LM4900M Datasheet, PDF (1/19 Pages) Texas Instruments – LM4900 Boomer Audio Power Amplifier Series 265mW at 3.3V Supply Audio Power Amplifier

OBSOLETE
LM4900
www.ti.com
SNAS121D – APRIL 2001 – REVISED APRIL 2013
LM4900 Boomer® Audio Power Amplifier Series 265mW at 3.3V Supply Audio Power
Amplifier with Shutdown Mode
Check for Samples: LM4900
FEATURES
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•23 MSOP, LLP, and SOP Packaging
• No Output Coupling Capacitors, Bootstrap
Capacitors, or Snubber Circuits are Necessary
• Thermal Shutdown Protection Circuitry
• Unity-gain Stable
• External Gain Configuration Capability
• Latest Generation "Click and Pop"
Suppression Circuitry
APPLICATIONS
• Cellular Phones
• PDA's
• Any Portable Audio Application
KEY SPECIFICATIONS
• THD+N at 1kHz for 265mW Continuous
Average Output Power into 8Ω,
– V_DD = 3.3V: 1.0% (max)
• THD+N at 1kHz for 675mW Continuous
Average Output Power into 8Ω,
– V_DD = 5V: 1.0% (max)
• Shutdown Current: 0.1µA (typ)
DESCRIPTION
The LM4900 is a bridged audio power amplifier
capable of delivering 265mW of continuous average
power into an 8Ω load with 1% THD+N from a 3.3V
power supply.
Boomer^® audio power amplifiers were designed
specifically to provide high quality output power from
a low supply voltage while requiring a minimal
amount of external components. Since the LM4900
does not require output coupling capacitors, bootstrap
capacitors or snubber networks, it is optimally suited
for low-power portable applications.
The LM4900 features an externally controlled, low
power consumption shutdown mode, and thermal
shutdown protection.
The closed loop response of the unity-gain stable
LM4900 can be configured by external gain-setting
resistors.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Boomer is a registered trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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 © 2001–2013, Texas Instruments Incorporated