an interface module 21 configured to generate an enable signal based on an access state between a first power supply of the apparatus 20 and the interface module 21, and output the enable signal to the control module 22;

here, it should be noted that the first power source refers to a power source other than the apparatus, that is, the first power source is not a battery power source in the apparatus, but is a data interface inserted into the interface module 21, and is a power source capable of supplying power to the apparatus, for example, a mobile phone accesses an ac mains power through a power adapter, where the mobile phone is the apparatus and the ac mains power is the first power source; or, the electronic device, which is inserted into the data interface and can exchange data with the apparatus, for example, a mobile phone accesses a notebook computer through a data line, where the notebook computer is the apparatus and the mobile phone is the first power supply, and of course, the notebook computer may also be the first power supply and the mobile phone may also be the apparatus. In short, the type of the first power supply is not limited, and may be ac mains power or other electronic devices that can be connected to the apparatus 20 through the data interface in the interface module 21.

It is understood that, in general, the connection status includes two types, the first type is that the interface module 21 is not connected to the first power supply, that is, the data interface in the interface module 21 is not plugged into the data line connected to the first power supply, and at this time, the interface module 21 generates the first enable signal; the second is that the interface module 21 is connected to the first power supply, that is, a data interface in the interface module 21 is plugged into a data line connected to the first power supply, and at this time, the interface module 21 generates a second enable signal.

The control module 22 is configured to disconnect the interface module 21 from the data processing module 23 if the enable signal is a first enable signal, where the first enable signal is used to indicate that the access state is that the first power supply is not accessed to the interface module 21;

in practice, said first enabling signal and said second enabling signal are two electrical signals having different voltages, which can trigger the control module 22 to open or close the connection between the interface module 21 and the data processing module 23. When said first power supply is not connected to the interface module 21, the first enable signal generated by the interface module 21 can trigger the control module 22 to disconnect the interface module 21 from the data processing module 23, so that when there is static charge on the interface module 21, the transient electrostatic induction potential difference generated by these static charges will not break down or burn out the data processing module 23 disconnected from the interface module 21.

In general, the pins of the data interface in the interface module 21 are all charged, i.e. static charges, such as the pins CC1, CC2, D +, D-on the Type-C interface, which cause electrochemical corrosion if there is water on the pins or the Type-C interface is in a humid environment, so as to increase the electrostatic protection capability of the data interface in the interface module 21, increase the waterproof capability and the corrosion resistance capability of the data interface, in other embodiments, the control module 22 is further configured to: and if the enable signal is the first enable signal, grounding the N pins in the interface module 21 for connecting the data processing module 23, where N is a natural number greater than or equal to 1. For example, the D +, D-, CC1, CC2 pins on the Type-C interface used to communicate with the processor and power manager are grounded by the control module 22, thereby directing the electrostatic charge on these pins to ground.

In other embodiments, the control module 22 is further configured to: if the enable signal is a second enable signal, the connection between the interface module 21 and the data processing module 23 is closed, so that the data processing module 23 communicates with the interface module 21 through the connection, and the second enable signal is used to indicate that the access status is the first power access interface module 21.

A data processing module 23 configured to communicate with the interface module 21 through a connection with the interface module 21.

It should be noted that the data processing module 23 generally includes a processor and a power manager, but the microelectronic device included in the data processing module 23 is not limited herein, and any microelectronic device connected to the pin on the data interface in the interface module 21 is an object of the apparatus for electrostatic protection.

An embodiment of the present invention provides another anti-static device, and fig. 3A is a schematic structural diagram of another anti-static device according to an embodiment of the present invention, and as shown in fig. 3A, the device 30 includes: an interface module 31, a control module 32 and a data processing module 33; the interface module 31 includes a first data interface 311 and a first pull-up circuit 312;

a first pull-up circuit 312 configured to enable one Ground (GND) pin of the first data interface 311 to generate and output a first enable signal having a first voltage to the control module 32 when the first power of the apparatus 30 is not coupled to the first data interface 311;

here, it should be noted that the first data interface, and the second data interface, the third data interface, the fourth data interface, and the fifth data interface described in the following embodiments are only for distinguishing data interfaces in different circuit structures, and these data interfaces may be the same or different. The data interfaces may be data interfaces conforming to corresponding transmission standards, such as Universal Serial Bus (USB) 1.0, USB2.0, USB3.0, and Type-C, and the structure of the data interfaces is not limited.

