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TPA0172

更新时间： 2024-11-24 22:19:19
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德州仪器 - TI 放大器功率放大器
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31页 474K
描述
2-W STEREO AUDIO POWER AMPLIFIER WITH I2C BUS

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TPA0172  
2-W STEREO AUDIO POWER AMPLIFIER  
2
WITH I C BUS  
SLOS327C – AUGUST 2000 – REVISED MAY 2001  
2
PWP PACKAGE  
(TOP VIEW)  
I C Bus Controllable  
2-W/Ch Output Power Into 4-Ω Load  
Low Supply Current and Shutdown Current  
Depop Circuitry  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
GND  
LOUT+  
PC-BEEP  
ADDRESS0  
LIN  
LOUT–  
SCL  
SHUTDOWN  
BYPASS  
2
3
Digital Volume Control From 20 dB to  
–60 dB  
4
5
V
DD  
Internal Gain Control, Which Eliminates  
External Gain-Setting Resistors  
6
LLINEIN  
LHPIN  
PV  
DD  
7
RLINEIN  
RHPIN  
8
PV  
Fully Differential Input  
Stereo Input MUX  
PC-Beep Input  
DD  
9
RIN  
ADDRESS1  
SE/BTL  
I2CV  
SDA  
DD  
10  
11  
12  
ROUT–  
GND  
ROUT+  
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  
2
delivering 2 W of continuous RMS power per channel into 4-Ω loads. This device utilizes the I C bus to control  
its functionality, which minimizes the number of external components needed, simplifies the design, and frees  
upboardspaceforotherfeatures. Whendriving1Winto8-Ω speakers, theTPA0172haslessthan0.2%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  
2
via the I 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  
PACKAGED DEVICE  
†
T
A
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.  
PowerPAD is a trademark of Texas Instruments.  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...31

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