Unknown MOSFET logo

[Phil Hobbs]

Hi, all,

I'm trying to identify this part, which is probably an N-FET:

<https://electrooptical.net/www/sed/UnknownMOSFETlogo.png>

Octopart, LCSC, and the usual datasheet sites come up dry.

Anyone recognize the logo and/or part number?

Thanks

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

I don't recognize it but from what I see of the board it is an EEPROM of some sort or similar. If it has custom data in it of course the manufacturer can do you no good.

If you got the gizmos and software you can access the data in it, but if it is in question that data could be corrupt.

I do not believe it to be a MOSFET. It looks like pins 5-8 are all grounded and they use the ones on the other side, like many eight pin EEPROMs. If it is a MOSFET I can see the four pins to the ground plane for heat sinking, but the other four, why four ? You got gate, source and drain. All four of those pins have feedthroughs on them.

Bottom line is I do not believe this to be a MOSFET, I believe it is an EEPROM. If you have reason to believe I am wrong I am listening.

 

[John Larkin]

On Sun, 16 Jun 2019 13:23:04 -0700 (PDT), jurb6006@gmail.com wrote:

I don't recognize it but from what I see of the board it is an EEPROM of some sort or similar. If it has custom data in it of course the manufacturer can do you no good.

If you got the gizmos and software you can access the data in it, but if it is in question that data could be corrupt.

I do not believe it to be a MOSFET. It looks like pins 5-8 are all grounded and they use the ones on the other side, like many eight pin EEPROMs. If it is a MOSFET I can see the four pins to the ground plane for heat sinking, but the other four, why four ? You got gate, source and drain. All four of those pins have feedthroughs on them.

Bottom line is I do not believe this to be a MOSFET, I believe it is an EEPROM. If you have reason to believe I am wrong I am listening.

Looks like a dual mosfet to me.


--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Phil Hobbs]

On 6/17/19 12:26 AM, John Larkin wrote:

On Sun, 16 Jun 2019 13:23:04 -0700 (PDT), jurb6006@gmail.com wrote:

I don't recognize it but from what I see of the board it is an EEPROM of some sort or similar. If it has custom data in it of course the manufacturer can do you no good.

If you got the gizmos and software you can access the data in it, but if it is in question that data could be corrupt.

I do not believe it to be a MOSFET. It looks like pins 5-8 are all grounded and they use the ones on the other side, like many eight pin EEPROMs. If it is a MOSFET I can see the four pins to the ground plane for heat sinking, but the other four, why four ? You got gate, source and drain. All four of those pins have feedthroughs on them.

Bottom line is I do not believe this to be a MOSFET, I believe it is an EEPROM. If you have reason to believe I am wrong I am listening.

Looks like a dual mosfet to me.

Well, it's mounted on the backlight controller board of a 65-inch
monitor, positioned between an AS3824 16-channel LED driver, a 3-ohm
source resistor, and a string of LEDs.

It's a dual MOSFET similar to a Vishay Siliconix Si7922DN.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

I guess I was wrong then. So do you have to replace this thing or what ?

 

[Phil Hobbs]

>I guess I was wrong then. So do you have to replace this thing or what ?

I'm reverse-engineering the thing for a client.

Cheers

Phil Hobbs

 

>I'm reverse-engineering the thing for a client.

Is it shorted ? Can you just take it out and see what is being applied to it ?