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MAX98307_1109

更新时间： 2024-11-29 11:14:11
品牌 Logo 应用领域
美信 - MAXIM 音频放大器
页数 文件大小 规格书
21页 3299K
描述
3.3W Mono Class DG Multilevel Audio Amplifier

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MAX98307_1109 数据手册

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19-5848; Rev 2; 9/11  
E V A L U A T I O N K I T A V A I L A B L E  
General Description  
Benefits and Features  
The MAX98307/MAX98308 fully differential mono Class  
DG multilevel power amplifiers with integrated inverting  
charge pumps offer highly efficient, high-power audio  
solutions for portable applications.  
S High Efficiency Combined with High Output Power  
ꢀClass DG Multilevel Modulation Ensures  
Maximum Efficiency Over Wide Output Power  
Range  
Class DG multilevel modulation extends the dynamic  
range of the output signal by employing a charge-pump-  
generated negative rail as needed to extend the supply  
range. This scheme results in high efficiency over a wide  
output power range.  
S Improves Battery Life  
ꢀLow 1.85mA Quiescent Current  
S High Output Power at 1% THD+N  
ꢀ1.54W at V  
ꢀ2.85W at V  
= 3.6V, 8I + 68µH Load  
= 5V, 8I + 68µH Load  
PVDD  
PVDD  
The ICs combine Maxim’s active emissions limiting edge  
rate and overshoot control circuitry with multilevel out-  
put modulation to greatly reduce EMI. These features  
eliminate the need for output filtering as compared to  
traditional Class D devices, reducing component count  
and cost.  
S High Output Power at 10% THD+N  
ꢀ1.77W at V = 3.6V, 8I + 68µH Load  
PVDD  
ꢀ3.3W at V  
= 5V, 8I + 68µH Load  
PVDD  
S 84% Efficiency (V  
= 3.6V, at 500mW Output)  
PVDD  
S Active Emissions Limiting and Class DG Multilevel  
Output Modulation Eliminates EMI Output Filtering  
Requirement  
The MAX98307’s 16-pin TQFN package features an  
adjustable gain set by external resistors. The MAX98308’s  
space-saving 12-bump WLP package features an inter-  
nally fixed gain of 8.5dB, 11.5dB, 14.5dB, 17.5dB, and  
20.5dB set by a single gain input. Both devices operate  
over the extended -40NC to +85NC temperature range.  
S Integrated Charge Pump and High Efficiency  
Results in Small Solution Size  
S Excellent RF Immunity  
S Click-and-Pop Suppression  
S Thermal and Overcurrent Protection  
S Low-Current Shutdown Mode  
Applications  
Cellular Phones  
Smartphones  
VoIP Phones  
Portable Audio  
Tablet PCs  
Ordering Information appears at end of data sheet.  
Notebook Computers  
For related parts and recommended products to use with this part,  
refer to www.maxim-ic.com/MAX98307.related.  
Simplified Block Diagrams  
V
CC  
SHDN  
PVDD PVSS SVSS  
CHARGE PUMP  
GAIN  
SHDN  
PVDD  
PVSS  
C1P  
C1N  
FB+  
C1P  
C1N  
CHARGE PUMP  
MAX98308  
MAX98307  
OUT+  
OUT-  
IN+  
IN-  
OUT+  
OUT-  
IN+  
IN-  
CLASS DG  
AMPLIFIER  
CLASS DG  
AMPLIFIER  
FB-  
GND  
PGND  
GND  
PGND  
����������������������������������������������������������������� Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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