Author Topic: What IC is this? USB 3W audio amp pcb  (Read 647 times)

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Offline TsardozTopic starter

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What IC is this? USB 3W audio amp pcb
« on: June 13, 2022, 06:15:15 am »
OK I bought a USB speaker I think I identified as this one

https://i-item.jd.com/10041072500661.html

as it has sort of the same model number as the PCB (see photo)
Image did not attach properly - I dont know how to do this
https://ibb.co/HrrnT0Y

The problem is, when driving it with a Raspberry Pi sometimes the sound is very distorted, slow and a bit quiet.
I think the problem is with USB DAC/CODEC.
I want to track the problem down but first I would like to identify the ICs but the numbers have been erased.

Given the pinout of the 8 pin amplifier it looks to be an 8002 or similar (pins 5 and 8 connected to the speaker).
The USB DAC is much harder to identify. It looks like pins 13 and 14 are wired to the amp via R/C.
Yet I cannot find a chip that meets these specs.
Probably some cheap Chinese knockoff.

This board might have the same IC but again no visible identifcation.
https://www.aliexpress.com/item/32680489310.html
Any ideas?

« Last Edit: June 13, 2022, 06:19:00 am by Tsardoz »
 

Offline dietert1

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« Last Edit: June 13, 2022, 09:46:08 am by dietert1 »
 

Offline TsardozTopic starter

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  • Country: au
Re: What IC is this? USB 3W audio amp pcb
« Reply #2 on: June 14, 2022, 04:56:39 am »
Thanks.
It is not that one due to pincounts but it is a great idea.
I had not considered usb mp3 players.
 


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