Need Help for Datasheets

[rxyzm]

Hello,

I am looking for datasheets for following 2 SMD modules. They are on my MSI GL63 8RE Laptop mother board. And, I think they control power to Nvidia Graphics chip.

1. SMD 5 pin package (Seems to be SOT-353 type); 3 pins on one side, 2 pins on the opposite side, package code AEG (or AEC - the last character was not visible well).

2. SMD 8 pin package (Seems to be SOT-553 type); 4 pins of each side, Package has 2 lines printed on it. Letters are centered. First line - EN; second line - G84J. This chip appears to be a controller for LDO side mosfets in the supply. There are 3 chips driving 6 mosfets.

it is more like
=| en |=
=| G84J |=

(= represents set of 2 pins).

Will certainly appreciate any help provided.

Warm Regards,

[mon2]

Re: Need Help for Datasheets

Hello yaar. Please post a clear picture of the device and upload here for a review.

[rxyzm]

Re: Need Help for Datasheets

Here are the pictures of the chips.
1st photo has AEG and EN/G84J together. Second photo has EN/G84J.

Hope this helps.

Warm Regards,

[mon2]

Re: Need Help for Datasheets

I think the 'AEG' is a single AND gate from Texas Instruments.

p/n SN74AHC1G08DCKR

https://cdn.badcaps-static.com/pdfs/...5fa68f9ab2.pdf

[rxyzm]

Re: Need Help for Datasheets

Thank you Mon2. Appreciate your help.

While we are on this topic, I have a question.

The EN in EN/G84J - Whether it is a product code or Company Id? if it is company id, which company is it?

Reason is, I can find some products (various pin configurations) for product code EN, but none of them is 8 PIN form that I have on that board.

Similarly, for G84J, I can find products with product codes G8, but no products for code G84 or G84J.

Therefore, I am wondering whether it is custom numbered for MSI by the Semiconductor supplier....

Warm Regards,

[R_J]

Re: Need Help for Datasheets

Best I can find for the EN chip is this: https://www.aliexpress.com/i/4000196892825.html

I have found FAN2502S26 with AEG marking

[rxyzm]

Re: Need Help for Datasheets

Hello R_J,

Thank you for your kind help. Appreciate it.

Looking at the circuit where this AEG and EN/G84J parts are involved, I think they are the drivers for the mosfets that provide supply to Nvidia GPU on the MB.

I see a 0 resistance between the +ve rail and Ground in the GPU area. I found 0 resistance across pin 4 and pin 8 of all 3 EN/G84J chips. There is some resistance between the gate and Source/Drains of the mosfets connected to EN/G84J and pin 4 connects to mosfets. The source and drains of High side and the low side mosfets show 0 resistance. However, since the pair of mosfets connected to each of EN/G84j, are pumping current in parallel in to the supply rail, one shorted EN/G84J can cause issue across all three mosfet pairs. The mosfets are 87350D from TI.

For me it is important to understand the function of EN/G84J and whether there should be 0 ohm resistance between pin 4 and pin 8 of it. It is possible that they are tied together through a PCB track to probably make the chip work in certain function.

I have a very low value resistance in CPU power area too, but since there is bit of resistance, currently I am not focusing much on it.

What I am trying to do is understand the function of power management block to get a better idea of the lay of power land.

I do have regulated power supply where I can vary voltage and current independently. I am aware of voltage injection method. But, I do not want to use it as first line of attack as it can impact GPU, CPU. And, that will be a whole new ball game.

Warm Regards,