Electronics > Repair

Help identifying this part - 1178H

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daisizhou:
Hallo everyone

I don't know what model this patch represents, I saw the mark is "1178H"。
If you know please tell me, thanks

fzabkar:
Can you provide some context? What are the surrounding components? Is the "8" likely to be a year code? Can you identify the Vcc and Ground pins?

daisizhou:

--- Quote from: fzabkar on September 06, 2024, 07:54:15 pm ---Can you provide some context? What are the surrounding components? Is the "8" likely to be a year code? Can you identify the Vcc and Ground pins?

--- End quote ---

The middle is connected to VCC and GND, and the other pins are connected to the inductor. Please see the figure below.
Looks like a DC/DC control chip.

fzabkar:
The IC appears to be driving 4 inductors, but there are no feedback pins. :-?

daisizhou:

--- Quote from: fzabkar on September 06, 2024, 09:51:31 pm ---The IC appears to be driving 4 inductors, but there are no feedback pins. :-?

--- End quote ---

It looks like the 4 inductors connected to it are connected to the output jack

Each of these chips is always connected to 6 inductors, see the figure below.

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