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參數(shù)資料
| 型號： | TMPA2055DM |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2.7-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
| 中文描述： | 2.7單聲道無濾波器D類音頻功率放大器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 219K |
| 代理商： | TMPA2055DM |
May 5, 2005
Copyright
2004, Tai-1 Microelectronics Corp.
1
2.7-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
GENERAL DESCRIPTION
The TMPA2055DM is a mono class-D filter
–
free audio power
amplifier IC. It delivers up to 2.7W power into a 3 ohms load or
2.3W power into a 4 ohm load or 1.5W power into an 8 ohm load.
Two patents are pending.
With common mode input structure, TMPA2055DM requires no
input or output coupling capacitors. It also features high
Common Mode Rejection Ratio and Power Supply Rejection
Ratio.
For multiple-input applications, independent gain control and
corner frequency can be implemented by summing the input
sources through resistor ratio and input capacitor values.
Analog input signal is converted into digital output which drives
directly to the speaker. High power efficiency is achieved due to
digital output at the load. The audio information is embedded in
PWM
APPLICATIONS
（
Pulse Width Modulation
）
.
Multimedia application includes Cellular Phones, PDAs,
DVD/CD players, TFT LCD TVs/Monitors, 2.1 channel/5.1
channel audio systems, USB audio. It is also ideal for other
portable devices like Wireless Radios.
FEATURES
4.5V to 5.5V Single Supply
Up to 2.7W at 5V, 3 ohms
Up to 85% Power Efficiency
2.2mA Quiescent Current at 5V
Less Than 0.2uA Shutdown Current
Popless Power-Up, Shutdown and Recovery
Differential 230 KHz PWM Allows Bridge-Tied Load to
Doubles Output Power and Eliminates LC Output
Filter
Common
Mode
Structure
Requires
No
Input
Capacitors
BTL Output Requires No Output Capacitors
Thermal Shutoff and Automatic Recovery
Short-Circuit Protection
Differential Signal Processing Improves CMRR
Package
：
TSSOP8, SOP8, MSOP8 Available
For best performance, please refer to
http://www.taimec.com.tw/data/Tmpa2055EVM/tmpa2055
dmEVM.pdf
for PCB layout.
REFERENCE CIRCUIT
PDF created with pdfFactory trial version
www.pdffactory.com
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