0
\$\begingroup\$

As I was trying to refurbish my Sony STR-434BS, I choose to install a brand new audio amplifier IC, specifically the TDA8954 as main chip for it's power deliver (around 100 [W] in stereo mode) and high-efficiency (doesn't need to be much, yet it's better than a 60% efficiency). Looking at the datasheet, there is a proposed schematic, which fulfill most of my needs. My question is: there are two input ports, each with a negative and positive terminal (IN1 and IN2). I have a RCA cable input as a proposed input, therefore I must design a differential signal input in this case? Bellow is the proposed schematics on the IC datasheet.

enter image description here

\$\endgroup\$
2
  • \$\begingroup\$ Are you attempting mono input to stereo/2 speaker output? \$\endgroup\$
    – Passerby
    Sep 29, 2021 at 19:45
  • \$\begingroup\$ So you are replacing the existing IC with a TDA8954? What is the original IC? \$\endgroup\$
    – rdtsc
    Sep 29, 2021 at 20:01

1 Answer 1

2
\$\begingroup\$

While the IC allows you to use differential input signals, it doesn't mean you have to. It's perfectly valid to just tie one side of a differential input to ground and drive the other side with a single-ended signal. Be careful with your current return paths, though, you don't want to have high power circuitry attached to the same ground as your sensitive low power signals.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.