GENERAL DESCRIPTION
The TMPA221DS is a 2.1 channel stereo & bass class-D audio
power amplifier IC. It delivers up to 2.7W (bass) and
0.6W(right/left channel each) into 3 ohm loads. The bass
output is designed as BTL (Bridge-Tied-Load) for high output
power. The right & left channels are designed as SE
(Single-Ended). The power efficiency can be up to 82% for 8
ohm load. No external heat-sink is required.
The internal de-pop circuitry eliminates pop noise at
power-up & shutdown operations. Automatic power gain
control makes the best use of battery.
Analog input signal is converted into digital output which
drives directly the speaker. High power efficiency is
achieved due to digital output at the load. The audio
information is embedded in PWM（Pulse Width Modulation）.
APPLICATIONS
Multimedia application includes Cellular Phones, PDAs,
DVD/CD players, 2.1 channel audio systems, USB audio. It
is also ideal for other portable devices like Wireless Radios.
FEATURES
2.5V to 6V Single Supply
Integrated 2.1 channel power amplifiers in one chip
Up to 2.7W(bass)+ 0.6W(right/left Ch) at 5V, 3 ohms
Up to 82% Power Efficiency
Automatic output power control (APC)
Total 4.4mA Quiescent Current at 5V
Less Than 0.4uA Shutdown Current
Pop-less Power-Up, Shutdown and Recovery
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 Available, pb free【RoHS】