LM4861 Datasheet | National Semiconductor

Description The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8Ω load with 1% (THD) using a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems. The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain stable LM4861 can be configured by external gain-setting resistors. Key Specifications n THD at 1 k Hz at 1W continuous average output power into 8Ω n Output power at 10% THD+N at 1 k Hz into 8Ω n Shutdown Current 1.0% (max) 1.5W (typ) 0.6 µA (typ) Features n No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary n Small Outline (SO) packaging n patible with PC power supplies n Thermal shutdown protection circuitry n Unity-gain stable n External Gain Configuration Capability Applications n n n n Personal puters Portable consumer products Self-powered speakers Toys and games Typical Application Connection Diagram Small Outline Package DS011986-2 Top View Order Number LM4861M See NS Package Number M08A DS011986-1 FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS011986 .national. Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Soldering Information Small Outline...