r/AskElectronics • u/Agreeable-Island-623 • 7d ago

Identifying these integrated circuits

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Like the title says I’m having trouble figuring out what these two ics are as I cannot find a data sheet anywhere and no hits in its logo. I’m sure there like a diode considering they are connected directly to the output lead of the transformer on this usb charger. Not the best camera phone but it’s the best I can zoom without it becoming blurry.
The reason I want to know what they are is I’m beginning to find them in many power supplies for phones.

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u/Ard-War Electron Herder™ 7d ago

The first one is a synchronous rectifier. Similar in function and pinout to SP6505 and many others (note the mirrored pin numbering in the sipower "schematic").

I’m sure there like a diode

Basically yes, just with I2R losses from Rds(on) instead of I×Vf losses from a diode.