National Semiconductors LM3886T-NSC Datasheet

LM3886 Overture™Audio Power Amplifier SeriesHigh-Performance 68W Audio Power Amplifier w/MuteGeneral DescriptionThe LM3886 is a high-performance audio

Typical Performance Characteristics (Continued)Pulse Power Limit Pulse Power Limit0118332301183324Supply Current vsCase TemperatureInput Bias Current

Typical Performance Characteristics (Continued)THD+NvsFrequency THD+NvsFrequency01183329 01183330THD+NvsFrequency THD+NvsOutput Power01183331 01183332

Typical Performance Characteristics (Continued)THD+NvsOutput Power THD+NvsOutput Power01183335 01183336THD+NvsOutput Power THD+NvsOutput Power01183337

Typical Performance Characteristics (Continued)THD + N Distribution THD + N Distribution01183341 01183342THD + N Distribution THD + N Distribution0118

Typical Performance Characteristics (Continued)Max Heatsink Thermal Resistance (˚C/W)at the Specified Ambient Temperature (˚C)Maximum Power Dissipatio

Typical Performance Characteristics (Continued)IMD 60 Hz, 7 kHz, 4:1 IMD 60 Hz, 7 kHz, 4:10118335101183352IMD 60 Hz, 1:1 IMD 60 Hz, 7 kHz 1:101183353

Typical Performance Characteristics (Continued)Mute Attenuation vsMute Current Large Signal Response01183357 01183358Power SupplyRejection RatioCommon

Application InformationGENERAL FEATURESMute Function: The muting function of the LM3886 allowsthe user to mute the music going into the amplifier by d

Application Information (Continued)Determining Maximum Power DissipationPower dissipation within the integrated circuit package is avery important par

Application Information (Continued)Typical signal-to-noise figures are listed for an A-weightedfilter which is commonly used in the measurement of noi

Connection DiagramPlastic Package (Note 12)01183302Note 1: Preliminary: call you local National Sales Rep. or distributor for availabilityTop ViewOrde

Application Information (Continued)phase, can feedback in a similar manner and cause insta-bilities. Out of phase ground loops also are troublesome,ca

Application Information (Continued)The minimum gain from Equation (8) is: AV≥ 12.6We select a gain of 13 (Non-Inverting Amplifier); resulting ina sens

Definition of Terms (Continued)applies with the output transistors conducting alternately at ahigh enough frequency that the peak capability of neithe

Physical Dimensions inches (millimeters)unless otherwise notedOrder Number LM3886TNS Package Number TA11BOrder Number LM3886TFNS Package Number TF11BL

NotesLIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WR

Absolute Maximum Ratings (Notes 6, 5)If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Dist

Electrical Characteristics (Notes 5, 6) (Continued)The following specifications apply for V+= +28V, V−= −28V, IMUTE= −0.5 mA with RL=4Ω unless otherwi

Test Circuit #1 (DC Electrical Test Circuit)01183303Test Circuit #2 (AC Electrical Test Circuit)01183304LM3886www.national.com5

Single Supply Application Circuit01183305*Optional components dependent upon specific design requirements. Refer to the ExternalComponents Description

Equivalent Schematic (excluding active protection circuitry)01183306LM3886www.national.com7

External Components Description(Figure 1 and Figure 2)Components Functional Description1. RINActs as a volume control by setting the voltage level all

Typical Performance CharacteristicsSafe AreaSPiKeProtection Response0118331801183319Supply Current vsSupply Voltage Pulse Thermal Resistance01183320 0