DatasheetsPDF.com

LM3876 Dataheets PDF



Part Number LM3876
Manufacturers National Semiconductor
Logo National Semiconductor
Description High-Performance 56W Audio Power Amplifier
Datasheet LM3876 DatasheetLM3876 Datasheet (PDF)

LM3876 Overture Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute April 1995 LM3876 Overture™ Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute General Description The LM3876 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8Ω load with 0.1% (THD + N) from 20 Hz–20 kHz. The performance of the LM3876, utilizing its Self Peak Instantaneous Temperature (˚Ke) (SPiKe™) Protection Circuit.

  LM3876   LM3876



Document
LM3876 Overture Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute April 1995 LM3876 Overture™ Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute General Description The LM3876 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8Ω load with 0.1% (THD + N) from 20 Hz–20 kHz. The performance of the LM3876, utilizing its Self Peak Instantaneous Temperature (˚Ke) (SPiKe™) Protection Circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe Protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The LM3876 maintains an excellent Signal-to-Noise Ratio of greater than 95 dB(min) with a typical low noise floor of 2.0 µV. It exhibits extremely low (THD + N) values of 0.06% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%. Features 56W continuous average output power into 8Ω 100W instantaneous peak output power capability Signal-to-Noise Ratio ≥ 95 dB(min) An input mute function Output protection from a short to ground or to the supplies via internal current limiting circuitry n Output over-voltage protection against transients from inductive loads n Supply under-voltage protection, not allowing internal biasing to occur when |VEE| + |VCC| ≤ 12V, thus eliminating turn-on and turn-off transients n 11-lead TO-220 package n n n n n Applications n n n n n Component stereo Compact stereo Self-powered speakers Surround-sound amplifiers High-end stereo TVs Overture™ and SPiKe™ Protection are trademarks of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS011832 www.national.com Typical Application DS011832-1 *Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component functional description. FIGURE 1. Typical Audio Amplifier Application Circuit Connection Diagram Plastic Package (Note 11) DS011832-2 †Connect Pin 5 to V+ for Compatibility with LM3886. Top View Order Number LM3876T or LM3876TF See NS Package Number TA11B for Staggered Lead Non-Isolated Package or TF11B for Staggered Lead Isolated Package www.national.com 2 Absolute Maximum Ratings (Notes 4, 5) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage |V+|+|V−| (No Signal) Supply Voltage |V+|+|V−| (Input Signal) Common Mode Input Voltage Differential Input Voltage Output Current Power Dissipation (Note 6) ESD Susceptibility (Note 7) Junction Temperature (Note 8) Soldering Information T Package (10 seconds) 94V 84V (V+ or V−) and |V+| + |V−| ≤80V 60V Internally Limited 125W 3000V 150˚C 260˚C Storage Temperature Thermal Resistance θJC θJA −40˚C to +150˚C 1˚C/W 43˚C/W Operating Ratings (Notes 4, 5) Temperature Range TMIN ≤ TA ≤ TMAX Supply Voltage |V+| + |V−| −20˚C ≤ TA ≤ +85˚C 24V to 84V Note 1: Operation is guaranteed up to 84V, however, distortion may be introduced from SPiKe Protection Circuitry when operating above 70V if proper thermal considerations are not taken into account. Refer to the Thermal Considerations section for more information. (See SPiKe Protection Response) Electrical Characteristics (Notes 4, 5) The following specifications apply for V+ = +35V, V− = −35V, IMUTE = −0.5 mA with RL = 8Ω unless otherwise specified. Limits apply for TA = 25˚C. Symbol Parameter Conditions LM3876 Typical |V+| + |V−| AM Power Supply Voltage (Note 13) Mute Attenuation Vpin7 − V− ≥ 9V Pin 8 Open or at 0V, Mute: On Current out of Pin 8 > 0.5 mA, Mute: Off PO (Note 3) Peak PO THD + N SR (Note 3) I+ (Note 2) VOS (Note 2) IB IOS Io Vod (Note 2) PSRR (Note 2) Output Power (Continuous Average) Instantaneous Peak Output Power Total Harmonic Distortion Plus Noise Slew Rate (Note 12) 40W, 20 Hz ≤ f ≤ 20 kHz AV = 26 dB VIN = 1.2 Vrms, f = 10 kHz, Square-Wave, RL = 2 kΩ VCM = 0V, Vo = 0V, Io = 0A, Imute = 0A VCM = 0V, Io = 0 mA VCM = 0V, Io = 0 mA VCM = 0V, Io = 0 mA |V+| = |V−| = 12V, tON = 10 ms, VO = 0V |V+–VO|, V+ = 20V, Io = +100 mA |VO–V−|, V− = −20V, Io = −100 mA V+ = 40V to 20V, V− = −40V, VCM = 0V, Io = 0 mA V+ = 40V, V− = −40V to −20V, VCM = 0V, Io = 0 mA CMRR (Note 2) AVOL (Note 2) GBWP Common Mode Rejection Ratio Open Loop Voltage Gain Gain-Bandwidth Product V+ = 60V to 20V, V− = −20V to −60V, VCM = 20V to −20V, Io = 0 mA |V+| = |V−| = 40V, RL = 2 kΩ, ∆VO = 60V |V+| = |V−| = 40V fO = 100 kHz, VIN = 50 mVrms 3 Limit 24 84 Units (Limits) (Note 9) (Note 10) 18 V (min) V (max) dB (min) W (min) W % V/µs (min) mA (max) mV (max) µA (max) µA (max) A (min) V (max) V (max) dB (min) dB (min) d.


LM3875 LM3876 LM388


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)