CN110072327A - 4-Pin pad structure and printed circuit board - Google Patents
4-Pin pad structure and printed circuit board Download PDFInfo
- Publication number
- CN110072327A CN110072327A CN201810063633.5A CN201810063633A CN110072327A CN 110072327 A CN110072327 A CN 110072327A CN 201810063633 A CN201810063633 A CN 201810063633A CN 110072327 A CN110072327 A CN 110072327A
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- CN
- China
- Prior art keywords
- pad
- group
- pin
- pad structure
- shape
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/115—Via connections; Lands around holes or via connections
- H05K1/116—Lands, clearance holes or other lay-out details concerning the surrounding of a via
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09372—Pads and lands
- H05K2201/09381—Shape of non-curved single flat metallic pad, land or exposed part thereof; Shape of electrode of leadless component
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
Abstract
The present invention provides a kind of 4-Pin pad structure and printed circuit board.The 4-Pin pad structure includes: first group of pad, for connecting the first pin of current sense resistor, first group of pad is distributed in " E " shape, including first and third portion, first outer frame part as the distribution of " E " shape, the internal portion that third portion is distributed as " E " shape has interval, draws first voltage test point in third portion between third portion and first；Second group of pad, for connecting the second pin of current sense resistor, second group of pad is in anti-" E " shape distribution, including second and the 4th, second outer frame part as anti-" E " shape distribution, 4th internal portion as anti-" E " shape distribution has interval between the 4th and second, the 4th is above drawn second voltage test point.The present invention can improve the welding yield of current sense resistor while keeping high measurement accuracy.
Description
Technical field
The present invention relates to printed circuit board technology field more particularly to a kind of 4-Pin pad structures and printed circuit board.
Background technique
The test and display of cell-phone battery electric-charge quantity generally use voltameter (fuel gauge) and are tested, basic principle
It isWherein, QintialIt is known quantity for initial quantity of electricity；QremainFor remaining capacity.From above-mentioned formula
It is found that QremainMeasurement accuracy depends on time t and flows through the measurement accuracy of the electric current I of battery, and the measurement essence of time t at present
Degree is very high, to improve remaining capacity QremainMeasurement accuracy must improve the measurement accuracy for flowing through the electric current I of battery.
In order to improve the measurement accuracy of electric current, 106535463 A of patent CN discloses a kind of 4-Pin pad structure, the 4-
Pin pad structure includes two groups of pads, is separately connected the first pin and second pin of current sense resistor, every group of pad includes
Small one and large one two parts, as shown in Figure 1, the big pad portion of two of them area flows through electric current, the small pad of two areas
Almost no current flows through for part, and two small pads have only played the bridge joint of voltage measurement, will not introduce error voltage, therefore
It can be improved the measurement accuracy of electric current.
But in the implementation of the present invention, inventor has found to use existing 4-Pin pad structure, current detecting
Resistance is easy to appear small pad problem of faulty soldering during actual welding, and failure welding rate is high.
Summary of the invention
To solve the above problems, the present invention provides a kind of 4-Pin pad structure, the same of high measurement accuracy can kept
When, improve the welding yield of current sense resistor.
In a first aspect, the present invention provides a kind of 4-Pin pad structure, comprising:
First group of pad, for connecting the first pin of current sense resistor, first group of pad is distributed in " E " shape,
Including first and third portion, wherein described first outer frame part as the distribution of " E " shape, the third portion are used as " E " shape
The internal portion of distribution, the third portion and it is first described between there is interval, first voltage inspection is drawn in the third portion
Measuring point；
Second group of pad, for connecting the second pin of the current sense resistor, second group of pad is in anti-" E " shape
Distribution, including second and the 4th, wherein described second outer frame part as anti-" E " shape distribution, the 4th work
For the internal portion of anti-" E " shape distribution, described 4th and it is second described between there is interval, described 4th upper to draw the
Two voltage detecting points.
Optionally, second group of pad is set along the length direction of the current sense resistor far from first group of pad
It sets.
Optionally, second group of pad and first group of pad are centrosymmetric setting.
Optionally, the width in the third portion is less than the width that about first two horizontal parts divide, and, described the
Four width are less than the width of about second two horizontal parts point.
Optionally, one side edge and first open side edges of the third portion towards first open side
Edge is concordant, and, described 4th one side edge towards second open side and described second open side edge
Concordantly.
Optionally, the first voltage test point is drawn towards the side of first open side by the third portion, with
And the second voltage test point is drawn in described 4th side towards second open side.
Second aspect, the present invention provide a kind of printed circuit board, including above-mentioned 4-Pin pad structure, the 4-Pin pad
The current sense resistor is connected in structure.
