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Пікірлер
@ildarbelkin4851 21 күн бұрын
Hello. If Im right I see you set BW limit (1M). But if BW limit is turned off sqare wayforms have spikes (in my case ringing) at the end of rising or falling edges. Is it normal for synchronus DC DC buck converter? My RT6222 (Richtek) IC has more than 150 mV out put riples @ 5V 1A / 3.3v 1.5 A with 13V input. I can't understand what problem is. Im using layout exactly as perfomed in datasheet. I know about all layout restrictions for hi freq DC DC.
@salovamrani2084 Ай бұрын
I'm guessing the first one would be alright for an op amp, because an op amps have very low supply current am I correct?
@Cpt.Price123 27 күн бұрын
Yes, but I read that this method produces a bit of noise. if your application is in audio or precision then it's probably not a good idea.
@wellingtonpazmino58 3 ай бұрын
Excellent video, I have a question, you have technical information if there is any to design a DC DC converter with positive variable input and that has a DUAL symmetrical output (high power approx. 2A) of +15 VDC and -15 VDC. Know of some base design with the theoretical source and some switching regulator.
@ehsanbahrani8936 4 ай бұрын
Excellent. The best by far
@ehsanbahrani8936 4 ай бұрын
Excellent. Thank you Gentle man. All these channel contents are the best ❤
@patrickloibl3038 5 ай бұрын
Thanks for the great video! I have a question: Is there a way to dimm it via a pwm signal like from a arduino?
@MikesTropicalTech 5 ай бұрын
I'm looking to do this to measure ~ 150 VDC battery pack voltage in my electric car with a 3.3 volt Arduino board. Can this chip or another in the family handle such a high voltage on the input side, or should I use a resistor divider before the input?
@debashischakraborty6914 5 ай бұрын
I didn't understand one thing in the last method: why do we need an RC circuit for Pout and Pin? We could have taken 3 behavioral sources one for for V(IN)*I(IN) and V(Vout)*I(out) and last one for Pout/Pin.
@fellpower 6 ай бұрын
the good old Steinel HotAir Gun....lol
@eitantal726 6 ай бұрын
What is the simulation algorithm type and integration type you're running? I ask, because sometimes I get convergence problems if I touch any (But not all) initial conditions.
@fatigmakers 8 ай бұрын
It worked but very poor efficiency. But this video give me a very valuable knowledge. Thank you a lot. Hope you stay well since last video was 1 year ago. I hope you can keep it up.
@user-gi9vj9bq8n 9 ай бұрын
Is it cv cc?
@deplorablesecuritydevices 9 ай бұрын
Great overview!
@dulcemariapenadediaz2820 Жыл бұрын
Thank you now I understand best how solve application
@zingraffdocta3776 Жыл бұрын
a stupid question: i'm using lt8302 for a dc-dc converter. i've set up everything but when i start it up, the lt8302 doesn't switch. there is permanently di input voltage at the switch. how can i make it switch on and off ? that was the case in the simulation but i used the command .tran startup and it worked. what should i do now in reality?
@gocircuits3446 Жыл бұрын
Check for voltage on the VIN pin. Then verify that EN is 1.24V or greater. Next, verify that INTVCC is 3V. If these are all correct, you may have to resolder the part to make sure the ground pad is connected. Good luck!
@pfabri Жыл бұрын
Excellent summary!
@selva81652 Жыл бұрын
Nice, but I have one doubt, consider my Iout is 2A, what will be the current before the inductor, whether it is greater or lesser or equal to output current, can you say with any example, it will be very helpful
@idk2412 Жыл бұрын
Great video, thanks! Would be great if you did an isolated flyback (or whatever topology) that includes a TL431 and opto.
@gocircuits3446 Жыл бұрын
Many of the newer parts eliminate the need for an opto and TL431. You should consider something like the MAX17690, ADP1071, or ADP1074 to make your life easier!
@CircuitShepherd Жыл бұрын
👍
@pochuanpeng1729 Жыл бұрын
Thanks, it’s a great walkthrough. Please provide us more buck and ldo testing like this one.
@SpencerMckenithWilliams Жыл бұрын
Thanks a bunch for this information. I only wish I had this explanation while I was going through classes lol.
@rajakasilingam4403 Жыл бұрын
Hi can you please share lt spice design file ,
@ehlizbrothers6504 Жыл бұрын
Hello, i am trying to do the exact same thing(DC-DC BUCK converter), but im using a 9v battery, How do you propose i go about this. Note that this will be done on a bread board as well, can you give me an idea? Thanks.
@gocircuits3446 Жыл бұрын
I suggest starting with an inexpensive buck converter PCB from eBay and simply breadboard VIN, VOUT, and GND.
@ehlizbrothers6504 Жыл бұрын
@@gocircuits3446 okay let me explain better, I have a pic microcontroller, I really trying to learn how to use it, knowing fully well I could use arduino which is a bit easier(even tho it’s hard work) but I wanted to learn with a pic microcontroller
@gocircuits3446 Жыл бұрын
For powering a small device like a uController, an easier option would be to use a linear regulator like the LM7805.
@mr.return7361 Жыл бұрын
Very useful, thankyou very much man ❤
@qzorn4440 Жыл бұрын
great knowledge about the ltspice transformer simulation. can ltspice simulate an Analog Devices AD202KN transformer transformer with the opAmp all prepackage 🧐 thanks.
@abhireddy6113 Жыл бұрын
Hi, are the initial conditions applicable only for DC output values? Suppose that I am simulating an AC output waveform and if I want to provide an initial condition of RMS values of output voltages..how to right spice directive?
