CN114094560B - ESD protection system, device and manufacturing method thereof - Google Patents
ESD protection system, device and manufacturing method thereof Download PDFInfo
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- CN114094560B CN114094560B CN202111371433.4A CN202111371433A CN114094560B CN 114094560 B CN114094560 B CN 114094560B CN 202111371433 A CN202111371433 A CN 202111371433A CN 114094560 B CN114094560 B CN 114094560B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
Abstract
The invention discloses an ESD protection system, a device and a manufacturing method thereof, wherein the ESD protection system comprises a main circuit board, a microphone board and a main shell, wherein a copper strip part is arranged on the periphery of a first side surface of the microphone board; be provided with first absorption circuit module and first DAC detection module on the miaow head board, be provided with the second absorption circuit module on the main circuit board, seted up the portion of windowing on the main circuit board, main circuit board is provided with the second DAC detection module in the portion department of windowing. According to the invention, the absorption circuit is arranged to gradually discharge charges on the main shell body so as not to be accumulated on the main shell body all the time and further damage circuit components, the DAC detection circuit is matched to detect the ESD, the ESD is prevented from entering to damage a circuit system, and further the product is effectively protected, so that the influence of the ESD on the performance of the product can be solved, the product can be used more safely without excessive protection in the production, transportation and use processes, and the damage of the components is avoided by the good ESD performance as a whole, and the quality of the product is improved.
Description
Technical Field
The present invention relates to the field of electrostatic protection technologies, and in particular, to an ESD protection system, an ESD protection device, and a method for manufacturing the ESD protection device.
Background
Static electricity is an objective natural phenomenon, friction electrification and human static electricity are two major hazards in the electronic industry, and often cause unstable operation and even damage of electronic and electric products. ESD is a subject formed in the middle of the 20 th century to study the generation, hazard, and protection of static electricity, and equipment for static electricity protection is commonly referred to as ESD internationally.
In the existing part of electronic products, the PCB needs to be arranged in the shell, and the ESD caused by too close distance between the PCB and the shell affects the stability of the electronic product system, so that the distance between the PCB and the shell can be increased, the structural installation cost of the product can be increased, and the improvement of production benefits is not facilitated.
Disclosure of Invention
Accordingly, the present invention is directed to an ESD protection system, an ESD protection device, and a method for manufacturing the same, which can effectively avoid the problem of ESD risk and improve the stability of the ESD protection device.
In order to solve the technical problems, the invention adopts the following technical scheme: the ESD protection device comprises a main circuit board, a microphone board and a main shell, wherein the main circuit board and the microphone board are arranged in the main shell, the microphone board is attached to one side surface of the main shell, a copper strip part is arranged on the peripheral side of the first side surface of the microphone board, a slot is formed in the copper strip part, and the slot penetrates through the microphone board; the microphone board is provided with a first absorption circuit module and a first DAC detection module, the first absorption circuit module is used for carrying out absorption treatment on electrostatic charges, and the first DAC detection module is used for detecting ESD entering at a slot;
the main circuit board is provided with a second absorption circuit module which is used for absorbing and processing electrostatic charges; the main circuit board is provided with a windowing part, the windowing part is connected with the inside of the main shell, the main circuit board is provided with a second DAC detection module at the windowing part, and the second DAC detection module is used for detecting ESD entering at the windowing part.
In one embodiment, the first circuitry on the microphone board is provided with a ground terminal, and the first absorption circuit module connects the ground terminal with the copper strip portion.
In one embodiment, the main housing is provided with a fixing hole, and the first absorption circuit module on the microphone board is arranged at the fixing hole in a matching manner.
In one embodiment, an ink layer is disposed on one side of the microphone board and toward an inner side of a main housing.
In one embodiment, the second absorption circuit module is disposed at a connection between the main circuit board and the main housing.
In one embodiment, the main casing is internally provided with a fixing column facing the main circuit board, and the fixing column is fixed with the main circuit board through a screw piece.
