描述 Description

General Description
The LM4905 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8? BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4905 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

特性 Features

■ Available in space-saving LLP package
■ Ultra low current shutdown mode
■ BTL output can drive capacitive loads
■ Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions
■ 2.2 - 5.5V operation
■ No output coupling capacitors, snubber networks or bootstrap capacitors required
■ Unity-gain stable
■ External gain configuration capabilityApplications
■ Mobile Phones
■ PDAs
■ Portable electronic devices?