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NCP2821D

更新时间： 2024-09-19 04:13:39
品牌 Logo 应用领域
安森美 - ONSEMI 音频放大器
页数 文件大小 规格书
19页 247K
描述
2.65 W Filterless with Selectable Gain Class−D Audio Amplifier

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中文翻译

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NCP2821D 数据手册

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NCP2821  
2.65 W Filterless with  
Selectable Gain Class−D  
Audio Amplifier  
NCP2821 is a cost effective mono audio power amplifier designed  
for portable communication device applications such as mobile  
phones. The internal gain setting between 6 dB and 12 dB will also  
save external gain setting resistors. To achieve a typical audio mono  
application, you only need an external capacitor for filtering the power  
supply. The NCP2821 processes analog inputs with a PWM technique  
that lowers significantly output noise and THD.  
This part is capable of delivering 2.65 W of continuous average  
power to a 4.0 ꢀ BTL load from a 5.0 V power supply. Operating on a  
single 3 V supply, the output power stage can provide 500 mW to an  
8.0 ꢀ BTL load with less than 1% THD+N. For cellular handsets or  
PDAs it offers space and cost savings because no output filter is  
required when using inductive transducers. Its improved Class−D  
technology makes it suitable for portable devices. With 90%  
efficiency and very low shutdown current, it increases widely the  
lifetime of your battery compared to a ClassAB solution. It also  
minimizes the junction temperature.  
http://onsemi.com  
MARKING  
DIAGRAM  
9−PIN FLIP−CHIP CSP  
FC SUFFIX  
MAUG  
AYWW  
CASE 499AL  
1
A1  
MAU = Device Code  
A
Y
= Assembly Location  
= Year  
WW = Work Week  
G
= Pb−Free Package  
PIN CONNECTIONS  
9−Pin Flip−Chip CSP  
It fully rejects “pop & click” noises with a fast start−up time of 9 ms.  
Added to a −65 dB PSRR, the NCP2821 audio power amplifier is  
specifically designed to provide high quality output power from low  
supply voltage, requiring only 1 external capacitor.  
A1  
A2  
A3  
INP  
GS  
OUTM  
B1  
VP  
B2  
VP  
B3  
GND  
C3  
Features  
• Optimized PWM Output Stage: Filterless Capability  
C1  
C2  
• Selectable Gain of 6 dB or 12 dB: No Need for External Gain Setting  
Resistors  
INM  
SD  
OUTP  
• Efficiency up to 90% and Low Quiescent Current  
Maximum Battery Life and Minimum Heat  
• High Output Power Capability: 1.4 W with 8.0 ꢀ Load  
• Wide Supply Voltage Range: 2.5−5.5 V Operating Voltage  
(Top View)  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 18 of  
this data sheet.  
• High Performance, THD+N of 0.05%  
1
ꢁ
F
• Excellent PSRR (−65 dB): No Need for Voltage Regulation  
• Surface Mounted Package 9−Pin Flip−Chip CSP  
• Fully Differential Capability: No Need for Input Coupling Capacitor  
• Very Fast Turn On Time: 9.0 ms (typ)  
VP  
Audio  
Input  
from  
INP  
INM  
OUTM  
OUTP  
DAC  
GS  
SD  
Input from  
Micro  
controller  
• “Pop and Click” Noise Protection Circuitry  
Applications  
GND  
Cs  
• Cellular Phone  
• Personal Computer  
• PDAs  
1.6 mm  
• Portable Electronic Devices  
2.7 mm  
Solution Size  
©
Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
February, 2006 − Rev. 0  
NCP2821/D  
1234567...19

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