Wanted: datasheet for SM4043 IC - Page 1
Forum section: electronics / projects

author: dicky96
author_rank: Regular Contributor
timestamp: August 13, 2019, 06:04:36 pm
content: Hi GuysI'm trying to find a datasheet with pin-out (and hopefully example application circuit) for this SM4043 chiphttps://www.aliexpress.com/item/32812303910.htmlI'm having no luck with google. Does anyone know where to find that?best regardsRich

author: amyk
author_rank: Super Contributor
timestamp: August 14, 2019, 01:08:16 am
content: Do you have any information that can at least get the search started? What's it for, what is it found in, etc.?

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 14, 2019, 05:39:12 am
content: its a china manufactured chip. since datasheet is not available online, i guess you have to go to the source to get it, ie through the asking aliexpress seller to ask from si tai china manufaturer and i bet it will be in chinese written.

author: dicky96
author_rank: Regular Contributor
timestamp: August 14, 2019, 08:03:40 am
content: @amykIt is used in LCD monitors. It seems to combine 2 or 3 buck power type circuits plus possibly some functions of gamma voltage supply for the LCD panel as well (a bit like AS15 IC but with more functions). That at least is my best guess what it does.I need the datasheet as I have Philips 234e monitor with TCON and Gamma functions built onto the panel edge PCB, which is proving tricky to diagnose. There is some problem with the power circuit associated with SM4043.ThanksRich

author: amyk
author_rank: Super Contributor
timestamp: August 15, 2019, 02:15:29 am
content: That helps a lot--- I foundthiswhich gives the infoQuoteand searching for "SILICON MITUS" reveals that the company does in fact exist and it is Korean:http://www.siliconmitus.com/--- perhaps try asking them?I also found a few service manuals mentioning the part, but none containing a schematic:http://www.go-gddq.com/upload/2016-04/16042618219711.pdfhttp://www.go-gddq.com/upload/2014-07/14072817168176.pdfSearching some of those terms, hoping it might be a clone of something else, I found the MB39A302, which is in the same package but maybe not the same pinout.

author: dicky96
author_rank: Regular Contributor
timestamp: August 15, 2019, 10:15:44 am
content: email sent to siliconmituswho would like to place odds on my getting the info from them?

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 15, 2019, 02:09:08 pm
content: i bet $1 they will ask your company cert and sign an NDA and buy 1K lot minimum

author: dicky96
author_rank: Regular Contributor
timestamp: August 15, 2019, 06:45:20 pm
content: Quote@amykYes mate if you look closer that link to badcaps forum is actually me discussing the problem with this monitor with another member there.As you will see if you read through the thread, with the best of our combined efforts the fault has not been resolved yet. I do have some SM4043 on order from aliexpress but while i'm waiting for them to arrive I thought maybe I would ask here to see if anyone who doesn't read badcaps has a datasheet for this device

author: boB
author_rank: Frequent Contributor
timestamp: August 15, 2019, 07:13:17 pm
content: Might be similar to this part but this one is 56 pins so they say...http://www.siliconmitus.com/main/sub2.asp?avan=1001020000&mcate2=0102000000&pro_title=0102030000&bs_code=pro_list&tbl_product2Mode=products_view01&intseq=101&pro_mcate2=0102030100&RD=SIBDJ0XNN3&And no pinout in the brief at least.They might just be able to get you some kind of information ! Maybe.... Or not...Or maybe it's more similar to this one which is 48 pins ?http://www.siliconmitus.com/avanplus/filedownload.asp?o_file=201805281707410134460.pdf&uppath=/upload/tbl_product/&u_file=SM4028_ProductBrief.pdfInteresting either way since I had never heard of this company before

author: dicky96
author_rank: Regular Contributor
timestamp: August 16, 2019, 08:13:07 am
content: Ho BoBYes it could be something similar to the SM4028 datasheet you linked but that one doesn't have any pin-out or example application circuit either. Sure it will be similar in function to that one.