LM4875 Datasheet | National Semiconductor

Description The LM4875 is a mono bridged audio power amplifier with DC voltage volume control. The LM4875 is capable of delivering 750m W of continuous average power into an 8Ω load with less than 1% THD when powered by a 5V power supply. Switching between bridged speaker mode and headphone (single ended) mode is acplished using the headphone sense pin. To conserve power in portable applications, the LM4875’s micropower shutdown mode (IQ = 0.7µA, typ) is activated when less than 300m V is applied to the DC Vol/SD pin. Boomer audio power amplifiers are designed specifically to provide high power audio output while maintaining high fidelity. They require few external ponents and operate on low supply voltages. Applications n GSM phones and accessories, DECT, office phones n Hand held radio n Other portable audio devices Key Specifications j PO at 1.0% THD+N into 8Ω j PO at 10% THD+N into 8Ω j Shutdown current j Supply voltage range 750m W (typ) 1W (typ) 0.7µA(typ) 2.7V to 5.5V Features n n n n n Precision DC voltage volume control Headphone amplifier mode “Click and pop” suppression Shutdown control when volume control pin is low Thermal shutdown protection Typical Application Connection Diagram Small Outline Package (SO) Mini Small Outline Package (MSOP) Top View Order Number LM4875M, LM4875MM See NS Package Number M08A, MUA08A FIGURE 1. Typical Audio Amplifier Application Circuit BOOMER™ is a trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS101042 .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 Vapor Phase (60 sec.) Infrared (15 sec.) 215˚C 220˚C 6.0V - 65˚C...