CN205507681U - System protection circuit for preventing high-voltage signal impact - Google Patents
System protection circuit for preventing high-voltage signal impact Download PDFInfo
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- CN205507681U CN205507681U CN201620254990.6U CN201620254990U CN205507681U CN 205507681 U CN205507681 U CN 205507681U CN 201620254990 U CN201620254990 U CN 201620254990U CN 205507681 U CN205507681 U CN 205507681U
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Abstract
A system protection circuit for preventing high voltage signal impact comprises a switch unit, an embedded controller, a platform path controller and a logic unit. The switch unit is electrically connected to the first USB connection port and is used for transmitting working power with an external USB device. The embedded controller is electrically connected to the switch unit and is used for sending a USB power supply closing signal to the switch unit. The platform path controller is electrically connected with the embedded controller. The logic unit is electrically connected to the first USB connection port to receive a data signal transmitted by a second USB connection port through the first USB connection port, and when the logic unit detects that the data signal is a high-voltage signal, the logic unit drives the platform path controller to control the embedded controller to send a USB power supply closing signal to the switch unit so as to stop supplying power to the external USB device.
Description
Technical field
This utility model relates to the system protection circuit of a kind of anti-high-voltage signal impact, utilizes logical block to judge whether data signal is high-voltage signal particularly to one, uses the system protection circuit preventing high-voltage signal from impacting system.
Background technology
In general, the computer apparatus such as desktop computer and notebook computer the most all can be provided with usb connecting port to be connected the various formula USB device that connects for user, such as USB flash disk, portable power source, external hard drive, earphone or mike etc., and the circumscribed USB device of the overwhelming majority is the most all the electric power be dependent on computer apparatus and provided by usb connecting port operates, but still have the circumscribed USB device of minority built-in can be built-in with power supply, such as there is the USB flash disk of OTG function.
The most widely used USB interface is mostly based on the standard of USB2.0, the most gradually towards the standard evolution of USB3.0；But, no matter it is which kind of standard or specification, the adapter of USB device all can have the basic contacts such as power supply contact (VBUS), electronegative potential data transmission contact (D-), high potential data transmission contact (D+) and ground contact.
From the above, owing to the technological difficulty of circumscribed USB device is the highest, the most small-sized factory also can produce, and utilize the application of USB interface the broadest, be seen everywhere circumscribed USB device miscellaneous the most on the market, the most therefore the quality causing circumscribed USB device is uneven, probably cause power supply contact to connect with data transmission contact and form short circuit during fabrication because of failure welding, make user when by circumscribed USB device socket connection in the usb connecting port of computer apparatus, can be because voltage recharges to system via data transmission contact, and then make system failure shutdown or make usb connecting port lose efficacy.
Referring to Figure 1A and Figure 1B, Figure 1A and Figure 1B is to show the system schematic that the computer apparatus of prior art is connected to external USB devices.As it can be seen, a computer apparatus PA100 comprises one first usb connecting port PA1, a switch element PA2, a power subsystem PA3, a processing unit PA4 and a circuit protection unit PA5.First usb connecting port PA1 comprises one first power pin PA11, one first low-potential signal pin PA12, one first high potential signal pin PA13 and one first ground connection pin PA14.Switch element PA2 is electrically coupled to the first power pin PA11; power subsystem PA3 is electrically coupled to switch element PA2; processing unit PA4 is electrically coupled to the first low-potential signal pin PA12 and the first high potential signal pin PA13, and circuit protection unit PA5 is electrically coupled to switch element PA5 and the first power pin PA11.
Wherein, first usb connecting port PA1 is the one second usb connecting port PA201 being connected to an external USB devices PA200, and the second usb connecting port PA201 includes a second source pin PA2011, one second low-potential signal pin PA2012, one second high potential signal pin PA2013 and one second ground connection pin PA2014.And external USB devices PA200 also includes a built-in power PA202 and being electrically connected at second source pin PA2011 and is electrically connected at the second low-potential signal pin PA2012 and data module PA203 of the second high potential signal pin PA2013.
nullFrom the above，Due in existing computer apparatus PA100，Only it is provided with the circuit protection unit PA5 for preventing external USB devices PA200 from inversely being backwashed by the first power pin PA11 electric current，Therefore can only prevent switch element PA2 from being impacted by backward current，But，In practice，External USB devices PA200 sometimes can be bad because of design、Quality is bad or is caused second source pin PA2011 short circuit to be connected to the second high potential signal pin PA2013 or the second low-potential signal pin PA2012 by artificial improper use，Electric power that the first power pin PA11 provided by second source pin PA2011 or the electric power that built-in power PA202 is provided is caused to be sent to the second high potential signal pin PA2013 or the second low-potential signal pin PA2012，Cause being sent to processing unit PA4 with high-tension data signal by the first high potential signal pin PA13 or the first low-potential signal pin PA12，And then make processing unit PA4 be damaged by impacting with high pressure.
