LM4918 Datasheet | National Semiconductor

Description The LM4918 is a monolithic integrated circuit that provides a automatic gain control (AGC), and stereo bridged audio power amplifiers capable of producing 1W into 8Ω with less than 1.0% THD. Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external ponents. The LM4918 incorporates a AGC and stereo bridged audio power amplifiers making it optimally suited for multimedia monitors, portable radios, desktop and portable puter applications. The LM4918 features an externally controlled, low-power consumption shutdown mode, and a power amplifier mute for maximum system flexibility and performance. Key Specifications j THD+N at 1k Hz, 1W, 8Ω j Total quiescent power supply current j Total shutdown power supply current 0.3% (typ) 18m A (typ) 1µA (typ) Features n n n n n n 0.75d B per step/32step AGC Control Interface Automatic Gain Control Circuitry Stereo Bridged power amplifiers “Click and pop” suppression circuitry Thermal shutdown protection circuitry Selectable Auto Detect Std-by mode and Logic control Applications n Portable puters n Desktop puters n Multimedia monitors Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200913 .national. Connection Diagrams LQ Package Top View Order Number LM4918LQ See NS Package Number LQA32B LQ Marking 200913H7 Top View NS - Std NS Logo U - Wafer Fab Code Z - Assembly Plant Code XY - 2 Digit Date Code TT - Die Run Traceability L4918LQ - LM4918LQ .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...