CN217182946U

CN217182946U - Multi-scene high-energy patch pressure-sensitive protection circuit

Info

Publication number: CN217182946U
Application number: CN202122976612.2U
Authority: CN
Inventors: 李吉晓; 余国华; 谢军毅
Original assignee: Shanghai Baogong Industrial Co ltd
Current assignee: Shanghai Baogong Industrial Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-08-12
Anticipated expiration: 2031-11-30

Abstract

The application relates to a multi-scene high-energy patch voltage-sensitive protection circuit, which comprises a power supply access end, a patch voltage-sensitive resistor, a filter circuit and a signal connecting end, wherein the power supply access end, the patch voltage-sensitive resistor, the filter circuit and the signal connecting end are sequentially and electrically connected and are used for connecting a power supply; this application has the effect that improves working power supply's work efficiency.

Description

Multi-scene high-energy patch pressure-sensitive protection circuit

Technical Field

The application relates to the field of electronic equipment protection, in particular to a multi-scene high-energy patch pressure-sensitive protection circuit.

Background

With the continuous development of electronic technology, there are more and more direct current electronic devices with different functions, and the requirements of the direct current electronic devices on the power supply environment are more and more strict. If the requirement of the power supply environment does not meet the requirement, a protection circuit needs to be added in the direct current electronic equipment to enable the direct current electronic equipment to be in a normal working state and guarantee the service life of the direct current electronic equipment.

In the existing dc electronic device, a voltage switch type protection device, such as a gas discharge tube, is added at the input end of the power supply, and the voltage switch type protection device presents a high impedance when there is no transient overvoltage, and once the transient overvoltage is responded to lightning, the impedance is suddenly changed into a low impedance to allow lightning current to pass through, which is also called as a short-circuit switch type protection device.

In the process of implementing the application, the inventor finds that at least the following problems exist in the technology: although the gas discharge tube has strong impact current resistance and is not easy to fail, the gas discharge tube can continue current when no overvoltage exists, although the surge condition is passed, because normal working voltage is applied to two ends of the protection device, normal line power supply is influenced and cannot normally work, and meanwhile, the continuous low-resistance state of the protection line causes the risk that the line is over-high in temperature and on fire, and the line and equipment fail.

In the process of implementing the present application, the inventors have also found that: although the problem of follow current can be solved by connecting the switch-type protection device and the voltage-limiting protection device in series, the design of the circuit is complex, the wiring occupation space is large, the residual voltage of the surge protection effect is high, and the protection effect is poor because the two devices are connected in series.

In the process of implementing the application, the inventor also finds that: although some voltage-limiting protection devices such as transient suppression diodes can solve the problem of follow current, the size can be reduced, the good protection effect can be ensured, the leakage current is large at high temperature, and the surge power is greatly reduced; however, the transient suppression diode still has the disadvantages of large volume and high price for the same surge power.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, improve working power supply's protection effect, optimize the circuit, this application provides a many scenes high energy paster pressure sensitive protection circuit.

The application provides a many scenes high energy paster pressure sensitive protection circuit adopts following technical scheme:

a multi-scene high-energy patch voltage-sensitive protection circuit comprises a power supply access end, a patch voltage-sensitive resistor, a filter circuit and a signal connecting end, wherein the power supply access end, the patch voltage-sensitive resistor, the filter circuit and the signal connecting end are sequentially and electrically connected;

the power supply access end is electrically connected with the input end circuit of the filter circuit, and the patch piezoresistor is connected in parallel with the input end of the filter circuit.

Through adopting above-mentioned technical scheme, compare with current protection scheme, the scheme that adopts paster piezo-resistor has the wiring simply, can solve the problem of afterflow, and is small, protects effectual and low cost's advantage, has improved the protection effect of current low pressure circuit, adopts the stability and the reliability that paster pressure-sensitive can promote the protection circuit.

Preferably, the signal circuit is a weak current direct current power supply.

By adopting the technical scheme, after the weak current direct current power supply is matched with the patch piezoresistor, a simpler and safer protection circuit can be provided for the protected electronic device during overvoltage, the overvoltage resistance of the electronic equipment is improved, and the cost is reduced.

Preferably, the signal circuit is a fast charging power circuit.

By adopting the technical scheme, after the quick charging power supply circuit is matched with the patch piezoresistor, a protection circuit with smaller volume and higher power protection effect can be provided for the charged electronic equipment during overvoltage.

Preferably, the signal circuit is a signal protection circuit of the communication separation card.

