LM4868

Supply Voltage ......................................................6.0V
Storage Temperature ....................−65°C to +150°C
Input Voltage .................................−0.3V to VDD+0.3V
Power Dissipation (Note 4) ................Internally limited
ESD Susceptibility (Note 5)
All pins except Pin 3 (MT, MTE), Pin 2 (LQ) ..........2000V
Pin 3 (MT, MTE), Pin 2 (LQ) ..................................8000V
ESD Susceptibility (Note 6).................................... 200V
Junction Temperature ........................................150°C
Solder Information
Small Outline Package
Vapor Phase (60 sec.) ........................................215°C
Infrared (15 sec.) ..............................................220°C
See AN-450 "Surface Mounting and their Effects on
Product Reliablilty" for other methods of soldering
surface mount devices.
Thermal Resistance
JC (typ)-MTC20.............................................. 20°C/W
JA (typ)-MTC20 ..............................................80°C/W
JC (typ)-MXA20A............................................. 2°C/W
JA (typ)-MXA20A ..............................41°C/W (Note 7)
JA (typ)-MXA20A.............................. 51°C/W (Note 8)
JA (typ)-MXA20A ..............................90°C/W (Note 9)
JC (typ)-LQA24A ...........................................3.0°C/W
JA (typ)-LQA24A .............................42°C/W (Note 10)

The LM4868 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4 load or 2.4W to a 3 load with less than 1.0% THD+N. The LM4868 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 (patent pending). 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.

Boomer audio power amplifiers are designed specifically to provide high quality output power from a surface mount package and require few external components. To simplify audio system design, the LM4868 combines dual bridge speaker amplifiers and stereo headphone amplifiers in one package.

The LM4868 features an externally controlled power-saving micropower shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection.

Reliability Metrics