Tai-1 Microelectronics
Preliminary
TMPA208DS
www.taimec.com.tw
/
www.class-d.com.tw
Rev.1.0
June 27, 2006
Copyright
©2005,Tai-1 Microelectronics Corp.
1
2.5W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH VOLUME CONTROL
GENERAL DESCRIPTION
The TMPA208DS is a stereo class-D audio power
amplifier with volume control. It delivers up to
2.5W/ch(5W in all) into a 3 ohm load or 2W/ch(4W
in all) into a 4 ohm load or 1.25W/ch(2.5W in all)
into an 8 ohm load.
With
differential
input
structure,
TMPA208DS
features high Common Mode Rejection Ratio and
Power Supply Rejection Ratio.
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）.
DC
volume
control
is
convenient
for
LCD
projectors, LCD monitors, powered speakers, and
other consumer products especially when using
remote control.
APPLICATIONS
Multimedia application includes Cellular Phones,
PDAs, DVD/CD players, TFT LCD TVs/Monitors,
LCD Projectors, 2.1 channel audio systems,
Powered Speakers, USB audio. It is also ideal for
other portable devices like Wireless Radios.
FEATURES
♦2.5V to 6V Single Supply
♦Up to 5Wrms Max. Power or 2.5Wrms/ch.
♦Up to 86% Power Efficiency
♦3mA /Ch Quiescent Current
♦Less Than 0.2uA /Ch Shutdown Current
♦Pop-less Power-Up, Shutdown and Recovery
♦Differential 230 KHz PWM Allows Bridge-Tied Load to
Increase Output Power
♦DC Volume Control
♦BTL Output Requires No Output Capacitors
♦Thermal Shutoff and Automatic Recovery
♦Output Pin Short-Circuit Protection (Short to Other
Outputs, Short to VCC, Short to Ground)
♦Compatible with earphone application
♦Differential Signal Processing Improves CMRR &
Eliminates Power Regulation
♦Package：TSSOP20 Available
For best performance, please refer to
http://www.taimec.com.tw/English/EVM.htm
http://www.class-d.com.tw/English/EVM.htm
for PCB layout.
Tai-1 Microelectronics Corp. reserves the right to make changes to its products and services and to
discontinue any product or service without notice. Customers should obtain the latest relevant information for
reference. Testing and quality control techniques are used to screen the parameters. Testing of all
parameters of each product is not necessarily performed.
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