SOLVED: Help identify SMPS controller ic

[montarbo]

Hello,
Have at hands a Harman Kardon SMPS usb adapter with 3 usb output at 5V, 5A. Model number 5v-5c-5u.
The power supply is totally dead. No blown fuse. Everything on as well secondary as primary sides seems fine, all caps checked with ESR spot on, every through hole (TH) component and SMD are good. Left to be checked is the controller ic which I can't find any info about.
And no, no cold joint, went over every single weld with leaded solder just to be sure.

The IC is a SOT23-6 package with two markings
73E48a
.762a

Any ideas or info about the ic would be appreciated.
BR

[frozenfrogz]

These can be bought from China (look for 74E48 SOT23-6) - no idea about make and model or datasheet though.

[montarbo]

Yeah I've seen those few sites and messaged one of the seller since yesterday if they supply datasheet with item. As a role its last resort to buy from china coz u never know what u get.

[amyk]

OB2273AMP

Confirmation: https://www.aliexpress.com/item/10pcs-lot-OB2273AMP-OB2273A-SOT23-6-package-new-original-Immediate-delivery/32902341587.html

[montarbo]

OB2273AMP

Confirmation: https://www.aliexpress.com/item/10pcs-lot-OB2273AMP-OB2273A-SOT23-6-package-new-original-Immediate-delivery/32902341587.html

Thanks a ton.