TUSB544: How to adjust the EQ of TUSB544

Lumina Gui

Part Number: TUSB544

Hi Sir,

When I was debugging the TUSB544, I found that the signal cannot be output after passing through the TUSB544. Then I compared the same products and noticed that there is signal output without adding TUSB544. By checking the Log I learned that the product can be set to adjusting the bandwidth state.

Therefore, I think if TUSB544 does not increase the gain and let the signal pass directly, this problem may be solved. So I don’t want to do EQ enhancement and pull down both DEQ and UEA ground with 1KΩ resistor. The schematic is as follows,

I was wondering if my approach is feasible? Or you can give a better suggestions to solve the problem of no signal output.

Thanks,

Best Regards

over 3 years ago

0 David (ASIC) Liu over 3 years ago

TI__Guru**** 154861 points

Hi,

The TUSB544 does not provide a EQ bypass function. So if you set UEQ and DEQ with 1k resistor, there is still EQ applied to both upstream and downstream signal/

Can you please share the schematic in .pdf format for review? Look at the screen shot, it looks like the connection between the TUSB544 and the Type-C connector is not correct.

Thanks

David

0 Lumina Gui over 3 years ago in reply to David (ASIC) Liu

Expert 2955 points

Hi David,

The schematic in .pdf format is as below, pls check it.

SCHEMATIC1 _ 02.pdf

Thanks,

Best Regards

0 David (ASIC) Liu over 3 years ago in reply to Lumina Gui

TI__Guru**** 154861 points

Hi,

Please see my review. There are number of issues associated with this design that need to be fixed and we need to review the design again.

SCHEMATIC1 _ 02_TI_Reviewed_07202021.pdf

Thanks

David

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TUSB544: How to adjust the EQ of TUSB544