描述 Description

General Description
The LM4805 is a boosted audio power amplifier designed for driving 8ohm speakers in portable applications. It delivers at least 1W continuous power to an 8?load from any input voltage between 3V and 4.6V with less than 2% THD+N.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4805 does not require boot strap capacitors, or snubber circuits. Therefore it is ideally suited for portable applications requiring high power and
minimal size.
The LM4805 features a low-power consumption shutdown mode along with an internal thermal shutdown protection mechanism and short circuit protection. The LM4805 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4805 is unity-gain stable and can be configured by external gain-setting resistors.

特性 Features

Pop & click circuitry eliminates noise during turn-on and turn-off transitions
Low, 2μA (max) shutdown current
Low, 14mA (typ) quiescent current
Unity-gain stable
External gain configuration capabilityApplications
Cellphone
PTT (Push To Talk) mobile phones?