10 W per channel into 8 Ω — the load-dependent output ceiling
The TPA3136AD2PWP delivers 10 W per channel into an 8 Ω load from a supply rail within the 4.5 V to 14.4 V range. This is the maximum continuous output power before the onset of clipping; the actual power into a 4 Ω load will be higher but thermally limited by the package and the supply voltage headroom. As a Class D amplifier, the device operates with switching output stages that achieve typical efficiencies above 85 % at full power, reducing the heat sink requirement compared to a linear amplifier of the same output rating.
The 4.5 V to 14.4 V supply range covers a 12 V automotive battery during cranking (down to 4.5 V) and overvoltage events up to 14.4 V, as well as regulated 5 V or 12 V rails in industrial equipment. The -40 °C to 125 °C operating temperature range qualifies the part for under-hood audio, engine-bay warning tones, and outdoor industrial speakers without active cooling. The 28-PowerTSSOP (0.173", 4.40 mm width) package with exposed thermal pad requires a PCB footprint with a thermal via array under the pad to achieve the rated power dissipation. The supplier device package is 28-HTSSOP; the two designations refer to the same mechanical outline.
Integrated protection and depop — reducing external BOM
Short-circuit and thermal protection are integrated on-chip, eliminating the need for external current-sense resistors or thermal switches. The depop feature suppresses the power-up and power-down transients that would otherwise cause an audible pop in the speaker, removing the need for a muting relay or external soft-start circuit. The stereo (2-channel) output architecture drives a pair of speakers directly; a subwoofer channel requires an additional amplifier. The device is a single-chip solution for a 2.0-channel system with no external output filter in many configurations, depending on the speaker cable length and EMI requirements.
Active lifecycle and ROHS3 compliance — no design-in risk
The ROHS3 exemption status covers all ten restricted substances including the four phthalates, meeting EU and global regulatory requirements without a waiver. The part is supplied in Tube packaging. For high-volume pick-and-place, verify the tube quantity against the reel alternative (TPA3136AD2PWPR) if tape-and-reel is preferred for automated assembly.