■ General Description
The LN4890 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 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 LN4890 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 packages
Ultra low current shutdown mode
BTL output can drive capacitive loads
Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
2.2 - 5.0V operation
No output coupling capacitors, snubber networks or bootstrap capacitors required
Thermal shutdown protection
Unity-gain stable
External gain configuration capability

■ Applications
Mobile Phones
PDAs
Portable electronic devices

■ Package
MSOP-8
SOP-8