In fact, the first pull-up circuit is used to pull up the output voltage of the GND pin when the first data interface 311 is not connected to the first power supply, and fix the output voltage at a high level, for example, a first terminal of the first pull-up circuit 312 is connected to a second power supply of the device 30, for example, a voltage supply (VCC) inside the device 30, which is typically 5 volts (Volt, V), and a second terminal of the first pull-up circuit 312 is connected to the GND pin of the first data interface 311, so that, when the first data interface 311 is not connected to the first power source, the first pull-up circuit 312 makes the GND pin output a first voltage greater than a second voltage, which is a high level with respect to the second voltage, thereby triggering the control module 32 to disconnect the first data interface 311 from the data processing module 33, and the N pins of the first data interface 311 connected to the data processing module 33 are grounded. Certainly, when the first data interface 311 is connected to the first power supply, the GND pin is grounded, and the GND pin outputs a second enable signal having a second voltage, that is, the second voltage is 0, so as to trigger the control module 32 to close the connection between the first data interface 311 and the data processing module 33, and at this time, the N pins connected to the data processing module 33 are no longer grounded. It is understood that the first voltage is greater than the second voltage.

The first data interface 311 is configured to trigger the GND pin connected to the first pull-up circuit 312 to generate and output a second enable signal with a second voltage to the control module 32 when the first power is connected to the first data interface 311;

a control module 32 configured to disconnect the first data interface 311 from the data processing module 33 if the enable signal is the first enable signal; if the enable signal is a second enable signal, closing the connection between the first data interface 311 and the data processing module 33, where the second enable signal is used to represent that the access state is that the first power supply is accessed to the first data interface 311;

in other embodiments, the control module 32 is further configured to: if the enable signal is the first enable signal, grounding N pins on the first data interface 311 for connecting the data processing module 33, where N is a natural number greater than or equal to 1. For example, the first data interface 311 is a Type-C interface, and the D +, D-, CC1 and CC2 pins on the Type-C interface for communicating with the processor and the power manager are grounded through the control module, so as to lead static charges on the pins to the ground, thereby increasing the static protection capability of the data interface in the interface module, and increasing the waterproof capability and corrosion resistance capability of the data interface.

And a data processing module 33 configured to communicate with the first data interface 311 through a connection with the first data interface 311.

If the enable signal is the second enable signal, the second enable signal triggers the control module 32 to close the connection between the data processing module 33 and the first data interface 311, so that the data processing module 33 can communicate with the first data interface 311 through the connection with the first data interface 311.

To facilitate understanding of the above embodiments, taking the first data interface as an example of a Type-C interface, as shown in fig. 3B, which shows a circuit structure of the device 30, as can be seen from fig. 3B, the interface module 31 includes a Type-C interface 311 and a first pull-up circuit 312, the control module 32 is a switch device, i.e., a first switch 32, and the data processing module 33 includes a processor 331 and a power manager 332; wherein,

three GND pins on the Type-C interface 311 are directly grounded, another GND pin is connected with an Enable (EN) pin of the first switch 32, and four pins D +, D-, CC1 and CC2 on the Type-C interface 311 are connected with a D on the A side of the first switch 32_A+、D_A-、CC1_A、CC2_AThese four pins are correspondingly connected (e.g., pin D + on the Type-C interface 311 and pin D on the first switch 32_A+ connected); d on side B of the first switch 32_B+、D_B-、CC1_B、CC2_BThese four pins are connected to the processor 331 and the power manager 332, respectively, i.e., pin D_B+ and pin D_BConnected to processor 331, pin CC1_BAnd pin CC2_BTo the power manager 332; the first pull-up circuit 312 has at least one first resistor, the resistance of which is generally set to 10 Kilo-Ohms (K Ω), a first end of the first resistor is connected to the GDN pin, and a second end of the first resistor is connected to the internal supply voltage VCC (generally 5V voltage) of the device 30;

thus, when the Type-C interface 311 is not connected to the first power supply, for example, the data interface of the mobile phone is not plugged by the data line connected to the first power supply, at this time, the GND pin outputs a first Enable signal with a first voltage to the Enable (EN) pin, so as to trigger the first switch 32 to disconnect the D +, D-pins of the Type-C interface 311 from the processor 331 (i.e., disconnect the D + pin of the first switch 32 from the D + pin of the D-pin 32)_A+ and pin D_B+ and pin D_AAnd pin D_B-connection between) and, disconnecting the connection between the CC1, CC2 pins and the power manager 332 on the Type-C interface 311 (also, disconnecting the power manager 332 from the CC1, CC2 pinsI.e. to open the pin CC1 on the first switch 32_AAnd pin CC1_BAnd pin CC2, and_Aand pin CC2_BThe connection therebetween) while connecting the four pins D +, D-, CC1, and CC2 on the Type-C interface 311 to ground;

when the first power is connected to the Type-C interface 311, for example, the data interface of the mobile phone is plugged by the data line connected to the first power, the GND pin of the Type-C interface 311 is grounded, and the GND pin outputs a second enable signal with a second voltage to the EN pin, so as to trigger the first switch 32 to close the connection between the pins D +, D-, CC1, and CC2 of the Type-C interface 311 and the processor 331 and the power manager 332 (i.e., close the four pins D on the a side of the first switch 32)_A+、D_A-、CC1_A、CC2_AFour pins D respectively connected to the B side of the first switch 32_B+、D_B-、CC1_B、CC2_BInter-connection, e.g. closing pin D_A+ and pin D_B+ connect), at this time, the four pins D +, D-, CC1, and CC2 on the Type-C interface 311 are no longer grounded, but are connected to the processor 331 and the power manager 332, respectively, so that the processor 331 and the power manager 322 can communicate with the Type-C interface.

