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LM48411TL/NOPB-LM48411TLX/NOPB
Ultra-Low EMI, Filterless, 2.5W, Stereo, Class D Audio Power Amplifier with E 2 S
LM48411
www.ti.com SNAS399G –SEPTEMBER 2007–REVISED MAY 2013
LM48411 Ultra-Low EMI, Filterless, 2.5W, Stereo, ClassD
Audio Power Amplifier withE2S
Checkfor Samples: LM48411
1FEATURES DESCRIPTIONThe LM48411isa single supply, high efficiency,
E2S System Reduces EMI Preserving Audio 2.5W/channel ClassD audio amplifier. The LM48411
Quality and Efficiency features TI's Enhanced Emissions Suppression(E2S)
• Output Short Circuit Protection system, that featuresa unique patent-pending ultra
Stereo ClassD Operation low EMI, spread spectrum, PWM architecture, that
significantly reduces RF emissions while preserving
• No Output Filter Required for Inductive Loads audio quality and efficiency. The E2S system
• Logic Selectable Gain improves battery life, reduces external component
Independent Shutdown Control count, board area consumption, system cost, and
simplifying design.
• Minimum External Components "Click and Pop" Suppression Circuitry The LM48411is designedto meet the demandsof
mobile phones and other portable communication
• Micro-Power Shutdown Mode devices. Operating ona single 5V supply,it is
• Availablein Space-Saving 0.5mm Pitch capable of delivering 2.5W/channel of continuous
DSBGA Package output power toa 4Ω load with less than 10%
THD+N. Its flexible power supply requirements allow
APPLICATIONS operation from 2.4Vto 5.5V. The wide band spread
spectrum architectureof the LM48411 reduces EMI-
• Mobile Phones radiated emissions dueto the modulator frequency.
• PDAsThe LM48411 features high efficiency comparedtoa
• Portable Electronic Devices conventional Class AB amplifier. TheE2S system
includes an advanced, patent-pending edge rate
KEY SPECIFICATIONS control (ERC) architecture that further reduce
emissions by minimizing the high frequency
• Efficiencyat 3.6V, 500mW into 8Ω Speaker:componentof the device output, while maintaining
87% (typ) high quality audio reproduction and high efficiency(η
• Efficiencyat 3.6V, 100mW into 8Ω Speaker: = 87% at VDD= 3.6V, PO= 500mW). Four gain
80% (typ) options are pin selectable through GAIN0 and GAIN1
Efficiencyat 5V, 1W into 8Ω Speaker: pins. The LM48411 featuresa low-power consumption
3.6V 4.2mA (typ) shutdown mode. Shutdown may be enabled by
driving the Shutdown pintoa logic low (GND).
== 4Ω, THD≤ 10%: protection prevents the device
≤ 10%: during fault conditions. Superior click and pop suppression eliminates audible
transients on power during shutdown. Independent left/right control power savingsin mixed
