LM4890
www.ti.com SNAS138L – SEPTEMBER 2001 – REVISED MAY 2013 LM4890 1 Watt Audio Power Amplifier
Check for Samples: LM4890 FEATURES DESCRIPTION The LM4890 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. 1 2 Available in Space-Saving Packages: DSBGA,
VSSOP, SOIC, and WSON
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 -5.5V 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 KEY SPECIFICATIONS PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.) …