In practical applications, as shown in fig. 3C, the first pull-up circuit 312 further includes at least one diode, wherein an anode of the diode is connected to VCC, and a cathode of the diode is connected to the second end of the first resistor, so that the first pull-up circuit 312 has a power source back-sink prevention capability, and the device on the first pull-up circuit 312 is prevented from being destroyed when the Type-C interface 311 is inserted backwards, for example, if the GND pin of the Type-C interface 311 is connected to the anode of the first power source, and the power Bus (Voltage Bus, VBUS) pin of the Type-C interface 311 is connected to the cathode of the first power source, the GND pin of the Type-C interface 311 may output a large current to destroy the device on the first pull-up circuit 312, and if a diode is added to the first pull-up circuit 312, this phenomenon may be avoided, and the protection circuit is not destroyed.

The embodiment of the present application provides a further anti-static device, and fig. 4A is a schematic structural diagram of the further anti-static device according to the embodiment of the present application, and as shown in fig. 4A, the device 40 includes: an interface module 41, a control module 42 and a data processing module 43; wherein the interface module 41 includes a second data interface 411 and a first pull-down circuit 412;

a first pull-down circuit 412 configured to cause one power pin of the second data interface 411 to generate and output a first enable signal having a third voltage to the control module 42 when the first power of the apparatus 40 is not coupled to the second data interface 411;

here, the power supply pin is generally a pin for accessing the first power supply positive electrode, such as a VBUS pin. The pull-down circuit is used to fix the output voltage of the power pin to a low voltage, for example, a first terminal of the first pull-down circuit 412 is connected to a power pin of the second data interface 411, and a second terminal of the first pull-down circuit 412 is grounded. Thus, when the power pin is not connected to the first power supply, the power pin outputs a first enable signal having a third voltage to the control module 42.

The second data interface 411 is configured to trigger the power pin connected to the first pull-down circuit 412 to generate and output a second enable signal with a fourth voltage to the control module 42 when the first power is connected to the second data interface 411;

it is understood that, if the power pin is connected to the first power supply, the power pin outputs a voltage signal greater than the third voltage, i.e., the fourth voltage is greater than the third voltage.

The control module 42 is configured to disconnect the second data interface 411 from the data processing module 43 if the enable signal is the first enable signal, and connect N pins on the second data interface 411 for connecting the data processing module 43 to ground, where N is a natural number greater than or equal to 1; if the enable signal is the second enable signal, the connection between the second data interface 411 and the data processing module 43 is closed, and at this time, the N pins on the second data interface 411, which are used for connecting the data processing module 43, are not grounded any more, but connected to the data processing module 43;

a data processing module 43 configured to communicate with the second data interface 411 through a connection with the second data interface 411.

To facilitate understanding of the above embodiments, taking the second data interface 411 as a Type-C interface as an example, as shown in fig. 4B, which shows a circuit structure of the device 40, as can be seen from fig. 4B, the interface module 41 includes the Type-C interface 411 and the first pull-down circuit 412, the control module 42 is a switching device, i.e., the second switch 42, and the data processing module 43 includes a processor 431 and a power manager 432; wherein,

four GND pins on the Type-C interface 411 are directly grounded, a second resistor with the resistance value of 30K omega is connected in series with a VBUS pin on the Type-C interface 411, the second end of the second resistor is connected with the EN pin 421 of the second switch 42, and pins D +, D-, CC1, CC2 on the Type-C interface 411 and a pin D on the A side of the second switch 42_A+、D_A-、CC1_A、CC2_ACorresponding connections (e.g., pin D + on the Type-C interface 411 and pin D on the second switch 42)_A+ connected); d on side B of second switch 32_B+、D_B-、CC1_B、CC2_BThese four pins are connected to the processor 431 and the power manager 432, respectively, i.e., pin D_B+ and pin D_BConnected to the processor 431, pin CC1_BAnd pin CC2_BConnected to the power manager 432; the first pull-down circuit 412 is provided with at least one third resistor, the resistance value is generally set to 20K Ω, the first end of the third resistor is connected with the second end of the second resistor, and the second end of the third resistor is grounded;

