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TPA0142

更新时间： 2024-11-07 22:19:19
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德州仪器 - TI 放大器功率放大器
页数 文件大小 规格书
30页 455K
描述
2-W STEREO AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL

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TPA0142 数据手册

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TPA0142  
2-W STEREO AUDIO POWER AMPLIFIER  
WITH DC VOLUME CONTROL  
SLOS248B – JUNE 1999 – REVISED MARCH 2000  
PWP PACKAGE  
(TOP VIEW)  
Compatible With PC 99 Desktop Line-Out  
Into 10-kΩ Load  
Compatible With PC 99 Portable Into 8-Ω  
Load  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
GND  
PCB ENABLE  
VOLUME  
LOUT+  
GND  
2
RLINEIN  
SHUTDOWN  
ROUT+  
RHPIN  
3
Internal Gain Control, Which Eliminates  
External Gain-Setting Resistors  
4
5
LLINEIN  
LHPIN  
DC Volume Control From 20 dB to –40 dB  
2-W/Ch Output Power Into 3-Ω Load  
PC-Beep Input  
6
V
DD  
7
PV  
PV  
DD  
CLK  
ROUT–  
SE/BTL  
PC-BEEP  
GND  
DD  
8
RIN  
LOUT–  
LIN  
BYPASS  
GND  
9
Depop Circuitry  
10  
11  
12  
Stereo Input MUX  
Fully Differential Input  
Low Supply Current and Shutdown Current  
Surface-Mount Power Packaging  
24-Pin TSSOP PowerPAD  
description  
The TPA0142 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 3-Ω loads. This device minimizes the number of  
external components needed, which simplifies the design and frees up board space for other features. When  
driving 1 W into 8-Ω speakers, the TPA0142 has less than 0.22% THD+N across its specified frequency range.  
Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in  
the speakers.  
Amplifier gain is controlled by a dc voltage input on the VOLUME terminal. There are 31 discrete steps covering  
the range of 20 dB (maximum volume setting) to –40 dB (minimum volume setting) in 2 dB steps. When the  
VOLUME terminal exceeds 3.54 V, the device is muted. An internal input MUX allows two sets of stereo inputs  
to the amplifier. In notebook applications, where internal speakers are driven as BTL and the line outputs (often  
headphone drive) are required to be SE, the TPA0142 automatically switches into SE mode when the SE/BTL  
input is activated, and this effectively reduces the gain by 6 dB.  
The TPA0142 consumes only 20 mA of supply current during normal operation. A miserly shutdown mode  
reduces the supply current to less than 150 µA.  
The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable only  
in TO-220-type packages. Thermal impedances of approximately 35°C/W are truly realized in multilayer PCB  
applications. This allows the TPA0142 to operate at full power into 8-Ω loads at ambient temperatures of 85°C.  
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 Incorporated.  
Copyright 2000, 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...30

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TPA0142 替代型号

型号 品牌 替代类型 描述 数据表
TPA6011A4 TI

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