Datasheet ТI LM48512TLX/NOPB — Даташит

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 "Click and Pop" suppression 2 E S System Reduces EMI while Preserving
Audio Quality and Efficiency
Integrated Boost Converter
Supply Voltage Level Detection on Boost
Converter
Low Power Shutdown Mode 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 device
output, while maintaining high quality audio reproduction (THD+N = 0.03%) and high efficiency. A low power
shutdown mode reduces supply current consumption to 0.04ОјA. …