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TPA0172PWP Arkusz danych(PDF) 1 Page - Texas Instruments

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Numer części TPA0172PWP
Szczegółowy opis  2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
Download  37 Pages
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

TPA0172PWP Arkusz danych(HTML) 1 Page - Texas Instruments

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TPA0172
2W STEREO AUDIO POWER AMPLIFIER
WITH I2C BUS
SLOS327C − AUGUST 2000 − REVISED MAY 2001
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D I2C Bus Controllable
D 2-W/Ch Output Power Into 4-Ω Load
D Low Supply Current and Shutdown Current
D Depop Circuitry
D Digital Volume Control From 20 dB to
−60 dB
D Internal Gain Control, Which Eliminates
External Gain-Setting Resistors
D Fully Differential Input
D Stereo Input MUX
D PC-Beep Input
D Compatible With PC 99 Desktop Line-Out
Into 10-k
Ω Load
D Compatible With PC 99 Portable Into 8-Ω
Load
D 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 I2C 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
PACKAGED DEVICE
TA
TSSOP†
(PWP)
−40
°C to 85°C
TPA0172PWP
† 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).
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.
Copyright
 2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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24
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GND
LOUT+
PC-BEEP
ADDRESS0
LIN
LLINEIN
LHPIN
PVDD
RIN
ADDRESS1
SE/BTL
ROUT+
LOUT−
SCL
SHUTDOWN
BYPASS
VDD
PVDD
RLINEIN
RHPIN
I2CVDD
SDA
ROUT−
GND
PWP PACKAGE
(TOP VIEW)
PowerPAD is a trademark of Texas Instruments.


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