In one embodiment, the first DAC detection module includes a first discharge tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator and a first MOS tube, where one end of the first discharge tube is grounded, the other end of the first discharge tube is connected to one end of the first resistor, one end of the first resistor is used to connect to the input end of the first DAC detection module, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the positive input end of the first comparator, one end of the third resistor is connected to the negative input end of the first comparator, the other end of the third resistor is connected to a reference voltage, the output end of the first comparator is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the gate of the first MOS tube, the source of the first MOS tube is grounded, one end of the fifth resistor is connected to the power supply, and the other end of the fifth resistor is connected to the drain of the first MOS tube and is used to connect to the output end of the first DAC detection module.
In one embodiment, the second DAC detection module includes a second discharge tube, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second comparator, and a second MOS tube, where one end of the second discharge tube is grounded, the other end of the second discharge tube is connected to one end of the sixth resistor, one end of the sixth resistor is used to connect to the input end of the second DAC detection module, the other end of the sixth resistor is connected to one end of the seventh resistor, the other end of the seventh resistor is connected to the positive input end of the second comparator, one end of the eighth resistor is connected to the negative input end of the second comparator, the other end of the eighth resistor is connected to the reference voltage, the output end of the second comparator is connected to one end of the ninth resistor, the other end of the ninth resistor is connected to the gate of the second MOS tube, the source of the second MOS tube is grounded, one end of the tenth resistor is connected to the power supply, and the other end of the tenth resistor is connected to the drain of the second MOS tube and is used to connect to the output end of the second DAC detection module.
An ESD protection system comprises a first circuit system and a second circuit system, wherein the first circuit system is used for being arranged on a microphone board, the second circuit system is used for being arranged on a main circuit board, the first circuit system comprises a first absorption circuit module and a first DAC detection module, the first absorption circuit module is used for carrying out absorption treatment on electrostatic charges, and the first DAC detection module is used for detecting the entry of ESD;
the second circuit system comprises a second absorption circuit module and a second DAC detection module, wherein the second absorption circuit module is used for carrying out absorption treatment on electrostatic charges, and the second DAC detection module is used for detecting the entry of ESD.
A method of manufacturing an ESD protection system comprising the steps of:
a first absorption circuit module is arranged in a first circuit system on the microphone board, an annular copper strip part with preset width is drawn at a preset distance from the periphery of a first side surface of the microphone board to the edge of the microphone board, a slotted structure is arranged on the copper strip part at intervals, and slots penetrate through the microphone board;
a silk-screen printing ink layer is added on one side surface of the microphone plate;
a first DAC detection module is arranged in a first circuit system on a microphone board;
a second absorption circuit module is arranged in a second circuit system of the main circuit board;
a windowing part is arranged on the main circuit board, a second DAC detection module is arranged in a second circuit system of the main circuit board, and the second DAC detection module is arranged at the windowing part;
and performing insulation treatment on the main circuit board, the microphone board and the main shell to complete the assembly process of the main circuit board, the microphone board and the main shell.
In summary, according to the ESD protection system, the ESD protection device and the manufacturing method thereof provided by the invention, the absorption circuit is arranged to gradually discharge charges on the main housing without accumulating on the main housing all the time and damaging circuit components, the DAC detection circuit is arranged to detect the ESD, so that the ESD is prevented from entering and damaging the circuit system, and further the product is effectively protected, the influence of the ESD on the performance of the product can be avoided, the ESD can be more safely removed without excessive protection in the production, transportation and use processes, the damage of the components is avoided, the quality of the product is improved, and the production cost is effectively reduced in the later maintenance aspect.
Drawings
Fig. 1 is a schematic structural view of an ESD protection device combined with an outer housing according to the present invention;
FIG. 2 is a schematic view of an ESD protection device combined with an outer housing from another view angle;
FIG. 3 is an exploded view of an ESD protection device coupled to an outer housing;
FIG. 4 is a schematic diagram of an ESD protection device according to the present invention;
FIG. 5 is an exploded view of an ESD protection device of the present invention;
FIG. 6 is an exploded view of an ESD protection device from another perspective;
fig. 7 is a schematic structural diagram of a microphone board according to the present invention;
FIG. 8 is a schematic circuit diagram of a first snubber circuit module of the present invention;
FIG. 9 is a schematic circuit diagram of a second tank circuit module according to the present invention;
FIG. 10 is a schematic circuit diagram of a main control chip module according to the present invention;
FIG. 11 is a block diagram of an ESD protection system of the present invention;
FIG. 12 is a flow chart of a method of manufacturing an ESD protection device according to the present invention;
fig. 13 is a flowchart illustrating a manufacturing method of an ESD protection device according to another embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 11, the ESD protection device of the present invention includes a main circuit board 100, a microphone board 200 and a main housing 300, wherein insulation processing is performed between the main circuit board 100 and the microphone board 200 and the main housing 300, and specifically, insulation separation can be performed between the main circuit board 100 and the main structure portion between the microphone board 200 and the main housing 300 by coating an insulation layer material, so as to ensure the independence of electrical connection therebetween.
