TAS5111A

www.ti.com DIGITAL AMPLIFIER POWER STAGE TAS5111A SLES111 − AUGUST 2005 TM FEATURES D 70-W RMS Power (BTL) Into 4 Ω With Less Than 0.2% THD+N D 95-dB Dynamic Range (TDAA System With TAS5026) D Power Efficiency Greater Than 90% Into 4-Ω and 8-Ω Loads − Smaller Power Supplies D Self-Protecting Design With Autorecovery D 32-Pin TSSOP (DAD) PowerPAD Package D 3.3-V Digital Interface D EMI-Compliant When Used With Recommended System Design APPLICATIONS D DVD Receiver THD + NOISE vs OUTPUT POWER 1 RL = 4 Ω TC = 75°C 0.1 D Home Theatre D Mini/Micro Component Systems D Internet Music Appliance DESCRIPTION The TAS5111A is a high-performance digital amplifier power stage designed to drive a 4-Ω speaker up to 70 W with 0.2% distortion plus noise. The device incorporates TI’s PurePath Digital technology and is used with a digital audio PWM processor (TAS50XX) and a simple passive demodulation filter to deliver high-quality, high-efficiency digital audio amplification. The efficiency of this digital amplifier can be greater than 90%, depending on the system design. Overcurrent protection, overtemperature protection, and undervoltage protection are built into the TAS5111A, safeguarding the device and speakers against fault conditions that could damage the system. THD + NOISE vs FREQUENCY 1 RL = 4 Ω TC = 75°C 0.1 PO = 70 W PO = 1 W PO = 10 W 0.01 THD+N − Total Harmonic Distortion + Noise − % THD+N − Total Harmonic Distortion + Noise − % 0.01 100m 1 10 PO − Output Power − W 0...