thus, when the Type-C interface 411 is not connected to the first power supply, for example, the data interface on the mobile phone is not plugged by the data line connected to the first power supply, at this time, since the VBUS pin is grounded, that is, the second end of the third resistor outputs a first enable signal with a third voltage (the third voltage is substantially equal to 0) to the EN pin 421, the second switch 42 is triggered to disconnect the D +, D-pins of the Type-C interface 411 from the processor 431 (that is, disconnect the D + pin and the D-pin of the second switch 42 from each other)_A+ and pin D_B+ and pin D_AAnd pin D_B-and the connection between the CC1 and CC2 pins on the Type-C interface 411 and the power manager 432 (i.e., the CC1 pin on the second switch 42 is disconnected)_AAnd pin CC1_BAnd pin CC2, and_Aand pin CC2_BThe connection therebetween) while connecting the four pins D +, D-, CC1, and CC2 on the Type-C interface 411 to ground;

when the Type-C interface 411 is connected to the first power source, for example, a data interface on a mobile phone is plugged in a data line connected to the first power source, at this time, the VBUS pin of the Type-C interface 411 is connected to the positive electrode of the first power source, and at this time, the second end of the third resistor outputs a second enable signal with a fourth voltage to the EN pin 421, so as to trigger the second switch 42 to close the connection between the four pins D +, D-, CC1, and CC2 on the Type-C interface 411 and the processor 431 and the power manager 432, respectively (that is, close the four pins D on the a side of the second switch 42_A+、D_A-、CC1_A、CC2_AFour pins D respectively connected to the B side of the second switch 42_B+、D_B-、CC1_B、CC2_BInter-connection, e.g. closing pin D_A+ and pin D_B+ connect), at this time, the four pins D +, D-, CC1, and CC2 on the Type-C interface 411 are no longer grounded, but are connected to the processor 431 and the power manager 432, respectively, so that the processor 431 and the power manager 422 can communicate with the Type-C interface.

An embodiment of the present application provides another anti-static device, and fig. 5A is a schematic structural diagram of another anti-static device according to an embodiment of the present application, and as shown in fig. 5A, the device 50 includes: an interface module 51, a control module 52 and a data processing module 53; the interface module 51 includes a third data interface 511, an Over-voltage Protection (OVP) circuit 512, and a second pull-up circuit 513, wherein a power supply pin 5111 of the third data interface 511 is connected to the OVP circuit 512, and the second pull-up circuit 513 is connected to an adaptor detection output ACOK pin on the OVP circuit 512;

a second pull-up circuit 513 configured to enable the ACOK pin to generate and output a first enable signal having a fifth voltage to the control module 52 when the first power supply is not connected to the third data interface 511;

here, the second pull-up circuit 513 functions similarly to the first pull-up circuit 312, and thus, in practical applications, a first terminal of the second pull-up circuit 513 may be connected to the ACOK pin of the OVP circuit 512, and a second terminal of the second pull-up circuit 513 is connected to a second power supply of the apparatus 50.

An OVP circuit 512, configured to enable the ACOK pin to generate and output a second enable signal with a sixth voltage to the control module 52 when the first power is connected to the third data interface 511;

it is understood that the second pull-up circuit is used to fix the output voltage of the ACOK pin at a high level when the first power source is not connected to the third data interface 511, i.e., the fifth voltage is greater than the sixth voltage.

The control module 52 is configured to disconnect the third data interface 511 from the data processing module 53 if the enable signal is the first enable signal, and connect N pins on the third data interface 511, which are used for connecting the data processing module 53, to ground, where N is a natural number greater than or equal to 1; if the enable signal is the second enable signal, the connection between the third data interface 511 and the data processing module 53 is closed, and at this time, the N pins on the third data interface 511, which are used for connecting the data processing module 53, are no longer grounded, but are connected to the data processing module 53;

a data processing module 53 configured to communicate with the third data interface 511 through a connection with the third data interface 511.

To facilitate understanding of the above embodiments, taking USB interfaces other than the Type-C interface as an example, as shown in fig. 5B, which shows a circuit structure of the device 50, it can be seen from fig. 5B that the interface module 51 includes a third data interface 511, an OVP circuit 512 and a second pull-up circuit 513, the control module 52 is a switch device, i.e., a third switch 52, and the data processing module 53 includes a processor 531 and a power manager 532; wherein,