The main circuit board 100 and the microphone board 200 are arranged in the main shell 300, the microphone board 200 is attached to one side surface of the main shell 300, a copper strip part 210 is arranged on the periphery of the first side surface of the microphone board 200, a slot 220 is formed in the copper strip part 210, and the slot 220 penetrates through the microphone board 200; the microphone board 200 is provided with a first absorption circuit module, and the first absorption circuit module is used for absorbing and processing electrostatic charges; specifically, the first circuitry on the microphone board 200 is provided with a ground terminal, and the first absorption circuit module connects the ground terminal with the copper strip portion 210.
In an embodiment, the main housing 300 is provided with the fixing hole 310, the microphone board 200 is fixed on the main housing 300 by using a screw member, and the first absorption circuit module on the microphone board 200 is arranged at the fixing hole 310 in a matching manner, so that charges on the main housing 300 are gradually discharged and cannot be accumulated on the main housing 300 all the time to damage circuit components, the influence of the ESD on the performance of the product can be solved, the product can be more safely removed without excessive protection in the production, transportation and use processes, the damage of the components is avoided due to good ESD performance, the quality of the product is improved, the later maintenance is more trouble-free, and the production cost is effectively reduced.
In one embodiment, no via and tip copper plating occurs around the copper strip portion 210 to avoid clutter from affecting the ESD-oriented process of the slot 220.
An ink layer (not shown) is disposed on one side of the microphone board 200, and the ink layer is disposed towards the inner side of the main housing 300, so that the distance between the microphone board 200 and the inner side of the main housing 300 is increased, and during the ESD entering process, firstly, the slot 220 of the copper strip portion 210 is selected as the introduction point for the ESD path, and then is absorbed by the first absorption circuit module, so that the ESD path is not directly introduced into the first circuit system designed on the microphone board 200, and the stability of the first circuit system on the microphone board 200 is not affected.
In one embodiment, the microphone board 200 is further provided with a first DAC detection module, and the first DAC detection module is used for detecting ESD entering at the slot 220; the first DAC detection module comprises a first discharge tube D36, a first resistor R110, a second resistor R111, a third resistor R116, a fourth resistor R115, a fifth resistor R108, a first comparator U1 and a first MOS tube G1, wherein one end of the first discharge tube D36 is grounded, the other end of the first discharge tube D36 is connected with one end of the first resistor R110, one end of the first resistor R110 is used for being connected with the input end of the first DAC detection module, the other end of the first resistor R110 is connected with one end of the second resistor R111, the other end of the second resistor R111 is connected with the positive input end of the first comparator U1, one end of the third resistor R116 is connected with the negative input end of the first comparator U1, the other end of the third resistor R116 is connected with a reference voltage, the output end of the first comparator U1 is connected with one end of the fourth resistor R115, the other end of the fourth resistor R115 is connected with the grid electrode of the first MOS tube G1, the source electrode of the first MOS tube G1 is grounded, one end of the fifth resistor R108 is connected with the other end of the first resistor R108, and the first resistor R1 is connected with the drain electrode of the first DAC detection module; when the ESD enters the first circuit system, the first DAC detection module detects that the voltage input value at the slot 220 exceeds the reference voltage, the first MOS tube G1 is controlled to be conducted through the first comparator U1, so that the power supply of the power supply to the microphone board 200 is disconnected, the damage to the first circuit system on the microphone board 200 caused by the ESD is prevented, and further the product is effectively protected; when the first DAC detection module detects that the voltage input value at the slot 220 does not exceed the reference voltage, the power supply of the power supply to the microphone board 200 is restarted, and the first circuit system is restarted, so that the influence of ESD on the performance of the product can be solved, the product can be used more safely in the production, transportation and use processes without excessive protection, the damage of components is avoided on the whole due to good ESD performance, the quality of the product is improved, the later maintenance aspect is saved, and the production cost is effectively reduced.
