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LM4858LD-LM4858LDX
Mono 1.5 W / Stereo 300mW Power Amplifier
LM4858
Mono 1.5 W/ Stereo 300mW Power Amplifier
General DescriptionThe LM4858isan audio power amplifier capableof deliver-
ing 1.5W (typ)of continuous average power intoa mono4Ω
bridged-tied load (BTL) with 1% THD+Nor 95mWper chan-
nelof continuous average power into stereo 32Ω single-
ended (SE) loads with 1% THD+N, usinga5V power supply.
The LM4858 can automatically switch between mono BTL
and stereoSE modes utilizinga headphone sense pin.Itis
idealfor any system that provides botha monaural speaker
output anda stereo lineor headphone output
Boomer audio power amplifiers were designed specificallyto
provide high quality output power witha minimal amountof
external components. Since the LM4858 does not require
bootstrap capacitorsor snubber networks,itis optimally
suitedfor low-power portable systems.
The LM4858 featuresan externally controlled, micropower
consumption shutdown mode and thermal shutdown protec-
tion. The unity-gain stable LM4858’s gainissetby external
gain-setting resistors
Key Specifications Output Powerat 1% THD+N, 1kHz: LM4858LD3Ω BTL 1.9W (typ) LM4858LD4Ω BTL 1.7W (typ) LM4858MM4Ω BTL 1.5W (typ) LM4858MM,LD8Ω BTL 1.1W (typ) LM4858MM,LD8ΩSE 300mW (typ) LM4858MM,LD 32ΩSE 95mW (typ) THD+Nat 1kHz, 95mW into 32ΩSE 1% (typ) Single Supply Operation 2.4to 5.5V Shutdown Current 18µA (typ)
Features Mono 1.5W BTLor stereo 300mW output Logic controlled headphone sense “Click and pop” suppression circuitry No bootstrap capacitors required Thermal shutdown protection Unity-gain stable Availablein space-saving MSOP and LLP packaging
Applications Portable computers Desktop computers PDA’s Handheld games
Connection DiagramsTop View Lead MSOP
Order Number LM4858MM
See NS Package Number MUB10A
Top View Lead LLP
Order Number LM4858LD
See NS Package Number LDA14A
May 2003
LM4858
Mono
Stereo
300mW
Power
Amplifier
