CN112068022A - Current characteristic detection method and system of direct current power supply and related components - Google Patents
Current characteristic detection method and system of direct current power supply and related components Download PDFInfo
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- CN112068022A CN112068022A CN202010946898.7A CN202010946898A CN112068022A CN 112068022 A CN112068022 A CN 112068022A CN 202010946898 A CN202010946898 A CN 202010946898A CN 112068022 A CN112068022 A CN 112068022A
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000004088 simulation Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000004590 computer program Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000010009 beating Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The application discloses a method for detecting current characteristics of a direct current power supply, which comprises the following steps: after the voltage regulation module VRM is arranged at the pad, pad current regulation operation is carried out to enable the current of the pad area to be uniformly distributed; and setting load information and simulating according to a preset simulation mode to obtain a detection result of the current characteristic of the direct-current power supply. By the aid of the scheme, the phenomenon of edge concentration of current in the pad area is avoided, more accurate detection results of current characteristics of the direct-current power supply are obtained, and misjudgment is avoided. The application also provides a current characteristic detection system of the direct current power supply and related components, and the system has corresponding technical effects.
Description
Technical Field
The invention relates to the technical field of PCB design, in particular to a method and a system for detecting the current characteristic of a direct current power supply and related components.
Background
The direct current simulation of the power supply has the attention points of the current characteristics of the current passing through the PCB circuit, including generated voltage drop, current density, via hole current, electrothermal characteristics and the like. The current characteristics can be detected through direct current simulation, and then laying of a power plane can be improved according to a detection result, laying of VRM is improved, and electrical stability of the system is improved. In the direct current simulation, a plurality of current high-density points can be seen, and if the points are not optimized and improved, the points can cause serious problems of plate burning, local over-temperature, short circuit and the like after actual plate beating.
However, in the conventional simulation method, there is a problem of a point of wrong observation, that is, a point of wrong observation is not a problem originally but is recognized as a hot spot by mistake, so that the point needs to be improved by sacrificing a level surface of some other part, and the stability of other parts of the system is weakened. For such a situation, in practical application, some simulation engineers may know, from experience, that some hot spots do not constitute a problem, and thus may ignore some simulation hot spots by themselves, but the ignored simulation hot spots may be really without a problem or may be judged by the simulation engineers by mistake, and the misjudgment in the case of low current may be acceptable, but once the hot spot is located at a load power supply end with low voltage and large current, such as a CPU, serious consequences may be caused.
In summary, how to effectively improve the simulation accuracy to more accurately detect the current characteristics of the dc power supply is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a method, a system and related components for detecting the current characteristic of a direct current power supply, so as to effectively improve the simulation precision and more accurately detect the current characteristic of the direct current power supply.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for detecting current characteristics of a DC power supply includes:
after the voltage regulation module VRM is arranged at the pad, pad current regulation operation is carried out to enable the current of the pad area to be uniformly distributed;
and setting load information and simulating according to a preset simulation mode to obtain a detection result of the current characteristic of the direct-current power supply.
Preferably, the performing the pad current adjusting operation includes:
the pad for connection with the VRM is elongated, and a power supply port is provided at the cutoff end after the elongation.
Preferably, the performing the pad current adjusting operation includes:
the output of the VRM is set to the gradient voltage source.
Preferably, the power supply port provided at the cut-off end is a power supply port of a gradient voltage source.
Preferably, the gradient voltage source is a circular gradient voltage source, a circle center of the circular gradient voltage source is a position with the highest voltage value, and a circumference of the circular gradient voltage source is a position with the lowest voltage value.
Preferably, the voltage value of the center of the circle of the circular gradient voltage source is an upper limit value of the operating voltage range of the load chip, and the voltage value of the circumference of the circular gradient voltage source is a lower limit value of the operating voltage range of the load chip.
A current characteristic detection system of a direct current power supply, comprising:
the pad current adjusting module is used for performing pad current adjusting operation after the voltage adjusting module VRM is arranged at the pad so as to enable the current of the pad area to be uniformly distributed;
and the detection execution module is used for setting the load information and carrying out simulation according to a preset simulation mode to obtain a detection result of the current characteristic of the direct-current power supply.
