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TAS5142

更新时间: 2024-11-08 22:42:27
品牌 Logo 应用领域
德州仪器 - TI 放大器
页数 文件大小 规格书
26页 573K
描述
STEREO DIGITAL AMPLIFIER POWER STAGE

TAS5142 数据手册

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TM  
TAS5142  
www.ti.com  
SLES126BDECEMBER 2004REVISED MAY 2005  
STEREO DIGITAL AMPLIFIER POWER STAGE  
deliver high-quality, high-efficiency audio amplification  
FEATURES  
2×100 W at 10% THD+N Into 4-BTL (1)  
2×80 W at 10% THD+N Into 6-BTL  
2×65 W at 10% THD+N Into 8-BTL  
4×40 W at 10% THD+N Into 3-SE  
4×30 W at 10% THD+N Into 4-SE  
1×160 W at 10% THD+N Into 3-PBTL  
1×200 W at 10% THD+N Into 2-PBTL (1)  
>100 dB SNR (A-Weighted)  
with proven EMI compliance. This device requires two  
power supplies, at 12 V for GVDD and VDD, and at  
32 V for PVDD. The TAS5142 does not require  
power-up sequencing due to internal power-on reset.  
The efficiency of this digital amplifier is greater than  
90% into 6 , which enables the use of smaller  
power supplies and heatsinks.  
The TAS5142 has an innovative protection system  
integrated on-chip, safeguarding the device against a  
wide range of fault conditions that could damage the  
system. These safeguards are short-circuit protection,  
overcurrent protection, undervoltage protection, and  
overtemperature protection. The TAS5142 has a new  
proprietary current-limiting circuit that reduces the  
possibility of device shutdown during high-level music  
transients. A new programmable overcurrent detector  
allows the use of lower-cost inductors in the demodu-  
lation output filter.  
<0.1% THD+N at 1 W  
Two Thermally Enhanced Package Options:  
– DKD (36-pin PSOP3)  
– DDV (44-pin HTSSOP)  
High-Efficiency Power Stage (>90%) With  
140-mOutput MOSFETs  
Power-On Reset for Protection on Power Up  
Without Any Power-Supply Sequencing  
BTL OUTPUT POWER vs SUPPLY VOLTAGE  
120  
T
= 75°C  
C
Integrated Self-Protection Circuits Including  
Undervoltage, Overtemperature, Overload,  
Short Circuit  
110  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
THD+N @ 10%  
Error Reporting  
4  
EMI Compliant When Used With  
Recommended System Design  
Intelligent Gate Drive  
6 Ω  
APPLICATIONS  
Mini/Micro Audio System  
DVD Receiver  
Home Theater  
8 Ω  
DESCRIPTION  
0
4
8
12  
16  
20  
24  
28  
32  
The TAS5142 is a third-generation, high-perform-  
ance, integrated stereo digital amplifier power stage  
with an improved protection system. The TAS5142 is  
capable of driving a 4-bridge-tied load (BTL) at up  
to 100 W per channel with low integrated noise at the  
output, low THD+N performance, and low idle power  
dissipation.  
PVDD − Supply Voltage − V  
G002  
(1)It is not recommended to drive 200 W (total  
power) into the DDV package continuously.  
For multichannel systems that require two  
channels to be driven at full power with the  
DDV package option, it is recommended to  
design the system so that the two channels  
are in two separate devices.  
A low-cost, high-fidelity audio system can be built  
using a TI chipset, comprising a modulator (e.g.,  
TAS5508) and the TAS5142. This system only re-  
quires a simple passive LC demodulation filter to  
PurePath Digital™  
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.  
PurePath Digital, PowerPad are trademarks of Texas Instruments.  
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2004–2005, 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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