LM4990
www.ti.com LM4990 SNAS184E – DECEMBER 2002 – REVISED MAY 2013 2 Watt Audio Power Amplifier with Selectable
Shutdown Logic Level
Check for Samples: LM4990 FEATURES 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 (NGZ and DGQ
only) to a 4Ω BTL load with less than 1% distortion
(THD+N+N) from a 5VDC power supply. 1 2 Available in Space-Saving Packages: WSON,
Exposed-DAP MSOP-PowerPAD, VSSOP, and
DSBGA
Ultra Low Current Shutdown Mode
Improved Click and Pop 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 …
