CN220342036U - Electrostatic protection circuit structure and electronic equipment - Google Patents
Electrostatic protection circuit structure and electronic equipment Download PDFInfo
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- CN220342036U CN220342036U CN202321576753.8U CN202321576753U CN220342036U CN 220342036 U CN220342036 U CN 220342036U CN 202321576753 U CN202321576753 U CN 202321576753U CN 220342036 U CN220342036 U CN 220342036U
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- 230000003068 static effect Effects 0.000 claims abstract description 73
- 239000003990 capacitor Substances 0.000 claims description 94
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 abstract description 39
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 8
- 238000010586 diagram Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Elimination Of Static Electricity (AREA)
Abstract
The utility model discloses an electrostatic protection circuit structure and electronic equipment, which comprise an input signal interface end, an output signal interface end, a zero line end and at least two electrostatic prevention modules, wherein each electrostatic prevention module is of a primary electrostatic prevention structure, the at least two electrostatic prevention modules are sequentially connected in series to form an electrostatic protection multi-stage combined structure, the electrostatic protection multi-stage combined structure comprises an electrostatic prevention module at the front end and an electrostatic prevention module at the tail end, the electrostatic prevention module at the front end is respectively connected with the input signal interface end and the output signal interface end, and the zero line end is connected with the electrostatic prevention module at the tail end. The utility model has lower manufacturing cost, discharges high-voltage static electricity through the zero line, has good static electricity protection effect, and can be applied to various electronic equipment.
Description
Technical Field
The utility model relates to the technical field of static electricity protection, in particular to a static electricity protection circuit structure and electronic equipment.
Background
Electrostatic discharge (ESD: electrostatic Discharge) should be the main cause of damage to all electronic components or integrated circuit systems from excessive electrical stress (EOS: electrical Over Stress). Since static electricity is typically very high (several kilovolts) instantaneously, this damage is destructive and permanent, causing the circuit to burn out directly. In order to prevent the electrostatic discharge from damaging the integrated circuit, a corresponding electrostatic protection circuit structure needs to be arranged on the interface circuit of the integrated circuit, so that the electrostatic protection circuit structure is required to protect electronic elements from being damaged by the electrostatic discharge, and the system can still continue to operate in case of an electrostatic discharge event. With the increasing speed of operation of integrated circuit interfaces, the design difficulty of the electrostatic protection circuit structure for the integrated circuit interface circuit is also increasing.
In the existing static protection circuit structure, a TVS/ESD protection diode is usually placed at the front end of the protected circuit to protect, as shown in fig. 4, the structure includes a resistor R2 and a TVS diode, the static resistance of the structure is limited by the self-bearing capacity of the static protection diode, and when the static voltage exceeds the self-bearing capacity of the static protection diode, the static protection effect of the static protection diode is greatly compromised, and even the protection effect is lost. And TVS/ESD antistatic diode is expensive, increase product cost.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an electrostatic protection circuit structure with good electrostatic protection capability, which can be applied to various types of electronic equipment, and the electronic equipment.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a static protection circuit structure, includes input signal interface end, output signal interface end, zero line end and two at least static modules of preventing, and each static module of preventing is the one-level static structure of preventing, and two at least static modules of preventing connect gradually in series form the multistage integrated configuration of static protection, and this multistage integrated configuration of static protection includes the static module of preventing of front end and terminal static module of preventing, and the static module of preventing of front end is connected with input signal interface end and output signal interface end respectively, and zero line end is connected with terminal static module of preventing.
As a further improvement, the antistatic module comprises an electrostatic absorption energy storage device and an electrostatic energy consumption device, wherein the electrostatic absorption energy storage device is connected with the electrostatic energy consumption device in parallel.
As a further improvement, the antistatic module comprises a capacitor and a resistor, wherein the capacitor and the resistor are connected in parallel to form a connection end and a connection two ends, the connection end is connected with the input signal interface end and the output signal interface end, and the connection two ends are connected with another antistatic module.
As a further improvement, two antistatic modules are arranged in total, and the two antistatic modules are connected in series to form a protection two-stage combined structure.
As a further improvement, in the two antistatic modules, one antistatic module comprises a resistor R1 and a capacitor CY1, the other antistatic module comprises a resistor R2 and a capacitor CY2, the resistor R1 and the capacitor CY1 are connected in parallel, the resistor R2 and the capacitor CY2 are connected in parallel, the resistor R1 and the capacitor CY1 are connected with an input signal interface end and an output signal interface end, the resistor R2 and the capacitor CY2 are connected with a zero line end, and the resistor R2 and the capacitor CY2 are connected in parallel and then connected with the resistor R1 and the capacitor CY1 which are connected in parallel.
As a further improvement, the resistor R1 and the resistor R2 are disposed on the same side, and the capacitor CY1 and the capacitor CY2 are disposed on the same side.
