LM4865 Datasheet | National Semiconductor

LM4865 750 m W Audio Power Amplifier with DC Volume Control and Headphone Switch December 1999 LM4865 750 m W Audio Power Amplifier with DC Volume Control and Headphone Switch General Description The LM4865 is a mono bridged audio power amplifier with DC volume control, capable of delivering 750 m W of continuous average power into an 8Ω load with less than 1% THD from a 5V power supply. Switching between bridged speaker mode and headphone (single ended) mode is acplished via a headphone sense pin. In addition, LM4865 is set into low current consumption shutdown mode (0.7 µA typical) by lowering the DC Vol/SD pin to below 0.3V. Boomer audio power amplifiers are designed specifically to provide high power audio output, with quality sound, from a low supply voltage source while requiring the minimal amount of external ponents. n Hand held radio n Other portable audio devices Key Specifications n PO at 1.0% THD+N into 8Ω (SOP): 750 m W (typ) n PO at 10% THD+N into 8Ω (SOP): 1W (typ) n Shutdown Current: 0.7 µA (typ) Features n n n n n DC volume control Headphone amplifier mode “Click and pop” suppression Shutdown control when volume control pin is low Thermal shutdown protection Applications n GSM phones and accessories, DECT, office phones Typical Application Connection Diagram MSOP, SOP Package DS101025-2 Top View Order Number LM4865M, LM4865MM See NS Package Number M08A, MUA08A DS101025-1 FIGURE 1. Typical Audio Amplifier Application Circuit BOOMER™ is a trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS101025 .national....