LME49811 Datasheet, PDF (1/18 Pages) Intersil Corporation – High Fidelity 200 Volt Power Amplifier Input Stage with Shutdown

January 4, 2008
LME49811 Audio Power Amplifier Series
High Fidelity 200 Volt Power Amplifier Input Stage with
Shutdown
General Description
The LME49811 is a high fidelity audio power amplifier input
stage designed for demanding consumer and pro-audio ap-
plications. Amplifier output power may be scaled by changing
the supply voltage and number of output devices. The
LME49811 is capable of driving an output stage to deliver in
excess of 500 watts single-ended into an 8 ohm load in the
presence of 10% high line headroom and 20% supply regu-
lation.
The LME49811 includes thermal shut down circuitry that ac-
tivates when the die temperature exceeds 150°C. The
LME49811's shutdown function when activated, forces the
LME49811 into shutdown state.
Key Specifications
■ Wide operating voltage range
■ PSRR (f = DC)
■ THD+N (f = 1kHz)
■ Output Drive Current
Features
■ ^{Very high voltage operation}
■ ^{Scalable output power}
■ ^{Minimum external components}
■ ^{External compensation}
■ ^{Thermal Shutdown}
±20V to ±100V
115dB (typ)
0.00035% (typ)
9mA
Applications
■ ^{Powered subwoofers}
■ ^{Pro audio}
■ ^{Powered studio monitors}
■ ^{Audio video receivers}
■ ^{Guitar Amplifiers}
■ ^{High voltage industrial applications}
Typical Application
FIGURE 1. Typical Audio Amplifier Application Circuit
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