1FEATURES
23• E2S System Reduces EMI Preserving Audio
Quality and Efficiency
• Output Short Circuit Protection
• Stereo Class D Operation
• No Output Filter Required
• Texas Instruments 3D Enhancement
• Minimum External Components
• Click and Pop Suppression
• Micro-Power Shutdown
• Available in Space-Saving Approximately 2mm
x 2.2mm DSBGA Package

APPLICATIONS
• Mobile Phones
• PDAs
• Laptops

KEY SPECIFICATIONS
• Quiescent Power Supply Current at 3.6V
Supply 4mA (Typ)
• Power Output at VDD = 5V, RL = 8Ω, THD ≤ 1%
1.2 W (Typ)
• Shutdown Current 0.03μA (Typ)
• Efficiency at 3.6V, 100mW into 8Ω 80% (Typ)
• Efficiency at 3.6V, 500mW into 8Ω 80% (Typ)
• Efficiency at 5V, 1W into 8Ω 86% (Typ)

DESCRIPTION
The LM48413 is a single supply, high efficiency,
1.2W/channel, filterless switching audio amplifier. The
LM48413 features Texas Instruments' Enhanced
Emissions Suppression (E2S) system - a unique
patented ultra low EMI, spread spectrum, PWM
architecture. It significantly reduces RF emission
while preserving audio quality and efficiency. The E2S
system improves battery life, reduces external
component count, board area consumption, system
cost and product design cycle time. The LM48413TL
is available in a micro-SMD package, further saving space.
The LM48413 is designed to meet the demands of
mobile phones and other portable communication
devices. Operating from a single 5V supply, the device is capable of delivering 1.2W/channel of
continuous output power to a 8Ω load with less than
1% THD+N. Flexible power supply requirements
allow operation from 2.4V to 5.5V. The wide band
spread spectrum architecture of the LM48413
reduces EMI-radiated emissions due to the modulator
frequency.
The LM48413 features high efficiency compared with
conventional Class AB amplifiers. The E2S system
includes an advanced, patent-pending edge rate
control (ERC) architecture that further reduce
emissions by minimizing the high frequency
components of the device output, while maintaining
its high quality audio reproduction and high efficiency
(η = 85% at VDD = 3.6V, PO = 500mW). The LM48413
also includes Texas Instruments' 3D audio enhancement that improves stereo sound quality. In
devices where the left and right speakers are in close
proximity, 3D enhancement affects channel
specialization, widening the perceived soundstage.
Output short circuit protection prevents the device
from being damaged during fault conditions. Superior
click and pop suppression eliminates audible
transients on power up/down and during shutdown.
Shutdown control also provided to maximizes power
savings.