Author Topic: IC SMD offline LED controller  (Read 749 times)

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Offline salviadorTopic starter

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IC SMD offline LED controller
« on: July 28, 2021, 09:38:12 am »
what is this component IC 6  pin SMD?, the datasheet is not found

It is of an offline LED control

PIN4 looks like the gate command for the mosfet


1239988-0
1239990-1
1239992-2
 

Offline fzabkar

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Re: IC SMD offline LED controller
« Reply #1 on: July 29, 2021, 06:29:45 pm »
Can you tell us the markings on the other semis and passives? This would help us to determine which numbers represent date codes.
 

Offline salviadorTopic starter

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Re: IC SMD offline LED controller
« Reply #2 on: July 30, 2021, 08:26:57 am »
It is a step down converter type

1240437-0
 

Offline fzabkar

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Re: IC SMD offline LED controller
« Reply #3 on: July 30, 2021, 10:20:30 pm »
I'm trying to eliminate date codes from the markings. For example, is "613" a YWW date code (eg week 13 of 2006 or 2016)? You could possibly answer this question by examining the date codes on the capacitors or MOSFET.

Also, I can't see how the IC connects to the supply negative.
« Last Edit: July 30, 2021, 10:23:04 pm by fzabkar »
 

Offline salviadorTopic starter

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Re: IC SMD offline LED controller
« Reply #4 on: July 31, 2021, 08:31:38 am »
you're probably right it looks like week13 2006

so it's the date, I got confused thinking it was the codec

exactly the mass! , This IC  seems that it exploits the voltage drop in the mosfet + shunt resistor
theoretically the mass looks like it is in pin 2


The mosfet
1240720-0
 

Offline fzabkar

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Re: IC SMD offline LED controller
« Reply #5 on: July 31, 2021, 05:46:27 pm »
http://www.1mos.com/upload/file/AUK/SMK0465FJ.pdf

The second line of the MOSFET markings is "GYMDD".

G : Factory management code
YMDD : Date Code (year, month, date)

76907 -> Sept 07, 2006/2016
« Last Edit: July 31, 2021, 05:50:52 pm by fzabkar »
 


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