TMPA218DS

· 2.5V to 6V Single Supply
· Up to 3.5W / Ch at 5.5V, 2 ohms
· Up to 88% Power Efficiency
· Automatic output power control (APC)
· Memory of voltage gain at shutdown
· 0dB to -60dB attenuation from max. voltage gain
· 2.2mA / Ch Quiescent Current at 5V
· Less Than 0.2uA / Ch Shutdown Current
· Pop-less Power-Up, Shutdown and Recovery
· Differential 250 KHz PWM Allows Bridge-Tied Load to increase Output Power and Eliminates LC Output Filter
· Thermal Shutoff and Automatic Recovery
· Compatible with earphone application
· Output Pin Short-Circuit Protection (Short to Other Outputs, Short to VCC, Short to Ground)
· Differential Signal Processing Improves CMRR

Multimedia application includes Cellular Phones, PDAs, DVD/CD players, TFT LCD TVs/Monitors, 2.1 channel audio systems, USB audio. It is also ideal for other portabledevices like Wireless Radios.

(1) Stresses beyond those listed under"absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated  nder "recommended operating conditions "is not implied. Exposure to absolute-maximum-rated onditions for extended periods may affect device reliability.

The TMPA218DS is a stereo class-D audio power amplifier IC with digital volume control. With BTL (Bridge-Tied-Load) configuration, it delivers up to 3.5W/ch (7W in all) into a 2 ohm load. Up and down volume control signals provide -60dB attenuation form maximum voltage gain. 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 output power 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).