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】