LM4875

LM4875 www.ti.com SNAS042C – JANUARY 2002 – REVISED MAY 2013 LM4875 750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch Check for Samples: LM4875 FEATURES 1 2 Precision DC Voltage Volume Control Headphone Amplifier Mode “Click and Pop” Suppression Shutdown Control When Volume Control Pin Is Low Thermal Shutdown Protection APPLICATIONS GSM Phones and Accessories, DECT, Office Phones Hand Held Radio Other Portable Audio Devices KEY SPECIFICATIONS PO at 1.0% THD+N Into 8Ω; 750 mW (typ) PO at 10% THD+N Into 8Ω; 1 W (typ) Shutdown Current; 0.7µA(typ) Supply Voltage Range; 2.7V to 5.5 V DESCRIPTION The LM4875 is a mono bridged audio power amplifier with DC voltage volume control. The LM4875 is capable of delivering 750mW 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 accomplished 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 300mV 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 components and operate on low supply voltages. TYPICAL APPLICATION CONNECTION DIAGRAM Small Outline Package (SOIC) Mini Small Outline Package (VSSOP) Top View See Package Number D, DGK...