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LM4702 Datasheet(Fiches technique) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numéro de pièce LM4702
Description  LM4702 Overture Audio Power Amplifier Series Stereo High Fidelity 200 Volt* Driver with Mute
Télécharger  15 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
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LM4702 Overture® Audio Power Amplifier Series
Stereo High Fidelity 200 Volt* Driver with Mute
General Description
The LM4702 is a high fidelity audio power amplifier driver
designed for demanding consumer and pro-audio applica-
tions. Amplifier output power may be scaled by changing the
supply voltage and number of output devices. The LM4702
is capable of delivering in excess of 300 watts per channel
single ended into an 8 ohm load in the presence of 10% high
line headroom and 20% supply regulation.
The LM4702 includes thermal shut down circuitry that acti-
vates when the die temperature exceeds 150˚C. The
LM4702’s mute function, when activated, mutes the input
drive signal and forces the amplifier output to a quiescent
state.
The LM4702 is available in 3 grades that span a wide range
of applications and performance levels. The LM4702C is
targeted at high volume applications. The LM4702B (in de-
velopment) includes a higher voltage rating along with the
tighter specifications. The LM4702A (in development) is the
premium part with the highest voltage rating, fully specified
with limits over voltage and temperature, and is offered in a
military 883 compliant TO-3 package.
* Tentative Max Operating voltage for the LM4702A,
LM4702B (in development)
Key Specifications
j Wide operating voltage range
LM4702A (in development)
±20V to ±85V
LM4702B (in development)
±20V to ±80V
LM4702C
±20V to ±75V
j Equivalent Noise
3µV
j PSRR
110dB (typ)
j THD
0.001%
Features
n
Very high voltage operation
n
Scalable output power
n
Minimum external components
n
External compensation
n
Thermal Shutdown and Mute
Applications
n
AV receivers
n
Audiophile power amps
n
Pro Audio
n
High voltage industrial applications
Typical Application and Connection Diagrams
20158319
FIGURE 1. Typical Audio Amplifier Application Circuit
20158302
Plastic Package — 15 Lead TO-220
(for LM4702; LM4702B, in development)
20158320
Metal Can — 15 Lead TO-3
(for LM4702A, in development)
SPiKeProtection and Overtureare trademarks of National Semiconductor Corporation.
September 2005
© 2005 National Semiconductor Corporation
DS201583
www.national.com




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