The second absorption circuit module is arranged on the main circuit board 100 and is used for absorbing and processing electrostatic charges, and the second absorption circuit module is arranged at the joint of the main circuit board 100 and the main casing 300, so that charges on the main casing 300 are gradually discharged and cannot be accumulated on the main casing 300 all the time so as to damage circuit components, the influence of ESD on the performance of products can be solved, the effects of the ESD on the performance of the products can be more relieved, the use can be avoided, the excessive protection can not be performed in the production, transportation and use processes, the damage of the components is avoided due to good ESD performance, the quality of the products is improved, the later maintenance is more worry-saving, and the production cost is effectively reduced.
The main circuit board 100 is provided with a window opening portion 110, the window opening portion 110 is connected with the inside of the main casing 300, specifically, a fixing column 320 is disposed in the main casing 300 facing the main circuit board 100, and the fixing column 320 is fixed with the main circuit board 100 through a screw member; the main circuit board 100 is provided with a second DAC detection module at the window portion 110, where the second DAC detection module is configured to detect ESD entering at the window portion 110; the second DAC detection module includes a second discharge tube D36', a sixth resistor R110', a seventh resistor R111', an eighth resistor R116', a ninth resistor R115', a tenth resistor R108', a second comparator U2, and a second MOS tube G2, where one end of the second discharge tube D36 'is grounded, the other end of the second discharge tube D36' is connected to one end of the sixth resistor R110', one end of the sixth resistor R110' is connected to an input end of the second DAC detection module, the other end of the sixth resistor R110 'is connected to one end of the seventh resistor R111', the other end of the seventh resistor R111 'is connected to a positive input end of the second comparator U2, one end of the eighth resistor R116' is connected to a negative input end of the second comparator U2, the other end of the eighth resistor R116 'is connected to a reference voltage, an output end of the second comparator U2 is connected to one end of the ninth resistor R115', the other end of the ninth resistor R115 'is connected to a gate of the second MOS tube G2, the other end of the second resistor R110' is connected to one end of the tenth resistor R108 'is connected to a ground, and the other end of the tenth resistor R108' is connected to the second DAC detection module; when the ESD enters the second circuit system, the second DAC detection module detects that the voltage input value at the windowing part 110 exceeds the reference voltage, the second MOS tube G2 is controlled to be conducted through the second comparator U2, so that the power supply of the power supply to the main circuit board 100 is disconnected, the damage to the second circuit system on the main circuit board 100 caused by the ESD is prevented, the product is further effectively protected, the influence of the ESD on the performance of the product can be solved, the product can be used more safely in the production, transportation and use processes without excessive protection, the damage of components is avoided as a whole due to the good ESD performance, the quality of the product is improved, and the product is more worry-saving in the later maintenance aspect, and the production cost is effectively reduced.
In one embodiment, the main circuit board 100 is provided with a main control chip module 120, a signal input end of the main control chip module 120 is connected with an enhancing unit 121, the enhancing unit 121 includes a first capacitor and a resistor R107, one end of the first capacitor is grounded, one end of the resistor R107 is connected with the other end of the first capacitor and a RESET end of the main control chip module 120, and the other end of the resistor R107 is connected with a power supply end VDD to improve driving capability of the main circuit board 100 on an input signal.
In one embodiment, the functional modules on the main circuit board 100 may be designed as ground connections to reduce the effect of ESD ingress on the input signal.
It should be noted that, the first snubber circuit module and the second snubber circuit module do not relate to the invention of the present invention, and all the solutions in the prior art may be adopted.
In one embodiment, the main housing 300 includes an upper cover 301 and a bottom plate 302, where the upper cover 301 and the bottom plate 302 enclose a receiving space, and the main circuit board 100 and the microphone board 200 are disposed in the receiving space; the connection part of the upper cover plate 301 and the bottom plate 302 is provided with a conductive part, so that the main housing 300 formed by the upper cover plate 301 and the bottom plate 302 forms a complete conductor.
