TMPA2055DM Datasheet, PDF (1/11 Pages) List of Unclassifed Manufacturers – 2.7-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
2.7-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
GENERAL DESCRIPTION
FEATURES
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（Pulse Width Modulation）.
APPLICATIONS
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.
REFERENCE CIRCUIT
♦ 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.
Copyright ©2004, Tai-1 Microelectronics Corp.
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