June, 2017
www.us-tech.com Simplifying Automated Leakage Current Analysis Continued from page 53
software solution used information derived from its Cadence CAD land- scape. PCB-Investigator’s leakage current plugin now allows the selec- tion of distance parameters specified by the standards, as well as the selection of networks to be examined. The software uses a convenient
net group wizard plugin that creates groups of logically related networks, in order to perform analytics on all networks at once. For example, net- works within a bus system are cate- gorized and color-coded so they can be considered a single unit. Groups can also be created manually. The automated option can also be used to generate network group proposals. This is useful for leakage current analysis, because groups can be sort- ed according to their voltage profiles.
Calculating Distances The automatic leakage current
analysis calculates the shortest dis- tance from the outer edges of the con- ductive components to one another, and to the outer edge of the board. This also takes into account uncoated drill holes and indentations, which would otherwise be too time-consum- ing to calculate manually. Results are displayed as 3D
graphics for easy interpretation. This way, many manual measure- ment errors are avoided. Paths that lead around the edge of a board or around drill edges are measured diagonally, rather than measured with a simple right-angle manual measurement. For thicker stacks, these small deviations can add up and become significant. The results of the creepage dis-
tance and clearance analysis is shown as a percentage of the speci- fied distance parameters. For each calculated path segment between two points of contact, the software determines how much of the specifi- cation has been achieved. If it is less than 100 percent,
the vulnerable path is highlighted in the analytics report. PCB-Inves - tigator’s leakage current analysis plugin prioritizes data according to the likelihood of hazards. Since the inner layers of stacks have higher dielectric strength, they are evaluat- ed differently than those situated in other areas of a stack-up.
2D or 3D? SEW-EURODRIVE now uses
this software tool to test all of its products at once, significantly im - proving test speed. It can be done at any time during the development phase, addressing crucial problems early on. Aside from its functionality and
accuracy, the speed of the tool alone makes it superior to many other forms of leakage current analysis. Previous automated measure-
ments of air and creepage distances were done using 3D CAD programs. It may appear to be an obvious approach, especially for the dis- tances between conductors and the housing, or along components. But, similar to the software’s approach to thermal simulation, PCB-Inves - tigator saves significant computing power by performing all calculations in 2D, rather than requiring a 3D model. Only the relevant results are then displayed in 3D.
TAKAYA Currently, the leakage current
analysis tool is a custom solution, but EasyLogix is developing a standard PCB-Investigator plugin with an expected general market release before the end of 2017. Since the software can visualize
every aspect of PCB development and production, developers are able to correct many errors early on in the process. With powerful tools like this, it is easy to imagine a future without faulty manual work and damaged boards. Contact: Schindler & Schill
GmbH, Im Gewerbepark D33, 93059 Regensburg, Germany % +49-941-568-136-20
PCB-Investigator performs calculations in 2D, with a choice of 2D and 3D views.
TAKAYA The Flying Probe Experts TAKAYA set a NEW standard in high performance and overall test
coverage with the introduction of its Advanced Multi-Function Flying Probe Systems, the APT-1400F and the NEW APT-1400F-SL
Unprecedented Test Speed and Accuracy at the Probe Tip Architecture provides fastest and most controlled probe movement
6 Topside Flying Probes Provide Optimum Access Flexibility Four angled probes, two vertical probes (no angle)
LED Color Test Option Allows functional testing of LED “Color & Luminance”
New TOS-7F Color Camera & Vision system for AOI New high intensity dual LED light ring provides direct camera lighting
Standard Intergrated Functional Test Capability Newly designed high measurement unit Integrated 4 quadrant power supplies Frequency Measurement Capability
Programmable Function generator - Sine wave, Square wave, etc.
APT-1400F / APT-1400F-SL Multi-function Flying Probe Systems
E-mail:
guenther.schindler@
easylogix.de Web:
www.easylogix.de r
Page 57
TEXMAC, Inc.
3001 Stafford Drive. Charlotte, NC. 28208 Ph: 704-394-0314
www.texmac.com
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