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TPA0312_16

更新时间： 2024-09-22 02:58:51
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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
32页 484K
描述
2.6-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL

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TPA0312  
www.ti.com  
SLOS335A–DECEMBER 2000–REVISED OCTOBER 2004  
2.6-W STEREO AUDIO POWER AMPLIFIER WITH FOUR  
SELECTABLE GAIN SETTINGS AND MUX CONTROL  
FEATURES  
PWP PACKAGE  
•
Compatible With PC 99 Desktop Line-Out Into  
(TOP VIEW)  
10-kΩ Load  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
GND  
GAIN0  
GAIN1  
LOUT+  
LLINEIN  
LHPIN  
GND  
•
Internal Gain Control, Which Eliminates  
External Gain-Setting Resistors  
2
RLINEIN  
SHUTDOWN  
ROUT+  
RHPIN  
3
•
•
•
•
•
•
•
•
2.6-W/Ch Output Power Into 3-Ω Load  
Input MUX Select Terminal  
PC-Beep Input  
4
5
6
V
DD  
7
PV  
PV  
DD  
DD  
Depop Circuitry  
8
RIN  
LOUT–  
LIN  
BYPASS  
GND  
HP/LINE  
ROUT–  
SE/BTL  
PC-BEEP  
GND  
Stereo Input MUX  
9
10  
11  
12  
Fully Differential Input  
Low Supply Current and Shutdown Current  
Surface-Mount Power Packaging 24-Pin  
TSSOP PowerPAD™  
DESCRIPTION  
The TPA0312 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of  
delivering 2.6 W of continuous RMS power per channel into 3-Ω loads. This device minimizes the number of  
external components needed, simplifying the design, and freeing up board space for other features. When driving  
1 W into 8-Ω speakers, the TPA0312 has less than 0.65% 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 internally configured and controlled by way of two terminals (GAIN0 and GAIN1). BTL gain  
settings of 6 dB, 10 dB, 15.6 dB, and 21.6 dB (inverting) are provided, whereas SE gain is always configured as  
4.1 dB for headphone drive. An internal input MUX allows two sets of stereo inputs to the amplifier. The HP/LINE  
terminal allows the user to select which MUX input is active, regardless of whether the amplifier is in SE or BTL  
mode. In notebook applications, where internal speakers are driven as BTL and the line outputs (often  
headphone drive) are required to be SE, the TPA0312 automatically switches into SE mode when the SE/BTL  
input is activated, and this reduces the gain to 4.1 dB.  
The TPA0312 consumes only 6 mA of supply current during normal operation. A miserly shutdown mode  
reduces the supply current to 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 readily realized in multilayer PCB  
applications. This allows the TPA0312 to operate at full power into 8-Ω loads at an ambient temperature of 85°C.  
AVAILABLE OPTIONS  
PACKAGED DEVICE  
TSSOP(1) (PWP)  
TA  
–40°C to 85°C  
TPA0312PWP  
(1) 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.,  
TPA0312PWPR).  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2000–2004, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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