The TPA6011A4 is a stereo audio power amplifier that drives 2 W/channel of continuous RMS
power into a 3-
Ω
load. Advanced dc volume control minimizes external components and allows
BTL (speaker) volume control and SE (headphone) volume control. Notebook and pocket PCs
benefit from the integrated feature set that
minimizes external components without sacrificing functionality.
To simplify design, the speaker volume level is adjusted by applying a dc voltage to the VOLUME
terminal. Likewise, the delta between speaker volume and headphone volume can be adjusted by
applying a dc voltage to the SEDIFF terminal. To avoid an unexpected high volume level through
the headphones, a third terminal, SEMAX, limits the headphone volume level when a dc voltage is
applied. Finally, to ensure a smooth transition between active and shutdown modes, a fade mode
ramps the volume up and down.
Feature
Ø
Advanced DC Volume Control With 2-dB Steps From
–
40 dB to 20 dB
Ø
Fade Mode
Ø
Maximum Volume Setting for SE Mode
Ø
Adjustable SE Volume Control Referenced to BTL Volume Control
Ø
2 W Into 3-
Ω
Speakers
Ø
Stereo Input MUX
Ø
Differential Inputs APPLICATIONS
Ø
Notebook PC
Ø
LCD Monitors
Ø
Pocket PC
Woofer LM4871
The LM4871 is a mono bridged audio power amplifier capable of delivering 3W of continuous
average power into a 3W load with less than 10% THD when powered by a 5V power supply (Note
1). To conserve power in portable applications, the LM4871
’
s micropower shutdown mode (IQ =
0.6
µ
A, typ) is activated when VDD is applied to the SHUTDOWN pin.
Boomer audio power amplifiers are designed specifically to provide high power, high fidelity audio
output. They require few external components and operate on low supply voltages from 2.0V to
5.5V. Since the LM4871 does not require output coupling capacitors, bootstrap capacitors, or
snubber networks, it is ideally suited for low-power portable systems that require minimum volume
and weight.
Additional LM4871 features include thermal shutdown protection, unity-gain stability, and external
TECHNICAL SERVICE MANUAL
Prestigio Nobile 159W
1-30
Summary of Contents for NOBILE 159W
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Page 92: ...25 System Disassembly TECHNICALSERVICEMANUAL PrestigioNobile159W 4 10 ...
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Page 102: ...4 Fasten 1 screw of the HDD cover TECHNICALSERVICEMANUAL PrestigioNobile159W 5 7 ...
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