GENERAL DESCRIPTION   

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 applicati***, 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）.

 APPLICATI***

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.  

 FEATURES

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

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

 Package

TSSOP20    ***ailable, pb free【RoHS】