TPA6112A2: TPA6112A2 input VIN is 63mV at the audio band of 50HZ or 100Hz ，but the output Vo is 1V or 1.7V ,is too low ,so i need you help.

Hi Chen,

Your gain is set by Rf = 47k and Ri = 39k. What is the output you expected based on this?
You may want to reduce Ri to increase the gain.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Chen,

It has been a week since last communication. Do you have any further questions? Can we consider this as closed?

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

hi ,dear Ivan ,

Thank you for your reply ,I have  solved the problem.