Preferably, the pad current adjusting module is specifically configured to:
after the voltage regulation module VRM is disposed at the pad, the pad for connection with the VRM is extended, and a power supply port is disposed at a cut-off end after the extension.
A current characteristic detecting device of a direct current power supply, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the current characteristic detection method of the direct current power supply of any one of the above.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of detecting a current characteristic of a direct current power supply of any one of the above.
The applicant considers that in the conventional solution, as many voltage positive poles as possible are usually arranged on the pad, and since a great number of points are arranged in the pad and are all arranged at equal power supply voltages, a small equipotential surface is formed, so that no current exists in the inner area of the pad, the current exists only at the edge of the pad and has a large current density, the power supply equipotential surface is uneven, which is inconsistent with the fact and also influences the judgment of the simulation engineer. Meanwhile, due to the fact that current is distributed on the bonding pad in a non-uniform mode, after the current leaves the bonding pad and enters the copper sheet, a large current density can still be observed, if a through hole is formed in the adjacent position, the result that almost all the current passes through the through hole can be simulated, and the simulated through hole current is extremely distorted.
Therefore, in the scheme of the application, after the voltage regulation module VRM is arranged at the pad, the pad current regulation operation is performed to uniformly distribute the current in the pad area, and then the load information is set and the simulation is performed according to the preset simulation mode, so as to obtain the detection result of the current characteristic of the dc power supply. Because this application has carried out pad current adjustment operation and has made the regional electric current evenly distributed of pad, has avoided the marginal concentrated phenomenon of the regional electric current of pad, consequently has improved emulation precision, is favorable to reacing the testing result of more accurate DC power supply's current characteristic, avoids appearing the condition of misjudgement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of a method for detecting current characteristics of a DC power supply according to the present invention;
FIG. 2 is a schematic diagram of a current characteristic detecting system of a DC power supply according to the present invention;
fig. 3 is a schematic structural diagram of a current characteristic detecting apparatus of a dc power supply according to the present invention.
Detailed Description
The core of the invention is to provide a method for detecting the current characteristic of the direct current power supply, which avoids the phenomenon of edge concentration of the current in a bonding pad area, is beneficial to obtaining a more accurate detection result of the current characteristic of the direct current power supply and avoids the condition of misjudgment.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating an implementation of a method for detecting current characteristics of a dc power supply according to the present invention, where the method for detecting current characteristics of a dc power supply includes the following steps:
step S101: after the voltage adjusting module VRM is disposed at the pad, a pad current adjusting operation is performed to uniformly distribute a current of the pad region.
The applicant considers that in the conventional solution, as many voltage positive poles as possible are usually arranged on the pad, and since a great number of points are arranged in the pad and are all arranged at equal power supply voltages, a small equipotential surface is formed, so that no current exists in the inner area of the pad, the current exists only at the edge of the pad and has a large current density, the power supply equipotential surface is uneven, which is inconsistent with the fact and also influences the judgment of the simulation engineer.
Meanwhile, due to the fact that current is distributed on the bonding pad in a non-uniform mode, after the current leaves the bonding pad and enters the copper sheet, a large current density can still be observed, if a through hole is formed in the adjacent position, the result that almost all the current passes through the through hole can be simulated, and the simulated through hole current is extremely distorted.
Therefore, in the scheme of the present application, after a VRM (voltage regulator module) is disposed at the pad, a pad current regulation operation is performed to uniformly distribute a current of the pad region.
For example, in an embodiment of the present invention, the performing the pad current adjusting operation described in step S101 may specifically include:
the pad for connection with the VRM is elongated, and a power supply port is provided at the cutoff end after the elongation.
In this embodiment, when considering that the columnar conductor is connected to the power supply based on the circuit principle, although it can be regarded as an equipotential body in general, a certain voltage difference exists when actually observing different cross sections. In the conventional scheme, the pad is simply set to be in the equal voltage plane because the slight difference is not considered, and although the voltage difference is not large, the difference of the current distribution is infinitely enlarged, namely the skin effect occurs.
