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LM4961 - Ceramic Speaker Driver

Description

The LM4961 is an audio power amplifier primarily designed for driving Ceramic Speaker for applications in Cell Phone and PDAs.

It integrates a boost converter, with variable output voltage, with an audio power amplifier.

Features

  • a low-power consumption shutdown mode. Additionally, the LM4961 features an internal thermal shutdown protection mechanism. The LM4961 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4961 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications n Quiescent Power Supply Current n Voltage Swing in BTL at 1% THD n Shutdown current 7mA (typ) 15Vp-p (typ) 0.1µA (typ) Fe.

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Full PDF Text Transcription

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LM4961 Ceramic Speaker Driver October 2004 LM4961 Ceramic Speaker Driver General Description The LM4961 is an audio power amplifier primarily designed for driving Ceramic Speaker for applications in Cell Phone and PDAs. It integrates a boost converter, with variable output voltage, with an audio power amplifier. It is capable of driving 15Vp-p in BTL mode to 2uF+ 30 ohms load, continuous average power, with less than 1% distortion (THD+N) from a 3.2VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal number of external components.
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