Active production — BOM-fit decision
The TAS2505IRGER: ROHS3 compliance is confirmed, so the part clears EU/UKCA material restrictions without exemption paperwork.
2W mono output — what the rating means for the speaker load
The 2W into 4Ω figure is the maximum continuous output power per channel at 10% THD — for a 4Ω speaker in a portable or IoT audio device, this drives a small enclosure to reasonable SPL without an external power stage.
Supply rail and interface — what the 1.5V–1.95V core means for the power tree
The 1.5V to 1.95V supply range is a dedicated core rail — this is not a general-purpose 3.3V or 5V audio amp. The system must provide a regulated 1.8V rail (typical) that can source the peak current during the 2W burst. I²C control handles volume, mute, and shutdown — no analog potentiometers or external gain-setting resistors are needed. The shutdown feature lets the host put the amplifier into a low-power state when audio is idle.
Package and thermal — board integration checklist
24-VFQFN with exposed pad (4x4 mm body per the supplier device package). Surface-mount assembly with a standard lead-free reflow profile; the exposed pad requires a solder paste stencil aperture that covers at least 50% of the pad area for reliable void-free attachment.
Temperature grade and operating environment
The junction temperature will rise above ambient under load, so the thermal pad design must keep Tj below the 125°C absolute maximum.