Questions tagged [esd]
ElectroStatic Discharge, it's caused by accumulation of electrostatic charge as a result of rubbing, and can damage semiconductor devices like integrated circuits.
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ESD protection when reverse stand-off voltage and required clamping voltage are close together
The circuit under consideration is to be powered by four 18650 li-ion cells in series. These cells are in a holder and user replaceable so there is risk of the contacts being touched and adding esd ...
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Can "fried" semiconductor devices recover themselves over time?
When this whole "smart soldering iron" craze was just getting started, I jumped on the bandwagon and got myself the very first revision TS100. What I also got then is the complete inability ...
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Ferrite bead value for a LIN bus protection circuit
What is the proper value for FB1 in relation to the surrounding capacitors in this diagram?
The FB1 resistance is measured to 0.76ohm and package size is 0603. All components are AEC-Q200 rated.
The ...
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PCB Design guidelines for "hot swapping"
I am designing a PCB with JST EH connectors, which are connected to a multi pin socket exposed to the user. The multi pin socket provides +24V, CAN H, CAN L and GND. I have experienced that the PCB ...
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Auxiliary mechanical anti-ESD measures
If a PCBA within a plastic enclosure is prone to malfunctioning due to ESD air discharge in proximity of enclosure seams and openings, but changing the hardware or plastic design is not an option, ...
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ESD protection: connect wrist strap to ESD mat or directly to grounding point
For our workshop, I'm thinking about buying a big ESD mat to cover the whole workbench (5.5 m), so it won't be a "ready to use" one, but a roll to cut to the right dimensions, and to which I ...
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What (semi-) permanent infrastructure be added to ESD harden an already-constructed space?
I have a newly-constructed university center which I would like to harden to ESD. Unfortunately, I became involved in the process too late to ensure that proper antistatic flooring was installed. At ...
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How can you protect exposed ground pins from ESD?
If I have a DC powered PCB that is floating (not tied to earth ground), and a human touches the ground plane causing an ESD event to occur, what can be done in terms of design to prevent damage to the ...
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Absolute Maximum ratings of a device
In most of the devices I have seen so far, the absolute maximum ratings of the pins of the IC are given with respect to voltage.
For example, the maximum voltage applicable on a pin would be something ...
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Plastic enclosure, ESD considerations
I am working on a product with three plastic components: an injection molded enclosure (Lexan, polycarbonate), a 3D printed mounting tray (ESD PETG, carbon nanotubes) onto which my PCB is mounted, and ...
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Can someone explain USB ESD-protection on Nucleo 144?
On the STM32 Nucleo-144 eval board, there are 3 different ESD protection devices for the USB port:
U19 = USBLC6-2SC6
U21 = ESDA7P60-1U1M
U22 = ESDALC6V1-1U2
Source:
https://www.st.com/en/evaluation-...
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Does ESD protection cause voltage leakage?
I have a this schematic for powering ESP32 over the usb and communicate PC with usb interface. It works perfect. But there is a interesting error. while I am powering ESP32 with Lipo battery (In case ...
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Alternatives for routing two pinouts to the same RJ12
I’m working on a project that is basically UART, power and a couple of I/Os over a RJ12 connector.
I want to be able to interact with two different devices that have the same interface but with ...
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Correct way of optical input EMC protection
I tried to find an answer online, but didn't find anything that would make my doubt go away.
The thing is: when you want to protect any input, that is referenced to ground, you use ground-referenced ...
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Is a 3D printed motherboard case ESD safe enough?
I am developing and 3D printing a case for the development boards (PYNQ) we use at our university. However, I have read online that PLA is quite bad for ESD protection. I found products for anti-ESD ...
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