The ink layer on the microphone board 200 is arranged towards the upper cover plate 301 to increase the distance between the microphone board 200 and the upper cover plate 301, in the process of ESD entering, firstly, the slotting 220 of the copper strip part 210 is selected as the leading-in point by the path of ESD entering, and then the path is absorbed by the first absorption circuit module, so that the influence of ESD on the product performance can be avoided, the influence of ESD on the first circuit system on the microphone board 200 can be avoided, excessive protection can be avoided in the production, transportation and use processes, the damage of components is avoided in the whole, the quality of the product is improved, the later maintenance is more careful, and the production cost is effectively reduced.
The fixing column 320 is formed by extending the bottom plate 302 towards one side of the main circuit board 100, the fixing column 320 is utilized to directly contact with a preset position on the main circuit board 100, the second DAC detection module is matched to detect the ESD entering at the windowing part 110, when the ESD entering at the windowing part 110 exceeds a threshold value, the second comparator U2 is utilized to control the second MOS tube G2 to enable the power supply to disconnect the power supply to the main circuit board 100, damage to a circuit system on the main circuit board 100 caused by the ESD is prevented, products are effectively protected, influences on performance of the products caused by the ESD can be solved, the products can be used more safely without excessive protection in the production, transportation and use processes, damage to components is avoided in the whole due to good ESD performance, the quality of the products is improved, the later maintenance aspect is saved, and the production cost is effectively reduced.
In one embodiment, an ESD protection device of the present invention is provided with an outer case 400 outside, and the outer case 400 is covered on the main case 300 to enhance the aesthetic appearance of the protection device of the present invention.
Referring to fig. 11, the present invention further provides an ESD protection system, which includes a first circuit system 10 and a second circuit system 20, wherein the first circuit system 10 is configured to be disposed on a microphone board 200, the second circuit system 20 is configured to be disposed on a main circuit board 100, the first circuit system 10 includes a first absorption circuit module and a first DAC detection module, the first absorption circuit module is configured to absorb electrostatic charges, and the first DAC detection module is configured to detect an ESD; when the ESD enters the first circuit system 10, when the voltage input value detected by the first DAC detection module exceeds the reference voltage, the first MOS tube G1 is controlled to be conducted through the first comparator U1, so that the power supply of the power supply to the first circuit system 10 is disconnected, the damage caused by the ESD entering the first circuit system 10 on the microphone board 200 is prevented, and further the product is effectively protected; when the voltage input value detected by the first DAC detection module does not exceed the reference voltage, the power supply of the power supply to the first circuit system 10 is restarted, so that the influence of ESD on the product performance can be solved, the product can be used more safely in the production, transportation and use processes without excessive protection, the damage of components is avoided on the whole due to good ESD performance, the quality of the product is improved, the later maintenance is more worry-saving, and the production cost is effectively reduced.
The second circuit system 20 includes a second absorption circuit module and a second DAC detection module, where the second absorption circuit module is used to perform absorption processing on the electrostatic charges, and the second DAC detection module is used to detect the ESD; when the ESD enters the second circuit system 20, when the voltage input value detected by the second DAC detection module exceeds the reference voltage, the second MOS tube G2 is controlled to be conducted through the second comparator U2, so that the power supply of the power supply to the second circuit system 20 is disconnected, the influence of the ESD on the performance of the product can be solved, the product can be used more safely in the production, transportation and use processes without excessive protection, the damage of components is avoided by the good ESD performance on the whole, the quality of the product is improved, the later maintenance aspect is more worry-saving, and the production cost is effectively reduced.
In one embodiment, the second circuit system 20 further includes a main control chip module 120, a signal input end of the main control chip module 120 is connected to an enhancing unit 121, and the enhancing unit 121 is configured to enhance driving capability of the second circuit system 20 on an input signal.
Other technical features of the above-mentioned ESD protection system are the same as those of the above-mentioned ESD protection device, and are not repeated here.
