I am looking for a logic level MOSFET, and it seems like for logic level MOSFETs, you will need to get an IRL MOSFET. However, I can't get my hands on one that is readily available. I found an IRF MOSFET, the IRF3708, and by looking at the spec sheet and comparing it to an IRL MOSFET like the IRLZ44N, it looks like it should be totally fine for logic level applications. We can see that from both the "Gate Threshold Voltage" and the VDS graph, the IRF MOSFET is very similar to the IRL MOSFET and should be fine for logic level applications. So my question is, can I use the IRF3708 for logic level applications?
I was reading two electronics stackexchange threads mentioning "DC Operation" as well as "Linear and Switching Application" in the context of MOSFETs.
https://electronics.stackexchange.com/questions/81234/selecting-a-mosfet-for-dc-use
I don't understand what these terms mean.
I assume switching application means the mosfet is turned on & off at a high frequency. How is this different from "DC Operation" & "Linear Application"?
I'm asking this because I was looking at a mosfet datasheet and noticed that it didn't have a DC SOA curve so I wanted to characterize this MOSFET and determine if it mattered.
For reference, I was planning on using a mosfet driving a low-current relay which energizes a high-current relay where the relays and mosfet are closed for 30 minutes upon the mosfet receiving a HIGH signal from an MCU.
I just added this protector IC into my Li-Ion charging schematic and I wanted to make sure I chose the proper mosfets for my application. Mosfet and Protection IC in the schematic.
I need to make sure my two parallel Li-Ion cells are protected from too much current being drawn along with other features brought by the BQ29700 IC. I selected this mosfet because it had similar specifications to the one used in the evaluation board here EXCEPT it has a continuous drain current of 6A which is what I want my battery to stay under. The idea is that if the load wants more than 6A, it can not get it because the IC triggers the gate of the mosfet and restricts any current flow.
Schematic subsection: https://drive.google.com/file/d/143FeT9ccliZUY7zW9iVrZh2HWmOMhzQE/view?usp=sharing
Entire Schematic: https://drive.google.com/file/d/1It4NY2glSd_nkb0aqiXAk3gKf6hKfItf/view?usp=sharing
Have I selected the correct mosfet? Have I made any schematic errors? Thank you!!
Hi, just want to double check my design. I have an IC with an active low reset pin, and have a transistor switch with a GPIO pin from my microcontroller tied to the gate (0 or 3.3V). I have these mosfets: link, and was wondering if the mosfet I already have would work with the given voltages? Also, what are some things I need to look for in the datasheet to determine if I can use it? I want to simulate it but I'm looking for a spice model for it.
https://preview.redd.it/drwalac0pnu51.png?width=925&format=png&auto=webp&s=490fdf802673f799f3c5f787fc5b87083c6e50f7
Duing some research into the varioud transistor types, I noticed that the MOSFET seems to have all the advantages compared to a BJT: it only requires a voltage at the gate and not current, it heats up less, it stays conductive after cutting signal to the gate unless you ground it, it can handle higher power and has a higher frequency of operation, so this made me wonder, what are the situations in which a BJT would be preferable?
Ok so to the point I'm trying to source a MOSFET that's n channel, can handle no less than 40 amps and upto 30v, max really would be 18v, but I need it logic level to control it with an Arduino.
The MOSFET is to run an electric Airsoft gun and so far the ones I've tried have burned up. I know I can use a PNP transistor to try and drive them but it adds to many parts to what needs to be a compact board design in the end.
Any help or suggestions would be great. Overall needs to handle atleast 40 amps at 18v while the Arduino drives it at around 5v max.
The global IGBT and Super Junction MOSFET market report is a comprehensive study that encompasses top manufacturers, prospective market share, revenue, purchaser volume with respect to dealing volume and global segmentation for the IGBT and Super Junction MOSFET industry. The report further includes market classification and definitions, product and industry overview, manufacturing specifications and cost structure, included raw materials and so on.
