LM4867LQ

Product Summary

The LM4867LQ is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4W load or 2.4W to a 3W load with less than 1.0% THD+N. The LM4867LQ uses advanced, latest generation circuitry to eliminate all traces of clicks and pops when the supply voltage is first applied. The amplifier has a headphone-amplifier-select input pin. It is used to switch the amplifiers from bridge to single-ended mode for driving headphones. A new circuit topology eliminates headphone output coupling capacitors. A MUX control pin allows selection between the two sets of stereo input signals. The MUX control can also be used to select between two different customer-specified closed-loop responses. The LM4867LQ is designed specifically to provide high quality output power from a surface mount package and require few external components. To simplify audio system design, the LM4867LQ combines dual bridge speaker amplifiers and stereo headphone amplifiers in one package. The LM4867LQ features an externally controlled power-saving micropower shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection.

Parametrics

LM4867LQ absolute maximum ratings: (1)Supply Voltage: 6.0V; (2)Storage Temperature: -65℃ to +150℃; (3)Input Voltage: -0.3V to VDD +0.3V; (4)Power Dissipation: Internally limited; (5)ESD Susceptibility: All pins except Pin 3 (MT, MTE), Pin 2 (LQ) 2000V, Pin 3 (MT, MTE), Pin 2 (LQ) 8000V; (6)ESD Susceptibility: 200V; (7)Junction Temperature: 150℃; (8)Solder Information Small Outline Package: Vapor Phase (60 sec.) 215℃, Infrared (15 sec.) 220℃.

Features

LM4867LQ features: (1)Advanced “click and pop” suppression circuitry; (2)Eliminates headphone amplifier output coupling capacitors; (3)Stereo headphone amplifier mode; (4)Input mux control and two separate inputs per channel; (5)Thermal shutdown protection circuitry; (6)LLP, TSSOP, and exposed-DAP TSSOP packaging available.

Diagrams