LM4895

LM4895 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain October 2002 LM4895 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain General Description The LM4895 is a fully differential 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 load with less than 1% distortion (THD+N) from a 5VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4895 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. The LM4895 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown select pin to be driven in a likewise manner to enable Shutdown. Additionally, the LM4895 features an internal thermal shutdown protection mechanism. The LM4895 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4895 has an internally fixed gain of 6dB. Key Specifications j Impro...