The **NCP303150** and **NCP303150D** are both integrated driver and MOSFET with integrated current monitor devices manufactured by ON Semiconductor ¹²³. The NCP303150D is a newer version of the NCP303150 ³. The main difference between the two is that the NCP303150D has an additional feature of **Zero Cross Detection (ZCD)**, which allows it to operate in synchronous rectifier (PWM) mode when ZCD_EN is set low ¹. The NCP303150, on the other hand, does not have this feature.

Voltage injection and thermal camera is a game changer

Hi Sorin, I believe that both MOSFETs are the same, the 'D' version is the older one (datasheet is from October, 2019 − Rev. 2) with the *OLD* ON-Semi logo, while the non-D version is the newer (and probably currently in production, with the *NEW* ON-Semi logo (datasheet is from July, 2022 − Rev. 3). That is most likely the reason that Mouser and such still have the 'older' version in stock. Hope this helps. Cheers.

modern vrm can protect the gpu in case of high side mosfet short. they do this by detecting the pulse width. if the pulse width exceed the threshold (indicating a shorted high side mosfet), the controller will turn the low side mosfet on, shorting the entire rail (crowbar action), thus protecting the gpu.

So I've compared both mosfet spec sheets and they are the same in term of dimensions, pins, output, everything but the D at the end of the name. In my amateur eyes they are the same component with a small name difference. But I am however just a Sorin videos watcher , enjoyer and student.

Thanks for this video! I had a similar situation recently with an ASUS ROG Ryzen 7... waiting for the replacement mosfet. I was not sure if device manager was a good check but I did check anyway and both graphics were "working properly", glad to be able to confirm that this is a good check to know if the GPU is good.

We may have to review our opinion about Lenovo after this miracle 😅

17:37 isint that third one on list with D on end I was reversing video 3 times to see and its it with D

All I can see is that the one without D is from the newer revision datasheet (r3 vs r2 on the D vatiant). And also, in the r3 datasheet, it says on first page bottom right: NCP303150/D Meaning, it goes for both. They should be equal.

9:58 it is nothing strange. As you well know you have two mosfets inside that chip. One is based on ground, second on 19v. if second is shorted then the 19v will pass and GPU will take it and die, but if first mosfet is shorted then the GPU will be taken to ground only so it will survive. very often the second mosfet dies (19v) but as you now see - not always.

2:27 ,those mosfets didn't have much contact with the thermal pad. see this on Dells too lately ,bent heatsink ,thin thermal pad?

Very interesting and a good learning today - thx Sorin

Now that's a massive power adapter - one of the biggest I've ever seen! Another video, another thing learnt 😎 I now know about phased power supplies so I shall keep an eye out for them on the next gaming laptop I see.

i dont know how it is on those FETS but some semi conductor manufacturers mark chips from their companies with some letters just to differentiate them from others but the function of the chip remains the same

U worked more on Intel/NVIDIA gaming boards and that's why it works because it's RADEON... Different architecture... and it makes it more interesting... Nice!

Another learning from Sorin! You're the best.

Interesting to see the test without one of the transistors, mine is 5 Pro version and goes directly to 1785MHz clock. But this video made Lenovo great again :D

Probably it's about marking for different beneficiaries. the version without 'D' is for the lenovo factory. and other manufacturers use the same system, in addition, the version without 'D' is subjected to more rigorous sorting tests, given the destination...

DigiKey lists both but the 'D' version is marked as absolete, both are on stock there.

Very good lesson!

Great job, I wish you success

Hi Sorin, please check it. The two chips you mentioned belong to the NCP303150 series from ON Semiconductor, but they differ in their package type. Here's the difference: NCP303150D: This chip uses a DFN-6 package (Dual-Flat No-Lead), also referred to as QFN-6. It's a package without lead pins that is mounted on the surface of a PCB. This type of package is commonly found in modern electronic applications and allows for space-saving and good thermal performance. NCP303150: This chip is the same as NCP303150D, but it comes in an SOT-23-5 package. SOT-23-5 is a smaller package with five lead pins and is often used in applications with limited space. In terms of their electrical characteristics and functions, these two chips are identical. The difference lies only in the package type, making the choice dependent on the type of mounting and space constraints in your design.

9:54 first time ever I heard you swearing on this channel! 😂 I hear you mate, it’s kind of a miracle! Maybe it has to do with the fact that the laptop was powered by the battery when the drmos got shorted (the customer said the battery was 50%, so I’m guessing he was using the battery), what do you think?

Im planing to get a power supply and modify the short protection circuit so it can supply power when there is a short. Some youtubers claim that bypassing the short circuit protection may cause track burning and damage on the board. I haven t played with current and voltage to find the short circuits but i think that setting the voltage and limiting the current bypassing the short protection should be just fine

Great content as always 🙏🏼🙏🏼🤘🏼🤘🏼🔥🔥

Hello If the low side MOSFET shorts before the high side may be the MOSFET chip takes the current.

good happy to see your having a good day

Awesome man, I fixed one of these with a dead webcam. The regulator was not outputting full voltage 😁

We always learn as much about physics as electronics on this unique site.

