LM4780 - Overture Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute

Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

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)

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. More...


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
  Typical Application
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Parametric Table     expand
Parametric Table    collapse
Power@ 4Ohms, 1% THD 60 Watt
Power@ 8Ohms, 1% THD 55 Watt
THD 0.03 %
PSRR 120 dB
SNR 114 dB
Channels 2 Channels
THD Conditions Po=60W @ Vs=±35V, RL=4ohms
PSRR Conditions V==40V to20V,V-=-40V,Vcm=0V,Io=omA
SNR Conditions Po=50Wrms,A-weighted filter,f-in-1kHz,Rs=25ohms
Power@ 4Ohms, 1% THD 60 Watt
Power@ 8Ohms, 1% THD 55 Watt
THD 0.03 %
PSRR 120 dB
SNR 114 dB
Channels 2 Channels
THD Conditions Po=60W @ Vs=±35V, RL=4ohms
PSRR Conditions V==40V to20V,V-=-40V,Vcm=0V,Io=omA
SNR Conditions Po=50Wrms,A-weighted filter,f-in-1kHz,Rs=25ohms
User Supply 70 Volt
Supply Range +20 - +84V
Mute/Shutdown Mute
Mono/Stereo Mono/stereo
Gain Bandwidth 8 MHz
Slew Rate 19 Volts/usec
Temperature Min -20 deg C
Temperature Max 85 deg C
View Using Catalog


Typical Performance

*click for larger image


  Connection Diagram
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*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4780 Overture Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute 1030 Kbytes 2-Jul-03 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM4780TABDOverture Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with MuteFull productionN/A
 
Buy Now 		1+$151.001-
6 weeksN/A
LM4780TATO-22027NOPB1NARoHS Download Full productionN/A
Samples
Buy Now 		1K+$6.16rail
of
15		NSUZXYTTE#
L4780TA
12 weeks500

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.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4780TAHV7000135800012225003346887713

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 3-Jul-2009]