Referring to fig. 12, the present invention also provides a method for manufacturing an ESD protection device according to the above-mentioned embodiment of the present invention, in which the main circuit board 100, the microphone board 200 and the main housing 300 can have the same technical features and can produce the same technical effects as those described in the above-mentioned embodiment of the ESD protection device. According to the manufacturing method of the ESD protection device, the absorption circuit is arranged to gradually discharge charges on the main shell 300 so as not to be accumulated on the main shell 300 all the time and damage circuit components, the DAC detection circuit is matched to detect the ESD, the damage to a circuit system caused by the ESD is prevented, the product is further effectively protected, the influence of the ESD on the performance of the product can be avoided, the product can be used more safely without excessive protection in the production, transportation and use processes, the damage of the components is avoided due to good ESD performance, the quality of the product is improved, the later maintenance aspect is also more worry-saving, and the production cost is effectively reduced.
The invention relates to a manufacturing method of an ESD protection device, which comprises the following steps:
step S110, a first absorption circuit module is arranged in a first circuit system 10 on a microphone board 200, an annular copper strip part 210 with a preset width is drawn at a preset distance from the periphery of a first side surface of the microphone board 200 to the edge of the microphone board 200, and a slot 220 structure is arranged on the copper strip part 210 at intervals, wherein the slot 220 is arranged to penetrate through the microphone board 200; the first absorption circuit module is used for absorbing electrostatic charges, the first circuit system 10 on the microphone board 200 is provided with a grounding end, and the first absorption circuit module connects the grounding end with the copper strip portion 210.
Step S120, adding a silk-screen printing ink layer on one side surface of the microphone board 200; specifically, an ink layer is disposed on one side of the microphone board 200 facing the upper cover plate 301 to increase the distance between the microphone board 200 and the upper cover plate 301, in the process of ESD entering, firstly, the path of ESD entering will select the slot 220 of the copper strip 210 as the introduction point, and then be absorbed by the first absorption circuit module, so that the influence of ESD on the product performance can be avoided, the damage of components can be avoided in the process of production, transportation and use, the product quality is improved, and the later maintenance is more careful, and the production cost is effectively reduced.
In step S130, a first DAC detection module is provided in the first circuitry 10 on the microphone board 200, and the first DAC detection module is configured to detect ESD entering at the slot 220.
Step S140, setting a second absorption circuit module in the second circuit system 20 of the main circuit board 100; the second absorption circuit module is used for absorbing electrostatic charges, and is arranged at the joint of the main circuit board 100 and the main shell 300, so that charges on the main shell 300 are gradually discharged and cannot be accumulated on the main shell 300 all the time to damage circuit components, the influence of ESD on the performance of products can be avoided, the products can be used more safely in the production, transportation and use processes without excessive protection, the damage of the components is avoided by good ESD performance, the quality of the products is improved, and the later maintenance aspect is more worry-saving, so that the production cost is effectively reduced.
Step S150, a windowing part 110 is arranged on the main circuit board 100, and a second DAC detection module is arranged in the second circuit system 20 of the main circuit board 100, wherein the second DAC detection module is arranged at the windowing part 110; wherein the second DAC detection module is configured to detect ESD entry at the windowed portion 110.
Step S160, performing insulation treatment on the main circuit board 100, the microphone board 200 and the main housing 300, and completing the assembly process of the main circuit board 100, the microphone board 200 and the main housing 300; specifically, the main structure parts among the main circuit board 100, the microphone board 200 and the main housing 300 can be insulated and separated by coating the insulating layer material, so as to ensure the independence of electrical connection among the main circuit board 100, in addition, the bottom plate 302 extends towards one side of the main circuit board 100 to form a fixed column 320, the fixed column 320 is directly contacted with a preset position on the main circuit board 100, the second DAC detection module is matched for detecting the ESD entering at the window part 110, when the ESD entering at the window part 110 exceeds a threshold value, the second comparator U2 is used for controlling the second MOS tube G2 to disconnect the power supply to the main circuit board 100, so that the damage of the ESD to the circuit system on the main circuit board 100 is prevented, the product is effectively protected, the influence of the ESD on the product performance can be solved, the product can be used more safely in the production, transportation and use processes without excessive protection, the good ESD performance is avoided, the quality of the product is improved, the product is more seriously damaged in the aspect of later maintenance, and the production cost is effectively reduced.