In addition to the vast definitive data, the report also sheds light on the past behavior of the market and an upcoming growth graph that is expected to venture in an upwards trajectory despite market fluctuations and trends.
Get Latest Sample for Global IGBT and Super Junction MOSFET Market Report @ https://hongchunresearch.com/request-a-sample/69
Market Segmentation:
The IGBT and Super Junction MOSFET report follows an accumulated research methodology that is based on years of experience combined with structured data points acquired from proprietary sources. These methods function with thorough research and analysis split between primary and secondary research combined with an in-house data wrangling process. In general, the data points are gathered from a variety of sources such as vendor projections, product list, research papers and a detailed list of manufacturers. The analysis is than derived into quantitative market values such as qualitative and quantitative qualities, market forecast models, market segmentations and business models that revolve around the IGBT and Super Junction MOSFET industry.
Moreover, the IGBT and Super Junction MOSFET market report clarifies the market segmentation based on various parameters and attributes that can be classified on geographical region, product types and market applications.
The reports shows the different types’ volume and Value in different applications. The major IGBT and Super Junction MOSFET Market (including USA, Europe, China, Japan, India, etc.) is analyzed, data including: market size, import and export, sale segment market by product type and applications.
Here are the dominant players in the IGBT and Super Junction MOSFET market report that were considered,
The major players in global IGBT and Super Junction MOSFET market include:
ROHM
Fairchild Semiconductor
STMicroelectronics
Toshiba
Infineon
Semikron
Mitsubishi
Fuji
ABB
Silvermicro
Starpower Sem
I'm working on a switching battery charger (LTC4002) with a load switch (LTC4412). Each controls a P-channel FET.
I did a preliminary part search, and now taking a closer look at it, it turns out that all the FETs I selected for the charger's DC-DC converter are suggested as parts for load switching, and all the ones I selected for the load switch are for DC-DC converters - every single one.
It appears to me that I might be systematically doing something wrong.
I narrowed down the parametric search by VDSs, VGSth, Id, then filtered out the ones with higher RDSon and footprints I didn't like, after that there wasn't very many left.
Here's some of the DC-DC converter FETs I picked out:
https://www.vishay.com/docs/68841/si4435dd.pdf
https://www.vishay.com/docs/64732/si4425dd.pdf
https://www.infineon.com/dgdl/irf9321pbf.pdf?fileId=5546d462533600a40153561125fc1d9b
The equivalent to the one now-obsoleted one used in the LTC4002 eval board is specified for DC-DC conversion.
Am I missing a parameter or are the suggested applications very loose and that was just the way my dice rolled?
It'd have to be mounted elsewhere in the shell, probably connected to a rev trigger with some kind of thin cord, and spring-loaded. Would it be a practical alternative to a MOSFET, reducing circuit complexity and points of failure? The only difficulty I can see is that those switches are generally not rated for many actuations, potentially leading to failure under extended use.
I'm working on a circuit to switch power to the load from a 2S li-ion battery to USB. The LTC4412 seems right for the job but I am a bit confused by the example application circuits.
Figure 2 doesn't work for me on its own because my auxiliary power source voltage will be lower than the voltage of the primary power source, so I would like to control the switch-over with the CTL pin as in Fig.4.
Fig. 4 circuit goes a bit beyond and uses "Back-to- back MOSFETs so that the drain-source diode will not power the load when the MOSFET is turned off" (pg.11) but it doesn't mention why this implementation might be preferable and I am not sure if it's necessary for my circuit.
Hey guys,
I am working on a satellite ground station transmitter right now for my university. I have purchased a RA13H4047M to amplify a -12dBm to 8dBm signal from a Melexis FSK evaluation board (EVB72015) to 3W to 5W or so to drive a 100W Henry Radio RF amplifier. The datasheet for the module indicates that with a certain gate and drain voltage, 50mW in will output 13W (see here, page 2/9). However, in the graphs below, I see the same voltages outputting almost twice that! Any ideas?
