Help identifying  ic in Crucial SSD - Page 1
Forum section: electronics / repair

author: ciccio
author_rank: Frequent Contributor
timestamp: July 10, 2019, 09:23:52 pm
content: Somebody reversed an HD power plug and three Crucial MX300 SSDs released tha magic smoke (they got 12 V instead of 5V).In each of them one IC, that is connected to 5 V dc in, literallly exploded.Impossible to read any marking on them.I got a working SSD, and the IC is a 8 pin mini SOIC, marked SLO.It seems a custom marking, no other letters or numbers, only SLOI've googled for SLO marking, but the only result is a 5 pin regulatorAny help or any informaion would be greatly appreciated.(I took a photo of the good IC, but until tomorrow I will not have access to the camera)Best regards

author: fzabkar
author_rank: Super Contributor
timestamp: July 10, 2019, 10:03:28 pm
content: I did a lot of work on Crucial SSDs at HDD Guru. There should be plenty of info there:https://www.bing.com/search?q=crucial+mx300+site%3Ahddguru.comI also have a large database of SSD and HDD ICs here:http://www.hddoracle.com/viewtopic.php?f=100&t=1577TLV62084, Texas Instruments, marking SLO, 2A High Efficient Step Down Converter, 2x2mm WSON, 8-pin, 2.7 - 6V Input:http://www.ti.com/lit/gpn/TLV62080

author: ciccio
author_rank: Frequent Contributor
timestamp: July 11, 2019, 11:47:15 am
content: Thank you very much for the informations.I see a little problem: the TI part has a different case than the actual part installed in the SSD, which seems a custom version.The part has no TI markings, only SLO, and is a micro TSOP (I don't know the correct name) with visible pins, whilst the TI part has a WSON package, with pads under the case.I will remove the damaged ones to see if there are pads under the case.A replacement could be attempted, but I see a lot of difficulties...I'll post about the results.Best regards

author: Monkeh
author_rank: Super Contributor
timestamp: July 11, 2019, 12:10:58 pm
content: I would suggest you do a little extra probing before attempting repair. I have an MX500 which suffered the same fate from a friend (Corsair power supply, by any chance?), not only is there a hole in the PCB around the one regulator, but several other power rails are shorted. Most likely unrecoverable.

author: ciccio
author_rank: Frequent Contributor
timestamp: July 11, 2019, 12:26:47 pm
content: Yes, it was a Corsair power supply.I think the user reversed the Molex plug powering a box housing 4 SSDs, and 3 of them (Crucial) blew, whilst the Samsung one survived.I'll check for other shorts.Best regards

author: Monkeh
author_rank: Super Contributor
timestamp: July 11, 2019, 12:29:44 pm
content: Quote from: ciccio on July 11, 2019, 12:26:47 pmThe SATA cables will readily plug into the PCI-E outputs at a slight angle and feel normal. They did not properly key them. Very expensive goof.

author: ciccio
author_rank: Frequent Contributor
timestamp: July 11, 2019, 03:12:33 pm
content: Bad news: I desoldered the ICs and I discovered that the case was actually the standard TI case, so a replacement could work, but tracks connected to pin 8 and 7 (input and PWM output) were burned beyond repair, and I could not follow them for soldering a bridge wire.Second issue: desoldering (with hot air) the burnt ICs was a nightmare, because of the tab under the case, so I realized that resoldering the replacement was beyond my capabilities and my humble equipment.Thanks to all members that spent their time for helping me.Best regards

author: fzabkar
author_rank: Super Contributor
timestamp: July 11, 2019, 11:04:43 pm
content: I suspect that the user may have interchanged modular power cables between two different PSUs. The pinouts for these cables are not standardised.Warning: do not interchange modular PSU cables:http://www.hddoracle.com/viewtopic.php?f=56&t=2545As for the SSD, it's a travesty that Crucial didn't spend the extra 10 cents on a 5V TVS diode (or a 5V e-fuse), as most other SSD manufacturers now do. If you need the data, you could mock up some external regulators and tap into the filter caps on the corresponding PCB rails.

author: Monkeh
author_rank: Super Contributor
timestamp: July 11, 2019, 11:36:04 pm
content: Quote from: fzabkar on July 11, 2019, 11:04:43 pmNo, it's just really easy to plug it in the wrong place on the Corsair ones.