As a further improvement, the resistances of the resistor R1 and the resistor R2 are the same or different, and the capacities of the capacitor CY1 and the capacitor CY2 are the same or different.
As a further improvement, at least one capacitor and one resistor are included in one antistatic module, and when there are two or more capacitors and two or more resistors, the two or more capacitors are connected in series, and the two or more resistors are connected in series.
As a further improvement, in one antistatic module, the number of the capacitors and the resistors is the same and is in one-to-one correspondence.
As a further improvement, the capacitance may be selected as a fixed-capacity capacitor or a variable-capacity capacitor, and the resistance may be selected as a glass-glaze resistance.
An electronic device, which uses the electrostatic protection circuit structure.
Compared with the prior art, the utility model has the following beneficial technical effects:
1. the electrostatic protection effect is formed by adopting a mode of connecting the capacitor and the resistor, the resistor and the capacitor belong to common electronic components, and are easy to obtain and low in cost, so that the overall manufacturing cost is reduced, and the production pressure is reduced;
2. the matching is relatively simple, at least two stages of protection structures are formed only by parallel connection of the capacitor and the resistor, after part of high-voltage static electricity is absorbed and consumed by the anti-static module, the rest part of high-voltage static electricity is discharged by the part, the whole discharging loop is more direct and effective, the multi-stage protection is realized, and the effect is good;
3. the portability is strong, and the method can be widely applied to various electronic devices.
Drawings
FIG. 1 is a schematic diagram of a connection module of the present utility model;
FIG. 2 is a schematic diagram of a circuit diagram according to a second embodiment of the present utility model;
FIG. 3 is a schematic circuit diagram of a third embodiment of the present utility model;
fig. 4 is a schematic diagram of an electrostatic protection circuit in the prior art.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.
In the description of the present utility model, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of description and simplification of the description, and does not indicate or imply that the indicated apparatus or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
As shown in fig. 1-2, an electrostatic protection circuit structure includes an INPUT signal interface end INPUT, an OUTPUT signal interface end OUTPUT, a zero line end ACN, and at least two antistatic modules, each antistatic module is a primary antistatic structure, at least two antistatic modules are sequentially connected in series to form an electrostatic protection multi-stage combination structure, the electrostatic protection multi-stage combination structure includes a front antistatic module and a terminal antistatic module, the front antistatic module is connected with the INPUT signal interface end and the OUTPUT signal interface end respectively, and the zero line end is connected with the terminal antistatic module. Through the multistage integrated configuration of static protection for the static that produces is absorbed and consumed many times, then when still remaining some static, the rethread zero line end directly discharges the static that remains this moment to the output high voltage static through output signal interface end can be reduced to the low voltage energy that does not become threat to electronic component constitution, thereby reaches the purpose that protection master control circuit board is not damaged by high voltage static.
The anti-static module comprises a capacitor and a resistor, wherein the capacitor and the resistor are connected in parallel to form a connection end and a connection end, the connection end is connected with an input signal interface end and an output signal interface end, the connection end of the connection end is connected with the connection end of another anti-static module, and therefore the series connection of the anti-static modules is formed, a multistage anti-static effect is formed, and the anti-static module has a better static protection effect.
With fig. 1 as a reference direction, each antistatic module is sequentially connected from top to bottom.
When the INPUT signal is accompanied by high-voltage static electricity, most of the high-voltage static electricity is absorbed and stored by the first-stage anti-static module and consumed, and part of static electricity still remains through the first-stage anti-static module, at the moment, the static electricity passes through the second-stage anti-static module, and the static electricity can be absorbed and consumed until the static electricity passes through the last-stage anti-static module, and after the static electricity comes out of the last-stage anti-static module, the residual static electricity is discharged through the zero line ACN. And finally, the high-voltage static electricity on the OUTPUT signal can be reduced to low-voltage energy which can not threaten electronic elements, so that the aim of protecting the main control circuit board from being damaged by the high-voltage static electricity is fulfilled.
Example two
As shown in fig. 1 and 2, an electrostatic protection circuit structure includes an INPUT signal interface end INPUT, an OUTPUT signal interface end OUTPUT, a zero line end ACN, and at least two antistatic modules, each antistatic module is a primary antistatic structure, two antistatic modules are disposed together, and the two antistatic modules are sequentially connected in series to form an electrostatic protection two-stage combined structure.
