TMPA205DS

Tai-1 Microelectronics www.taimec.com.tw TMPA205DS December 2004 2.45-W/Ch STEREO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER GENERAL DESCRIPTION The TMPA205DS is a stereo class-D filter–free audio power amplifier IC. It delivers up to 2.45W/Ch power into a 4 ohm load or 1.5W/Ch power into an 8 ohm load. Two patents are pending. With common mode input structure, TMPA205DS requires no input or output coupling capacitors. It also features high Common Mode Rejection Ratio and Power Supply Rejection Ratio. 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. 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） . ♦ Differential Signal Processing Improves CMRR & ♦ Less Than 0.3uA Shutdown Current ♦ Popless Power-Up, Shutdown and Recovery ♦ Differential 250 KHz PWM Allows Bridge-Tied Load to Doubles Output Power and Eliminates LC Output Filter ♦ Common Mode Structure Requires No Input Capacitors ♦ BTL Output Requires No Output Capacitors ♦ Thermal Shutoff and Automatic Recovery ♦ Short-Circuit Protection ♦ Up to 92% Power Efficiency ♦ 3.5mA Quiescent Current FEATURES ♦ 2.5V to 5.5V Single Supply ♦ Up to 5.3W/Ch Max. Power or 2.45W/Ch rms. Eliminates Power Regulation & Bypass Capacitor AP...