Questions tagged [safe-operating-area]
The safe-operating-area tag has no summary.
19 questions
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What failures can occur in a SATA HDD 3.5" and controller when +12V power to the HDD is held? [closed]
If, after turning off power to the entire ATX x86 PC, a voltage above 10V is maintained on the +12V SATA HDD 3.5" power line for more than one second, what failures might occur in a (simple non-...
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Max oscilloscope voltage at BNC
I know this question has already been asked, but some inconsistencies are bugging me and I wanted to find a definitive answer.
I have recently bought a Rigol DHO924s.
The silkscreen on the device and ...
- 33
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Why does the Rdson limit from a MOSFET’s SOA graph not match its output characteristics curve?
The datasheet for the IPG20N06S4L has an SOA curve that shows the minimum on resistance is 50mOhm, whereas its output characteristics curve shows that you can achieve a 21.27mOhm on resistance. How do ...
- 375
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When SOA graph isn't on the spec sheet?
Sometimes the spec sheet for a MOSFET or a BJT has a Safe Operating Area graph and sometimes it doesn't. When it doesn't, is it safe to assume that the transistor can handle the maximum current at the ...
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SOA Mosfet Confusion
I am using mosfet (IRHJ9A7234) as a load switch and Id current is about 0.7A and maximum Rds from datasheet is 110mohm. So I thought based on power calculation P= I^2*R = 77mW which is way below than ...
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Understanding the safe operating area for low values of Vds
I am designing a circuit where a logic level signal switches an NPN BJT (Q1A) which turns a P-channel MOSFET (Q2) on as a high-side configuration to power a load (...
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Confused about the safe operating area of a MOSFET graph
Say I am operating a MOSFET 20A DC and the voltage drop across the drain and source (VDS) is 2V. The operating point is red as shown in the safe operating area (SOA) of the MOSFET as shown below. ...
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How to determine the maximum safe turn on/off time for a mosfet?
Background
I have been considering using the VOM1271 photovoltaic gate driver with an N-channel mosfet to do simple on/off (no PWM) high-side switching of circuits up to 84V (previous question for ...
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Safe Operating Area
This is my LDO. 3A part.
Input is 12V
Output is 5V.
Load current is 2A.
As per Figure 2-41 on page 15, at 85degC, I am limited to 0.2A of max load current.
How can I get the 2A load current with the ...
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Difference between Safe Operating Area (SOA) of two MOSFETs
I want to compare the Safe Operating Areas of two MOSFETs based on the graphs given by the manufacturers in the datasheets.
Our application is a 24 V inverter. What I concluded based on the ...
- 367
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What are the safety and OSHA protocols involved in water in electrical switchyard?
Just saw a meme online:
Is this safe? What could go wrong?
- 167
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Why do trench MOSFETs typically have a narrower FBSOA than planar MOSFETs?
I've often heard that trench MOSFETs have a narrower FBSOA than planar MOSFETs due to their cell design. The explanation I've commonly seen is that the cell design has a negative Rds(on) temperature ...
- 11.4k
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SOA and varying VDS
In a hot-swap application the FET spends some time in the linear region/Saturation region before it moves into the ohmic region.
Here is a snippet of the turn on waveform seen for a FET:
Yellow is ...
- 767
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103
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Compromising between Inrush and turn on time for MOSFET SOA operation
A hostwap controller as the shown here is used to to precharge and control a high side load:
In a hotswap control Q1 will spend some time in the saturation region during start up and turn off to ...
- 767
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How to compute the SOA of a MOSFET?
Is there any tool to check if a MOSFET is within its SOA or not for a given operating condition?
