Part # LM4901 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4901 Boomer ® Audio Power Amplifier Series 1.6 Watt Audio Power Amplifier with Selectable Shutdown Logic Level

Part Details:

LM4901 July 2006 1.6 LM4901 W 1.6 Watt Audio Power Amplifier with Selectable att Shutdown Logic Level Audio General Description Key Specifications The LM4901 is an audio power amplifier primarily designed j Improved PSRR at 217Hz & 1KHz 62dB for demanding applications in mobile phones and other por-table communication device applications. It is capable of j Power Output at 5.0V, 1% THD, 4 1.6W (typ) Power delivering 1 watt of continuous average power to an 8 BTL j Power Output at 5.0V, 1% THD, 8 1.07W (typ) load and 1.6 watts of continuous avearge power to a 4 BTL j Power Output at 3.0V, 1% THD, 4 525mW (typ) load with less than 1% distortion (THD+N) from a 5VDC j Power Output at 3.0V, 1% THD, 8 390mW (typ) power supply. j Shutdown Current 0.1µA (typ) Amplifier Boomer audio power amplifiers were designed specifically toprovide high quality output power with a minimal amount ofexternal components. The LM4901 does not require output Features coupling capacitors or bootstrap capacitors, and therefore isideally suited for mobile phone and other low voltage appli- n Available in space-saving packages: LLP and MSOP cations where minimal power consumption is a primary re- n Ultra low current shutdown mode quirement. n BTL output can drive capacitive loads with The LM4901 features a low-power consumption shutdown n Improved pop & click circuitry eliminates noise during mode. To facilitate this, Shutdown may be enabled by either turn-on and turn-off transitions logic high or low depending on mode selection. Driving the n 2.0 - 5.5V operation Selectable shutdown mode pin either high or low enables the shutdown n No output coupling capacitors, snubber networks or pin to be driven in a likewise manner to enable shutdown. bootstrap capacitors required The LM4901 contains advanced pop & click circuitry which n Unity-gain stable eliminates noise which would otherwise occur during turn-on n External gain configuration capability

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LM4901.pdf Datasheet