CN205863912U - A kind of electrostatic protection apparatus - Google Patents
A kind of electrostatic protection apparatus Download PDFInfo
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- CN205863912U CN205863912U CN201620673073.1U CN201620673073U CN205863912U CN 205863912 U CN205863912 U CN 205863912U CN 201620673073 U CN201620673073 U CN 201620673073U CN 205863912 U CN205863912 U CN 205863912U
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Abstract
This utility model relates to a kind of electrostatic protection apparatus.This device includes the first discharge cell (110) and the second discharge cell (120).Described first discharge cell (110) is positioned at and is arranged at the interface position of electronic equipment, including the first diode D1 and the second diode D2, the positive pole of described first diode D1 connects earth terminal, the negative pole of described first diode D1 and the negative pole of the second diode D2 connect, and the positive pole of described two or two pipe pipe connects holding wire；Described second discharge cell (120) is arranged at the internal circuit position of electronic equipment, including the 3rd diode D3 and the 4th diode D4, the positive pole of described 3rd diode D3 connects earth terminal, the negative pole of described 3rd diode connects the negative pole of described 4th diode D4, and the positive pole of described 4th diode D4 connects holding wire.To be solved in the utility model one technical problem is that prevent internal circuit or chip because of introduce electrostatic and damage.This electrostatic protection apparatus can be applicable to the electronic product of wearable class.
Description
Technical field
This utility model relates to a kind of electrostatic protection apparatus, more specifically, this utility model relates to having two-way or multichannel
The device of antistatic protection function.
Background technology
At present, the size of wearable series products is more and more less, and the PCB space of product is more and more less.And will be by wearable
Sufficiently small and the power saving that series products does, needs more advanced manufacture of semiconductor technology.Insulating oxide between semiconductor crystal
It is the thinnest, it is easy to by ESD punch through damage, so this electronic product is required for plus ESD protective device to realize system
Stablize and hardware is not by ESD damage.Meanwhile, ESD protective device also to have the highest voltage tolerance grade.
But, in the prior art, it is common that in the seam placement ESD protective device of product, but under many circumstances,
Due to coupling and the uncertainty of electrostatic position, the electrostatic for back-end circuit cannot be avoided, and causes electrostatic to introduce, even punctures
Chip, causes product rejection.
Accordingly, it would be desirable to improve prior art to solve at least one problem above-mentioned.
Utility model content
A purpose of the present utility model is to provide has two-way or the electrostatic protection apparatus of multichannel electrostatic leakage ability.
According to an aspect of the present utility model, it is provided that a kind of electrostatic protection apparatus.This device includes being connected to signal
The first discharge cell between line and earth terminal GND and the second discharge cell, wherein:
Described first discharge cell is positioned at and is arranged at the interface position of electronic equipment, including the first diode D1 and second
The positive pole of diode D2, described first diode D1 connects earth terminal GND, the negative pole of described first diode D1 and the two or two pole
The negative pole of pipe D2 connects, and the positive pole of described second diode connects holding wire；
Described second discharge cell is arranged at the internal circuit position of electronic equipment, including the 3rd diode D3 and the 4th
The positive pole of diode D4, described 3rd diode D3 connects earth terminal GND, and the negative pole of described 3rd diode connects the described 4th
The negative pole of diode D4, the positive pole of described 4th diode D4 connects holding wire.
Preferably, described first discharge cell also includes in parallel with described first diode D1 and described second diode D2
The 5th diode D5 connected and the positive pole of the 6th diode D6, described 5th diode D5 connect described first diode D1's
Positive pole, the negative pole of described 5th diode D5 connects the negative pole of described 6th diode D6, the positive pole of described 6th diode D6
Connect the positive pole of described second diode D2.
Preferably, described second discharge cell also includes in parallel with described 3rd diode D3 and described 4th diode D4
The 7th diode D7 connected and the positive pole of the 8th diode D8, described 7th diode D7 connect described 3rd diode D3's
Positive pole, the negative pole of described 7th diode D7 connects the negative pole of described 8th diode D8, the positive pole of described 8th diode D8
Connect the positive pole of described 4th diode D4.
Preferably, the parameter of above-mentioned diode is the most consistent.
One of the present utility model has technical effect that, can electrostatic charge be released within the shortest time, simultaneously
Increase internal circuit or the antistatic capacity of back-end chip position.
By detailed description to exemplary embodiment of the present utility model referring to the drawings, of the present utility model other
Feature and advantage thereof will be made apparent from.
Accompanying drawing explanation
The accompanying drawing of the part constituting description describes embodiment of the present utility model, and uses together with the description
In explaining principle of the present utility model.
Fig. 1 is the schematic circuit of electrostatic protection apparatus according to an embodiment of the invention.
