LME49810 Datasheet, PDF (1/21 Pages) National Semiconductor (TI) – 200V Audio Power Amplifier Driver with Baker Clamp

LME49810
www.ti.com
SNAS391C – MAY 2007 – REVISED APRIL 2013
LME49810 200V Audio Power Amplifier Driver with Baker Clamp
Check for Samples: LME49810
FEATURES
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•2 Very High Voltage Operation
• Output Clamp Logic Output
• Thermal Shutdown and Mute
• Customizable External Compensation
• Scalable Output Power
APPLICATIONS
• Guitar Amplifiers
• Powered Studio Monitors
• Powered Subwoofers
• Pro Audio
• Audio Video Receivers
• High Voltage Industrial Applications
KEY SPECIFICATIONS
• Wide operating voltage range: ±20V to ±100V
• Slew Rate: 50V/μs (Typ)
• Output Drive Current: 60mA (Typ)
• PSRR (f = DC): 110dB (Typ)
• THD+N (f = 1kHz): 0.0007 (Typ)
DESCRIPTION
The LME49810 is a high fidelity audio power amplifier
driver designed for demanding consumer and pro-
audio applications. Amplifier output power may be
scaled by changing the supply voltage and number of
power transistors. The LME49810’s minimum output
current is 50mA. When using a discrete output stage
the LME49810 is capable of delivering in excess of
300 watts into a single-ended 8Ω load.
Unique to the LME49810 is an internal Baker Clamp.
This clamp insures that the amplifier output does not
saturate when over driven. The resultant “soft
clipping” of high level audio signals suppresses
undesirable audio artifacts generated when
conventional solid state amplifiers are driven hard into
clipping.
The LME49810 includes thermal shutdown circuitry
that activates when the die temperature exceeds
150°C. The LME49810’s mute function, when
activated, mutes the input drive signal and forces the
amplifier output to a quiescent state.
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright © 2007–2013, Texas Instruments Incorporated