Referring to fig. 13, in one embodiment, after the step S140, the method further includes
In step S170, a main control chip module 120 is disposed in the second circuit system 20 on the main circuit board 100, a signal input end of the main control chip module 120 is connected with an enhancing unit 121, and the enhancing unit 121 is used for enhancing driving capability of the second circuit system 20 on an input signal.
In summary, according to the ESD protection system, the device and the manufacturing method thereof provided by the invention, the absorption circuit is arranged to gradually discharge the charges on the main housing 300 without accumulating on the main housing 300 all the time and damaging the circuit components, the DAC detection circuit is arranged to detect the ESD access, so as to prevent the damage of the ESD access to the circuit system, and further effectively protect the product, thereby not only solving the problem of the influence of the ESD on the performance of the product, but also ensuring more safe use without excessive protection in the production, transportation and use processes, and avoiding the damage of the components as a whole by the good ESD performance, improving the quality of the product, saving more worry in the aspect of later maintenance, and effectively reducing the production cost.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (8)
1. An ESD protection device characterized in that: the microphone comprises a main circuit board, a microphone board and a main shell, wherein the main circuit board and the microphone board are arranged in the main shell, the microphone board is attached to one side surface of the main shell, a copper strip part is arranged on the periphery of the first side surface of the microphone board, a slot is formed in the copper strip part, and the slot penetrates through the microphone board; the microphone board is provided with a first absorption circuit module and a first DAC detection module, the first absorption circuit module is used for carrying out absorption treatment on electrostatic charges, and the first DAC detection module is used for detecting ESD entering at a slot;
the main circuit board is provided with a second absorption circuit module which is used for absorbing and processing electrostatic charges; the main circuit board is provided with a windowing part which is connected with the inside of the main shell, and a second DAC detection module is arranged at the windowing part and used for detecting ESD entering at the windowing part;
the first DAC detection module comprises a first discharge tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator and a first MOS tube, wherein one end of the first discharge tube is grounded, the other end of the first discharge tube is connected with one end of the first resistor, one end of the first resistor is used for being connected with the input end of the first DAC detection module, the other end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the positive input end of the first comparator, one end of the third resistor is connected with the negative input end of the first comparator, the other end of the third resistor is connected with a reference voltage, the output end of the first comparator is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the grid electrode of the first MOS tube, the source electrode of the first MOS tube is grounded, one end of the fifth resistor is connected with a power supply, and the other end of the fifth resistor is connected with the drain electrode of the first MOS tube and is used for being connected with the output end of the first DAC detection module;
the second DAC detection module comprises a second discharge tube, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second comparator and a second MOS tube, one end of the second discharge tube is grounded, the other end of the second discharge tube is connected with one end of the sixth resistor, one end of the sixth resistor is used for being connected with the input end of the second DAC detection module, the other end of the sixth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the positive input end of the second comparator, one end of the eighth resistor is connected with the negative input end of the second comparator, the other end of the eighth resistor is connected with a reference voltage, the output end of the second comparator is connected with one end of the ninth resistor, the other end of the ninth resistor is connected with the grid electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, one end of the tenth resistor is connected with a power supply, and the other end of the tenth resistor is connected with the drain electrode of the second MOS tube and is used for being connected with the output end of the second DAC detection module.
2. An ESD protection device according to claim 1, wherein: the first circuit system on the microphone board is provided with a grounding end, and the first absorption circuit module is connected with the grounding end and the copper strip part.
3. An ESD protection device according to claim 1, wherein: the main shell is provided with a fixing hole, and the first absorption circuit module on the microphone board is arranged at the fixing hole in a matching mode.
4. An ESD protection device according to claim 1, wherein: an ink layer is arranged on one side face of the microphone plate, and the ink layer is arranged towards the inner side face of a main shell.
5. An ESD protection device according to claim 1, wherein: the second absorption circuit module is arranged at the joint of the main circuit board and the main shell.
6. An ESD protection device according to claim 1, wherein: the main casing is internally provided with a fixing column towards the main circuit board, and the fixing column is fixed with the main circuit board through a screw part.
