TA2021B

Tripath Technology, Inc. - Technical Information TA2021B STEREO 25W (4 Ω ) CLASS-T™ DIGITAL AUDIO AMPLIFIER DRIVER USING DIGITAL POWER PROCESSING (DPP™) TECHNOLOGY Technical Information Revision 4.0 – July 2003 General Description The TA2021B is a 25W (4Ω) continuous average per channel Class-T Digital Audio Power Amplifier IC using Tripath’s proprietary Digital Power Processing (DPPTM) technology. Class-T amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D amplifiers. Applications DVD Receivers Mini/Micro Component Systems Computer / PC Multimedia Cable Set-Top Products Televisions Battery Powered Systems Features Class-T architecture Single Supply Operation “Audiophile” Quality Sound 0.05% THD+N @ 13W 4Ω 0.1% THD+N @15.5W 4Ω 0.1% IHF-IM @ 1W 4Ω High Power 25W @ 4Ω, 10% THD+N, VDD=14.6V 23.5W @ 4Ω, 10% THD+N, VDD=14.2V 14W @ 8Ω, 10% THD+N, VDD=14.2V High Efficiency 88% @ 13.5W 8Ω 81% @ 25W 4Ω Dynamic Range = 100 dB Mute and Sleep inputs Turn-on & turn-off pop suppression Over-current protection Over-temperature protection Bridged outputs 36-pin PSOP “Slug-Up” package Benefits Fully integrated solution with internal FETs Easier to design-in than Class-D Dramatically improves efficiency versus Class-AB amplifiers Signal fidelity equal to high quality linear amplifiers High dynamic range compatible with digital media such as CD and DVD, and internet audio Typical Performance THD+N vs Output Power 10 5 2 THD+N (%) 1 0.5 0.2 0.1 RL=4Ω RL...