Part # LM4893 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4893 Boomer ® Audio Power Amplifier Series 1.1 Watt Audio Power Amplifier


Part Details:

LM4893 August 2004 1.1 LM4893 W 1.1 Watt Audio Power Amplifier att General Description Key Specifications Audio The LM4893 is an audio power amplifier primarily designed j Improved PSRR at 5V, 3V, & 217Hz 62dB (typ) for demanding applications in mobile phones and other por-table communication device applications. It is capable of j Higher Power Output at 5V & 1% THD 1.1W (typ) delivering 1.1 watt of continuous average power to an 8 j Higher Power Output at 3V & 1% THD 350mW (typ) BTL load with less than 1% distortion (THD+N) from a 5V Power DC j Shutdown Current 0.1µA (typ) power supply. Boomer audio power amplifiers were designed specifically toprovide high quality output power with a minimal amount of Features external components. The LM4893 does not require output n No output coupling capacitors, snubber networks or Amplifier coupling capacitors or bootstrap capacitors, and therefore is bootstrap capacitors required ideally suited for lower-power portable applications where n Unity gain stable minimal space and power consumption are primary require- n Ultra low current shutdown mode ments. n Instantaneous turn-on time The LM4893 features a low-power consumption global shut- n BTL output can drive capacitive loads up to 100pF down mode, which is achieved by driving the shutdown pin n Advanced pop & click circuitry eliminates noises during with logic low. Additionally, the LM4893 features an internal turn-on and turn-off transitions thermal shutdown protection mechanism. n 2.2V - 5.5V operation The LM4893 contains advanced pop & click circuitry which n Available in space-saving µSMD, SO, and MSOP eliminates noises which would otherwise occur during packages turn-on and turn-off transitions. The LM4893 is unity-gain stable and can be configured by Applications external gain-setting resistors. n Mobile Phones


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LM4893.pdf Datasheet