LM4902_15 Datasheet, PDF (1/24 Pages) Texas Instruments – Boomer Audio Power Amplifier Series 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode

LM4902
www.ti.com
SNAS150D – DECEMBER 2001 – REVISED APRIL 2013
LM4902 Boomer™ Audio Power Amplifier Series 265mW at 3.3V Supply Audio Power
Amplifier with Shutdown Mode
Check for Samples: LM4902
FEATURES
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•23 VSSOP and WSON 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 LM4902 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 LM4902
does not require output coupling capacitors, bootstrap
capacitors or snubber networks, it is optimally suited
for low-power portable applications.
The LM4902 features an externally controlled, low
power consumption shutdown mode, and thermal
shutdown protection.
The closed loop response of the unity-gain stable
LM4902 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 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