modified 10 years ago

I have a question. look in the description

00:48:44

I tear a lot of power supplies down and i keep seeing a certain type of ship with 4pins it looks like a bridge-rectifier but isn't, i tried to find a data-sheet of them but i couldn't find any. so what is that chip?
Part number:

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|    NEC   |
|    2561  |
|  DF903 |
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published 10 years ago

kaivanveldhoven

10 years ago

It's an optocoupler: http://www.alldatasheet.com/datasheet-pdf/pdf/6457/NEC/PS2561-1.html

dylanmissuwe

10 years ago

Yes! Thanks

dylanmissuwe

10 years ago

Is the led inside visible or infrared?

hurz

10 years ago

To find out you have to open/destroy it.

hurz

10 years ago

If you already have open it, then use your mobile phone cam in viewfinder mode to check if its IR.

dylanmissuwe

10 years ago

Thanks

dylanmissuwe

10 years ago

But i checked the data-sheet and it says its an GaAs led and thats infrared. Infrared is also the most power efficient cause it runs on 1.2V

hurz

10 years ago

1.2V is not power, its a voltage. I think the reason is, the receiver sillicon transistor are most sensitive at IR wavelength.

rflberg

10 years ago

Its a optocoupler . its used to isolate hot side of the power supply to the cold side for voltage regulation.

dylanmissuwe

10 years ago

By hot you mean primary and cold secondary?

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