Utility model content
Because application USB interface is the most universal as the circumscribed USB device connecting transmission means, cause the circumscribed USB device that is seen everywhere on the market, but the quality of these circumscribed USB device differs, the circuit of some circumscribed USB device there may be poorly designed problem, or the problem resulting in short circuit because of failure welding, but these problems from outward appearance and cannot be seen to be no existence, must wait until that user could find after circumscribed USB device being connected with computer apparatus, but the most often because of the problem that circuit design is bad or contact is short-circuit, make data transmission contact can transmit with high-tension signal, and then cause the system failure of computer apparatus；Edge this; in order to solve when computer apparatus is connected to bad circumscribed USB device; can be because system receives the problem causing fault with high-tension data signal; the main purpose of creator of the present utility model is to create the system protection circuit of a kind of anti-high-voltage signal impact, to prevent from, with high-tension data signal, the system of computer apparatus is caused damage by system protection circuit.
This utility model is for solving problem of the prior art; the necessary technology means used are to provide the system protection circuit of a kind of anti-high-voltage signal impact; it is disposed in a computer apparatus; computer apparatus has one first usb connecting port; first usb connecting port comprises one first power pin, one first low-potential signal pin and one first high potential signal pin, and system protection circuit comprises a switch element, an embedded controller, a platform path controller and a logical block.
Switch element is electrically coupled to the first power pin of the first usb connecting port, and when one second usb connecting port of an external USB devices butts up against the first usb connecting port, in order to carry out the transmission of a power for operation with external USB devices.Embedded controller is electrically coupled to switch element, and in order to send a USB power source supply shutdown signal to switch element, use when the first usb connecting port is electrically connected at external USB devices, make switch element stop power supply to external USB devices according to USB power source supply shutdown signal；Platform path controller is electrically coupled to embedded controller；Logical block is electrically coupled to the first usb connecting port, the first low-potential signal pin and the first high potential signal pin, to receive, by the first usb connecting port, the data signal that the second usb connecting port is transmitted, and when detecting that data signal is a high-voltage signal, send a power-off signal to platform path controller, make platform path controller control embedded controller send out USB power source supply shutdown signal to switch element, and then make switch element according to USB power source supply shutdown signal stop power supply to external USB devices.
The attached technological means derived by above-mentioned necessary technology means is, computer apparatus also has a processing unit, embedded controller is also electrically connected at processing unit, and embedded controller also sends a system closedown signal to processing unit when receiving power-off signal, processing unit is made to carry out closing machine operation according to system closedown signal.
The attached technological means derived by above-mentioned necessary technology means is, also comprise an alarm unit, alarm unit is electrically coupled to embedded controller, and embedded controller more sends an alarm sounds signal to alarm unit when receiving power-off signal, alarm unit is made to send a notice alarm according to alarm sounds signal.Preferably, notice alarm comprises an audio alarm or a light alarm.
The attached technological means derived by above-mentioned necessary technology means is, computer apparatus is for a notebook computer.
As mentioned above, owing to the product of existing circumscribed USB device is numerous, but from the outward appearance of product and cannot effectively to pick out the quality of circumscribed USB device be bad, therefore when user runs into power pin with the circumscribed USB device that signal pin is short-circuit, the system of computer apparatus likely can receive with high-tension data signal, causes the system damage of computer apparatus；Compared to this; the system protection circuit of anti-high-voltage signal provided by the utility model impact; receive, by usb connecting port, the data signal that the second usb connecting port is transmitted mainly by logical block; and when detecting that data signal is a high-voltage signal; order about switch element to stop power supply to external USB devices, effectively avoid system to receive with high-tension data signal.
The specific embodiment that this utility model is used, will be further described by below example and accompanying drawing.
Accompanying drawing explanation
Figure 1A Yu Figure 1B is to show the system schematic that the computer apparatus of prior art is connected to external USB devices.
Fig. 2 A and Fig. 2 B is to show that the system protection circuit that this utility model preferred embodiment is provided is arranged in computer apparatus, and is connected correspondingly to the system schematic of circumscribed USB device.
Description of reference numerals
The system protection circuit of 100 anti-high-voltage signal impacts
1 switch element
2 embedded controllers
3 platform path controllers
4 logical blocks
200 computer apparatus
201 first usb connecting ports
2011 first power pins
2012 first low-potential signal pins
2013 first high potential signal pins
2014 first ground connection pins
202 power subsystems
203 processing units
204 alarm unit
205 circuit protection units
Detailed description of the invention
Referring to Fig. 2 A with Fig. 2 B, Fig. 2 A and Fig. 2 B is to show the system schematic that the system protection circuit that the anti-high-voltage signal that this utility model preferred embodiment is provided impacts is arranged in computer apparatus.As shown in the figure; a kind of system protection circuit 100 of anti-high-voltage signal impact; being disposed in a computer apparatus 200, computer apparatus 200 has one first usb connecting port 201, power subsystem 202, processing unit 203, alarm unit 204 and a circuit protection unit 205.
