LM4871

LM4871 1.1W Audio Power Amplifier with Shutdown Mode February 2000 LM4871 1.1W Audio Power Amplifier with Shutdown Mode General Description The LM4871 is a bridge-connected audio power amplifier capable of delivering typically 1.1W of continuous average power to an 8Ω load with 0.5% (THD) from a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4871 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optionally suited for low-power portable systems. The LM4871 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain stable LM4871 can be configured by external gain-setting resistors. Key Specifications n THD at 1 kHz at 1W continuous average output power into 8Ω n Output power at 10% THD+N at 1 kHz into 8Ω n Shutdown Current 0.5% (max) 1.5W (typ) 0.6 µA (typ) Features n No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary n Small Outline or DIP packaging n Unity-gain stable n External gain configuration capability n Pin compatible with LM4861 Applications n Portable Computers n Desktop Computers n Low Voltage Audio Systems Typical Application Connection Diagram Small Outline and DIP Package DS100008-2 Top View Order Number LM4871M or LM4871N See NS Package Number M08A or N08E DS100008-...