LM4888

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

Supply Voltage ..................6.0V
Storage Temperature .......−65°C to +150°C
Input Voltage ............−0.3V to V_DD^+0.3V

Power Dissipation (Note 4) ......Internally limited
ESD Susceptibility (Note 5)............2000V
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
Thermal Resistance
_JC (typ)-SQA24B................ 3°C/W
_JA (typ)-SQA24B................42°C/W

The LM4888 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4 load (Note 1) or 2.4W to a 3 load (Note 2) with less than 1.0% THD+N.

A user selectable "National 3D Enhancement" mode provides enhanced stereo imaging.

The LM4888SQ also has two separate HP (headphone) enable inputs, each having different logic level thresholds. Either HP enable input activates the single ended headphone mode and disables the BTL output mode. The HP Sense input is for use with a normal stereo headphone jack. The remaining input, HP Logic, accepts standard logic level thresholds.

Boomer audio power amplifiers were designed specifically to provide high quality output power from a surface mount package while requiring few external components. To simplify audio system design, the LM4888SQ combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip.

The LM4888SQ features a low-power consumption shutdown mode and thermal shutdown protection. It also utilizes circuitry to reduce "clicks and pops" during device turn-on.

Note 1: An LM4888SQ that has been properly mounted to a circuit board will deliver 2.1W into 4. See the Application Information sections for further information concerning the LM4888SQ.

Note 2: An LM4888SQ that has been properly mounted to a circuit board and forced-air cooled will deliver 2.4W into 3.