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AS2002

更新时间： 2024-09-20 11:46:35
品牌 Logo 应用领域
其他 - ETC /
页数 文件大小 规格书
56页 546K
描述
High Efficiency Stereo Audio Power Amplifier2.0全数字2*25W功放

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中文翻译

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AS2002 数据手册

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AS2002  
Preliminary Datasheet  
High Efficiency Stereo Audio Power Amplifier  
Feature Set  
General Description  
The AS2002 is a stereo (2x 25W peak) highly power efficient switching audio  
power amplifier devices using Audium’s proprietary technology; optimised  
to operate directly from a low voltage battery supply.  
•
•
•
Stereo audio power amplifier  
2x25W peak power output (in to 8Ω loads)  
Low power consumption  
at normal listening levels: 60mW  
(delivering 2x 13mW in to 8Ω loads;  
corresponding to a total SPL of 73dB(C)  
from 89dB(C)/W at 1m speakers)  
Power efficient operation eliminates heat  
sinks  
The Audium Advantage  
The high peak-to-average-power-ratio characteristics of an audio signal,  
together with the dynamic range of a volume control, mean that an audio  
amplifier is very rarely operating at full output power. Existing switching  
audio power amplifiers only achieve optimum claimed efficiency at or near  
full output power. In comparison, Audium’s power amplifier technology  
efficiently amplifies an audio signal over its entire operating output power  
range.  
•
•
Optimised for 1.5V battery supply  
o
o
0.8 – 1.8V supply range  
3.7V & 5V supply options, with external  
components  
•
•
•
8Ω - 16Ω load impedance (8Ω optimal)  
20Hz - 20kHz frequency response  
Digital audio input:  
At normal listening levels, Audium’s audio power amplifier technology can  
therefore offer a significant power saving advantage. Furthermore, as the  
maximum power output rating of a comparative audio amplifier increases,  
so does the Audium advantage.  
o
o
o
o
o
I²S, left or right formatted  
32 - 48kHz support  
16bits per channel  
Master and slave modes  
Automatic sample rate adaptation  
Target Applications  
•
Audio processing:  
Whilst such characteristics are useful in virtually all audio power amplifier  
applications, they are most valuable in applications which require a  
relatively high output power but where the energy source is limited. For  
example:  
o
44step volume control  
1.5dB per step  
o
o
o
o
Mute, with adjustable ramping  
Stereo-wide  
Tuneable bass-boost  
16 user configurable biquad filters  
•
•
•
•
Battery powered MP3 docking station speaker systems  
USB powered speakers  
Battery powered travel speakers  
FM and DAB radios  
•
Automatic power save mode when the  
input signal is removed  
•
•
•
Click and pop suppression  
Operation from external clock source  
User interface:  
In a battery powered product, Audium’s power saving advantage directly  
translates into an increased operating lifetime of the product. In the case of  
a USB powered speaker, power output is greatly increased.  
o
o
o
o
Push button inputs  
Rotary encoder volume control  
Control pin inputs  
Example: USB Powered Speaker System  
LED indicator drivers  
•
2-wire serial control interface:  
Push buttons  
AS2002  
o
o
Slave mode for control by external host  
Master mode to control external device  
(for example: external ADC)  
System Control  
Left PA  
•
•
•
Self configuring on power-up; autonomous  
operation  
USB  
Audio  
Proc.  
USB  
Right PA  
One-Time-Programmable user register  
defaults  
3V3  
1V8  
Power Supply  
Single package: 64QFN  
1234567...56

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