The third aspect, the present invention provide a kind of mobile terminal, and the mobile terminal includes above-mentioned printed circuit board.
4-Pin pad structure and printed circuit board provided by the invention, the 4-Pin pad structure are symmetrical using two groups
The pad structure in the distribution of " E " shape being arranged, the opening direction of two groups of " E " shape pads is opposite, pad structure in this way, electricity
Detection resistance is flowed in welding without special SMT technique, under conventional SMT process conditions, it will be able to eliminate welding
The problem of drift, improves the welding yield of current sense resistor.
Detailed description of the invention
Fig. 1 is the pad layout schematic diagram of the 4-Pin pad structure of the prior art；
Fig. 2 is the pad layout schematic diagram of the 4-Pin pad structure of one embodiment of the invention；
Fig. 3 is the scale diagrams of the 4-Pin pad structure for 0805 encapsulation of one embodiment of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of 4-Pin pad structure, as shown in Figure 2, comprising:
First group of pad, for connecting the first pin of current sense resistor, which is distributed in " E " shape, packet
Include first A1 and third portion A3, wherein the outer frame part that first A1 is distributed as " E " shape, third portion A3 is as " E " shape point
The internal portion of cloth, third portion A3 and first A1 are to disconnect, and have interval therebetween, the first electricity is drawn on third portion A3
Press test point Sense_P；
Second group of pad, for connecting the second pin of current sense resistor, which is in anti-" E " shape distribution,
Including second B2 and the 4th B4, wherein outer frame part of second B2 as anti-" E " shape distribution, the 4th B4 is as anti-
The internal portion of " E " shape distribution, the 4th B4 and second B2 are to disconnect, and have interval therebetween, draw on the 4th B4
Second voltage test point Sense_N out.
It can be seen that third portion A3 from above-mentioned pad structure and be placed in the inside of first A1, and make first group of pad in " E "
Shape distribution, while the 4th B4 is placed in the inside of second B2, and second group of pad is made to be in anti-" E " shape distribution, two groups of " E " shape welderings
The opening direction of disk is opposite, pad structure in this way, and current sense resistor is in welding without special SMT work
Skill, under conventional SMT process conditions, it will be able to the problem of eliminating welding drift is not in welding drift in principle, thus
It can be improved the welding yield of current sense resistor.Further, during the test, electric current flows only through first A1 and
Two B2, almost no current flows through third portion A3 and the 4th B4, and third portion A3 and the 4th B4 only plays a voltage and survey
The bridge joint of amount acts on, and will not introduce error voltage, therefore can equally guarantee the measurement accuracy of electric current.
Preferably, second group of pad is arranged along the length direction of current sense resistor far from first group of pad.
Preferably, second group of pad and first group of pad are centrosymmetric setting, and entire pad structure is the axis side XY
To full symmetric structure.Two groups of " E " shape bonding pad opening directions are opposite, first A1 and second B2 central symmetry, third portion
A3 and the 4th B4 central symmetry, the interval between third portion A3 and first A1 are equal between the 4th B4 and second B2
Interval.
Preferably, the length direction for defining current sense resistor is the length direction of pad structure, defines current detecting electricity
The width direction of resistance is the width direction of pad structure.Width of the width of third portion A3 less than first A1 or more two horizontal parts point
Degree, and, the width of the 4th B4 is less than the width that second B2 or more two horizontal parts divides.
Preferably, third portion A3 is flat towards the one side edge of first A1 open side and the open side edge of first A1
Together, and, the one side edge of the 4th B4 towards second B2 open side is concordant with the open side edge of second B2.
Preferably, third portion A3 draws first voltage test point Sense_P towards the side of first A1 open side, with
And the 4th B4 draws second voltage test point Sense_N towards the side of second B2 open side, two lead-out wires are according to difference
Divide the form design of cabling.
The 4-Pin pad structure of the embodiment of the present invention for 0805 encapsulation current sense resistor when, each section it is specific
Size is as shown in figure 3, the unit of each number is that the closed side of mm, third portion A3 and first A1 have a 0.25mm in figure
Interval, the closed side of the 4th B4 and second B2 has the interval of a 0.25mm.This 4-Pin pad structure is especially suitable
For mobile terminals such as mobile phones, since current sense resistor is nearly all using 0805 small package, using this 4-Pin pad knot
Structure can greatly improve the welding yield of current sense resistor.By actual sample test, there are not the feelings of failure welding
Condition.
