TMPA2155DM Datasheet, PDF (1/13 Pages) Micro Electronics – 2.7-W MONO CLASS-D AUDIO POWER AMPLIFIER

tai'mec
Preliminary
www.taimec.com.tw / www.class-d.com.tw
TMPA2155DM
Rev.1.0 August 15, 2007
2.7-W MONO CLASS-D AUDIO POWER AMPLIFIER
GENERAL DESCRIPTION
The TMPA2155DM is a mono class-D audio power amplifier IC.
With BTL(Bridge-Tied-Load) configuration, 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. No external heat-sink is
required.
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.
Automatic voltage gain control makes the best use of battery.
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）.
FEATURES
♦ 2.5V to 6V Single Supply
♦ Up to 2.7W at 5V, 3 ohms
♦ Up to 85% Power Efficiency
♦ Automatic output power control (APC)
♦ 2.2mA Quiescent Current at 5V
♦ Less Than 0.2uA Shutdown Current
♦ Pop-less Power-Up, Shutdown and Recovery
♦ Differential 250 KHz PWM Allows BTL to Doubles
Output Power and Eliminates LC Output Filter
♦ Compatible with earphone application
♦ Thermal Shutoff and Automatic Recovery
♦ Short-Circuit Protection
♦ Differential Signal Processing Improves CMRR
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
Package
TSSOP8, SOP8 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.
Copyright ©2005, Tai-1 Microelectronics Corp.
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