System protection circuit 100 comprises switch element 1, embedded controller 2, platform path controller 3 and a logical block 4.
Switch element 1 is electrically coupled to one first power pin 2011 of the first usb connecting port 201, power subsystem 202 and circuit protection unit 205.Embedded controller 2 is electrically coupled to switch element 1, processing unit 203 and alarm unit 204.Platform path controller 3 is electrically coupled to embedded controller 2.Logical block 4 is electrically coupled to one first low-potential signal pin 2012 and one first high potential signal pin 2013 of the first usb connecting port 201.
In practice, computer apparatus 200 is one second usb connecting port 301 being connected correspondingly to an external USB devices 300 with the first usb connecting port 201, and computer apparatus 200 the most e.g. notebook computer, but being not limited to this, computer apparatus 200 also can be host computer, panel computer or other intelligent electronic devices.Wherein, second usb connecting port 301 includes a second source pin 3011, one second low-potential signal pin 3012, one second high potential signal pin 3013 and one second ground connection pin 3014, and when the second usb connecting port 301 is connected correspondingly to the first usb connecting port 201, second source pin 3011, second low-potential signal pin 3012, second high potential signal pin 3013 and the second ground connection pin 3014 are to be electrically connected with the first power pin 2011 in the first usb connecting port 201, first low-potential signal pin 2012, first high potential signal pin 2013 and one first ground connection pin 2014.Additionally, external USB devices 300 also includes a built-in power 302 being electrically connected at second source pin 3011 and is electrically connected with in the second low-potential signal pin 3012 and data module 303 of the second high potential signal pin 3013.
From the above, when computer apparatus 200 is connected correspondingly to external USB devices 300 by the first usb connecting port 201 and the electric connection of the second usb connecting port 301, switch element 1 is to make a power for operation be transmitted between external USB devices 300 and computer apparatus 200 via the first power pin 2011 and the electric connection of second source pin 3011.
And logical block 4 is by the first high potential signal pin 2013 and electric connection of the second high potential signal pin 3013, and the next transmission carrying out a data signal with data module 303 of electric connection of the first low-potential signal pin 2012 and the second low-potential signal pin 3012.
In the present embodiment, built-in power 302 is electrically connected at the circuit of second source pin 3011 and is e.g. electrically connected at the circuit of the second high potential signal pin 3013 with data module 303 and produces short circuit and be connected, therefore the electric power that switch element 1 is provided with second source pin 3011 by the first power pin 2011, the second high potential signal pin 3013 can be shorted to, make the data signal that data module 303 is transmitted by the second high potential signal pin 3013 because forming a high-voltage signal with high voltage.
nullAnd logical block 4 is when detecting that data signal is high-voltage signal，It is to send a power-off signal to platform path controller 3，And send a system closedown signal to processing unit 203，Make platform path controller 3 control embedded controller 2 and send out a USB power source supply shutdown signal to switch element 1，And then make switch element 1 provide the electric power to the first power pin 2011 according to USB power source supply shutdown signal unit 202 of cutting off the electricity supply，Use and stop power supply to external USB devices 300，External USB devices 300 so can be effectively stoped to transmit with high-tension high-voltage signal to logical block 4，And then avoid platform path controller 3 to be damaged by impacting with high pressure，Computer apparatus 200 even can be avoided to occur system to work as the situation of machine，Processing unit 203 then carries out closing machine operation according to system closedown signal，Built-in power 302 is effectively avoided to provide electrical power to the second high potential signal pin 3013，Cause switch element 1 stop power supply external USB devices 300 processed time external USB devices 300 still cannot be stoped to transmit the situation with high-tension high-voltage signal to logical block 4.
In addition, embedded controller 2 more can send an alarm sounds signal to alarm unit 204 when receiving power-off signal, making alarm unit 204 send a notice alarm according to alarm sounds signal, effective prompting user the first usb connecting port 201 receives with high-tension high-voltage signal.Wherein, notice alarm e.g. comprises an audio alarm or a light alarm.
