Two channel vs one channel audio amplifier

Thread Starter

abc77

Joined May 10, 2017
59
I want to replace the AK4201 stereo amp with TPA6138A. But AK4201 has only LIN and RIN for inputs but TPA6138A has +INL, +INR, -INL and -INR as inputs. What is the difference? where should the inputs to AK4201 be replaced with TPA6138A?
 

GopherT

Joined Nov 23, 2012
8,012
I want to replace the AK4201 stereo amp with TPA6138A. But AK4201 has only LIN and RIN for inputs but TPA6138A has +INL, +INR, -INL and -INR as inputs. What is the difference? where should the inputs to AK4201 be replaced with TPA6138A?
The AK4201 use a common ground for (-).

The TPA6138A uses"bridged" outputs so there is no common ground.
 

Thread Starter

abc77

Joined May 10, 2017
59
thank you. i understand the feedback.

but TPA6138A2 has 4 inputs while AK4201 has only 2 inputs. what i am not understanding which 2 inputs of TPA6138A2 should i use and what to do with the other remaining 2 inputs.
 

Thread Starter

abc77

Joined May 10, 2017
59
regarding the TPA6138A2, i cannot confirm myself the characteristics of input and output voltage.

from datasheet the input voltage range is 0 to 3.6V(max) and the output voltage is between -1.65 to +1.65 centered at 0V. Is this correct?
 
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