GND pin on third data interface 511Ground, the VBUS pin of the third data interface 511 is connected to the OVP circuit, and the pins D +, D-, CC1, and CC2 of the third data interface 511 and the pin D on the A side of the third switch 52_A+、D_A-、CC1_A、CC2_ACorrespondingly connecting; pin D on side B of third switch 52_B+、D_B-、CC1_B、CC2_BRespectively connected with the processor 531 and the power manager 532; the second pull-up circuit 513 is provided with at least one fourth resistor 5131 of 10K Ω, a first end of the fourth resistor is connected to the ACOK pin of the OVP circuit 512, a second end of the fourth resistor is connected to VCC, and meanwhile, the second end of the fourth resistor is connected to the EN pin of the third switch 52;

thus, when the third data interface 511 does not have the first power, at this time, the ACOK pin is pulled up by the second pull-up circuit 513 to a high level, that is, the ACOK pin outputs a first enable signal with a fifth voltage to the EN pin, thereby triggering the third switch 52 to disconnect the D +, D-pins of the third data interface 511 from the processor 531, and disconnect the CC1, the CC2 pins of the third data interface 511 from the power manager 532, and simultaneously connect the D +, D-, CC1, and the CC2 pins of the third data interface 511 to ground;

when the first power is connected to the third data interface 511, the output voltage of the ACOK pin is low, that is, the ACOK pin outputs a second enable signal having a sixth voltage to the EN pin, so as to trigger the third switch 52 to close the connection between the four pins D +, D-, CC1, and CC2 of the third data interface 511 and the processor 531 and the power manager 532, respectively, and at this time, the pins D +, D-, CC1, and CC2 of the third data interface 511 are no longer grounded, but are connected to the processor 531 and the power manager 532, respectively.

An embodiment of the present application provides another anti-static device, and fig. 6A is a schematic structural diagram of another anti-static device according to an embodiment of the present application, and as shown in fig. 6A, the anti-static device includes: an interface module 61, a control module 62 and a data processing module 63; the interface module 61 includes a fourth data interface 611, a first elastic piece 612 and a second pull-down circuit 613; the first end of the first elastic piece 612 is connected to the power pin 6111 of the fourth data interface 611, or the first end of the first elastic piece 612 is connected to the second power supply of the device 60 (as shown in fig. 6B); a first terminal of the second pull-down circuit 613 is grounded, and a second terminal of the second pull-down circuit 613 is connected to the control module 62;

it should be noted that the first elastic piece 612 is made of a metal material, the first elastic piece 612 has at least one resistor thereon, and a first end of the first elastic piece 612 is fixedly connected to the power pin 6111, for example, the first elastic piece 612 is welded to the power pin 6111. It should also be noted that the second power supply is different from the first power supply, and the second power supply is actually an internal power supply of the device 60, i.e., VCC connected to the device 60.

When the fourth data interface 611 has no plug inserted, the second end of the first elastic piece 612 is in a floating state, so that the first enable signal with the seventh voltage is generated and output to the control module 62 through the second end of the second pull-down circuit 613;

when a plug is inserted into the fourth data interface 611, the first elastic piece 612 is pushed open by the plug, so that the second end of the first elastic piece 612 is connected to the second end of the second pull-down circuit 613, and when the plug is connected to the first power supply, a second enable signal with an eighth voltage is generated and output to the control module 62 through the second end of the first elastic piece 612;

it should be noted that the first elastic piece 612 is generally disposed in the cavity of the fourth data interface 611, so that when the fourth data interface 611 is inserted by a plug, the second end of the first elastic piece 612 can be connected to the second end of the second pull-down circuit 613 after the first elastic piece 612 is pushed open by the plug.

The functions of the control module 62 and the data processing module 63 are similar to those of the control module and the data processing module in the above embodiments, and therefore, the description thereof is omitted.

The embodiment of the present application provides another anti-static device, fig. 7 is a schematic structural diagram of another anti-static device in the embodiment of the present application, and as shown in fig. 7, the device 70 includes: an interface module 71, a control module 72 and a data processing module 73; the interface module 71 includes a fifth data interface 711, a second elastic sheet 712, and a third pull-up circuit 713; a first end of the second elastic piece 712 is connected to a GND pin in the fifth data interface 711, a first end of the third pull-up circuit 713 is connected to a second power supply (i.e., the access power VCC) of the device 70, and a second end of the third pull-up circuit 713 is connected to the control module 72;

when the fifth data interface 711 has no plug inserted, the second end of the second elastic piece 712 is in a floating state, so that the first enable signal with the ninth voltage is generated and output to the control module 72 through the second end of the third pull-up circuit 713;

similarly, the second elastic piece 712 is disposed in the cavity of the fifth data interface 711, so that when the fifth data interface 711 is inserted into the plug, the second end of the second elastic piece 712 can be connected to the second end of the third pull-up circuit 713 after the second elastic piece 712 is pushed open by the plug.

When a plug is inserted into the fifth data interface 711, the second elastic piece 712 is pushed open by the plug, so that the second end of the second elastic piece 712 is connected with the second end of the third pull-up circuit 713, and thus when the plug is connected to the first power supply, a second enable signal with a tenth voltage is generated and output to the control module 72 through the second end of the second elastic piece 712;

the functions of the control module 72 and the data processing module 73 are similar to those of the control module and the data processing module in the above embodiments, and therefore, the description thereof is omitted.

