LME49830 Datasheet, PDF (1/23 Pages) National Semiconductor (TI) – Mono High Fidelity 200 Volt MOSFET Power Amplifier Input Stage with Mute

LME49830
www.ti.com
SNAS396D – JANUARY 2008 – REVISED APRIL 2013
LME49830 Mono High Fidelity 200 Volt MOSFET Power Amplifier Input Stage with Mute
Check for Samples: LME49830
FEATURES
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•2 High Output Current and Voltage for Use With
MOSFET Output Stages
• Very High Voltage Range: ±20V to ±100V
• Scalable Output Power
• Minimum External Components
• External Compensation
• Thermal Shutdown of Input Stage
• Mute Control
APPLICATIONS
• AV Receivers
• Audiophile Power Amps
• Pro Audio
• High Voltage Industrial Applications
KEY SPECIFICATIONS
• Wide Operating Voltage Range: ±20V to ±100V
• Output Voltage Noise
– (BW = 30kHz): 44μV (Typ)
• PSRR (DC): 105dB (Typ)
• Slew Rate: 39V/μs (Typ)
• THD+N (f = 1kHz): 0.0006% (Typ)
DESCRIPTION
The LME49830 is a high fidelity audio power amplifier
input stage designed for demanding consumer and
pro-audio applications. Amplifier output power may be
scaled by changing the supply voltage and number of
output devices. The LME49830 is capable of driving
an output stage in excess of 300 W single-ended into
an 8Ω load in the presence of 10% high line
headroom and 20% supply regulation.
The LME49830 includes internal thermal shut down
circuitry that activates when the LME49830 die
temperature exceeds 150°C. The LME49830 has a
mute function that mutes the input drive signal and
forces the amplifier output to a quiescent state.
The LME49830 has high drive current, 56mA typical,
and high output voltage swing for maximum flexibility
in output stage choice. With a bias voltage range up
to 16V the LME49830 can be used to drive MOSFET
output stages using a wide selection of MOSFETs.
The LME49830 has a wide operating supply range of
±20V to ±100V, which allows lower cost, unregulated
power supplies to be used.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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