Unanswered Questions
1,259 questions with no upvoted or accepted answers
5
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Cannot find what causes faults on DRV8353RH
I keep getting faults on a a new batch of ESC boards based on the TI DRV8353RH & Infineon IPT020N10N3ATMA1. Please consider:
When starting a motor at 48V - 56V the DRV asserts a fault after ...
- 111
5
votes
1
answer
506
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Parasitic capacitor current of an inductor
I am doing a double pulse test on SiC MOSFETs from 100-800 V and current from 20-80 A. The schematic is shown below (the values are not correct though):
In my first round of tests, I was getting a ...
CommunityBot
- 1
4
votes
0
answers
156
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High Frequency Oscillations on Mosfet Gate
I am working on a circuit that drives an inductor at its resonant frequency. However certain models of MOSFET I simulate the circuit with experience oscillations at the MOSFET gates as pictured below. ...
- 41
4
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155
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How to mitigate excessive ringing in VDS and VGS
I have a few questions regarding my measurement results in the lab for a double pulse test setup. There are three issues which I want to mitigate
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At turn-on interval, there is excessive ringing in ...
- 39.6k
4
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98
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FET between two grounds, could my circuit idea work?
I have a circuit that does not work as I intended/expected. It's been over a year since I worked on it, but recently Farnell send me the FET I originally intended to use but became "out of stock&...
4
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0
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52
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Snubbing an H-bridged motor
Mostly a follow up to https://electronics.stackexchange.com/questions/175778/rc-snubber-across-switch-or-inductor…
I've seen RC or RCD snubbers across the switching MOSFETs (and these damp the dV/dt ...
- 8,536
4
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59
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Sinking an input when pulses are above a certain frequency
I'd like to use a liquid flow meter of type YF-S401 at 12VDC. It produces 1.7-35k pulses per minute (rise time: 0.04us, fall time: 0.18us).
I want to trigger a sinking input of a controller board if ...
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190
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Review of electric circuit with Arduino
I am currently working on a project for which I am in charge of the electronic circuit. Since I have never worked with electronics before, I am really desperate and unsure whether what I am doing is ...
Null♦
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4
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203
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Fixing overshoot in current regulation of AC electronic load
My AC electronic load (previous question here) shall have a constant-current mode. It is being simulated in LTspice.
@devnull helped design the circuit for AC loads, but for simplicity's sake in the ...
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How to determine Vds(on) and Vds(off) for switching loss calculation?
In the Infineon Application Note, two of the parameters they've used to calculate the switching loss of the MOSFET are Vds(on) and Vds(off).
Is the Vds(off) the blocking voltage?
Where do they obtain ...
4
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answers
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MOSFET Without Gate Resistor is Failing
I have two MOSFET circuits; one is working and the other fails and I'm not sure why. I just want to turn on/off the LED, nothing special, no fast switching.
Below is the working circuit (series gate ...
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4
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2k
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How to use MOSFET in avalanche mode?
I'm thinking of a very simple circuit to generate high voltage pulses, like this:
simulate this circuit – Schematic created using CircuitLab
The MOSFET in this case will turn on until the ...
- 3,491
3
votes
0
answers
55
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Very High Spike and Unusual MOSFET Gate Switching Signal
My apology if I describe something wrong in this question, English is not my native language. I've been trying to work on a bidirectional converter simulation, but there are a few problem I met with ...
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3
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1
answer
82
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Transient Negative voltage on NMOS causing channel to open?
This is my first post here. I am an electrical engineer looking to cure my madness because a 2N7002 NMOS is doing things I cannot explain. If you look into the attachments, you will see some screen ...
- 38.9k
3
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56
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Which parameters should be compared to to replace N-MOSFETS with different package but with same pin functionality?
Since NTZD3154N is used a lot in my design, and I have BSS138PS only for used for one circuit, I want to replace BSS138PS with NTZD3154N in the following DP++ Auxiliary Conversion Block:
Note: This ...
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