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 Post subject: SSD Sandisk with the voltage regulator with packaged broken
PostPosted: January 11th, 2022, 16:13 
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Joined: August 26th, 2021, 17:52
Posts: 16
Location: Brasil
Hello to everyone?

Last week a client brought me a ssd from sandisk, model: sdssd-240g, the drive did not give
id and when i took a look in detail in the board I observed 2 components broken. The first component is the protection diode, which if I polarize in both way is in short circuit and is slightly broken like is appreciated in the bottom.jpg

The other component is a voltage regulator called U1, and part of the package is broken like is appreciated in up.jpg and vr.jpg, and when I measure voltage in L4 I only get 0.0v. Even after I remove the diode I have the same results, for the moment I don't remove the voltage regulator. The pc3k indicated to me a consumption of 0,15A.

In U1 I can appreciated 2 markings 6336 BN and dACH27, I try to search the marking in google without result and i look to the post in hddoracle about “Datasheets for SSD and Flash Drives Ics” (http://www.hddoracle.com/viewtopic.php?f=100&t=1577). Putting the board in angle I could count part of the bga balls and I estimate this package musta have 20 bga pads.

If any one can help to find the component I want to try if mouser or digikey have this component for sale.

Thanks very much for anyone who read my post
My best regards


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up.jpg
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bottom.jpg [ 1.36 MiB | Viewed 838 times ]
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 Post subject: Re: SSD Sandisk with the voltage regulator with packaged bro
PostPosted: January 11th, 2022, 16:40 
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Joined: September 8th, 2009, 18:21
Posts: 13800
Location: Australia
I suspect that "633" is a YWW date code. It seems to match the "1616" date code on the controller and maybe the "1631" text on the PCB.

Can you identify IC2 (the dual step-down converter)? Perhaps it is manufactured by the same company.

Alternatively, you could try to connect an external supply to the junction of C20 and L4. Which chips are powered from this supply? You could answer this question by testing for continuity with the small bypass capacitors located around and under the major ICs.

What voltages did you measure at L2 and L1?

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 Post subject: Re: SSD Sandisk with the voltage regulator with packaged bro
PostPosted: January 12th, 2022, 17:56 
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Joined: August 26th, 2021, 17:52
Posts: 16
Location: Brasil
fzabkar Thanks very much for all the help you give me answering my posts!!!

IC2 doesn't have the model engraving in the package, only two markings which I believe must be the date code, 68d3 and v092.

Trying to find which components are powered by U1 I realized the board has a major short circuit. I am trying to figure out which voltage line (3,3V – 2,5V – 1,8V) is the short circuit. And something is very curious the ssd dont warm out


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 Post subject: Re: SSD Sandisk with the voltage regulator with packaged bro
PostPosted: January 12th, 2022, 18:59 
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Joined: September 8th, 2009, 18:21
Posts: 13800
Location: Australia
You may need to remove the IC to determine whether it is shorted, or whether the short is in the load.

"V092" appears to be a PMIC manufactured by Texas Instruments.

I couldn't find it on TI's web site, though:

https://www.ti.com/packaging/docs/partlookup.tsp#divline

The following ICs appear to be similar.

LM10524TMX/NOPB, Texas Instruments, marking V088 - Triple Buck Power Management IC (PMIC) for SSDs
http://www.ti.com/product/LM10524
http://www.ti.com/lit/ds/symlink/lm10524.pdf

LM10524TMX-A/NOPB, Texas Instruments, marking V089 - Triple Buck Power Management IC (PMIC) for SSDs
http://www.ti.com/product/LM10524

LM10507, 3x Programmable Buck + 2.5V 250mA LDO Power Management IC (PMIC), marking V087, DSBGA (34):
http://www.ti.com/lit/ds/symlink/lm10507.pdf

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 Post subject: Re: SSD Sandisk with the voltage regulator with packaged bro
PostPosted: January 19th, 2022, 7:52 
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Joined: August 26th, 2021, 17:52
Posts: 16
Location: Brasil
Just an update, the controller is bornout I remove the controller and the short circuit is gone.

Thanks for the help


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