AllSpice
/
ArchimajorDemo
Archived
25
Fork 0
Files Issues 8 Design Reviews 2 Projects Releases 3 Activity

Failing 4KV ESD Contact Discharge #2

New Issue
Closed
opened 2022-12-14 23:51:19 +00:00 by AllSpiceAlice · 0 comments
AllSpiceAlice commented 2022-12-14 23:51:19 +00:00
Contributor
Copy Link

Disclaimer: The following data is fictional and does not represent real-world performance of the Archimajor Rambo Board

Summary

v0.4 of the Alpha main board fails required spec: 4KV contact discharge at endstop inputs.

Failure Mode(s): 10/10 cases SAM3X processor enters reset condition. 2/10 cases, memory is corrupted.

image

Analysis

Atmel SAM3X (pg. 1378) specifies max VDDIO operating voltage of 4.0V. Contact ESD discharge with no alternate ground path exceeds this value with significant energy content.

Simulation Results

The following simulation shows the circuit response to 4K discharge with no ESD protection.

image

image

image

Disclaimer: The following data is fictional and does not represent real-world performance of the Archimajor Rambo Board ## Summary v0.4 of the Alpha main board fails required spec: 4KV contact discharge at endstop inputs. Failure Mode(s): 10/10 cases SAM3X processor enters reset condition. 2/10 cases, memory is corrupted. ![image](/attachments/4c767d3b-c403-4402-952d-7c6f7d3ae387) ## Analysis Atmel SAM3X (pg. 1378) specifies max VDDIO operating voltage of 4.0V. Contact ESD discharge with no alternate ground path exceeds this value with significant energy content. ## Simulation Results The following simulation shows the circuit response to 4K discharge with no ESD protection. ![image](/attachments/2d6885ab-158a-43ff-9f52-3cf4706eb65f) ![image](/attachments/bad2d0df-cd2b-4281-b185-abdce7db473b) ![image](/attachments/ef77850d-c073-4b34-b655-b680a3f76145)
image.png
224 KiB
image.png
49 KiB
image.png
137 KiB
image.png
231 KiB
AllSpiceAlice added the
4 - high
bug
 labels 2022-12-14 23:51:44 +00:00
This repo is archived. You cannot comment on issues.
No Branch/Tag Specified
Branches Tags
main
alliefixbug
develop
refresh_repo
R17
V2.0_LTE
Rev1
v1
Version1.0
2.0
1.0
v0.1.0
v0.2.0
Labels
Clear labels   
1 - idea

Nice to have or idea to capture

  
2 - low

Should be resolved eventually

  
3 - medium

Should be resolved before product launch

  
4 - high

Should be resolved before next release

  
5 - critical

Must be fixed immediately - blocking item

  
bug

Something doesn't work

  
dfm

Design for manufacturing consideration

  
documentation

Improvements to supporting documentation

  
eol

End of life component

  
feature

New feature or request

  
firmware

Requires FW attention

  
layout

Requires PCB layout attention

  
mechanical

Requires ME attention

No Label
1 - idea
2 - low
3 - medium
4 - high
5 - critical
bug
dfm
documentation
eol
feature
firmware
layout
mechanical
Milestone
Clear milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
No Assignees
1 Participants
Due Date
The due date is invalid or out of range. Please use the format 'yyyy-mm-dd'.

No due date set.

Dependencies

No dependencies set.

Reference: AllSpice/ArchimajorDemo#2
No description provided.
Delete Branch "%!s(<nil>)"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?