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TPA0252

更新时间： 2024-11-26 22:42:03
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德州仪器 - TI 放大器功率放大器
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29页 479K
描述
2.8-W STEREO AUDIO POWER AMPLIFIER WITH DIGITAL VOLUME CONTROL

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TPA0252 数据手册

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TPA0252  
www.ti.com  
SLOS288B–JUNE 2000–REVISED SEPTEMBER 2004  
2.8-W STEREO AUDIO POWER AMPLIFIER  
WITH DIGITAL VOLUME CONTROL  
•
Internal Memory Restores Volume Setting  
After Shutdown or Power Down  
PWP PACKAGE  
(TOP VIEW)  
•
•
•
•
Digital Volume Control From 20 dB to -40 dB  
2.8-W/Ch Output Power Into 3-Ω Load  
Stereo Input MUX  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
LOUT–  
SHUTDOWN  
GND  
2
LOUT+  
SE/BTL  
LIN  
LLINEIN  
LHPIN  
3
PV  
DD  
Compatible With PC 99 Desktop Line-Out Into  
10-kΩ Load  
4
UP  
DOWN  
CLK  
5
6
•
•
•
•
•
•
Compatible With PC 99 Portable Into 8-Ω Load  
PC-Beep Input  
7
BYPASS  
V
DD  
8
PV  
RHPIN  
RLINEIN  
RIN  
HP/LINE  
ROUT+  
DD  
Depop Circuitry  
9
VAUX  
PC-BEEP  
ROUT–  
GND  
10  
11  
12  
Fully Differential Input  
Low Supply Current and Shutdown Current  
Surface-Mount Power Packaging 24-Pin  
TSSOP PowerPAD™  
DESCRIPTION  
The TPA0252 is a stereo audio power amplifier in a 24-pin TSSOP thermally-enhanced package capable of  
delivering 2.8 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 TPA0252 has less than 0.3% THD+N across its specified frequency range.  
The integrated depop circuitry virtually eliminates transients that cause noise in the speakers.  
Amplifier gain is controlled by two terminals, UP and DOWN. There are 31 discrete steps covering the range of  
20 dB (maximum volume setting) to –40 dB (minimum volume setting) in 2 dB steps. By pressing either button  
momentarily, the volume steps up or down 2 dB. If a button is held down, the device starts stepping through  
volume settings at a rate determined by the capacitor on the CLK terminal.  
An internal input MUX, controlled by the HP/LINE pin, allows two sets of stereo inputs to the amplifier. In  
notebook applications, where internal speakers are driven as bridge-tied loads (BTL) and the line outputs (often  
headphone drive) are required to be single-ended (SE), the TPA0252 automatically switches into SE mode when  
the SE/BTL input is activated. This effectively reduces the gain by 6 dB.  
The TPA0252 includes a VAUX terminal that is used to power the volume-setting registers when the device is in  
SHUTDOWN, and even if the main VDD power supply is removed. As long as the VAUX terminal is held above 3  
V, the registers are maintained. If the VAUX terminal is allowed to go below 3 V, then the data in the registers is  
lost, and the default gain of –10 dB is loaded into the registers.  
The TPA0252 consumes only 9 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 truly realized in multilayer PCB  
applications. This allows the TPA0252 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.  
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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TPA0252 替代型号

型号 品牌 替代类型 描述 数据表
TPA0162 TI

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