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LM4863 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4863 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 21 page LM4863 Dual 2.2W Audio Amplifier Plus Stereo Headphone Function General Description The LM4863 is a dual bridge-connected audio power ampli- fier which, when connected to a 5V supply, will deliver 2.2W toa4 Ω load (Note 1) or 2.5W to a 3Ω load (Note 2) with less than 1.0% THD+N. 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 sim- plify 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 cir- cuitry to reduce “clicks and pops” during device turn-on. Note 1: An LM4863MTE or LM4863LQ that has been properly mounted to a circuit board will deliver 2.2W into 4 Ω. The other package options for the LM4863 will deliver 1.1W into 8 Ω. See the Application Information sections for further information concerning the LM4863MTE and LM4863LQ. Note 2: An LM4863MTE or LM4863LQ that has been properly mounted to a circuit board and forced-air cooled will deliver 2.5W into 3 Ω. Key Specifications n P O at 1% THD+N n LM4863LQ, 3 Ω,4Ω loads 2.5W(typ), 2.2W(typ) n LM4863MTE, 3 Ω,4Ω loads 2.5W(typ), 2.2W(typ) n LM4863MTE, 8 Ω load 1.1W(typ) n LM4863, 8 Ω 1.1W(typ) n Single-ended mode THD+N at 75mW into 32 Ω 0.5%(max) n Shutdown current 0.7µA(typ) n Supply voltage range 2.0V to 5.5V Features n Stereo headphone amplifier mode n “Click and pop” suppression circuitry n Unity-gain stable n Thermal shutdown protection circuitry n SOIC, TSSOP, exposed-DAP TSSOP, and LLP packages * Not recommended for new designs. Contact NSC Audio Marketing. Applications n Multimedia monitors n Portable and desktop computers n Portable televisions Typical Application 01288101 Note: Pin out shown for SO package. Refer to the Connection Diagrams for the pinout of the TSSOP, Exposed-DAP TSSOP, and Exposed-DAP LLP packages. Boomer® is a registered trademark of National Semiconductor Corporation. October 2006 © 2006 National Semiconductor Corporation DS012881 www.national.com |
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