All Questions
47
questions
0
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0
answers
48
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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
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
0
votes
2
answers
61
views
How to select ESD TVS diode? [closed]
This is the following specification of my circuit
Vin 8V to 32V
The breakdown voltage should be 33V of TVS
I don't know what clamping voltage means please simplify it for me
What should be Vc?
- 117
4
votes
3
answers
1k
views
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 ...
- 1
7
votes
3
answers
3k
views
Unidirectional or Bi-directional TVS diodes - Which one to use?
I would like to understand in which places one should be using a unidirectional TVS diode and a bi-directional TVS diode.
In the USB power line, VBUS (5V), is it enough to place an unidirectional TVS ...
- 1
1
vote
1
answer
72
views
Why clamping voltage is not given for some ESD diodes
I was comaparing two ESD diodes.Their P/N's are PESD5V0S1BL,315 and
PESD5V0U1BL,315.
If you check the datasheet of both parts you can see that clamping voltage is specified for PESD5V0S1BL,315 and ...
- 2,593
1
vote
2
answers
107
views
Selection of ESD diodes
My objective is to protect the pins of a device.
The pins are connected to an external connector which might be exposed to an ESD event.
Hence, I need to place an ESD protection device on that line.
...
- 1
2
votes
0
answers
214
views
Suggestion for ESD Chassis Ground for Battery-Operated Device with Plastic Enclosure
We are developing a wearable device that is battery powered which is enclosed with a plastic enclosure. As a requirement for safety, we submitted the device for EMC testing, which includes Indirect ...
2
votes
3
answers
178
views
ESD Current path flow on this Diagram
I was reading about ESD diode arrays and protection devices and saw this question over here.
My question is:
In this diagram below, can someone help me to draw/identify the path of current flow ...
- 1
0
votes
0
answers
74
views
ESD Voltage for diode - Positive and negative transients
While selecting ESD protection diodes for, say, ethernet or usb datalines, we usually select the clamping voltage of the diode more than the working voltage of the signal lines and lesser than the ...
user220456
0
votes
0
answers
153
views
Position of TVS diode in Ethernet application
I'm going through this appnote.
My question is based on Figure 1 on page 1 of the datasheet.
Am I correct in understanding that it is not correct to move the TVS diode (DBI) from the PHY side of the ...
user220456
0
votes
0
answers
67
views
ESD Clamping diode specification
I'm using this Ethernet PHY
I've connected the ESD diodes on the Ethernet differential signal lines.
When I use this part the device is failing ESD.
When I use this part the device works fine.
Can ...
user220456
0
votes
3
answers
147
views
What are the parameters that I need to consider when selecting an ESD diode?
I'd like to know what the specifications are that I need to check in the datasheet of an ESD diode when selecting an ESD protection diode for high-speed interfaces such as Ethernet or USB.
I'd be very ...
user220456
0
votes
1
answer
171
views
Protecting Circuit - ESD
I'd like to know on how to select the transient protection circuit components for my Ethernet Interface.
I saw a reference design that uses a pair of UCLAMP3301D and 2.2Ω series resistors to the jack ...
user220456
5
votes
3
answers
901
views
MOSFET Vgs(max) and built-in Zener gate-source diodes
Some MOSFETs have a built-in ESD protection in the form of back-to-back Zener diodes between source and gate.
An example can be seen here.
DMG2302UK internal schematic
This particular MOSFET has a Vgs(...
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