Therefore, in the embodiment, the pad for connecting with the VRM is lengthened, and the power supply port is arranged at the cut-off end after the lengthening, so that the edge concentration phenomenon of the current can be avoided. When the pad is extended, considering that the pad is usually square, in practical implementation, a rectangular copper sheet can be led out from the pad position, the width of the rectangular copper sheet can be the same as that of the original pad, and a new power port is generated at a cut-off end of the led-out copper sheet, wherein the cut-off end is the end far away from the original pad.
For another example, in an embodiment of the present invention, the performing the pad current adjusting operation described in step S101 may specifically include:
the output of the VRM is set to the gradient voltage source. In the embodiment, the power port of the VRM is set as the gradient voltage source, so that the edge area and the central area of the pad have current distribution, and the edge concentration phenomenon of the current is favorably avoided, namely, the current is favorably and uniformly distributed in the pad area. Of course, the specific form of the gradient voltage source can be set and adjusted according to actual needs.
Further, in an embodiment of the present invention, after the pad connected to the VRM is extended, the power port disposed at the cut-off end after the extension may be set as a gradient voltage source, that is, the power port disposed at the cut-off end is a power port of the gradient voltage source, which is beneficial to further improving the current density distribution in the pad region.
For example, in one embodiment of the present invention, the gradient voltage source is a circular gradient voltage source, the center of the circle of the circular gradient voltage source is the position of the highest value of the voltage, and the circumference of the circular gradient voltage source is the position of the lowest value of the voltage.
For example, in practical application, a position may be found on a copper sheet extending from a pad, 1 point is set at a central position as a center of a circle, a voltage at the point is set as a highest voltage value, m points surrounding the center of the circle are set as a circle, and voltages at the m points are all set as a lowest voltage value. For another example, n points may be set at the center position to be a circle, the voltages of the n points are all set to be the highest voltage value to form an inner circle, m points surrounding the inner circle are set to be a circle to form an outer circle, and the voltages of the m points are all set to be the lowest voltage value.
The setting mode of the circular gradient voltage source is simple, and the current density distribution condition of the pad area is favorably improved, so that the current is uniformly distributed in the pad area.
In addition, in the above specific embodiment, the voltage values at the highest voltage value position and the lowest voltage value position may be set and adjusted according to actual needs, and in order to avoid performing complex re-integration operation, in a specific embodiment of the present invention, a chip manual of the load chip may be referred to determine a numerical value, for example, the voltage value at the center of the circle of the circular gradient voltage source is an upper limit value of the operating voltage range of the load chip, and the voltage value at the circumference of the circular gradient voltage source is a lower limit value of the operating voltage range of the load chip. The numerical value setting mode is simple and convenient, and the implementation of the scheme is convenient.
Step S102: and setting load information and simulating according to a preset simulation mode to obtain a detection result of the current characteristic of the direct-current power supply.
Setting the load information and performing simulation according to the preset simulation mode may refer to a common simulation mode, and a description thereof is not repeated. Because the current of the pad area is uniformly distributed by performing pad current adjustment operation, the simulation precision is improved, and a more accurate detection result of the current characteristic of the direct current power supply is obtained.
It should be noted that after the simulation is finished and the detection result is obtained, the pad current adjustment operation needs to be cancelled, for example, the extended copper sheet is deleted, so that the PCB returns to the original PCB.
By applying the technical scheme provided by the embodiment of the invention, considering that the edge position of the pad and the current density are high in the traditional scheme, and the inner area of the pad has no current to cause false detection, therefore, after the voltage regulation module VRM is arranged at the pad, the pad current regulation operation is carried out to enable the current of the pad area to be uniformly distributed, the load information is set, and simulation is carried out according to the preset simulation mode, so that the detection result of the current characteristic of the direct current power supply is obtained. Because this application has carried out pad current adjustment operation and has made the regional electric current evenly distributed of pad, has avoided the marginal concentrated phenomenon of the regional electric current of pad, consequently has improved emulation precision, is favorable to reacing the testing result of more accurate DC power supply's current characteristic, avoids appearing the condition of misjudgement.
Corresponding to the above method embodiments, the embodiments of the present invention further provide a current characteristic detection system of a dc power supply, which can be referred to in correspondence with the above.
