Class AB stereo headphone amplifier — 77 mW per channel into 16 Ω
The BH3547F-E2: The BH3547F-: The ROHM BH3547F- is a Class AB stereo headphone amplifier delivering 77 mW per channel into a 16 Ω load, housed in an 8-SOP (8-SOIC, 4.40 mm width) package. Integrated mute and thermal protection reduce external component count and guard against over-temperature faults during continuous playback.
Output power and headphone drive — what 77 mW means
The 77 mW per channel into 16 Ω is the headline rating that determines headphone compatibility. For 32 Ω headphones, output power roughly halves to about 38 mW per channel — still sufficient for most consumer headsets to reach comfortable listening levels without clipping. The 4.5 V to 6.5 V supply range means the amplifier can run from a single 5 V rail with margin for regulation droop, but the -25°C to 75°C temperature grade limits deployment to indoor consumer or commercial equipment; it is not rated for automotive cabin or industrial environments.
The part is ROHS3 compliant.