TMPA2155DS

·2.5V to 6V Single Supply
·Up to 2.7W / Ch at 5V, 3 ohms
·Up to 85% Power Efficiency
·Automatic output power control (APC)
·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 Doubles 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

(1) Stresses beyond those listed under"absolutemaximum 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 under "recommended operating conditions "is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

The TMPA2155DS is a stereo class-D audio power amplifier IC. With BTL(Bridge-Tied-Load) configuration, it delivers up to 2.7W/ch(5.4W in all) into a 3 ohm load or 2.3W/ch(4.6W in all) into a 4 ohm load or 1.5W/ch(3W in all) 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(PulseWidth Modulation)