I am needing to build the module circuitry to boost the 8dBm signal or so up to 3W or 5W. From what I understand, linear operation will decrease the distortion, but lessen the output power. Is this module even going to give me the amount of gain I need in class-C (non-linear) mode?
I definitely would appreciate some advice here. I am technically supposed to have this completed and working by Monday, but I am doubting that will happen. I should at least have the control circuitry (power and data controls) done by then, but the RF section might not be finalized.
Thanks!
Hi,
i have this circuit below on a breadboard for testing and learning how to use transistors. I am using a IRZ44N N-CH FET (https://pdf1.alldatasheet.com/datasheet-pdf/view/17807/PHILIPS/IRFZ44N.html). The LEDs on the high side are the IR-LED from the Raspberry Pi camera (https://www.waveshare.com/wiki/RPi_Camera_(F)) and a 1N4007. I tested all components (IR-LED works fine when supplied with 5V directly from the rails, 1N4007 tested with multimeter) and also switched the IR-LED for a resistor and a red LED (works fine). On the gate, i have a momentary switch to trigger the FET.
Voltage drop across the IR-LED:
from rail (5.12V) to rail (0V) = 4.65V
from rail (5.12V) to Drain when FET is conducting = 1.25V
The voltage is quite low and i dont understand what i am doing wrong. For the 5V power supply i use an old 5V, 0.7A samsung USB charger. Could the current be too low for the IR-LED or do i use the MOSFET wrong?
Thanks in advance.
Hi all, I've been fighting to find a solution for a high current (60+ A, 12-15 V) normally open relay intended for long duration use (meaning closed for up to hours at a time). The relays I've tested so far waste too much energy as heat. So far I've looked at power relays, MOSFETs, and solid state relays.
In essence, I want that holy grail of a relay that consumes little power when closed, doesn't overheat, can be switched on for hours at a time, and preferably doesn't have moving parts. My background is chemistry, not EE, so I'm a little out of my depth. If you have a good idea, I'm happy to respond to your questions about chemistry :)
Now that I should hopefully be done with internship interviews for the rest of my life, here's a mega list of almost every interview question I was asked from 150+ interviews at Facebook, Apple, Amazon, Nvidia, Google, Microsoft, Qualcomm, Analog Devices, Texas Instruments, Northrop Grumman, SpaceX, Tesla, etc. This is going to be a massive step up from "part 1" that I posted a while back now that I have more coursework, internships, and interviews under my belt.
This was originally going to be part of the Interviews chapter of my internship search guide, but that post just got WAY too long so I decided to create a separate post just for this repository of questions. That post is still chock-full of interview advice and experiences, so check it out when it's ready! And before you get started, take a guess at how many questions this list has! (bonus points if you comment your guess because I'm also curious about your guesses!)
If you're reading this on Reddit (or not my website), check this post out on my website! You'll get this super cool table of contents bar that will make navigation much easier through this massive post. Any updates to this list will be reflected on my website, not this Reddit post or anything else. Also Reddit only allows posts up to 40,000 characters and my full list way exceeds that so you'll need to hop over to my website to get everything else. For some reason, Reddit has trouble recognizing my list so this Reddit post will have bullet points to identify questions, while my website has a BIG numbered list. And more importantly, you'll be giving me ad revenue!
Disclaimers and Notes
- These questions were for internships, but there's a lot of overlap with full-time (FT) interviews. In fact, I'm doing FT interviews at the time of writing this and they basically ask the same stuff, there are usually just more FT interviews so they have an opportunity to dive deeper and ask more questions I'd even say some of my internship interviews were harder/more in depth than my FT interviews. If the questions end up being super similar, I may just rename this post instead of making a new one lol.
- These questions are reflective of my s
I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.
Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.
Do your worst!
I'm surprised it hasn't decade.
For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.
I said "hey look, an escaPEA"
No one near me but it didn't half make me laugh for a good hour or so!
Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂
It really does, I swear!
They’re on standbi
Pilot on me!!
Nothing, he was gladiator.
