General 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.
●Key Specifications
●PSRR at 217Hz, VDD = 5V (Fig. 1) 62dB(typ.)
●Power Output at 5.0V & 1% THD 1W(typ.)
●Power Output at 3.3V & 1% THD 400mW(typ.)
●Shutdown Current 0.1µA(typ.)
●Features
●Available in space-saving packages: micro SMD, MSOP, SOIC, and LLP
●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