By adopting the technical scheme, after the signal protection circuit of the communication separation card is matched with the patch piezoresistor, the communication separation card has a more optimized protection circuit and a more stable protection effect when the communication separation card is in overvoltage.

Preferably, the signal circuit is a security video circuit.

By adopting the technical scheme, after the security video circuit is matched with the surface mounted piezoresistor, the video data of the security video circuit can be more stably output and more reliably protected when the overvoltage occurs.

Preferably, the signal circuit is a POE power-taking circuit.

Through adopting above-mentioned technical scheme, POE gets behind the electric circuit cooperation paster piezo-resistor, and POE gets the protection circuit of electric circuit more succinct, and the wiring volume is little, and the protection effect is more stable and reliable.

Preferably, the patch piezoresistors are provided in plurality and electrically connected in series or in parallel with each other.

By adopting the technical scheme, the voltage withstanding value can be improved by connecting the plurality of patch piezoresistors in series, and the current withstanding capability of the protection circuit can be improved after the plurality of patch piezoresistors are connected in parallel.

Preferably, the patch piezoresistor is provided in plurality;

the patch piezoresistors are firstly connected in series and then electrically connected with one or more patch piezoresistors in parallel, or the patch piezoresistors are firstly connected in parallel and then electrically connected with one or more patch piezoresistors in series.

By adopting the technical scheme, the plurality of patch piezoresistors are electrically connected in series and in parallel, so that the withstand voltage value and the current resistance of a single patch piezoresistor are improved.

In summary, the present application includes at least one or more of the following beneficial effects:

compared with the existing protection circuit, the protection circuit has the advantages of higher temperature stability and reliability; compared with the existing protection scheme using a gas discharge tube, the scheme using the patch piezoresistor has the advantages of low cost and no follow current; compared with a switch type protection device and a voltage limiting type series structure, the circuit has the advantages of simple wiring, small circuit volume and good protection effect; compared with the transient suppression diode, the transient suppression diode has higher current endurance, smaller volume and more civilian price. Therefore, the protection scheme of the patch piezoresistor enables the operation in the electronic equipment to be safer, the protection effect to be good and the cost to be lower in a low-voltage line.

Drawings

FIG. 1 is a circuit diagram of an embodiment of the present application;

FIG. 2 shows a first case where a plurality of patch varistors are provided in the embodiment of the present application;

FIG. 3 is a second case where a plurality of patch varistors are provided in the embodiment of the present application;

FIG. 4 shows a third case where a plurality of patch varistors are provided in the embodiment of the present application;

fig. 5 shows a fourth case where a plurality of patch varistors are provided in the embodiment of the present application.

Reference numerals: 1. a power supply access end; 2. a chip varistor; 3. a filter circuit; 4. and a signal connecting end.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a multi-scene high-energy patch pressure-sensitive protection circuit. Referring to fig. 1, the multi-scenario high-energy patch voltage-sensitive protection circuit comprises a power supply access end 1, a patch voltage-sensitive resistor 2, a filter circuit 3 and a signal connection end 4, wherein the power supply access end 1, the patch voltage-sensitive resistor 2, the filter circuit 3 and the signal connection end are sequentially electrically connected and used for being connected with a power supply. The power supply access end 1 is electrically connected with an input end circuit of the filter circuit 3, and the patch piezoresistor 2 is connected in parallel with an input end of the filter circuit 3.

When designing a circuit, the patch piezoresistors 2 can be provided in plurality, and the patch piezoresistors 2 can be electrically connected in series or electrically connected in parallel. The plurality of patch piezoresistors 2 are connected in series to improve the withstand voltage value, and the plurality of patch piezoresistors 2 are connected in parallel to improve the current resistance of the protection circuit.

In the circuit, the circuit topology of the plurality of patch piezoresistors 2 can be as follows:

referring to fig. 2, the first case: the patch piezoresistors 2 are connected in series and then electrically connected in parallel with one patch piezoresistor 2;

referring to fig. 3, the second case: the plurality of patch piezoresistors 2 are connected in series and then electrically connected in parallel with the plurality of patch piezoresistors 2.

Referring to fig. 4, a third case: a plurality of the chip piezoresistors 2 are firstly connected in parallel and then electrically connected in series with one chip piezoresistor 2.

Referring to fig. 5, a fourth case: the plurality of patch piezoresistors 2 are firstly connected in parallel and then electrically connected in series with the plurality of patch piezoresistors 2.

