LM48512

LM48512 www.ti.com SNAS497A – OCTOBER 2010 – REVISED APRIL 2012 LM48512 Boomer® Audio Power Amplifier Series PowerWise® Boosted, Ultra Low-EMI, Mono, E2S Class D Audio Power Amplifier Check for Samples: LM48512 FEATURES 1 2 E2S System Reduces EMI while Preserving Audio Quality and Efficiency Integrated Boost Converter Supply Voltage Level Detection on Boost Converter Low Power Shutdown Mode "Click and Pop" suppression APPLICATIONS Mobile phones Smart phones PDAs DESCRIPTION Part of National’s PowerWise family or products, the LM48512 delivers 1.8W into 8Ω, while consuming 14.5mA of quiescent current. The LM48512 also features National’s Enhanced Emissions Suppression (E2S) system, a patented, ultra low EMI PWM architecture that significantly reduces RF emissions while preserving audio quality and efficiency. LM48512 improves battery life, reduces external component count, board area consumption, system cost, and simplifies design. The LM48512 is designed to meet the demands of portable multimedia devices. The LM48512 features high efficiency compared to other boosted amplifiers and low EMI Class D amplifiers. The LM48512 is capable of driving an 8Ω speaker to 5.5V levels (1.8W) from a 3.6V supply while operating at 82% efficiency. Flexible power supply requirements allow operation from 2.3V to 5.5V. The E2S system features a patented edge rate control (ERC) architecture that further reduces emissions by minimizing the high frequency component of the devic...