7. An ESD protection system characterized by: the circuit comprises a first circuit system and a second circuit system, wherein the first circuit system is used for being arranged on a microphone board, the second circuit system is used for being arranged on a main circuit board, the first circuit system comprises a first absorption circuit module and a first DAC detection module, the first absorption circuit module is used for carrying out absorption treatment on electrostatic charges, and the first DAC detection module is used for detecting the entry of ESD;
the second circuit system comprises a second absorption circuit module and a second DAC detection module, wherein the second absorption circuit module is used for carrying out absorption treatment on electrostatic charges, and the second DAC detection module is used for detecting the entry of ESD;
the first DAC detection module comprises a first discharge tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator and a first MOS tube, wherein one end of the first discharge tube is grounded, the other end of the first discharge tube is connected with one end of the first resistor, one end of the first resistor is used for being connected with the input end of the first DAC detection module, the other end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the positive input end of the first comparator, one end of the third resistor is connected with the negative input end of the first comparator, the other end of the third resistor is connected with a reference voltage, the output end of the first comparator is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the grid electrode of the first MOS tube, the source electrode of the first MOS tube is grounded, one end of the fifth resistor is connected with a power supply, and the other end of the fifth resistor is connected with the drain electrode of the first MOS tube and is used for being connected with the output end of the first DAC detection module;
the second DAC detection module comprises a second discharge tube, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second comparator and a second MOS tube, one end of the second discharge tube is grounded, the other end of the second discharge tube is connected with one end of the sixth resistor, one end of the sixth resistor is used for being connected with the input end of the second DAC detection module, the other end of the sixth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the positive input end of the second comparator, one end of the eighth resistor is connected with the negative input end of the second comparator, the other end of the eighth resistor is connected with a reference voltage, the output end of the second comparator is connected with one end of the ninth resistor, the other end of the ninth resistor is connected with the grid electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, one end of the tenth resistor is connected with a power supply, and the other end of the tenth resistor is connected with the drain electrode of the second MOS tube and is used for being connected with the output end of the second DAC detection module.
8. A method of manufacturing an ESD protection system comprising the steps of:
a first absorption circuit module is arranged in a first circuit system on the microphone board, an annular copper strip part with preset width is drawn at a preset distance from the periphery of a first side surface of the microphone board to the edge of the microphone board, a slotted structure is arranged on the copper strip part at intervals, and slots penetrate through the microphone board;
a silk-screen printing ink layer is added on one side surface of the microphone plate;
a first DAC detection module is arranged in a first circuit system on a microphone board;
a second absorption circuit module is arranged in a second circuit system of the main circuit board;
a windowing part is arranged on the main circuit board, a second DAC detection module is arranged in a second circuit system of the main circuit board, and the second DAC detection module is arranged at the windowing part;
insulating the main circuit board, the microphone board and the main shell to finish the assembly process of the main circuit board, the microphone board and the main shell;
the first DAC detection module comprises a first discharge tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator and a first MOS tube, wherein one end of the first discharge tube is grounded, the other end of the first discharge tube is connected with one end of the first resistor, one end of the first resistor is used for being connected with the input end of the first DAC detection module, the other end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the positive input end of the first comparator, one end of the third resistor is connected with the negative input end of the first comparator, the other end of the third resistor is connected with a reference voltage, the output end of the first comparator is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the grid electrode of the first MOS tube, the source electrode of the first MOS tube is grounded, one end of the fifth resistor is connected with a power supply, and the other end of the fifth resistor is connected with the drain electrode of the first MOS tube and is used for being connected with the output end of the first DAC detection module;
the second DAC detection module comprises a second discharge tube, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second comparator and a second MOS tube, one end of the second discharge tube is grounded, the other end of the second discharge tube is connected with one end of the sixth resistor, one end of the sixth resistor is used for being connected with the input end of the second DAC detection module, the other end of the sixth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the positive input end of the second comparator, one end of the eighth resistor is connected with the negative input end of the second comparator, the other end of the eighth resistor is connected with a reference voltage, the output end of the second comparator is connected with one end of the ninth resistor, the other end of the ninth resistor is connected with the grid electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, one end of the tenth resistor is connected with a power supply, and the other end of the tenth resistor is connected with the drain electrode of the second MOS tube and is used for being connected with the output end of the second DAC detection module.
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