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 Post subject: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 12th, 2020, 3:21 
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Joined: May 12th, 2020, 3:12
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Location: Italy
Please help me for find this component or any info.
Micro bga 6 ball
Enter a 3,3V and out 0V


Thank you for any info
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Sandro


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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 12th, 2020, 3:38 
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Could we see the whole PCB? Sometimes it is easier to identify the IC when it is viewed in the context of its surroundings.

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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 12th, 2020, 4:04 
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I suspect that the part may be a load switch or a P-channel MOSFET, probably controlled from the DevSlp input.

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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 12th, 2020, 4:29 
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It's not the correct part, but it could be something like this:

https://www.onsemi.com/pub/Collateral/FPF1039-D.pdf

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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 12th, 2020, 5:06 
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Joined: May 12th, 2020, 3:12
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Location: Italy
Thank for this help.
check all boards, used in Kingston and Hinix.
I think is this component, try to confirm pinout whit DEVSLP pin.
thanks!


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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 12th, 2020, 16:41 
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If this IC is the main load switch, then its On/Off pin should be controlled via DevSlp (pin #38).

http://www.hddoracle.com/download/file.php?id=7418&mode=view

The Vout pin should connect to the Vcc pins of the DC-DC converters. You photo is too poor, but I managed to find a clearer photo with Google. AFAICT, two of the regulators are marked with "AZ".

MP2162, Monolithic Power, Synchronous Step-Down Converter, marking AZ, 2A, 6V, 1.5MHz, QFN-8:
https://www.monolithicpower.com/pub/media/document/MP2162_r1.03.pdf

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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 14th, 2020, 3:21 
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In this photo, the chip looks more like a fixed LDO regulator:

https://cdn.mos.cms.futurecdn.net/LDpLp4YTVFL5bxYr577MeE-1182-80.png

The small black square devices near the AZ parts appear to be load switches for standby mode.

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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 14th, 2020, 3:42 
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I think those 3 square ICs are probably something like these:

https://www.onsemi.com/pub/Collateral/NCP435-D.PDF
https://www.onsemi.com/pub/Collateral/NCP333-D.PDF
http://www.ndone.cn/Uploads/image/file/20190801/20190801164219_79444.pdf
https://www.infinite-electronic.sk/datasheet/3c-NCP433FCT2G.pdf

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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 14th, 2020, 7:04 
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there was a similar problem, I still did not figure it out ..


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 Post subject: Re: SK Hynix SC308 hfs256g39tnd-n210 need a component name
PostPosted: May 15th, 2020, 16:13 
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BrandonMllr wrote:
there was a similar problem, I still did not figure it out ..

It's simple enough.

If the IC is a load switch (which I now doubt), then run a wire link from Vin to Vout. DO NOT do this unless you are certain that this is indeed the function of the IC..

If the IC is an LDO regulator (which I now believe), then replace it with any suitable LDO with the correct Vout. For example, if Vout =1.8V, then you could substitute an LM1117-1.8.

One thing that needs to be confirmed is whether there is a short between Vout and ground, in which case I would suspect a bad controller or bypass capacitor.

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