One of the anti-static modules comprises a resistor R1 and a capacitor CY1, the other anti-static module comprises a resistor R2 and a capacitor CY2, the resistor R1 and the capacitor CY1 are connected in parallel, the resistor R2 and the capacitor CY2 are connected in parallel, the resistor R1 and the capacitor CY1 are connected with an input signal interface end and an output signal interface end, and the resistor R2 and the capacitor CY2 are connected with a zero line end. Moreover, the resistor R1 and the resistor R2 are disposed on the same side, and the capacitor CY1 and the capacitor CY2 are disposed on the same side, i.e., if the resistor R1 and the resistor R2 are on the same connection line as a whole, the capacitor CY1 and the capacitor CY2 are also on the same connection line. Through the connection, two-stage electrostatic protection is formed.
In this embodiment, the resistances of the resistor R1 and the resistor R2 are the same, and the capacities of the capacitor CY1 and the capacitor CY2 are the same. Of course, in some cases where there is a specific requirement, the resistances R1 and R2 and the resistance values may be set to be different, and the capacities of the capacitor CY1 and the capacitor CY2 may be selected to be different.
In the present embodiment, referring to fig. 2, when the INPUT signal is accompanied by high-voltage static electricity, most of the high-voltage static electricity is absorbed and stored by the capacitor CY1 of the primary electrostatic protection circuit structure, and the high-voltage static electricity stored in the capacitor CY1 is consumed through the resistor R1; after the absorption and consumption of the primary electrostatic protection circuit structure, the remaining part of the high-voltage static electricity is absorbed and stored by the capacitor CY2 of the secondary electrostatic protection circuit structure, and the part of the high-voltage static electricity stored in the capacitor CY2 is further consumed through the resistor R2. The residual high-voltage static electricity is finally discharged through the zero line ACN. And finally, the high-voltage static electricity on the OUTPUT signal can be reduced to low-voltage energy which can not threaten electronic elements, so that the aim of protecting the main control circuit board from being damaged by the high-voltage static electricity is fulfilled.
Example III
Referring to fig. 1 and 3, an electrostatic protection circuit structure includes an INPUT signal interface end INPUT, an OUTPUT signal interface end OUTPUT, a zero line end ACN, and at least two antistatic modules, each of which is a primary antistatic structure, three antistatic modules are disposed in total, and the three antistatic modules are sequentially connected in series to form an electrostatic protection three-stage combination structure.
The three anti-static modules comprise a resistor R1 and a capacitor CY1, the other anti-static module comprises a resistor R2 and a capacitor CY2, the other anti-static module comprises a resistor R3 and a capacitor CY3, the resistor R1 and the capacitor CY1 are connected in parallel, the resistor R2 and the capacitor CY2 are connected in parallel, the resistor R3 and the capacitor CY3 are connected in parallel, the resistor R1 and the capacitor CY1 are connected with an input signal interface end and an output signal interface end, the resistor R1 and the capacitor CY1 after being connected in parallel are connected with the resistor R2 and the capacitor CY2 after being connected in parallel, the resistor R2 and the capacitor CY2 after being connected in parallel are connected with the resistor R3 and the capacitor CY3 after being connected in parallel, and the resistor R3 and the capacitor CY3 after being connected in parallel are connected with a zero line end. Moreover, the resistor R1, the resistor R2 and the resistor R3 are arranged on the same side, and the capacitor CY1, the capacitor CY2 and the capacitor CY3 are arranged on the same side, i.e. if the resistor R1, the resistor R2 and the resistor R3 are on the same connecting line as seen in the whole, the capacitor CY1, the capacitor CY2 and the capacitor CY3 are also on the same connecting line. Through the connection, three-level electrostatic protection is formed.
Referring to fig. 3, when the INPUT signal is accompanied by high-voltage static electricity in-coming, most of the high-voltage static electricity is absorbed and stored by the capacitor CY1 of the primary static electricity protection circuit structure, and the part of the high-voltage static electricity stored in the capacitor CY1 is consumed through the resistor R1; after the absorption and consumption of the primary electrostatic protection circuit structure, the remaining part of the high-voltage static electricity is absorbed and stored by the capacitor CY2 of the secondary electrostatic protection circuit structure, and the part of the high-voltage static electricity stored in the capacitor CY2 is further consumed through the resistor R2. At this time, a part of the high-voltage static electricity stored in the capacitor CY3 may be further consumed through the resistor R3, and the high-voltage static electricity may remain and be further absorbed and stored by the capacitor CY3 in the three-stage static electricity protection circuit structure. The residual high-voltage static electricity is finally discharged through the zero line ACN. And finally, the high-voltage static electricity on the OUTPUT signal can be reduced to low-voltage energy which can not threaten electronic elements, so that the aim of protecting the main control circuit board from being damaged by the high-voltage static electricity is fulfilled.
Generally, the three-stage electrostatic protection circuit is configured to satisfy electrostatic treatment of various electronic devices, and if electronic devices with specific requirements are encountered, and the size specification of a single resistor or capacitor cannot satisfy electrostatic treatment, the multi-stage electrostatic protection module can be appropriately added to ensure electrostatic consumption treatment.
