All Questions
Tagged with esd circuit-protection
29
questions
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
1
vote
1
answer
151
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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 ...
- 79
0
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0
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135
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Does this circuit have a good enough ESD protection to protect I2C line or do I need a series resistor?
I want to be able to run a wire to an I2C device as far as posible for learning purposes, but I also want to know how to protect the I2C line from ESD events to exceed level 4 of IEC 61000-4-2.
I am ...
- 1
2
votes
2
answers
348
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TVS selection for 3,3V GPIO
It's usual in my electronics design to have external connectors where GPIO signals are routed. This GPIO lines are usually 3,3V and goes directly to the MCU in some cases. In this scenario, I put a ...
- 176
0
votes
1
answer
274
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Using a resistor only for ESD protection on an input to an op-amp
I have an input circuit like this:
The op-amp on the right is a buffer to a PIC24F. The IEC HBM is on the left. Elsewhere the circuit uses SMAJ43CAs, so initially the plan was to protect these inputs ...
- 145
0
votes
1
answer
48
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Dual transils in SOT-23
It would be probably good to protect N-MOSFET with its drain connected to a long (~1 m) piece of wire against ESD. The transistor has its drain-source maximum voltage 20 V, so I decided to choose <...
- 248
1
vote
1
answer
442
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ESD and overvoltage protection with varying clamping voltage
I am designing a PCB for analog multiplexing. I want to protect the signal lines against ESD and overvoltage.
The voltage in the signal lines shouldn't exceed the limits of the two supply voltage ...
- 13
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votes
0
answers
437
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How to best protect 12V from voltage transient spikes?
I am building an AC power supply and I decided to put digital current and voltage panel meters into it.
I have an issue where whenever my main contactor engages and disengages, there is a transient ...
- 1
4
votes
3
answers
526
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Polarity of TVS diode is unclear
I have a question regarding the DESD1LIN2WSQ TVS diode by Diodes Inc. which I want to use to protect some 24V IOs of a microcontroller board.
Until now, the TVS diodes I worked with always had the ...
- 2,803
5
votes
2
answers
845
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IC protection diodes confusion
This question is (loosely) related to my previous question here.
I wanted to check the ESD protection diodes of the LPC1114 MCU from NXP. So I measured all pins on a brand new LPC1114 MCU with a ...
- 7,653
0
votes
1
answer
132
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Communication Line Protection
I intend to protect a BUS switches ICs, whose voltage on its pins cannot exceed 5.5V and 3.3V. The current cannot exceed 16mA.
The circuits needs to opperate from 3.3V to 5V. But automotive ...
- 917
5
votes
2
answers
1k
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Do AC input optocouplers require an ESD protection?
I intend on using a circuit I designed for detecting an AC input line for control purposes. One of the inputs will be accessed by third party users and a cable might be connected with a decent length(&...
- 367
0
votes
0
answers
1k
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Protect ESP32 GPIO from ESD events, resets on inputs!
I'm working on a product that uses the ESP32 WROOM module. There are 6 exposed pins that user can touch, shown by the header attached. There is a piece of plastic that slides across a plastic ...
0
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0
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339
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ESD diodes - on what lines?
I'm just learning about the use of ESD diodes to protect your system.
Although I've read multiple cases on this being more a black box magic than true science, I'm still going to try.
On what 'signals'...
- 376
0
votes
1
answer
506
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Can I use USBLC6-2SC6 to protect 3.3V bus and lines?
In a small board where space is important I need to place ESD protections near some 3.3V bus with I/O lines (4 pin: 3.3V, GND, digital input, digital output).
The most sensitive IC to protect is an ...
- 1,235