Part # LM4804 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4804 Boomer ® Audio Power Amplifier Series Low Voltage High Power Audio Power Amplifier


Part Details:

LM4804 June 2005 Low LM4804Low Voltage High Power Audio Power Amplifier Voltage General Description Key Specifications The LM4804 integrates a Boost Converter with an Audio j Quiescent Power Supply Current Power Amplifier to drive voice coil speakers in portable (V = 4.2V, R = 8) 11mA (typ) applications. When powered by a 3V supply, it is capable of DD L High creating 1.8W power dissipation in an 8 bridge-tied-load j BTL Output Power (BTL) with less than 1% THD+N. (R = 8, 2% THD+N, V = 3V) 1.8W (typ) L DD Boomer audio power amplifiers were designed specifically to j Shutdown Current 2µA (max) provide high quality output power with a minimal amount of Power external components. The LM4804 does not require boot-strap capacitors, or snubber circuits. Therefore it is ideally Features suited for portable applications requiring high output voltage n Pop & click circuitry eliminates noise during turn-on and and minimal size. turn-off transitions Audio The LM4804 features a micro-power shutdown mode. Addi- n Low, 2µA (max) shutdown current tionally, the LM4804 features an internal thermal shutdown n Low, 11mA (typ) quiescent current (V = 4.2V, R = DD L protection mechanism. 8) The LM4804 contains advanced pop & click circuitry that n 1.8W mono BTL output, R = 8, V = 3V L DD eliminates output transients which would otherwise occur Power n Short circuit protection


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LM4804.pdf Datasheet