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LM4858MM Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4858MM Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 17 page  LM4858 Mono 1.5 W / Stereo 300mW Power Amplifier General Description The LM4858 is an audio power amplifier capable of deliver- ing 1.5W (typ) of continuous average power into a mono 4 Ω bridged-tied load (BTL) with 1% THD+N or 95mW per chan- nel of continuous average power into stereo 32 Ω single- ended (SE) loads with 1% THD+N, using a 5V power supply. The LM4858 can automatically switch between mono BTL and stereo SE modes utilizing a headphone sense pin. It is ideal for any system that provides both a monaural speaker output and a stereo line or headphone output Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4858 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4858 features an externally controlled, micropower consumption shutdown mode and thermal shutdown protec- tion. The unity-gain stable LM4858’s gain is set by external gain-setting resistors Key Specifications n Output Power at 1% THD+N, 1kHz: n LM4858LD 3 Ω BTL 1.9W (typ) n LM4858LD 4 Ω BTL 1.7W (typ) n LM4858MM 4 Ω BTL 1.5W (typ) n LM4858MM,LD 8 Ω BTL 1.1W (typ) n LM4858MM,LD 8 Ω SE 300mW (typ) n LM4858MM,LD 32 Ω SE 95mW (typ) n THD+N at 1kHz, 95mW into 32 Ω SE 1% (typ) n Single Supply Operation 2.4 to 5.5V n Shutdown Current 18µA (typ) Features n Mono 1.5W BTL or stereo 300mW output n Logic controlled headphone sense n “Click and pop” suppression circuitry n No bootstrap capacitors required n Thermal shutdown protection n Unity-gain stable n Available in space-saving MSOP and LLP packaging Applications n Portable computers n Desktop computers n PDA’s n Handheld games Connection Diagrams 20064729 Top View 10 Lead MSOP Order Number LM4858MM See NS Package Number MUB10A 20064728 Top View 14 Lead LLP Order Number LM4858LD See NS Package Number LDA14A Boomer® is a registered trademark of National Semiconductor Corporation. May 2003 © 2003 National Semiconductor Corporation DS200647 www.national.com |
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