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Wanted: datasheet for SM4043 IC
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dicky96:
Hi Guys
I'm trying to find a datasheet with pin-out (and hopefully example application circuit) for this SM4043 chip
https://www.aliexpress.com/item/32812303910.html

I'm having no luck with google. Does anyone know where to find that?

best regards
Rich

amyk:
Do you have any information that can at least get the search started? What's it for, what is it found in, etc.?
Mechatrommer:
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.
dicky96:
@amyk
It 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.


Thanks
Rich
amyk:
That helps a lot--- I found this which gives the info

--- Quote ---SM4043, SILICON MITUS, MNT, VDD BOOST + VGH BOOST + VGL C/P + VCC BUCK + L/S + OPAMP + DISCHARGING + GPM + PVCOM, QFN, R/TP, 48
--- End quote ---
and 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.pdf  http://www.go-gddq.com/upload/2014-07/14072817168176.pdf

Searching 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.

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