@eitantal726 6 ай бұрын
Pick a phase, then specify both the V and I, and you should be good
@islamsaeed9304 Жыл бұрын
Hope you attach your files used in the demonstration it helps ,thanks for your effort any way, appreciate
@ChikiChpoki Жыл бұрын
Cool! Very informative! Your video editing is great!
@ChikiChpoki Жыл бұрын
Concise and comprehensive. Thanks!
@JoaoAntonioCardoso Жыл бұрын
There is also another method, using .meas commands, then "Ctrl+L", specially useful for stepped simulations.
@huynguyenquang7060 2 жыл бұрын
I have used LT3763 but I don't solder the exposure pad as you, then my product wasn't working, when I put the load into the circuit, Vss (voltage soft-start decrease to 0V) and I put the load out the circuit, Vss increase 3.3V. So I want to ask you: " Is it necessary to solder the exposure pad? I'm looking forward to your reply? Thanks you.
@gocircuits3446 2 жыл бұрын
Yes, the datasheet says that "The exposed pad must be soldered to the PCB." This is my experience as well. Power parts with exposed pads need to have the pad soldered to create a low inductance ground connection. Sometimes you can get lucky for applications below around 3A, but above this you almost certainly need good grounding.
@huynguyenquang7060 2 жыл бұрын
@@gocircuits3446 Thanks for your answer
@AAFX-OM 2 жыл бұрын
This was amazing... Thanks for sharing boss.
@mehdiaghaei1792 2 жыл бұрын
Hello Thank you so much for this helpful video. can you please tell me how can I model the third winding (1-2)?.
@discodingo8839 2 жыл бұрын
just a quick dumb question...why would you isolate a DC voltage ?
@gocircuits3446 2 жыл бұрын
The reason I wanted this was to pass a control voltage from the primary side to the secondary side in order to adjust the output of an isolated switching regulator.
@Krzeszny95 2 жыл бұрын
Thanks for the video. I'm a complete beginner in LTspice.
@gocircuits3446 2 жыл бұрын
You're welcome. LTspice is a great tool.
@vatterger 2 жыл бұрын
The heatgun-from-below technique is such a nice way to do reflow soldering. Much cheaper than getting a hotplate and faster too.
@Telectronics 2 жыл бұрын
Very good and understandable explained ! If you want to make a lab power supply then you also have to introduce a op amp for current sensing does that mean that you have then two different compensations which adjust the feedback line ?
@gocircuits3446 2 жыл бұрын
Thank you. The short answer is that it does mean that you have two control loops. Parts that include a constant-current loop are usually compensated with one set of components. The LT3790 is one example. (FB and CTRL have separate amplifiers, with the amplifier outputs connected together at the VC pin.) Alternatively, the LT3840 gives you a separate pin (ICOMP) to compensate the part in constant-current. I hope this helps.
@Telectronics 2 жыл бұрын
One can make his life harder than it can be ! I wanted to go with the UC3842 first but your answer is clearly the easier way to go. That helps thank you very much sir 😃
@gocircuits3446 2 жыл бұрын
So true. Glad to help.
@vatsan2483 2 жыл бұрын
Woww Woww woww!! a New geeky channel to watch out for!! damn nice!! as a bachelor grad doing work on supercap model as well as PCB this is one of my favourite crossover.. would love a follow up on design of this system using Altium/Kicad design for this circuitary and more supercap application!! Kudos for this amazing content!!
@victorcastrellon4880 2 жыл бұрын
Great video. Thank you
@BibhasMandal73 2 жыл бұрын
This technique is good , but not the best option
@handryraya2853 2 жыл бұрын
Tq..you got a sub
@akashtanwar1939 2 жыл бұрын
Nice video. Well put.
@joechankimo 2 жыл бұрын
May I get your email? I want to ask some questions. Thx
@gocircuits3446 2 жыл бұрын
@dwalden74 2 жыл бұрын
Thanks for making this. Question: In your simulation it looked like there was about a 0.5ms response delay between input voltage and output current change. That seems quite long. Is this correct?
@gocircuits3446 2 жыл бұрын
Good point. I just looked at the PCB and it responds much faster. If you an issue with my simulation, please let me know.
@dwalden74 2 жыл бұрын
@@gocircuits3446 Any idea what the correct delay time actually is?
@gocircuits3446 2 жыл бұрын
Looks like it is on the order of microseconds.
@dwalden74 2 жыл бұрын
@@gocircuits3446 This is similar to some LED driver’s 3-in-1 dimming system. I spoke w Meanwell’s technical support about the response time, and they said it was instant (nanoseconnds). I’m curious if there’s another chip out there that will support an output greater than 36V?
@gocircuits3446 2 жыл бұрын
If we take the switching frequency of the ELG-100, which is up to 130KHz, then each switching cycle lasts 7.7usec. I am not sure how it is possible that the system could respond on the order of 1000x faster than a single switching cycle.
@akashtanwar1939 2 жыл бұрын
Awesome.
@johnchung5319 3 жыл бұрын
Very well done and well explained video!
@bobby9568 3 жыл бұрын
share the schematics
@gocircuits3446 3 жыл бұрын
I have added the link in the video description.
@pfabri 9 ай бұрын
Manners!
@akashtanwar1939 3 жыл бұрын
Nice one again.
@bobby9568 3 жыл бұрын
cool
@agnirudrapal 3 жыл бұрын
Amazing quality content.
@gocircuits3446 3 жыл бұрын
Thank you.