Finally a lucky customer 🎉

This is my exact laptop model! It truly is a nice one :)

Nice repair! A simpler one for you for a change.

Sorin, how do you know if this chip will work properly after you install new one without an oscilloscope? Isn't it a good idea to change all 5 of them?

if both mosfets share the same specs and pin layout, I dont see why it would not be the same. if it looks like a duck and qwack like a duck, its probably a duck.

Fitting the IC without the D will be fine. I've fitted many ICS with a B instead of a D and A where it should be a C. Never had a problem. Probably a revision marker but not sure.

The NCP303150 and NCP303150D are like two peas in a pod, or rather, two MOSFETs in a package. They're both high-performance, integrated driver and MOSFET solutions, perfect for high-current DC-DC buck power conversion applications. The only difference between them is their packaging. The NCP303150 comes in a standard package, while the NCP303150D is a "D" version, which means it has a slightly different package type. It's like the difference between a regular and a deluxe burger - same delicious MOSFET goodness, just with a slightly different bun.

That charger is for the Saturn rocket 🤣

Can you teach how to do this? technicals terminations execution? tks

It would be nice to see NCP303150 based homebrew PSU :).

Hello, you repaired so many laptops, could you please guide me: what is your opinion about best gaming laptop motherboard? which brand is the most durable components and good design for their motherboards? If you want to mention a gaming laptop brand, which brand and model would be your personal recommendation? All gaming laptops stop working as soon as they receive very little amount of static electricity on the motherboard and short circuits happen almost all the time. which brand you think has the best components and design on the motherboard that can survive shorts?

its the same chip, just a diferent batch production. I would just replace the mosfet with the D one, if it makes you feel better just replace all 5 of them... has other user said, the newer datasheet refers to NCP303150/D on the bottom right on the first page...

Hi sir and everyone. Can you tell me about check ohm on CPU , chipset, gpu good or not. Thank you. I'm from Cambodia

Hello sir just I want to ask if you solve the issue for lenovo yoga 910 the one was taking 5 volts only if you remmember , I have same issue with my laptop , no short circuit everything is fine but no 19 volts at all

Very interesting video

Modern crystals very often remain alive, and new drmosfets often take the entire blow, I don’t know what this is connected with, but recently in 90% of cases, after replacing the mosfets with a CPU/GPU, the crystal remains alive, this is normal in modern technology

just fyi the paste isnt actually a paste it's honeywell ptm 7958 thermal pad specifically designed for lenovo they use it on almost all of their laptops including the legion series

Dear Sorin, its a humble request to mention the year model and specifications of the laptop too for every repair you do. Thanks

Hello Sorin. The "D" on the mosfet represents the temperature range that the mosfet can handle. Unfortunately I cannot tell you what the correct temperature range is, but I see that you have the specs. Check the table to see if you can find the temperature range and compare it with the "D" version. Greatings Andy.

Is it safe to keep the laptop as it is now and undervoltag the gup? Is it ok? Cause i have the same problem one of 6 power MOSFET are removed but still working

this very interesting design

I would replace all the 5 MOSFETs with the D version or anything that's available cheap.

So I made a good choice. I bought the same laptop. 👍 Thanks for this video Sorin.

Hi, I have the same laptop. My dedicated gpu is not working in devices manager it is show the yellow sign error"Device not connected properly." I checked the board, and there are no shot circuits, but my Gpu is not heat up or anything. Should I reflow my Gpu soldier, and how risky is it

The path to ground through the other 4 MOSFETS and the 300W PSU would be a very low resistance. Do you think that could have saved the GPU?

D" suffix might indicate an extended temperature range variant of a component.

The chip/mosfet/drivers does have catastrophic fault detection. That helps a lot 💀💀😵😵

I wonder if some of these instances of blown mosfets are from people trying to get more out of a gaming laptop so they overclock and up the current on their GPU. Id never do this on any gaming laptop as I am quite sure most of them come pushed to the very limit already. Apart from that I would think faulty components.

why not use flux when you getting mosfet out from board I saw many times you do that. would it be more iz to its fluxed? Tnx

Anyone has idea what's wrong with my Lenovo legion 7? So the laptop boots up and there is a windows boot sound(you know the windows welcome sound) but no picture on laptop display or when i try to use HDMI cable on external display. Also no picture in bios mode. Ps: I have amd integrated and nvidia dedicated graphics as in this video.

i repaired a radio for a car a while back and ran into a similar issue. from what i could tell the added letter was to differentiate the old chip with the newer version. i could not find the original so we only had the option to get the new one and hope. everything worked out just fine with no issues. though it is a bigger risk for a GPU like that, but i would confidently use the D chip. it may be the new version that fixes the issue that killed the first chip series.

