1.5W mono output into 8Ω
The LM4876M/NOPB delivers 1.5W continuous into an 8Ω load from a single channel — enough to drive a small speaker or earpiece in a portable device without an external heat sink, as long as the supply rail stays within the 2V to 5.5V range. Class AB topology keeps crossover distortion low at low signal levels, which matters when the amplifier is running near its noise floor in a battery-powered audio path.
Supply flexibility and thermal guard
Operating from 2V to 5.5V, this part runs directly off a single Li-ion cell or a 3.3V/5V regulated rail — no separate audio supply needed. Built-in shutdown pin lets the microcontroller cut the amplifier bias when the audio path is idle, saving battery draw; thermal protection folds back output current if the die temperature climbs past the threshold.
8-SOIC footprint and board fit
Housed in the standard 8-SOIC package (3.90mm width), the LM4876M/NOPB fits a two-layer PCB layout with the output stage routed on the top copper — the narrow body keeps the board edge free for the speaker connector. Surface-mount assembly with no exposed pad means the thermal path goes through the SOIC leads and the board copper; a short wide trace from pin 5 (VDD) and pin 8 (output) to the ground plane helps spread the 1.5W heat.
Active production and compliance
ROHS3 compliant and free of the six restricted substances plus the four phthalates — the /NOPB suffix confirms lead-free solder finish on the SOIC leads, so it passes into European and California RoHS BOMs without an exemption claim.