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LM4900

National Semiconductor
Part Number LM4900
Manufacturer National Semiconductor
Description 265mW at 3.3V Supply Audio Power Amplifier
Published Mar 22, 2005
Detailed Description LM4900 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode September 2001 LM4900 265mW at 3.3V Supply Audio ...
Datasheet PDF File LM4900 PDF File

LM4900
LM4900

Overview
LM4900 265mW at 3.
3V Supply Audio Power Amplifier with Shutdown Mode September 2001 LM4900 265mW at 3.
3V Supply Audio Power Amplifier with Shutdown Mode General 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.
Features n MSOP, LLP, and SOP 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 Applications n Cellular phones n PDA’s n Any portable audio application Key Specifications j THD+N at 1kHz for 265mW continuous average output power into 8Ω, VDD = 3.
3V j THD+N at 1kHz for 675mW continuous 1.
0% (max) average output power into 8Ω, VDD = 5V j Shutdown current 1.
0% (max) 0.
1µA (typ) Typical Application DS200064-1 FIGURE 1.
Typical Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2001 National Semiconductor Corporation DS200064 www.
national.
com LM4900 Connection Diagrams MSOP and SOP Package DS200064-2 Top View Order Number LM4900MM, LM4900M See NS Package Number MUA08A, M08A LLP Package DS200064-76 Top View Order Number LM4900LD See NS Package Number LDA08B www.
national.
com 2 LM4900 Absolute Maximum...


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