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LM48410 Datasheet(PDF) 1 Page - Texas Instruments |
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LM48410 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 24 page LM48410 www.ti.com SNAS403E – FEBRUARY 2007 – REVISED MAY 2013 LM48410 Low EMI, Filterless, 2.3W Stereo Class D Audio Power Amplifier with 3D Enhancement Check for Samples: LM48410 1 FEATURES DESCRIPTION The LM48410 is a single supply, high efficiency, 2 • 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 Class D 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 LM48410 is designed to meet the demands of • Independent Channel Shutdown Controls mobile phones and other portable communication • Minimum External Components devices. Operating from a single 5V supply, the device is capable of delivering 2.3W/channel of • Click and Pop Suppression continuous output power to a 4 Ω load with less than • Micro-Power Shutdown 10% THD+N. Flexible power supply requirements • Available in Space-Saving 4mm x 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. APPLICATIONS The LM48410 features high efficiency compared with • Mobile Phones conventional Class AB amplifiers. When driving an • PDAs 8 Ω speaker from a 3.6V supply, the device operates • Laptops with 85% efficiency at 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 Current at 3.6V devices where the left and right speakers are in close supply 4mA proximity, 3D enhancement affects channel • Power Output at VDD = 5V, RL = 4Ω, THD ≤ 10% specialization, widening the perceived soundstage. 2.3W (typ) Output short circuit protection prevents the device • Power Output at VDD = 5V, RL = 8Ω, THD ≤ 10% from being damaged during fault conditions. Superior 1.5W (typ) click and pop suppression eliminates audible transients on power-up/down and during shutdown. • Shutdown current 0.03 μA (typ) Independent left/right shutdown controls maximizes • Efficiency at 3.6V, 100mW into 8 Ω 80% (typ) power savings in mixed mono/stereo applications. • Efficiency at 3.6V, 500mW into 8 Ω 85% (typ) • Efficiency at 5V, 1W into 8 Ω 86% (typ) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2007–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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