The embodiment of the application provides a terminal, which comprises the antistatic device in any one of the above embodiments.

In addition, an anti-static method is provided in an embodiment of the present application, and the method is applied to the anti-static device described in any of the above embodiments, and fig. 8 is a schematic view of an implementation flow of the anti-static method in the embodiment of the present application, as shown in fig. 8, the method includes steps S801 to S803:

s801, generating an enabling signal through the interface module based on the access state between the first power supply of the device and the interface module;

s802, if the enabling signal is a first enabling signal, disconnecting the connection between the interface module and the data processing module through the control module, wherein the first enabling signal is used for representing that the access state is that the first power supply is not accessed to the interface module;

in other embodiments, the method further comprises: and if the enabling signal is the first enabling signal, grounding N pins used for connecting the data processing module in the interface module through the control module, wherein N is a natural number greater than or equal to 1.

And S803, connecting the interface module with the data processing module, so that the data processing module communicates with the interface module through the connection.

In other embodiments, for step S803, the connecting between the interface module and the data processing module includes: if the enabling signal is a second enabling signal, the control module closes the connection between the interface module and the data processing module, and the second enabling signal is used for representing that the access state is that the first power supply is accessed to the interface module.

In other embodiments, the interface module includes a first data interface and a first pull-up circuit; for step S801, the generating an enable signal through the interface module based on the connection status between the first power source of the apparatus and the interface module includes steps S8011 and S8012:

s8011, when the first power source is not connected to the first data interface, enabling the GND pin to generate and output a first enable signal with a first voltage to a control module through the first pull-up circuit;

s8012, when the first power source is connected to the first data interface, triggering the first data interface to connect to a GND pin of the first pull-up circuit, and generating and outputting a second enable signal having a second voltage to the control module.

In other embodiments, the interface module includes a second data interface and a first pull-down circuit; for step S801, the generating an enable signal through the interface module based on the connection status between the first power source of the apparatus and the interface module includes steps S8013 and S8014:

s8013, when the first power supply is not connected to the second data interface, the first pull-down circuit is configured to enable the power supply pin to generate and output a first enable signal having a third voltage to a control module;

s8014, when the first power source is connected to the second data interface, triggering a power pin of the second data interface, which is connected to the first pull-down circuit, to generate and output a second enable signal having a fourth voltage to the control module.

In other embodiments, the interface module includes a third data interface, an OVP circuit, and a second pull-up circuit; one power supply pin in the third data interface is connected with the OVP circuit, and the second pull-up circuit is connected with an ACOK pin on the OVP circuit; for step S801, the generating an enable signal through the interface module based on the connection status between the first power source of the apparatus and the interface module includes steps S8015 and S8016:

s8015, when the third data interface is not connected to the first power source, enabling the ACOK pin to generate and output a first enable signal with a fifth voltage to a control module through the second pull-up circuit;

s8016, when the first power source is connected to the third data interface, the OVP circuit enables the ACOK pin to generate and output a second enable signal having a sixth voltage to the control module.

In other embodiments, the interface module includes a fourth data interface, a first spring plate, and a second pull-down circuit; the first end of the first elastic sheet is connected with a power pin in the fourth data interface, or the first end of the first elastic sheet is connected with a second power supply of the device; the first end of the second pull-down circuit is grounded, and the second end of the second pull-down circuit is connected with the control module; for step S801, the generating an enable signal through the interface module based on the connection status between the first power source of the apparatus and the interface module includes steps S8017 and S8018:

s8017, when no plug is inserted into the fourth data interface, the second end of the first elastic sheet is in a floating state, so that a first enable signal having a seventh voltage is generated and output to the control module through the second end of the second pull-down circuit;

s8018, when a plug is inserted into the fourth data interface, the first elastic sheet is pushed open by the plug, so that the second end of the first elastic sheet is connected to the second end of the second pull-down circuit, and when the plug is connected to the first power supply, a second enable signal having an eighth voltage is generated and output to the control module through the second end of the first elastic sheet.

In other embodiments, the interface module includes a fifth data interface, a second elastic sheet, and a third pull-up circuit; a first end of the second elastic sheet is connected with a GND pin in the fifth data interface, a first end of the third pull-up circuit is connected with a second power supply of the device, and a second end of the third pull-up circuit is connected with the control module; for step S801, the generating an enable signal through the interface module based on the connection status between the first power source of the apparatus and the interface module includes steps S8019 and S8100:

s8019, when the fifth data interface has no plug inserted, the second end of the second elastic sheet is in a floating state, so as to generate and output a first enable signal having a ninth voltage to the control module through the second end of the third pull-up circuit;

and S8100, when a plug is inserted into the fifth data interface, the second elastic sheet is jacked open through the plug, so that the second end of the second elastic sheet is connected with the second end of the third pull-up circuit, and when the plug is communicated with the first power supply, a second enabling signal with a tenth voltage is generated and output to the control module through the second end of the second elastic sheet.