In addition, in an antistatic module, only one capacitor and one resistor are included, and the number of the capacitors and the resistors is the same and is in one-to-one correspondence. Or in an antistatic module, the antistatic module can comprise a capacitor and two resistors, wherein the two resistors are connected in series and then connected in parallel with the capacitor; or other types of numbers.
For example, in the second and third embodiments, an antistatic module includes only one capacitor and one resistor, which are connected in parallel, and then connected to another antistatic module. When the resistance of one resistor cannot meet the requirement of static electricity consumption treatment, and when the resistor with a larger resistance cannot be obtained based on a limited condition, two or more resistors with smaller resistance can be connected in series, namely the resistors with smaller resistance are connected in series to form a resistor with a larger resistance, and then the resistor is connected with a corresponding capacitor in parallel, so that more static electricity consumption can be achieved.
The whole structure is relatively simple, only the conventional combination connection of the capacitor and the resistor is needed, and the device can be applied to various types of electronic equipment. For the capacitance, a fixed easy capacitor or a variable capacity capacitor can be selected, and the resistance can be selected from glass glaze resistance with low price or other types of capacitance and resistance.
In addition, the utility model also provides electronic equipment, and the electrostatic protection circuit structure is applied to the electronic equipment, so that the electrostatic of the electronic equipment is effectively treated and damage to the electronic equipment caused by the electrostatic is avoided.
It should be noted that, the foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited to the foregoing embodiment, but it should be understood that although the present utility model has been described in detail with reference to the embodiment, it is possible for those skilled in the art to make modifications to the technical solutions described in the foregoing embodiment, or to make equivalent substitutions for some technical features thereof, but any modifications, equivalent substitutions, improvements and the like within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The utility model provides a static protection circuit structure, its characterized in that, including input signal interface end, output signal interface end, zero line end and two at least anti-static modules, every anti-static module is the one-level anti-static structure, and at least two anti-static modules connect in series in proper order and form the multistage integrated configuration of static protection, and this multistage integrated configuration of static protection includes the anti-static module of front end and terminal anti-static module, and the anti-static module of front end is connected with input signal interface end and output signal interface end respectively, and zero line end is connected with terminal anti-static module, anti-static module includes static absorption energy storage device and static power consumption device, static absorption energy storage device and static power consumption device parallel connection, static absorption energy storage device is electric capacity, and static power consumption device is resistance, electric capacity and resistance parallel connection back are connected with input signal interface end and output signal interface end.
2. The electrostatic protection circuit structure according to claim 1, wherein two anti-static modules are provided, and the two anti-static modules are connected in series to form a protection two-stage combination structure.
3. The electrostatic protection circuit structure according to claim 2, wherein one of the two electrostatic protection modules includes a resistor R1 and a capacitor CY1, the other electrostatic protection module includes a resistor R2 and a capacitor CY2, the resistor R1 and the capacitor CY1 are connected in parallel, the resistor R2 and the capacitor CY2 are connected in parallel, the resistor R1 and the capacitor CY1 are connected with an input signal interface end and an output signal interface end, the resistor R2 and the capacitor CY2 are connected with a zero line end, and the resistor R2 and the capacitor CY2 are connected in parallel and then connected with the resistor R1 and the capacitor CY1 connected in parallel.
4. The electrostatic protection circuit structure according to claim 3, wherein the resistor R1 and the resistor R2 are disposed on the same side, and the capacitor CY1 and the capacitor CY2 are disposed on the same side.
5. The electrostatic protection circuit structure according to claim 3, wherein the resistances of the resistor R1 and the resistor R2 are the same or different, and the capacities of the capacitor CY1 and the capacitor CY2 are the same or different.
6. The electrostatic protection circuit structure according to claim 1, wherein at least one capacitor and one resistor are included in one antistatic module, and when there are two or more capacitors and two or more resistors, the two or more capacitors are connected in series, and the two or more resistors are connected in series.
7. The electrostatic protection circuit structure according to claim 2, wherein the capacitance is selected as a fixed-capacity capacitor or a variable-capacity capacitor, and the resistance is selected as a glass-glaze resistance.
8. An electronic device characterized by applying the electrostatic protection circuit structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321576753.8U CN220342036U (en) | 2023-06-19 | 2023-06-19 | Electrostatic protection circuit structure and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321576753.8U CN220342036U (en) | 2023-06-19 | 2023-06-19 | Electrostatic protection circuit structure and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220342036U true CN220342036U (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321576753.8U Active CN220342036U (en) | 2023-06-19 | 2023-06-19 | Electrostatic protection circuit structure and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220342036U (en) |
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2023
- 2023-06-19 CN CN202321576753.8U patent/CN220342036U/en active Active
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