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MAX98372EWV+T PDF预览

MAX98372EWV+T

更新时间： 2024-11-30 02:50:15
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
100页 3293K
描述
Digital Input Class D Amplifier with DHT and Brownout Protection

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中文翻译

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MAX98372EWV+T 数据手册

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EVALUATION KIT AVAILABLE  
MAX98372  
Digital Input Class D Amplifier  
with DHT and Brownout Protection  
General Description  
Benefits and Features  
● Wide Supply Range (5.5V to 18V)  
The MAX98372 is a high-efficiency, mono Class D audio  
amplifier featuring dynamic headroom tracking (DHT)  
and brownout protection. DHT automatically optimizes  
the headroom available to the Class D amplifier as the  
power supply voltage varies, due to sudden transients  
and declining battery life to maintain a consistent listening  
experience. A wide 5.5V to 18V supply range allows the  
device to reach 19W into an 8Ω load.  
● Dynamic Headroom Tracking Maintains a Consistent  
Listening Experience  
● Integrated Thermal Foldback Allows Robust  
Operation in a WLP Package  
● Remote Output Sensing Allows Up to 20dB THD+N  
Improvement When Ferrites Are Used  
● Class D Edge Rate Control Enables Filterless  
Operation  
● 110dB A-Weighted Dynamic Range  
● Output Power at 1% THD+N:  
• 15.7W into 8Ω, V  
• 13.2W into 4Ω, V  
● Output Power at 10% THD+N  
• 19W into 8Ω, V = 17V  
• 15.8W into 4Ω, V  
● Speaker Amplifier Efficiency  
• 91% at 10W into 8Ω, V  
• 81% at 15W into 4Ω, V  
● ALC Provides Battery Brownout Protection  
● Extensive Click-and-Pop Suppression  
The MAX98372’s flexible digital audio interface (DAI)  
supports I S, left-justified, and TDM formats. The digital  
2
audio interface accepts 32kHz, 44.1kHz, 48kHz, 88.2kHz,  
and 96kHz sample rates with 16-/24-/32-bit data sup-  
ported for all data formats. In TDM mode, the device can  
support up to 16 channels of audio data. A unique clocking  
structure eliminates the need for an external MCLK signal  
that is typically needed for PCM communication. This  
reduces pin count and simplifies board layout.  
= 17V  
= 12V  
PVDD  
PVDD  
PVDD  
PVDD  
= 12V  
= 12V  
= 12V  
PVDD  
PVDD  
Active emissions limiting with edge rate control minimizes  
EMI and eliminates the need for output filtering found in  
traditional Class D devices.  
An 8-bit PVDD supply voltage ADC enables the dynamic  
headroom tracking circuit. DHT optimizes audio program  
peak behavior as the supply voltage varies and provides  
flexible user-defined parameters.  
● 30-Bump, 0.4mm WLP and 32-Pin TQFN Packages  
Simplified Block Diagram  
Thermal foldback protection ensures robust behavior  
when the thermal limits of the device are exercised. The  
circuit can be enabled to automatically reduce the output  
power above a user specified temperature. This allows for  
uninterrupted music playback even at high ambient tem-  
peratures. Traditional thermal protection is also available  
in addition to robust overcurrent protection.  
DVDD  
PVDD  
MAX98372  
THERMAL  
FOLDBACK  
I2C  
All MAX98372 control is performed using a standard  
2-wire, I C interface. One of sixteen slave addresses can  
DHT  
2
ALC  
be selected through two, four-level address pins. The IC is  
available in a 0.4mm pitch, 30-bump WLP and 32-pin TQFN  
packages. It is specified over the extended, -40°C to +85°C  
temperature range.  
D
V
O
L
P
G
A
DAC  
CLASS D  
Applications  
● Tablets  
● Notebook Computers  
● Soundbars  
Ordering Information appears at end of data sheet.  
19-7734; Rev 4; 3/20  
1234567...100

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