The plurality of patch piezoresistors 2 are electrically connected in series and in parallel, so that the voltage resistance and the current resistance of the single patch piezoresistor 2 are improved.

There may be several cases regarding the signal circuit:

first, the signal circuit is a weak current dc power supply. The weak current direct current power supply can be a direct current power supply for supplying power to communication electronic equipment and monitoring electronic equipment. After the weak current direct current power supply is matched with the patch piezoresistor 2, a simpler and safer protection circuit can be provided for the protected electronic device during overvoltage, the overvoltage resistance of the electronic equipment is improved, and the cost is reduced.

In the second mode, the signal circuit is a fast charging power circuit. The fast charging power supply circuit may be a fast charging power supply for charging a smart phone having a fast charging function. After the quick-charging power supply circuit is matched with the patch voltage dependent resistor 2, a protection circuit with a smaller volume and a higher power protection effect can be provided for the charged electronic equipment during overvoltage.

Thirdly, the signal circuit is a signal protection circuit of the communication separation card. The communication separation card can be an intelligent separation type SIM card holder device which can work stably for a long time only by being matched with a signal protection circuit. After the signal protection circuit of the communication separation card is matched with the patch voltage dependent resistor 2, the communication separation card has a more optimized protection circuit and a more stable protection effect when the communication separation card is in overvoltage.

And fourthly, the signal circuit is a security video circuit. The security video circuit has high requirements on signal stability, and a filter circuit is required to filter the direct-current power supply and the signal transmission circuit. After the security video circuit is matched with the surface mounted piezoresistor 2, the video data of the security video circuit can be more stably output and more reliably protected when the overvoltage occurs.

Fifthly, the signal circuit is a POE power-taking circuit. POE (Power-Over-Ethernet) refers to a technology that can provide dc Power for some IP-based terminals (such as IP phones, wireless lan access points AP, network cameras, etc.) while transmitting data signals for such devices without any change to the existing Ethernet cat.5 wiring infrastructure. POE power take, which may be referred to as POE power, may also be referred to as lan-based power system or active ethernet, sometimes also referred to simply as POE power, is the latest standard specification for simultaneous data and electrical power transfer using existing standard ethernet transmission cables, and maintains compatibility with existing ethernet systems and users. After the POE power-taking circuit is matched with the patch voltage dependent resistor 2, the protection circuit of the POE power-taking circuit is simpler, the wiring volume is small, and the protection effect is more stable and reliable.

The implementation principle of the multi-scene high-energy patch pressure-sensitive protection circuit in the embodiment of the application is as follows: compared with the existing protection circuit, the protection circuit has the advantages of higher temperature stability and reliability; compared with the existing protection scheme using a gas discharge tube, the scheme using the patch piezoresistor has the advantages of low cost and no follow current; compared with a switch type protection device and a voltage limiting type series structure, the circuit has the advantages of simple wiring, small circuit volume and good protection effect; compared with the transient suppression diode, the transient suppression diode has higher current endurance, smaller volume and more civilian price. Therefore, the protection scheme of the patch piezoresistor enables the operation in the electronic equipment to be safer, the protection effect to be good and the cost to be lower in a low-voltage line.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a pressure-sensitive protection circuit of multi-scene high energy paster which characterized in that: the power supply circuit comprises a power supply access end (1) for connecting a power supply, a patch piezoresistor (2), a filter circuit (3) and a signal connecting end (4) for connecting a signal circuit, which are sequentially and electrically connected;

the power supply access end (1) is electrically connected with an input end circuit of the filter circuit (3), and the patch piezoresistor (2) is connected in parallel with an input end of the filter circuit (3).

2. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: the signal circuit is a weak current direct current power supply.

3. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: the signal circuit is a fast charging power circuit.

4. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: the signal circuit is a signal protection circuit of the communication separation card.

5. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: the signal circuit is a security video circuit.

6. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: the signal circuit is a POE power-taking circuit.

7. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: the patch piezoresistors (2) are arranged in a plurality and are mutually and electrically connected in series or in parallel.

8. The multi-scene high-energy patch pressure-sensitive protection circuit according to claim 1, wherein: a plurality of patch piezoresistors (2) are arranged;

the patch piezoresistors (2) are firstly connected in series and then electrically connected with one or more patch piezoresistors (2) in parallel, or the patch piezoresistors (2) are firstly connected in parallel and then electrically connected with one or more patch piezoresistors (2) in series.