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CONFIDENTIAL – DO NOT COPY
Page 8-58
File No. SG-0184
TDA8946 Application
In L32 TV the TDA8946AJ is a dual-channel audio power amplifier with DC gain control. It has an
output power of 2 10 W at an 8 load and a 12 V supply.
Block diagram
1. Input configuration
The TDA8946AJ inputs can be driven symmetrical (floating) as well as asymmetrical. In the
asymmetrical mode one input pin is connected via a capacitor to the signal source and the
other input is connected to the signal ground. The signal ground should be as close as possible
to the SVR (electrolytic) capacitor ground. Note that the DC level of the input pins is half of the
supply voltage VCC, so coupling capacitors for both pins are necessary.