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LM4780  Product Folder

Overture Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute
Generic P/N 4780
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) -20 
Temperature Max (deg C) 85 
Channels (Channels) 2 
User Supply (Volt) 70 
Supply Range ± 20 - ± 84 V 
Gain Bandwidth (MHz) 8 
Slew Rate (Volts/usec) 19 
PowerAtFourOhms OnePercentTHD (Watt) 55 
PowerAtEightOhms OnePercentTHD (Watt) 60 
PowerAtFourOhms TenPercentTHD (Watt) - 
PowerAtEightOhms TenPercentTHD (Watt) - 
SNR (dB) 114 
SNR Conditions Po=50Wrms, A-weighted filter, f-in-1kHz, Rs=25ohms 
PSRR (dB) 120 
PSRR Conditions V==40V to20V, V-=-40V, Vcm=0V, Io=omA 
THD (%) .03 
THD Conditions 70V, Rl=8ohms 

Datasheet

TitleSize in KbytesDate
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LM4780 Overture Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute 1030 Kbytes 2-Jul-03 View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4780TATO 22027StatusFull productionN/AN/ASamples
Buy Now		1K+$3.25rail
of
15		NSUZXYTT
L4780TA
3 weeks0

General Description

The LM4780 is a stereo audio amplifier capable of typically delivering 60W per channel of continuous average output power into an 8 load with less than 0.5% THD+N from 20Hz - 20kHz.

The LM4780 is fully protected utilizing National's Self Peak Instantaneous Temperature (°Ke) (SPiKeTM) protection circuitry. SPiKe provides a dynamically optimized Safe Operating Area (SOA). SPiKe protection completely safeguards the LM4780's outputs against over-voltage, under-voltage, overloads, shorts to the supplies or GND, thermal runaway and instantaneous temperature peaks. The advanced protection features of the LM4780 places it in a class above discrete and hybrid amplifiers.

Each amplifier of the LM4780 has an independent smooth transition fade-in/out mute.

The LM4780 can easily be configured for bridge or parallel operation for 120W mono solutions.

Features

  • SPiKe Protection
  • Low external component count
  • Quiet fade-in/out mute mode
  • Wide supply range: 20V - 84V
  • Signal-to-Noise Ratio >= 97dB (ref. to PO = 1W)

Key Specification

Output Power/Channel with 0.5% THD+N, 1kHz into 8

60W (typ)

THD+N at 2 x 30W into 8 (20Hz - 20kHz)

0.03% (typ)

THD+N at 2 x 30W into 6 (20Hz - 20kHz)

0.05% (typ)

THD+N at 2 x 30W into 4 (20Hz - 20kHz)

0.07% (typ)

Mute Attenuation

110dB (typ)

PSRR

85dB (min)

Slew Rate

19V/µs (typ)

Applications

  • Audio amplifier for component stereo
  • Audio amplifier for compact stereo
  • Audio amplifier for self-powered speakers
  • Audio amplifier for high-end and HD TVs

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM4780TAHV70008800006000006169643205

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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