LM4995 Datasheet | National Semiconductor

Description The LM4995 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable munication device applications. It is capable of delivering 1.2W of continuous average power to an 8Ω BTL 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 ponents. The LM4995 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 LM4995 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4995 features an internal thermal shutdown protection mechanism. The LM4995 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The LM4995 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications -  PSRR at 3.6V (217Hz & 1k Hz) -   -   Output Power at 5.0V, 1% THD+N, 8Ω Output Power at 3.6V, 1% THD+N, 8Ω 75d B 1.3W (typ) 625m W (typ) 0.01µA (typ) -  Shutdown Current Features - - - - - - - - - Available in space-saving 0.4mm pitch μSMD package Ultra low current shutdown mode BTL output can drive capacitive loads Improved pop & click circuitry eliminates noise during turnon and turn-off transitions 2.4 - 5.5V operation No output coupling capacitors, snubber networks or bootstrap capacitors required Unity-gain stable External gain configuration capability LLP package: 0.5mm pitch, 3 x 3 mm Applications - Mobile Phones - PDAs - Portable electronic devices Boomer® is a registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation .national. Typical Application .. 201599d3 FIGURE 1. Typical Audio...