1.3W mono into 8Ω — speaker load and headphone drive in one BGA
The LM4946TMX/NOPB is a Texas Instruments Boomer® Class AB audio amplifier that delivers 1.3W into an 8Ω speaker from a single mono channel, while also providing a separate stereo headphone output path — a dual-zone architecture that lets a single IC drive both the main speaker and the headphone jack in a portable device.
Active lifecycle — no end-of-life watch for this BOM line
ROHS3 compliant, so it clears EU regulatory gates without an exemption review. Qualifying the alternate now would mean a board-level evaluation against another Boomer® or third-party Class AB amp in a similar BGA footprint.
25-BGA footprint — board-level routing and thermal considerations
Housed in a 25-ball WFBGA measuring 2.01 x 2.01 mm (supplier device package 25-BGA), the part demands a fine-pitch BGA layout — the 0.4 mm or 0.5 mm ball pitch typical of this package class requires at least a 4-layer PCB for fan-out of the inner balls, with via-in-pad or microvia techniques if the design is space-constrained.