LM4992 Datasheet | National Semiconductor

Description The LM4992 is a stereo audio power amplifier primarily designed for demanding applications in mobile phones and other portable munication device applications. It is capable of delivering 1 watt, per channel, 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 LM4992 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 LM4992 features independent shutdown control for each channel and a low-power consumption shutdown mode, which is achieved by driving both shutdown pins with logic low. Additionally, the LM4992 features an internal thermal shutdown protection mechanism. The LM4992 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The LM4992 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Improved PSRR at 217Hz & 1KHz j Stereo Output Power at 5.0V, 64d B (1KHz) 1.07W (typ) 420m W (typ) 0.2µA (typ) 1% THD, 8Ω j Stereo Output Power at 3.3V, 1% THD, 8Ω j Shutdown Current, Vdd = 3.3V Features n n n n n n n n Available in space-saving LLP package Ultra low current shutdown mode BTL output can drive capacitive loads Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions 2.2 - 5.5V operation No output coupling capacitors, snubber networks or bootstrap capacitors required Unity-gain stable External gain configuration capability Applications n Mobile Phones n PDAs n Portable electronic devices Connection Diagram SDA14A 200761E6 Top View Order Number LM4992SD See NS Package Number SDA14A Boomer ® is a registered trademark of National...