Is there any problem if it is the first GPU's PSU ? Thanks SORIN.

Good evening ! "D...." means Assembly Location. onsemi write this.

Could it be worth the trouble to change out all 5 MOSFETS? Then there will be 5 all the same. And the original ones can be bad.

10:10 never do it if you have any phase supply missing / desoldered. furmark, occt, and others - all draw maximum power / current. so first replace missing phase then apply heavy load test. You know it very well. I just remind you.

Very lucky customer!

Hi Sorin i have a question, can the feature "catastrophic fault detection" have saved the gpu ?

Maybe the short start on the low side mostfet? If its happend on high side mosfet you have 20v on gpu vcccore, so bye bye gpu... but if it is on the low side mosfet?

11:20 the fans are not on! thats why its running hot

ask google .. ooops Bard , when you don't know :-) not sure if it's relevant : The main differences between the NCP303150 and NCP303150D MOSFETs are as follows: Threshold voltage: The NCP303150 has a threshold voltage of 1.2 V, while the NCP303150D has a threshold voltage of 2.5 V. This means that the NCP303150 is more likely to conduct higher leakage currents than the NCP303150D. Maximum drain-source current: The NCP303150 has a maximum drain-source current of 2 A, while the NCP303150D has a maximum drain-source current of 4 A. This means that the NCP303150D can support higher loads than the NCP303150. Drain-source resistance: The drain-source resistance of the NCP303150 is 100 mΩ, while the drain-source resistance of the NCP303150D is 50 mΩ. This means that the NCP303150D has a lower resistance, which results in lower power dissipation. Maximum operating temperature: The maximum operating temperature of the NCP303150 is 125 °C, while the maximum operating temperature of the NCP303150D is 150 °C. This means that the NCP303150D can withstand higher temperatures than the NCP303150.

VCORE short on GPUs usually don't kill the GPU. VMEM short on the other hand.. kills the GPU and all VRAM most of the times.

9:59 LOL!!!!!!!!!!!

Educated guess? Probably the capacitor at the output of the mosfet power suplies has large enough capacity to keep the GPU suplied during the power cycle of the removed mosfet.

HI PLZ I NEED BOARDVIEW lenovo legion 5 pro MN F091 REV 1.0 OR SHEMATIC

Maybe it was playing just on the battery when the mosfer got shorted and in this case the current is not that high and GPU survive

the answer why the chip didn't go submarine, its answered in the begining of the video, it's a DESKTOP GPU chip, much tougher than the laptops ones.

I don't understand the bad reputation for Lenovo. I've been selling them for 10 years (along with Dell, HP and Acer). They are nice machines. Of course, you have to know what hardware to get - don't just get the $200 junk on display at Walmart.

the ncp have fault protection

what the difference between mosfet NCP303150D and NCP303150?

Do any followers of this channel know which brand power lead SORIN uses which connects to his linear power supply ? Thanks in advance PeaceFromOz

I am new here, why does he say at 0:30 "If we ignore the fact the is a Lenovo...". What is wrong with them?

0:35 basically a weapon

First "F" word from Sorin, he must have been very impressed about this job.

Sir, I am Sri Lankan. My laptop is acer aspiar E5-574G laptop. When the laptop gets sick, it cannot be turned on. At that time, I have to reset the BIOS and turn it on. Even after that, it won't turn on. I took it to three repair shops and it works as it was. Sir, I need help, tell me a way to make the lap. Thanks

Hello🤝 I think the GPU survived because it is AMD, or maybe the customer was lucky, and as for the mosfets, if everything is correct, and if the difference is only the letter D, then I think it's just a different manufacturer who how you label your product. Nice lesion 👍👍👍👏👏👏👏👏👋👋👋👋👋

First time Sorin is impressed with a Lenovo😂

hello, so what will happened if the grounded mosfet is shorted? nothing will happened to the gpu or cpu , the power will cut down after it goes to ground directly not by gpu, i think

As for the paste, you are not doing it right because you are heating it with hot AIR. The pastes are made for temperature transfer from surfaces

i mean im in the us but its like what less than 10 bucks i would just order the newer version is all i can tell from china so no mistakes you know better to do the job right first time even if its a little more cost than have to order again and wait

9:59 funny moment

D is for 🦆👈

Today's Laptop isn't Simple That We Think That is Why So Many Repair Station out there is Struggled😅

D = Properly Calibrated Version

D is the class of the Mosfet Sir Place The Normal Mosfet without D Work is Same

When the laptop is left on without the grease and heatsink, the laptop will shut down because of the overheating. That resets the power of the cpu, chipset, and vga.

D? maybe its from Dual?

D means Doggy, lol. 19:52

Sir can you make this video next please with D mosfet Love for Indian 🇮🇳

3 fase have 120° delay between each fase. On 2 fase is 180°

One day I`ll be that lucky as well. Got a gaming Laptop with dead GPU, even though no drmos is shorted. 😭😂

D for the same duck