LM4990 Datasheet PDF - National

General Description

●The LM4990 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8Ω BTL load and 2 watts of continuous average power (LD and MH only) to a 4Ω BTL load with less than 1% distortion (THD+N+N) from a 5VDC power supply.]

●Features

●Available in space-saving packages: LLP, Exposed-DAP TSSOP, MSOP, and ITL

●Ultra low current shutdown mode

●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 capability

●User selectable shutdown High or Low logic Level

●Applications

●Mobile Phones

●PDAs

●Portable electronic devices