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LM4863 Dataheets PDF



Part Number LM4863
Manufacturers National Semiconductor
Logo National Semiconductor
Description Dual 2.2W Audio Amplifier
Datasheet LM4863 DatasheetLM4863 Datasheet (PDF)

LM4863 Dual 2.2W Audio Amplifier Plus Stereo Headphone Function October 1999 LM4863 Dual 2.2W Audio Amplifier Plus Stereo Headphone Function General 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 (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 to drive stereo headphones. Boomer audio power ampli.

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LM4863 Dual 2.2W Audio Amplifier Plus Stereo Headphone Function October 1999 LM4863 Dual 2.2W Audio Amplifier Plus Stereo Headphone Function General 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 (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 to drive 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 1: An LM4863MTE which has been properly mounted to the circuit board will deliver 2.2W into 4Ω. The other package options for the LM4863 will deliver 1.1W into 8Ω. See the Application Information section for LM4863MTE usage information. Note 2: An LM4863MTE which has been properly mounted to the circuit board and forced-air cooled will deliver 2.5W into 3Ω. Key Specifications n PO at 1% THD+N into 3Ω (LM4863MTE) into 4Ω (LM4863MTE) into 8Ω (LM4863) n Single-ended mode - THD+N at 75mW into 32Ω n Shutdown current 2.5W(typ) 2.2W(typ) 1.1W(typ) 0.5%(max) 0.7µA(typ) Features n n n n n Stereo headphone amplifier mode “Click and pop” suppression circuitry Unity-gain stable Thermal shutdown protection circuitry Exposed-DAP TSSOP, TSSOP, SOIC and DIP packaging available Applications n Multimedia monitors n Portable and desktop computers n Portable televisions Typical Application DS012881-1 * Refer to the section Proper Selection of External Components, for a detailed discussion of CB size. FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS012881 www.national.com LM4863 Connection Diagrams DS012881-28 Top View Order Number LM4863M, LM4863N See NS Package Number M16B for SO See NS Package Number N16A for DIP DS012881-29 Top View Order Number LM4863MT See NS Package Number MTC20 for TSSOP DS012881-2 Top View Order Number LM4863MTE See NS Package Number MXA20A for Exposed-DAP TSSOP www.national.com 2 LM4863 Absolute Maximum Ratings (Note 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage 6.0V Storage Temperature −65˚C to +150˚C Input Voltage −0.3V to VDD +0.3V Power Dissipation (Note 10) Internally limited ESD Susceptibility (Note 11) 2000V ESD Susceptibility (Note 12) 200V Junction Temperature 150˚C Solder Information Small Outline Package Vapor Phase (60 sec.) 215˚C Infrared (15 sec.) 220˚C See AN-450 “Surface Mounting and their Effects on Product Reliablilty” for other methods of soldering surface mount devices. Thermal Resistance θJC (typ) — M16B θJA (typ) — M16B θJC (typ) — N16A θJA (typ) — N16A θJC (typ) — MTC20 θJA (typ) — MTC20 θJC (typ) — MXA20A θJA (typ) — MXA20A θJA (typ) — MXA20A θJA (typ) — MXA20A 20˚C/W 80˚C/W 20˚C/W 63˚C/W 20˚C/W 80˚C/W 2˚C/W 41˚C/W (Note 7) 51˚C/W (Note 5) 90˚C/W (Note 6) Operating Ratings Temperature Range TMIN ≤ TA ≤ TMAX Supply Voltage −40˚C ≤ TA ≤ 85˚C 2.0V ≤ VDD ≤ 5.5V Electrical Characteristics for Entire IC (Notes 3, 4) The following specifications apply for VDD = 5V unless otherwise noted. Limits apply for TA = 25˚C. Symbol Parameter Conditions LM4863 Typical (Note 13) VDD IDD Supply Voltage Quiescent Power Supply Current VIN = 0V, IO = 0A (Note 15) , HP-IN = 0V VIN = 0V, IO = 0A (Note 15) , HP-IN = 4V VPIN1 = VDD 11.5 5.8 0.7 2 4 0.8 Limit (Note 14) 2 5.5 20 6 ISD VIH VIL Shutdown Current Headphone High Input Voltage Headphone Low Input Voltage V (min) V (max) mA (max) mA (min) mA µA (min) V (min) V (max) Units (Limits) Electrical Characteristics for Bridged-Mode Operation (Notes 3, 4) The following specifications apply for VDD = 5V unless otherwise specified. Limits apply for TA = 25˚C. Symbol Parameter Conditions LM4863 Typical (Note 13) VOS PO Output Offset Voltage Output Power (Note 9) VIN = 0V THD = 1%, f = 1 kHz LM4863MTE, RL = 3Ω (Note 7) LM4863MTE, RL = 4Ω (Note 8) LM4863, RL = 8Ω THD+N = 10%, f = 1 kHz LM4863MTE, RL = 3Ω (Note 7) LM4863MTE, RL = 4Ω (Note 8) LM4863, RL = 8Ω THD+N Total Harmonic Distortion+Noise THD+N = 1%, f = 1 kHz, RL = 32Ω 20 Hz ≤ f ≤ 20 kHz, AVD = 2 LM4863MTE, RL = 4Ω, PO = 2W LM4863, RL = 8Ω, PO = 1W VDD = 5V, VRIPPLE = 200 mVRMS, RL = 8Ω, CB = 1.0 µF 3 Limit (Note 14) 50 Units (Limits) 5 2.5 2.2 1.1 3.2 2.7 1.5 0.34 0.3 0.3 67 mV (max) W W 1.0 W (min) W W W % dB PSRR Power Supply Reje.


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