General Description
●The LM4889 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 8Ω BTL load with less than 2% 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 LM4889 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.
●Features
●■ Available in space-saving MSOP, SOIC, LLP, and micro SMD packages
●■ Ultra low current shutdown mode (3.3 to 2.6V - 0.01µA)
●■ Can drive capacitive loads up to 500 pF
●■ Improved pop & click circuitry eliminates noises 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 capability
●Applications
●■ Mobile Phones
●■ PDAs
●■ Portable electronic devices
