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LM4874

National Semiconductor
Part Number LM4874
Manufacturer National Semiconductor
Description BTL Output Stereo Audio Amplifier
Published Mar 22, 2005
Detailed Description LM4874 Boomer 2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown August 2002 ...
Datasheet PDF File LM4874 PDF File

LM4874
LM4874

Overview
LM4874 Boomer 2.
1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown August 2002 LM4874 2.
1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown General Description The LM4874 features differential stereo inputs, BTL (bridgetied load) outputs, and four externally selectable fixed gains.
Operating on a single 5V supply, the LM4874 delivers 1.
2W, 1.
9W, or 2.
1W (typ) of output power to an 8Ω, 4Ω, or 3Ω BTL load (Note 1), respectively, with less than 1% THD+N.
The LM4874’s gain is selected using two digital inputs.
The nominal gain values are 6dB, 10dB, 15.
6dB, and 21.
6dB.
The LM4874 is designed for notebook and other handheld portable applications.
It delivers high quality output power from a surface-mount package and requires few external components.
Other features include an active-low micropower shutdown mode input and thermal shutdown protection.
j BTL output power RL = 8Ω, VDD = 5.
0V, and THD+N = 1% j Microp...


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