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MAX98400B PDF预览

MAX98400B

更新时间: 2024-11-18 11:14:11
品牌 Logo 应用领域
美信 - MAXIM 放大器
页数 文件大小 规格书
26页 2518K
描述
Stereo, High-Power, Class D Amplifiers

MAX98400B 数据手册

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19-5286; Rev 0; 6/10  
Stereo, High-Power, Class D Amplifiers  
General Description  
Features  
S Wide 8V to 28V Supply Voltage Range  
The MAX98400A/MAX98400B Class D amplifiers provide  
high-performance, thermally efficient amplifier solutions. The  
MAX98400A delivers 2x20W into 8Iloads or 1x40W into a  
4Iload. The MAX98400B delivers 2x12W into 8Iloads.  
S Single-Supply Operation  
S Low EMI: Active Emissions Limiting  
S Clipping Limiter  
An integrated limiting circuit prevents output clipping  
distortion, protects small speakers from transient volt-  
ages, and reduces power dissipation.  
S Low Quiescent Current  
S Thermal Foldback  
A thermal-foldback feature can be enabled to automati-  
cally reduce the output power at above a junction tem-  
perature of +120NC. Traditional thermal protection is also  
available in addition to robust overcurrent protection.  
S Thermal and Overcurrent Protection  
Applications  
LCD/PDP Televisions  
LCD Monitors  
The ICs operate from a single 8V to 28V supply and  
provide a high 67dB PSRR, eliminating the need for a  
regulated power supply. They offer up to 90% efficiency  
from a 12V supply.  
MP3 Docking Stations  
Notebook PCs  
Filterless modulation allows the ICs to pass EN55022B  
EMI limits with 1m cables using only a low-cost ferrite  
bead and small-value capacitor on each output.  
Ordering Information  
PART  
PIN-PACKAGE  
36 TQFN-EP*  
24 TQFN-EP*  
SPEC  
2x20W  
2x12W  
Both devices feature eight digitally controlled gain settings.  
MAX98400AETX+  
MAX98400BETG+  
Comprehensive click-and-pop reduction circuitry mini-  
mizes noise coming into and out of shutdown.  
Note: Devices operate over the -40°C to +85°C temperature  
range.  
*EP = Exposed pad.  
The MAX98400A/MAX98400B are available in 36-pin  
and 24-pin TQFN packages, respectively, and are speci-  
fied over the -40NC to +85NC temperature range.  
Simplified Block Diagram  
INL-  
OUTL-  
CLASS D  
MODULATOR  
AND H-BRIDGE  
CLIPPING  
PGA  
LIMITER  
INL+  
OUTL+  
MONO*  
OUTR-  
MAX98400A/B  
INR-  
INR+  
CLASS D  
MODULATOR  
AND H-BRIDGE  
CLIPPING  
LIMITER  
PGA  
OUTR+  
*MAX98400A ONLY  
_______________________________________________________________ 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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