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TDA7576B input voltage

box_201106
Associate

‎2015-08-28 06:47 AM

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?

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2 REPLIES 2
Nickname1623_O
Associate II

‎2015-08-30 06:11 PM

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

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box_201106
Associate

‎2015-08-31 03:36 AM

Posted on August 31, 2015 at 12:36

Thank you YT

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