In sum, owing to this utility model is to utilize logical block to receive the first low-potential signal pin or data signal that the first high potential signal pin is transmitted, and when detecting that data signal is high-voltage signal, send power-off signal to platform path controller, make platform path controller control embedded controller and send out USB power source supply shutdown signal to switch element, and then make this switch element stop power supply to external USB devices according to USB power source supply shutdown signal, effectively avoid external USB devices and persistently transmit high-voltage signal because of the power supply of switch element, platform path controller is thereby avoided to damage because of high-voltage impact；In addition, the built-in power being had by external USB devices in order to avoid the high voltage of high-voltage signal is provided, cause the elements such as platform path controller the most impaired when switch element is stopped power supply, embedded controller of the present utility model more can send system closedown signal to processing unit, make processing unit carry out closing machine operation according to system closedown signal, effectively prevent high-voltage signal from the elements such as platform path controller are caused impacting with high pressure.Not impacting the circuit of computer apparatus for high-tension data signal compared to prior art, this utility model really can effectively solve high-voltage signal and enter, via signal pin, the circuit damage problem that computer apparatus is caused.
Need to supplement especially is, although this utility model embodiment being as a example by there is the built-in power external USB devices with data module, but the most then it is not limited to this, external USB devices is also without the USB device of built-in power Yu data module, electric fan that for example, USB interface drives or LED lamp etc., although these USB device are not required to use high potential signal pin and low-potential signal pin, but high potential signal pin or low-potential signal pin are it is possible to be connected with power pin short circuit, and transmit the high-voltage signal not being loaded with data message, and this aspect still belongs to the scope of external USB devices of this utility model indication.
By the above detailed description of preferred embodiments, it is intended to more clearly describe feature of the present utility model and spirit, and not with above-mentioned disclosed disclosed preferred embodiment, category of the present utility model is any limitation as.On the contrary, in its objective is the category being arranged in the scope of the claims that this utility model to be applied for wishing to contain various change and tool equality.
Claims (5)
1. a system protection circuit for anti-high-voltage signal impact, is disposed in a computer apparatus, this electricity
Brain device has one first usb connecting port, and this first usb connecting port comprises one first power supply
Pin, one first low-potential signal pin and one first high potential signal pin, it is characterised in that
This system protection circuit comprises:
One switch element, is electrically coupled to this first power pin of this first usb connecting port,
And butt up against a USB at one second usb connecting port of an external USB devices and connect end
During mouth, in order to carry out the transmission of a power for operation with this external USB devices；
One embedded controller, is electrically coupled to this switch element, and in order to send a USB electricity
Source supply shutdown signal, to this switch element, is used and is electrically connected at this first usb connecting port
During this external USB devices, this switch element is made to stop supplying according to this USB power source supply shutdown signal
Electricity is to this external USB devices；
One platform path controller, is electrically coupled to this embedded controller；And
One logical block, is electrically coupled to this first usb connecting port, this first electronegative potential letter
Number pin and this first high potential signal pin, with by this first usb connecting port receive this
The data signal that two usb connecting ports are transmitted, and detecting that this data signal is a high pressure
During signal, send a power-off signal to this platform path controller, make this platform path controller
Control this embedded controller send out this USB power source supply shutdown signal to this switch element, enter
And make this switch element stop power supply to this external USB according to this USB power source supply shutdown signal and fill
Put.
The system protection circuit of anti-high-voltage signal the most as claimed in claim 1 impact, it is characterised in that
This computer apparatus also has a processing unit, and this embedded controller is also electrically connected at this processing unit,
And this embedded controller also sends a system closedown signal extremely when receiving this power-off signal
This processing unit, makes this processing unit carry out closing machine operation according to this system closedown signal.
The system protection circuit of anti-high-voltage signal the most as claimed in claim 1 impact, it is characterised in that
Also comprising an alarm unit, this alarm unit is electrically coupled to this embedded controller, and this is embedded
Formula controller more sends an alarm sounds signal to this warning list when receiving this power-off signal
Unit, makes this alarm unit send a notice alarm according to this alarm sounds signal.
The system protection circuit of anti-high-voltage signal the most as claimed in claim 3 impact, it is characterised in that should
Notice alarm comprises an audio alarm or a light alarm.
The system protection circuit of anti-high-voltage signal the most as claimed in claim 1 impact, it is characterised in that
This computer apparatus is for a notebook computer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105202235U TWM522498U (en) | 2016-02-16 | 2016-02-16 | System protection circuit for preventing high voltage signal impact |
| TW105202235 | 2016-02-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205507681U true CN205507681U (en) | 2016-08-24 |
Family
ID=56511051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620254990.6U Active CN205507681U (en) | 2016-02-16 | 2016-03-30 | System protection circuit for preventing high-voltage signal impact |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN205507681U (en) |
| TW (1) | TWM522498U (en) |
-
2016
- 2016-02-16 TW TW105202235U patent/TWM522498U/en unknown
- 2016-03-30 CN CN201620254990.6U patent/CN205507681U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| TWM522498U (en) | 2016-05-21 |
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