Fig. 2 is the schematic circuit of electrostatic protection apparatus in accordance with another embodiment of the present invention.
Detailed description of the invention
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should also be noted that it is unless another
Illustrating outward, the parts illustrated the most in these embodiments and positioned opposite, the numerical expression of step and numerical value do not limit
Make scope of the present utility model.
Description only actually at least one exemplary embodiment is illustrative below, never as to this practicality
Any restriction that is novel and that apply or use.
May be not discussed in detail for technology and equipment known to person of ordinary skill in the relevant, but in suitable situation
Under, described technology and equipment should be considered a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
Fig. 1 is the schematic circuit of electrostatic protection apparatus according to an embodiment of the invention.
As it is shown in figure 1, include being connected between holding wire and earth terminal according to electrostatic protection apparatus of the present utility model
First discharge cell 110 and the second discharge cell 120.Wherein:
Described first discharge cell 110 is positioned at and is arranged at the interface position of electronic equipment, including the first diode D1 and
The positive pole of the second diode D2, described first diode D1 connects earth terminal, the negative pole and the two or two of described first diode D1
The negative pole of pole pipe D2 connects, and the positive pole of described second diode connects holding wire.In this way, can be by by by seam
The electrostatic sealed in imports to ground, to prevent it to be coupled to the internal circuit of rear end.
Described second discharge cell 120 is arranged at the internal circuit position of electronic equipment, including the 3rd diode D3 and
The positive pole of the 4th diode D4, described 3rd diode D3 connects earth terminal, and the negative pole of described 3rd diode connects described the
The negative pole of four diode D4, the positive pole of described 4th diode D4 connects holding wire.In this way, in can will be coupled into
The electrostatic of portion's circuit imports ground, thus prevents circuit from damaging further.
Described holding wire includes importing the power line of electrostatic, holding wire or BUS bus etc..
Described interface includes the USB interface of radio frequency interface, blue tooth interface, wireless lan interfaces or wired connection, power supply
Interface etc..
Described first discharge cell 110 is arranged with the interface position of electronic equipment at, refer to relative to the second electric discharge
For unit, the first discharge cell 110 is closer to the interface with electronic equipment, and the second discharge cell 120 is closer to electronics
The internal circuit of equipment or inside chip.
In sum, the electrostatic at interface position will can be sealed in by first according to the electrostatic protection apparatus shown in Fig. 1
Discharge cell 110 imports earth terminal, and is coupled to interior location or the electrostatic of inside chip position, can be by the second electric discharge
Unit 120 imports earth terminal, thus has effectively played the effect of protection chip.Additionally, each discharge cell uses diode even
The mode connect is compared to field effect transistor or audion, and its attachment structure is simple, has the effect of two-way electrostatic discharge.
Fig. 2 is the schematic circuit of electrostatic protection apparatus in accordance with another embodiment of the present invention.
As in figure 2 it is shown, this electrostatic protection apparatus includes the first discharge cell 210 and the second discharge cell 220.Implement at this
In example, including the first diode D1 shown in Fig. 1, the second diode D2, the 3rd diode D3 and the 4th diode D4.
Alternatively, described first discharge cell 210 also includes and described first diode D1 and described second diode D2
The positive pole of the 5th diode D5 being connected in parallel and the 6th diode D6, described 5th diode D5 connects described first diode
The positive pole of D1, the negative pole of described 5th diode D5 connects the negative pole of described 6th diode D6, described 6th diode D6's
Positive pole connects the positive pole of described second diode D2.In this way, put against connecting interface at the first discharge cell 210
Put, and further increase an electrostatic leakage path, it is ensured that within the shortest time, electrostatic is imported ground, to reduce
The electrostatic impact on back-end circuit.
Alternatively, described second discharge cell 220 also includes and described 3rd diode D3 and described 4th diode D4
The positive pole of the 7th diode D7 being connected in parallel and the 8th diode D8, described 7th diode D7 connects described 3rd diode
The positive pole of D3, the negative pole of described 7th diode D7 connects the negative pole of described 8th diode D8, described 8th diode D8's
Positive pole connects the positive pole of described 4th diode D4.In this way, the second discharge cell 220 is provided closer to inside
The position of circuit, can will be incorporated into the electrostatic of internal circuit within the shortest time from seam or other positions or interface
Release, further enhancing the antistatic protection function of internal circuit.
Alternatively, the parameter of above-mentioned diode is the most consistent.The parameter of diode selects suitably to select according to reality application, for
Make simple in construction, same type can be selected, the diode that parameter is consistent.
Further, it is also possible to increase further in the first discharge cell 210 and the second discharge cell 220 according to actual needs
Electrostatic leakage path.
