Acer DV650C Service Manual page 62

7 、 Audio Power Amplifier : TPA3009D
The TPA3009D2 is a 6-W (per channel) efficient, Class-D audio amplifier for driving bridged-tied
stereo speakers. The TPA3009D2 can drive stereo speakers as low as 8 . The high efficiency of the
TPA3009D2 eliminates the need for external heatsinks when playing music. Stereo speaker volume
is controlled with a dc voltage applied to the volume control terminal offering a range of gain from –40
dB to 36 dB. Line outputs, for driving external headphone amplifier inputs, are also dc voltage
controlled with a range of gain from –56 dB to 20 dB.
TPA3009D Functional Block Diagram
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