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LM4802B Datasheet Audio Power Amplifier

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: Audio Power Amplifier with Boost Converter to Drive Ceramic Speakers November 2004 LM4802B Audio Power Amplifier with Boost Converter to Drive Ceramic.

General Description

The LM4802B integrates a Boost Converter with an Audio Power Amplifier to drive Ceramic Speakers in portable applications.

When powered by a 3V supply, it is capable of forcing 12Vp-p across a 2µF + 30Ω bridge-tied-load (BTL) with less than 1% THD+N.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents.

Key Features

  • a low-power consumption shutdown mode. Additionally, the LM4802B features an internal thermal shutdown protection mechanism. The LM4802B contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4802B is unity-gain stable. Its gain is set by external resistors. Key Specifications j Quiescent Power Supply Current j BTL Voltage Swing 12mA (typ) (2µF + 30Ω load, 1% THD+N, VDD = 3V) j Shutdown Current 12Vp-p (typ) 2µ.

LM4802B Distributor