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MAX9708

更新时间： 2024-11-30 14:58:27
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
22页 556K
描述
20W/40W、无需滤波的扩频单声道/立体声D类放大器

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中文翻译

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MAX9708 数据手册

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EVALUATION KIT AVAILABLE  
MAX9708  
20W/40W, Filterless, Spread-Spectrum,  
Mono/Stereo, Class D Amplifier  
General Description  
Features  
The MAX9708 mono/stereo, Class D audio power amplifi-  
er delivers up to 2 x 21W into an 8Ω stereo mode and  
1 x 42W into a 4Ω load in mono mode while offering up to  
87% efficiency. The MAX9708 provides Class AB amplifi-  
er performance with the benefits of Class D efficiency,  
eliminating the need for a bulky heatsink and conserving  
power. The MAX9708 operates from a single +10V to  
+18V supply, driving the load in a BTL configuration.  
o 2 x 21W Output Power in Stereo Mode  
(8Ω, THD = 10%)  
o 1 x 42W Output Power in Mono Mode  
(4Ω, THD = 10%)  
o High Efficiency: Up to 87%  
o Filterless Class D Amplifier  
o Unique Spread-Spectrum Mode  
o Programmable Gain (+22dB, +25dB, +29.5dB,  
The MAX9708 offers two modulation schemes: a fixed-  
frequency modulation (FFM) mode, and a spread-spec-  
trum modulation (SSM) mode that reduces  
EMI-radiated emissions. The MAX9708 can be synchro-  
nized to an external clock from 600kHz to 1.2MHz. A  
synchronized output allows multiple units to be cascad-  
ed in the system.  
+36dB)  
o High PSRR (90dB at 1kHz)  
o Differential Inputs Suppress Common-Mode  
Noise  
o Shutdown and Mute Control  
o Integrated Click-and-Pop Suppression  
o Low 0.1% THD+N  
o Current Limit and Thermal Protection  
o Programmable Thermal Flag  
o SYNC Input/Output  
Features include fully differential inputs, comprehensive  
click-and-pop suppression, and four selectable-gain set-  
tings (22dB, 25dB, 29.5dB, and 36dB). A pin-program-  
mable thermal flag provides seven different thermal  
warning thresholds. Short-circuit and thermal-overload  
protection prevent the device from being damaged  
during a fault condition.  
o Available in Thermally Efficient, Space-Saving  
56-Pin TQFN Package  
The MAX9708 is available in a 56-pin TQFN (8mm x  
8mm x 0.8mm) package and is specified over the  
extended -40°C to +85°C temperature range.  
Ordering Information  
PIN-  
PACKAGE  
PKG  
CODE  
Applications  
PART  
TEMP RANGE  
LCD TVs  
PDP TVs  
MAX9708ETN+  
-40°C to +85°C 56 TQFN-EP*  
T5688-3  
T5688-3  
Automotive  
PC/HiFi Audio Solutions  
MAX9708ETN/V+ -40°C to +85°C 56 TQFN-EP*  
+Denotes lead-free package.  
/V denotes an automotive qualified part.  
*EP = Exposed pad.  
Pin Configurations appear at end of data sheet.  
Simplified Block Diagram  
MAX9708  
MAX9708  
2
2
SYNCOUT  
SYNCOUT  
FS1, FS2  
SYNC  
FS1, FS2  
SYNC  
RIGHT  
CHANNEL  
AUDIO  
INPUT  
CLASS D  
MODULATOR  
CLASS D  
MODULATOR  
LEFT  
CHANNEL  
GAIN  
CONTROL  
V
DIGITAL  
GAIN  
CONTROL  
OUTPUT  
PROTECTION  
OUTPUT  
PROTECTION  
MONO  
MONO  
G1, G2  
2
2
G1, G2  
3
3
TH0, TH1,  
TH2  
TH0, TH1,  
TH2  
TEMP  
TEMP  
STEREO MODE  
MONO MODE  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-3678; Rev 3; 4/13  
1234567...22

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