In the above embodiments, a plurality of anti-static devices and anti-static methods are provided, and the charging interface (i.e. data interface) generally includes four pins, i.e. D +, D-, CC1 and CC2, which are outside the terminal, so that the processor and the power manager are easily damaged by static electricity. This application embodiment is through not connecing under the condition of charging wire (promptly do not insert under the condition of first power), protect external port such as USB interface to increase the antistatic ability of the interface that charges, improve the reliability of product.

The device 10 shown in fig. 1 mainly carries out anti-static protection by adding a TVS diode, a commonly used TVS tube has one-way and two-way, and the TVS diode is connected to a signal pin of a charging interface, thereby playing a role of anti-static. However, the device has high dependency on the TVS diode, and the charging interface is in an unprotected state due to the failure of the TVS diode or abnormal clamping voltage. Especially, under abnormal conditions such as a slightly short interface, the probability of failure of the TVS diode is greatly increased, which reduces the reliability of the whole charging system.

The anti-static devices shown in fig. 2 to 7 can further increase the protection capability of the charging interface on the basis of the device 10, and improve the anti-static property and reliability of the charging interface, and these anti-static devices and anti-static methods are mainly applied to charging devices with data transmission functions, such as mobile terminals and tablet computers.

For example, in the anti-static device shown in fig. 3B, when the first power supply is not connected to the first power supply, one GND pin of the 4 GND pins is not grounded, but is used for signal determination, and a pull resistor and a diode are added outside the GND pin, where the diode is optional, and the element has the function of preventing power supply from flowing backwards. When the first switch 32 is at logic high, that is, when the first enable signal is received, the pins D +, D-, CC1, and CC2 on the Type-C interface 311 are disconnected from the processor 331 and the power manager 332, and the pins D +, D-, CC1, and CC2 are grounded, so that the antistatic capability of the charging interface is enhanced. When the first switch 32 is logic low, that is, when the first switch 32 receives the second enable signal, the D +, D-, CC1, and CC2 of the charging interface are correspondingly connected to the processor and the power manager, so that the communication function is normal and the normal operation is possible.

Generally, the control module is a switch device, and the structure of the switch device is schematically shown in fig. 9, i.e. D on the side a of the switch device_AThe + pin triggers D on side a at logic high (i.e., the EN pin of the switching device inputs a high voltage, e.g., the first voltage, the fifth voltage, the ninth voltage)_A+ pin grounding; at logic low (i.e. the EN pin of the switching device inputs a low voltage, such as the second voltage, the sixth voltage, the tenth voltage), and D on the B side of the switching device_B+ pin connection. Other pins D on the switching device_A-、CC1_A、CC2_AThe same is true.

If the logic of the switching device is reversed, i.e. D on the A side of the switching device_AThe + pin triggers D on side A when logic low (i.e. the EN pin of the switching device inputs a low voltage, such as the third voltage and the seventh voltage)_A+ pin grounding; at logic high (i.e. the EN pin of the switching device inputs a high voltage, e.g. the fourth voltage, the eighth voltage), and D on the B side of the switching device_B+ pin connection. Other pins D on the switching device_A-、CC1_A、CC2_AThe same is true. For example, as shown in fig. 4B, in the apparatus 40, a VBUS pin of the second data interface 411 may be used as a switch enable control, and when a charging line is electrically plugged, the enable pin is at a high level, otherwise, the enable pin is at a low level.

For an interface that is not of Type-C, the mode shown in fig. 5B may be adopted, that is, when the VBUS pin is powered on, the ACOK pin of the OVP protection IC outputs a low level, and when the VBUS is not powered on, the ACOK pin outputs a high level due to external pull-up. When the switch enables to be the high level, the signal ground connection of interface end charges, when the switch enables to be the low level, the connection is established to both ends signal about, can normal communication.

