What it is and where it fits
The Texas Instruments LM4808MX/NOPB is a Class AB stereo headphone amplifier from the Boomer® series, delivering 150 mW per channel into a 16 Ohm load. The 8-SOIC package means a standard footprint, easy to hand-solder or rework in the field — no hot-air station required for a swap.
ROHS3 compliant, so it meets the latest environmental directives without exemption.
Key ratings for the BOM
150 mW x 2 into 16 Ohm is enough to drive most consumer and pro-audio headphones to a comfortable listening level — the actual output depends on headphone sensitivity, but the power budget covers typical 32-Ohm cans as well. Class AB topology gives a solid compromise between the efficiency of Class B and the linearity of Class A — crossover distortion is low enough for line-level audio without a heatsink in portable gear. The Depop feature suppresses power-up transients that would otherwise cause an audible pop in the headphones — a practical concern if the amp gets turned on and off in a battery-powered device.