TDA7576B input voltage

box_201106 · ‎2015-08-28

Posted on August 28, 2015 at 15:47

Hello,

I am developing new device with TDA7576B amplifier. TDA7576 input voltage -0.3 to 5V (from absolute maximum ratings). Is it rms value or input signal voltage must be positive only? I need computer line out signal to drive TDA7576B. Line out signal output voltage is 0.316 rms. Can I put line out signal to TDA7576B input directly?

Nickname1623_O · ‎2015-08-30

Posted on August 31, 2015 at 03:11

hi Alex ,

the gain of TDA7576B is 26dB fix gain , to reach 20W 1% THD output power with 4 ohm load , the minimum input level should be 0.45V rms , then you'd better to adjust the line output level attenuation/volume control ( normally the line input is around 1V or 2V rms ) or add a buffer amplifier to provide 6dB more gain .

the polarity is relevant with phase , if there are no requirement with output polarity , it's OK to use minous signal input .

Thanks ,

YT

box_201106 · ‎2015-08-31

Posted on August 31, 2015 at 12:36

Thank you YT