LM4881

LM4881 Dual 200 mW Headphone Amplifier with Shutdown Mode September 1997 LM4881 Dual 200 mW Headphone Amplifier with Shutdown Mode General Description The LM4881 is a dual audio power amplifier capable of delivering 200 mW of continuous average power into an 8Ω load with 0.1% (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 using surface mount packaging. Since the LM4881 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4881 features an externally controlled, low power consumption shutdown mode which is virtually clickless and popless, as well as an internal thermal shutdown protection mechanism. The unity-gain stable LM4881 can be configured by external gain-setting resistors. Key Specifications n THD at 1 kHz at 125 mW continuous average output power into 8Ω n THD at 1 kHz at 75 mW continuous average output power into 32Ω n Output power at 10% THD+N at 1 kHz into 8Ω n Shutdown Current 0.1% (max) 0.02% (typ) 300 mW (typ) 0.7 µA (typ) Features n n n n n MSOP surface mount packaging Unity-gain stable External gain configuration capability Thermal shutdown protection circuitry No bootstrap capacitors, or snubber circuits are necessary Applications n Headphone Amplifier n Personal Computers n Microphone Preamplifier Typical Application Connection Diagrams MSOP Package DS100005-2 SOP ...