Texas Instruments TPA3003D2, User Manual

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SLOS406A − FEBRUARY 2003 − REVISED MARCH 2003
1
www.ti.com
FEATURES
D
3-W/Ch Into an 8-
Ω
Load From 12-V Supply
D
Efficient, Class-D Operation Eliminates
Heatsinks and Reduces Power Supply
Requirements
D
32-Step DC Volume Control From −40 dB
to 36 dB
D
Third Generation Modulation Techniques
− Replaces Large LC Filter With Small
Low-Cost Ferrite Bead Filter
D
Thermal and Short-Circuit Protection
APPLICATIONS
D
LCD Monitors and TVs
D
Powered Speakers
DESCRIPTION
The TPA3003D2 is a 3-W (per channel) efficient,
Class-D audio amplifier for driving bridged-tied stereo
speakers. The TPA3003D2 can drive stereo speakers
as low as 8
Ω
. The high efficiency of the TPA3003D2
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.
Cs
Cs
10 nF
Cbs
Cs
Cs
10 nF
Cbs
PVCC PVCC
Cs
Cs
10 nF
Cbs
Cs
Cs
10 nF
Cbs
PVCC PVCC
220 pF
Cosc
Rosc
Ccpl
100 nF
Cvdd
Ccpr
Crinp
Crinn
Clinn
Clinp
LINP
LINN
RINN
RINP
SYSTEM CONTROL
VOLUME
BSLP PVCCL PVCCL LOUTP LOUTP PGNDL PGNDL LOUTN LOUTN PVCCL PVCCL BSLN
TPA3003D2
VCLAMPR SD
V2P5
RINP
LINN
LINP
AVDDREF
VREF
AGND
AGND
VOLUME
REFGND
MUTE
NC
NC
NC
AVDD
AGND
COSC
ROSC
AVCC
VCLAMPL
BSRP
PVCCR PVCCR
ROUTP ROUTP PGNDR PGNDR ROUTN ROUTN
PVCCR PVCCR
BSRN
RINN
AVDD
AVCC
C2p5
FADE
10
µ
F 10
µ
F
0.1
µ
F 0.1
µ
F
1
µ
F
1
µ
F
1
µ
F
1
µ
F
1
µ
F
0.1
µ
F 0.1
µ
F
10
µ
F 10
µ
F
1
µ
F
120 k
Ω
1
µ
F
Cs
0.1
µ
F
Cvcc
10
µ
F
MUTE CONTROL
SYSTEM CONTROL
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Copyright

2003, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.