1.4W mono into 4Ω — what that means for your speaker load
Rated for 1.4W continuous output into a 4Ω load from a single channel, the MAX9718BEBL delivers enough headroom for a small portable speaker, alert tone generator, or voice prompt circuit — the 1.4W figure is the maximum undistorted power before clipping at the rated THD. The Class AB output stage means linear operation with low crossover distortion, at the cost of lower efficiency than a Class D alternative — expect around 50-60% efficiency at full output, with the rest dissipated as heat in the package.
Supply range 2.7V to 5.5V — battery and rail flexibility
Operating from 2.7V to 5.5V, the amplifier runs directly from a single lithium-ion cell (3.0-4.2V), a 3.3V regulated rail, or a 5V USB supply without needing an additional regulator — the lower bound at 2.7V means it continues to amplify as the battery discharges near its cutoff. The -40°C to +85°C industrial temperature range qualifies the part for outdoor IoT endpoints, automotive cabin modules, and industrial control panels where ambient temperature swings are wide.
9-UCSP package — footprint and board integration
Housed in a 9-bump WFBGA/CSPBGA package (1.52mm x 1.52mm body), the MAX9718BEBL occupies minimal board area — the 0.5mm pitch array requires careful solder-paste stencil design and X-ray inspection post-reflow, but the small footprint frees space for other components in a dense mixed-signal layout.
Sourcing this part
Available to order against your BOM quantity through independent distribution channels — pricing and lead time are confirmed at quote time. The active lifecycle means no last-time-buy pressure; the part can be specified into production without an immediate replacement plan.