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TPA0172PWP TIN/a150avaiStereo Class-AB Audio Amplifier with Stereo Headphone Drive and I2C Control
TPA0172PWPG4TIN/a7avaiStereo Class-AB Audio Amplifier with Stereo Headphone Drive and I2C Control 24-HTSSOP -40 to 85
TPA0172PWPRTIN/a437avaiStereo Class-AB Audio Amplifier with Stereo Headphone Drive and I2C Control
TPA0172PWPRG4TIN/a1338avaiStereo Class-AB Audio Amplifier with Stereo Headphone Drive and I2C Control


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TPA0172PWP -TPA0172PWPG4-TPA0172PWPR-TPA0172PWPRG4
Stereo 2-W Audio Power Amplifier with I2C Control
Digital Volume Control From 20 dB to −60 dB Internal Gain Control, Which Eliminates
External Gain-Setting Resistors
Fully Differential Input Stereo Input MUX PC-Beep Input Compatible With PC 99 Desktop Line-Out
Into 10-kΩ Load
Compatible With PC 99 Portable Into 8-Ω
Load
Surface-Mount Power Packaging
24-Pin TSSOP PowerPAD


description

The TPA0172 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of
delivering 2 W of continuous RMS power per channel into 4-Ω loads. This device utilizes the I2C bus to control
its functionality, which minimizes the number of external components needed, simplifies the design, and frees
up board space for other features. When driving 1 W into 8-Ω speakers, the TPA0172 has less than 0.2% THD+N
from 20 Hz to 20 kHz.
Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in
the speakers at power up, power down, and while transitioning in and out of shutdown mode.
The overall gain of the amplifier is controlled digitally by the volume control registers which are programmed
via the I2 C interface. At power up, the amplifier defaults to –60 dB in BTL mode, or –66 dB in SE mode. There
are four registers that contain the gains: left BTL, right BTL, left SE, and right SE. Each register contains six bits,
which allows 64 gain steps from –60 dB to 20 dB in 1.25-dB steps, and two bits that mute the amplifier.
The TPA0172 only consumes 6.5 mA of supply current during normal operation. A shutdown mode is included
that reduces supply current to less than 15 µA.
The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable on
TO-200-type packages. Thermal impedances of approximately 35°C/W are truly realized in multilayer PCB
applications. This allows the TPA0172 to operate at full power into 8-Ω loads at ambient temperatures of 85°C.
AVAILABLE OPTIONS
The PWP package is available taped and reeled. To order a taped and reeled part,
add the suffix R to the part number (e.g., TPA0172PWPR).
ADDRESS0
LIN
LLINEIN
LHPIN
PVDD
RIN
ADDRESS1
SE/BTL
ROUT+
BYPASSDD
PVDD
RLINEIN
RHPIN
I2CVDD
SDA
ROUT−
GND
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