The TDA7052A/AT are mono BTL output amplifiers with DC volume control, designed for use in TV and monitors but also suitable for battery fed portable recorders and radios. In conventional DC volume circuits the control or input stage is AC coupled to the output stage via external capacitors to keep the offset voltage low.
In the TDA7052A/AT the DC volume control stage is integrated into the input stage so that no coupling capacitors are required and yet a low offset voltage is maintained.
At the same time the minimum supply remains low.
The BTL principle offers the following advantages:
• Lower peak value of the supply current
•The frequency of the ripple on the supply voltage is twice the signal frequency.