The embodiment of the present invention also provides a kind of printed circuit board, and the printed circuit board has above-mentioned 4-Pin pad knot
Structure connects current sense resistor on the 4-Pin pad structure, passes through the current sense resistor and carries out testing current and/or electric current
Detecting.
The embodiment of the present invention also provides a kind of mobile terminal, and it includes 4-Pin pad structure that the mobile terminal, which has above-mentioned,
Printed circuit board.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (8)
1. a kind of 4-Pin pad structure characterized by comprising
First group of pad, for connecting the first pin of current sense resistor, first group of pad is distributed in " E " shape, including
First and third portion, wherein described first outer frame part as the distribution of " E " shape, the third portion are distributed as " E " shape
Internal portion, the third portion and it is first described between there is interval, first voltage test point is drawn in the third portion；
Second group of pad, for connecting the second pin of the current sense resistor, second group of pad is in anti-" E " shape point
Cloth, including second and the 4th, wherein described second outer frame part as anti-" E " shape distribution, the 4th conduct
The anti-internal portion of " E " shape distribution, described 4th and it is second described between there is interval, described 4th upper to draw second
Voltage detecting point.
2. 4-Pin pad structure according to claim 1, which is characterized in that second group of pad is examined along the electric current
The length direction of measuring resistance is arranged far from first group of pad.
3. 4-Pin pad structure according to claim 1, which is characterized in that second group of pad and first group described
Pad is centrosymmetric setting.
4. 4-Pin pad structure according to claim 1, which is characterized in that the width in the third portion is less than described the
The width of about one two horizontal parts point, and, the 4th width is less than about second two horizontal parts point
Width.
5. 4-Pin pad structure according to claim 1, which is characterized in that opened towards described first in the third portion
The one side edge of mouth side is concordant with described first open side edge, and, described 4th towards described second is open
The one side edge of side is concordant with described second open side edge.
6. 4-Pin pad structure according to claim 1, which is characterized in that opened towards described first in the third portion
The first voltage test point is drawn in the side of mouth side, and, the 4th side towards second open side is drawn
The second voltage test point out.
7. a kind of printed circuit board, which is characterized in that the printed circuit board has as described in any one of claims 1 to 6
4-Pin pad structure, connect the current sense resistor on the 4-Pin pad structure.
8. a kind of mobile terminal, which is characterized in that the mobile terminal has printed circuit board as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063633.5A CN110072327A (en) | 2018-01-23 | 2018-01-23 | 4-Pin pad structure and printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063633.5A CN110072327A (en) | 2018-01-23 | 2018-01-23 | 4-Pin pad structure and printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110072327A true CN110072327A (en) | 2019-07-30 |
Family
ID=67365085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810063633.5A Pending CN110072327A (en) | 2018-01-23 | 2018-01-23 | 4-Pin pad structure and printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110072327A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337726A (en) * | 2020-04-10 | 2020-06-26 | 深圳市欣旺达电气技术有限公司 | Circuit structure based on patch shunt and current detection method |
| CN114552249A (en) * | 2022-01-17 | 2022-05-27 | 广东机电职业技术学院 | Debugging adapter plate and connector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2434252B (en) * | 2006-01-13 | 2009-03-04 | Siemens Plc | Component Current Measuring Arrangement |
| CN106535463A (en) * | 2015-09-15 | 2017-03-22 | 展讯通信（上海）有限公司 | Bonding pad structure and circuit for improving current detection accuracy |
| US20170280565A1 (en) * | 2016-03-24 | 2017-09-28 | BOT Home Automation, Inc. | Jumpers for pcb design and assembly |
-
2018
- 2018-01-23 CN CN201810063633.5A patent/CN110072327A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2434252B (en) * | 2006-01-13 | 2009-03-04 | Siemens Plc | Component Current Measuring Arrangement |
| CN106535463A (en) * | 2015-09-15 | 2017-03-22 | 展讯通信（上海）有限公司 | Bonding pad structure and circuit for improving current detection accuracy |
| US20170280565A1 (en) * | 2016-03-24 | 2017-09-28 | BOT Home Automation, Inc. | Jumpers for pcb design and assembly |
Non-Patent Citations (1)
| Title |
|---|
| 潘永雄，沙河: "《电子线路CAD实用教程-基于Altium Designer平台》", 31 December 2016 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337726A (en) * | 2020-04-10 | 2020-06-26 | 深圳市欣旺达电气技术有限公司 | Circuit structure based on patch shunt and current detection method |
| CN114552249A (en) * | 2022-01-17 | 2022-05-27 | 广东机电职业技术学院 | Debugging adapter plate and connector |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190730 |
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| RJ01 | Rejection of invention patent application after publication |