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LM48410SQX/NOPB
Low EMI, Filterless, 2.3W Stereo Class D Audio Pwr Amp w/ Natl 3D Enhancement
LM48410
www.ti.com SNAS403E –FEBRUARY 2007–REVISED MAY 2013
LM48410 Low EMI, Filterless, 2.3W Stereo ClassD Audio
Power Amplifier with 3D Enhancement
Checkfor Samples: LM48410
1FEATURES DESCRIPTIONThe LM48410isa single supply, high efficiency,
Selectable Spread Spectrum Mode Reduces 2.3W/channel, filterless switching audio amplifier.A
EMI low noise PWM architecture eliminates the output
• Output Short Circuit Protection filter, reducing external component count, board area
Stereo ClassD Operation consumption, system cost, and simplifying design.A
selectable spread spectrum modulation scheme
• No Output Filter Required suppresses RF emissions, further reducing the need
• 3D Enhancement for output filters.
Logic Selectable Gain The LM48410is designedto meet the demandsof
• Independent Channel Shutdown Controls mobile phones and other portable communication
Minimum External Components devices. Operating froma single 5V supply, the
device is capable of delivering 2.3W/channel of
• Click and Pop Suppression continuous output powertoa 4Ω load with less than
• Micro-Power Shutdown 10% THD+N. Flexible power supply requirements
Availablein Space-Saving 4mmx 4mm WQFN allow operation from 2.4V to 5.5V. The LM48410
Package offers two logic selectable modulation schemes, fixed
frequency mode, and an EMI reducing spread
spectrum mode.
APPLICATIONSThe LM48410 features high efficiency compared with
• Mobile Phonesconventional Class AB amplifiers. When driving an
• PDAs 8Ω speaker froma 3.6V supply, the device operates
• Laptops with 85% efficiencyat PO= 500mW/Ch. Four gain
options are pin selectable through the G0 and G1
KEY SPECIFICATIONS pins. The LM48410 also includes 3D audio
enhancement that improves stereo sound quality.In
• Quiescent Power Supply Currentat 3.6V devices where the left and right speakers arein close
supply 4mA proximity, 3D enhancement affects channel
• Power Outputat VDD= 5V,RL= 4Ω, THD≤ 10% specialization, widening the perceived soundstage.
2.3W (typ) Output short circuit protection prevents the device
= 5V,RL= 8Ω, THD≤ 10% from being damaged during fault conditions. Superior click and pop suppression eliminates audible
transients on power-up/down and during shutdown.
Independent left/right shutdown controls maximizes mono/stereo applications.
