LM4863LQ Datasheet, PDF (1/28 Pages) Texas Instruments – Dual 2.2W Audio Amplifier Plus Stereo Headphone Function

LM4863
www.ti.com
SNAS114F – OCTOBER 1999 – REVISED MAY 2013
LM4863
Dual 2.2W Audio Amplifier Plus Stereo
Headphone Function
Check for Samples: LM4863
FEATURES
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APPLICATIONS
•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
• 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.
.
NOTE
An LM4863MTE or LM4863LQ that has been properly mounted to a circuit board will
deliver 2.2W into 4Ω. The other package options for the LM4863 will deliver 1.1W into 8Ω.
See Application Information for further information concerning the LM4863MTE and
LM4863LQ.
NOTE
An LM4863MTE or LM4863LQ that has been properly mounted to a circuit board and
forced-air cooled will deliver 2.5W into 3Ω.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated