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1FEATURES

2? Stereo Headphone Amplifier Mode

? “Click and Pop” Suppression Circuitry

? Unity-Gain Stable

? Thermal Shutdown Protection Circuitry

? SOIC, TSSOP, exposed-DAP TSSOP, and

WQFN packages

KEY SPECIFICATIONS

? PO at 1% THD+N

– LM4863LQ, 3Ω, 4Ω loads: 2.5W(typ),

2.2W(typ)

– LM4863MTE, 3Ω, 4Ω loads: 2.5W(typ),

2.2W(typ)

– LM4863MTE, 8Ω load: 1.1W(typ)

– LM4863, 8Ω: 1.1W(typ)

? Single-ended mode THD+N at 75mW into 32Ω:

0.5%(max)

? Shutdown current: 0.7μA(typ)

? Supply voltage range: 2.0V to 5.5V

APPLICATIONS

? Multimedia Monitors

? Portable and Desktop Computers

? Portable Televisions

DESCRIPTION

The LM4863 is a dual bridge-connected audio power

amplifier which, when connected to a 5V supply, will

deliver 2.2W to a 4Ω load or 2.5W to a 3Ω load with less than 1.0% THD+N (see Notes below). In

addition, the headphone input pin allows the

amplifiers to operate in single-ended mode when

driving stereo headphones.

Boomer audio power amplifiers were designed

specifically to provide high quality output power from

a surface mount package while requiring few external components. To simplify audio system design, the

LM4863 combines dual bridge speaker amplifiers and

stereo headphone amplifiers on one chip.

The LM4863 features an externally controlled, low-

power consumption shutdown mode, a stereo

headphone amplifier mode, and thermal shutdown

protection. It also utilizes circuitry to reduce “clicks

and pops” during device turn-on.