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LM4902

National Semiconductor
Part Number LM4902
Manufacturer National Semiconductor
Description 265mW at 3.3V Supply Audio Power Amplifier
Published Mar 22, 2005
Detailed Description LM4902 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode February 2002 LM4902 265mW at 3.3V Supply Audio P...
Datasheet PDF File LM4902 PDF File

LM4902
LM4902

Overview
LM4902 265mW at 3.
3V Supply Audio Power Amplifier with Shutdown Mode February 2002 LM4902 265mW at 3.
3V Supply Audio Power Amplifier with Shutdown Mode General 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.
j THD+N at 1kHz for 675mW continuous average output power into 8Ω, VDD = 5V j Shutdown current 1.
0% (max) 0.
1µA (typ) Features n MSOP and LLP packaging n No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary n Thermal shutdown protection circuitry n Unity-gain stable n External gain configuration capability n Latest generation ’click and pop’ suppression circuitry Key Specifications j THD+N at 1kHz for 265mW continuous Applications n Cellular phones n PDA’s n Any portable audio application 1.
0% (max) average output power into 8Ω, VDD = 3.
3V Typical Application 20029801 FIGURE 1.
Typical Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2002 National Semiconductor Corporation DS200298 www.
national.
com LM4902 Connection Diagrams MSOP MSOP Marking 20029878 20029802 Top View Order Number LM4902MM See NS Package Number MUA08A LLP Top View G - Boomer Family C3 - LM4902MM LLP Marking 20029877 20029875 Top View Order Number LM4902LD See NS Package Number LDA08B Top View XY ...


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