Electrostatic leakage path according to the electrostatic protection apparatus shown in Fig. 2 particularly as follows:
Such as, when electrostatic induced current S0 introduces at interface, electrostatic charge is respectively by including the Article 1 path (S1) of D1, D2
Import ground rapidly with the Article 2 path (S2) including D5, D6.
And when only using the first discharge cell, when introducing due to too high electrostatic potential (such as, more than 10KV), electrostatic
Electric charge can discharge rapidly, and during release, rapid due to electric charge moves, generation magnetic field in charge transfer process, and this
Magnetic field is easy to produce the voltage of coupling, and is further coupled to the position of internal circuit or back-end chip, or when electrostatic from
When other interfaces or other positions introduce, the first discharge cell can be caused to lose efficacy and damaged internal circuit.Therefore, the second of setting
The charge discharging resisting that discharge cell can couple is to ground, i.e. by including the Article 1 path (S3) of D3, D4 and including the of D7, D8
Two paths (S4) import rapidly ground, thus serve the effect of protection internal circuit.By the dual release of electrostatic, Ke Yibao
Demonstrate,prove and consume a part of electrostatic, a part of electrostatic of releasing in internal circuit position, thus the electrostatic introduced or coupling in electrostatic porch
The electrostatic closed discharges substantially, farthest ensure that internal circuit will not damage.
Relative to the embodiment shown in Fig. 1, can be respectively at the first discharge cell according to the electrostatic protection apparatus shown in Fig. 2
Electrostatic leakage path is increased, it is ensured that electrostatic is led by mulitpath and/or the shortest path respectively with the second discharge cell
Enter ground, thus further reduce the impact on internal circuit or chip.
Although by example, specific embodiments more of the present utility model have been described in detail, but this area
It is to be understood by the skilled artisans that above example is merely to illustrate rather than in order to limit scope of the present utility model.This
Field it is to be understood by the skilled artisans that can be in the case of without departing from scope and spirit of the present utility model, to above example
Modify.Scope of the present utility model is defined by the following claims.
Claims (4)
1. an electrostatic protection apparatus, it is characterised in that include that the first electric discharge being connected between holding wire and earth terminal GND is single
Unit and the second discharge cell；
Described first discharge cell is positioned at and is arranged at the interface position of electronic equipment, including the first diode D1 and the two or two pole
The positive pole of pipe D2, described first diode D1 connects earth terminal GND, the negative pole of described first diode D1 and the second diode D2
Negative pole connect, the positive pole of described second diode connects holding wire；
Described second discharge cell is arranged at the internal circuit position of electronic equipment, including the 3rd diode D3 and the four or two pole
The positive pole of pipe D4, described 3rd diode D3 connects earth terminal GND, and the negative pole of described 3rd diode connects described four or two pole
The negative pole of pipe D4, the positive pole of described 4th diode D4 connects holding wire.
Device the most according to claim 1, it is characterised in that described first discharge cell also includes and described one or two pole
The 5th diode D5 that pipe D1 and described second diode D2 is connected in parallel and the 6th diode D6, described 5th diode D5's
Positive pole connects the positive pole of described first diode D1, and the negative pole of described 5th diode D5 connects the negative of described 6th diode D6
Pole, the positive pole of described 6th diode D6 connects the positive pole of described second diode D2.
Device the most according to claim 1 and 2, it is characterised in that it is characterized in that, described second discharge cell also includes
The 7th diode D7 being connected in parallel with described 3rd diode D3 and described 4th diode D4 and the 8th diode D8, described
The positive pole of the 7th diode D7 connects the positive pole of described 3rd diode D3, and the negative pole of described 7th diode D7 connects described the
The negative pole of eight diode D8, the positive pole of described 8th diode D8 connects the positive pole of described 4th diode D4.
Device the most according to claim 3, it is characterised in that the parameter of described diode is the most consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620673073.1U CN205863912U (en) | 2016-06-29 | 2016-06-29 | A kind of electrostatic protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620673073.1U CN205863912U (en) | 2016-06-29 | 2016-06-29 | A kind of electrostatic protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205863912U true CN205863912U (en) | 2017-01-04 |
Family
ID=57644922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620673073.1U Active CN205863912U (en) | 2016-06-29 | 2016-06-29 | A kind of electrostatic protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205863912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107357062A (en) * | 2017-07-21 | 2017-11-17 | 惠科股份有限公司 | Driving device of display panel |
-
2016
- 2016-06-29 CN CN201620673073.1U patent/CN205863912U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107357062A (en) * | 2017-07-21 | 2017-11-17 | 惠科股份有限公司 | Driving device of display panel |
| CN107357062B (en) * | 2017-07-21 | 2020-07-28 | 惠科股份有限公司 | Driving device of display panel |
| US11322931B2 (en) | 2017-07-21 | 2022-05-03 | HKC Corporation | Driving device of display panel |
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| GR01 | Patent grant |