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.
675
questions
1
vote
0
answers
38
views
What should be distance (gap) between Pack+ input and GND?
There is a BQ4050 battery management IC and its reference design schematic. In the below image, there is a spark gap symbol I think labeled as E2, E3, and E4 between battery inputs and GND. I want to ...
- 183
1
vote
1
answer
41
views
ESD protection device selection
I want to select a ESD protection IC for my circuit with the following conditions:
Battery based and ultra-low-power
Battery voltage 3.6 V
My sensitive chips inside my circuit has Absolute Maximum ...
- 511
5
votes
1
answer
216
views
Metal chassis grounding with wall wart supply, ESD test failed
We're building a device which takes its input power from a 12VDC wall wart PSU, and has a metal chassis. We just passed preliminary EMC/EMI test, but in the ESD test an 8kV jolt to the chassis killed ...
- 1,259
0
votes
1
answer
52
views
ESD on two different materials
I am conducting ESD testing on two types of materials with a setup that closely follows the 61000-4-2 standard. We have incorporated both isolation material and a ground plane into our setup.
When I ...
- 536
0
votes
2
answers
80
views
Is the blue Weller WECP-20 ESD safe? [closed]
There are two Weller WECP-20 soldering stations. One blue and one black.
The black one has a label "ESD SAFE" and the blue have no ESD label at all. But is the blue Weller WECP-20 still ESD ...
- 1,324
1
vote
3
answers
187
views
SPI device stops working when integrating Schmitt triggers and ESD diodes
I am integrating a BME680 temperature, pressure and humidity sensor using SPI.
When I only use 33 Ohms series resistors, the system works fine. However, when adding Schmitt triggers (NL27WZ17DFT2G), ...
- 179
7
votes
3
answers
261
views
ESD knocking out PHY on device with unisolated POE
I inherited this design, one problem I am having is ESD on the chassis knocks out the PHY, sometimes it can't even be reset via software. I am curious if anyone can spot any glaring errors with the ...
- 84.8k
0
votes
0
answers
48
views
Questions regarding TVS-diodes and grounding
I am currently working with solutions to pass the ESD-requirements for EMC. I have used TVS (ESD)-diodes in the past to good result, but never really understood exactly why they work. Sadly, this is ...
- 11
2
votes
1
answer
52
views
Can I mitigate risk ESD to a sensitive device with small insulating panels?
I have an electrostatic-sensitive device held in an aluminum block. It has to be aluminum for temperature control. I recently destroyed said device by touching the aluminum block on a low-humidity day....
- 123
0
votes
0
answers
46
views
Optocoupled Input (3..24V) overcurrent/ESD Protection
I'm designing relatively wide voltage range (3..24V) isolated input for reading the push-pull output state. Input source is going to be from a water counter, some 3-phase motor controllers, water ...
1
vote
0
answers
69
views
Medical device on patient's bed..Cannot earth the Chassis..How to provide ESD protection?
We are developing a medical device, which will sit on patient's bed. So, the medical device chassis can't be connected to earth. The powersupply of the device is isolated (2MOPP and 2 MOOP), medical ...
- 137
0
votes
1
answer
36
views
Need USB C cable / connector insulation voltage....and ESD on shield, will impact the internal signals
Any one know how much voltage the standard USB C cable insulation can withstand?..Also want to know shield to internal conductor insulation..If I apply ESD on the connector shield, will it impact the ...
- 137
12
votes
7
answers
5k
views
Tie all unused GPIO to GND?
Recently, during a discussion with a senior electronics engineer on an industrial project that operates at 48V and is housed within a metallic casing, a point of contention arose regarding ESD ...
- 847
4
votes
3
answers
643
views
TVS Diode current flow at breakdown
This was a question asked to us by our client.The question is
'We have a TVS diode with a break down voltage of 31V.When a pulse of amplitude 31.7V and a duration of 100ms second is applied the diode ...
- 2,593
4
votes
2
answers
530
views
Grounding ESD Table
I work in a manufacturing plant and we are setting up new ESD benches. Essentially, the table is grounded to the ceiling of the building and then multiple work benches are connected to that bench with ...
- 61