Referring to fig. 2, a schematic structural diagram of a current characteristic detecting system of a dc power supply according to the present invention includes:
a pad current adjusting module 201, configured to perform a pad current adjusting operation after the voltage adjusting module VRM is disposed at the pad, so as to uniformly distribute a current in the pad region;
and the detection execution module 202 is configured to set load information and perform simulation according to a preset simulation mode to obtain a detection result of the current characteristic of the dc power supply.
In an embodiment of the present invention, the pad current adjusting module 201 is specifically configured to:
after the voltage regulation module VRM is disposed at the pad, the pad for connection with the VRM is extended, and a power supply port is disposed at a cut-off end after the extension.
In an embodiment of the present invention, the pad current adjusting module 201 is specifically configured to:
after the voltage regulation module VRM is placed at the pad, the output of the VRM is set to the gradient voltage source.
In an embodiment of the present invention, the pad current adjusting module 201 is specifically configured to:
after the voltage regulation module VRM is disposed at the pad, the pad for connection with the VRM is extended, and a power supply port is disposed at an off-end after the extension, and the power supply port disposed at the off-end is a power supply port of the gradient voltage source.
In an embodiment of the invention, the gradient voltage source is a circular gradient voltage source, a center of the circular gradient voltage source is a position with the highest voltage value, and a circumference of the circular gradient voltage source is a position with the lowest voltage value.
In an embodiment of the present invention, a voltage value of a center of the circular gradient voltage source is an upper limit value of an operating voltage range of the load chip, and a voltage value of a circumference of the circular gradient voltage source is a lower limit value of the operating voltage range of the load chip.
Corresponding to the above method and system embodiments, the present invention further provides a current characteristic detecting apparatus of a dc power supply and a computer readable storage medium, which may be referred to in correspondence with the above. The computer-readable storage medium stores thereon a computer program that, when executed by a processor, implements the method for detecting a current characteristic of a dc power supply in any of the above embodiments, where the computer-readable storage medium includes a Random Access Memory (RAM), a memory, a Read Only Memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Referring to fig. 3, a schematic structural diagram of a current characteristic detecting apparatus of a dc power supply according to the present invention includes:
a memory 301 for storing a computer program;
a processor 302 for executing a computer program to implement the current characteristic detection method of the dc power supply in any of the above embodiments.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A method for detecting current characteristics of a DC power supply, comprising:
after the voltage regulation module VRM is arranged at the pad, pad current regulation operation is carried out to enable the current of the pad area to be uniformly distributed;
and setting load information and simulating according to a preset simulation mode to obtain a detection result of the current characteristic of the direct-current power supply.
2. The method according to claim 1, wherein the performing the pad current adjustment operation includes:
the pad for connection with the VRM is elongated, and a power supply port is provided at the cutoff end after the elongation.
3. The method according to claim 1, wherein the performing the pad current adjustment operation includes:
the output of the VRM is set to the gradient voltage source.
4. The method according to claim 2, wherein the power supply port provided at the cut-off terminal is a power supply port of a gradient voltage source.
5. The method according to claim 4, wherein the gradient voltage source is a circular gradient voltage source, a center of the circular gradient voltage source is a position of a highest voltage value, and a circumference of the circular gradient voltage source is a position of a lowest voltage value.
6. The method according to claim 5, wherein the voltage value at the center of the circular gradient voltage source is an upper limit value of the operating voltage range of the load chip, and the voltage value at the circumference of the circular gradient voltage source is a lower limit value of the operating voltage range of the load chip.
7. A current characteristic detection system of a direct current power supply, comprising:
the pad current adjusting module is used for performing pad current adjusting operation after the voltage adjusting module VRM is arranged at the pad so as to enable the current of the pad area to be uniformly distributed;
and the detection execution module is used for setting the load information and carrying out simulation according to a preset simulation mode to obtain a detection result of the current characteristic of the direct-current power supply.
8. The system of claim 7, wherein the pad current adjustment module is specifically configured to:
after the voltage regulation module VRM is disposed at the pad, the pad for connection with the VRM is extended, and a power supply port is disposed at a cut-off end after the extension.
9. A current characteristic detecting apparatus of a direct current power supply, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the current characteristic detection method of the direct current power supply according to any one of claims 1 to 6.
10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which when executed by a processor implements the current characteristic detection method of a direct current power supply according to any one of claims 1 to 6.
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