The anti-static device and the anti-static method provided by the embodiment of the application can increase the static protection capability of the charging interface; the pins of CC1, CC2, D +, D-are electrified to increase the waterproof capability and corrosion resistance of the charging interface, if water enters, electrochemical corrosion can be caused, the direct grounding in the embodiment of the application does not have the problem, the direct grounding is not in conflict with the conventional scheme (such as the device 10) in the past, and the direct grounding is compatible with the conventional scheme, for example, the pins of D +, D-, CC1 and CC2 of the Type-C interface 311, and TVS diodes are connected.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An antistatic device, characterized in that it comprises: the system comprises an interface module, a control module and a data processing module; wherein,

the interface module comprises N pins for connecting the data processing module, wherein N is an integer greater than 0; the interface module further comprises a plurality of other pins except the N pins, and one pin of the plurality of other pins is connected with an enabling pin of the control module; a pull-up circuit or a pull-down circuit is arranged between the connection of the pin and the enable pin; the pull-up circuit and the pull-down circuit are configured to enable the pin to generate and output an enable signal to the enable pin based on an access state between a first power supply of the device and the interface module;

the side A and the side B of the control module are respectively provided with the N pins, the N pins on the side A are correspondingly connected with the N pins of the interface module, and the N pins on the side B are correspondingly connected with the pins on the data processing module; the enable pin is configured to trigger the control module to disconnect the N pins of the a side and the N pins of the B side to disconnect the connection between the interface module and the data processing module and to close the connection between the N pins of the a side and a ground line to ground the N pins of the interface module so as to ensure that the data processing module is not damaged by static electricity if the enable signal is a first enable signal, and the first enable signal is used for indicating that the connection state is that the first power supply is not connected to the interface module;

the data processing module is configured to communicate with the interface module through connection with the N pins of the interface module.

2. The apparatus of claim 1, wherein the enable pin is further configured to:

if the enabling signal is a second enabling signal, triggering the control module to disconnect the connection between the N pins of the side A and a ground wire and close the connection between the N pins of the side A and the N pins of the side B so as to close the connection between the interface module and the data processing module, so that the data processing module communicates with the interface module through the connection, and the second enabling signal is used for representing that the access state is that the first power supply is accessed into the interface module.

3. The apparatus of claim 2, wherein the interface module comprises a first pull-up circuit and a first data interface having the plurality of other pins and the N pins, the one pin being a Ground (GND) pin of the plurality of other pins; wherein,

the first pull-up circuit is configured to enable the GND pin to generate and output a first enable signal with a first voltage to the enable pin when the first power supply is not connected to the first data interface;

the first data interface is configured to trigger the GND pin to generate and output a second enable signal with a second voltage to the enable pin when the first power supply is connected to the first data interface.

4. The apparatus of claim 2, wherein the interface module comprises a first pull-down circuit and a second data interface having the plurality of other pins and the N pins, the one pin being a power pin of the other pins; wherein,

the first pull-down circuit is configured to enable the power supply pin to generate and output a first enable signal with a third voltage to the enable pin when the first power supply is not connected to the second data interface;

the second data interface is configured to trigger the power supply pin to generate and output a second enable signal with a fourth voltage to the enable pin when the first power supply is connected to the second data interface.

5. The apparatus of claim 2, wherein the plurality of other pins includes a power supply pin and an adapter current sense output (ACOK) pin, wherein the one pin is the ACOK pin, and wherein the interface module comprises a second pull-up circuit, an over-voltage protection (OVP) circuit having the ACOK pin, and a third data interface having the power supply pin and the N pins; the power supply pin is connected with the OVP circuit, and the second pull-up circuit is arranged between the connection of the enable pin and the ACOK pin;

the second pull-up circuit is configured to enable the ACOK pin to generate and output a first enable signal with a fifth voltage to the enable pin when the first power supply is not connected to the third data interface;

the OVP circuit is configured to enable the ACOK pin to generate and output a second enable signal having a sixth voltage to the enable pin when the first power supply is connected to the third data interface.

6. A terminal, characterized in that it comprises an antistatic device according to any one of claims 1 to 5.

7. An antistatic method applied to the antistatic device according to any one of claims 1 to 5, the device comprising: the system comprises an interface module, a control module and a data processing module; wherein: the interface module comprises N pins for connecting the data processing module, wherein N is an integer greater than 0; the interface module further comprises a plurality of other pins except the N pins, and one pin of the plurality of other pins is connected with an enabling pin of the control module; a pull-up circuit or a pull-down circuit is arranged between the connection of the pin and the enable pin;

the side A and the side B of the control module are respectively provided with the N pins, the N pins on the side A are correspondingly connected with the N pins of the interface module, and the N pins on the side B are correspondingly connected with the pins on the data processing module;

the method comprises the following steps:

generating and outputting an enable signal to the enable pin through the pull-up circuit or the pull-down circuit based on an access state between a first power supply of the device and the interface module;

if the enable signal is a first enable signal, triggering the control module to disconnect the N pins of the a side and the N pins of the B side through the enable pin to disconnect the connection between the interface module and the data processing module and close the connection between the N pins of the a side and a ground line to ground the N pins of the interface module, thereby ensuring that the data processing module is not damaged by static electricity, wherein the first enable signal is used for representing that the access state is that the first power supply is not accessed to the interface module;

connecting the data processing module to the N pins of the interface module, thereby enabling the data processing module to communicate with the interface module through the connection.