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LM4906 - 1W/ Bypass-Capacitor-less Audio Amplifier

Description

The LM4906 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications.

It is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a +5V power supply.

Features

  • a low -power consumption shutdown mode (the part is enabled by pulling the SD pin high). Additionally, the LM4906 features an internal thermal shutdown protection mechanism. Key Specifications j Improved PSRR at 217Hz for +3V j Power Output at +5V, THD+N = 1%, 8Ω j Total shutdown power supply current 71dB 1.0W (typ) 0.1µA (typ) j Power Output at +3V, THD+N = 1%, 8Ω 390mW (typ) Features n n n n n n n n Selectable gain of 6dB (2V/V) or 12dB (4V/V) No output or PSRR bypass capacitors required I.

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LM4906 1W, Bypass-Capacitor-less Audio Amplifier with Internal Selectable Gain May 2003 LM4906 1W, Bypass-Capacitor-less Audio Amplifier with Internal Selectable Gain General Description The LM4906 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a +5V power supply. The LM4906 is the first National Semiconductor Boomer Power Amplifier that does not require an external PSRR bypass capacitor. The LM4906 also has an internal selectable gain of either 6dB or 12dB.
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