72W per channel into 2Ω — what that means for your speaker line-up
The TDA7802SMTR delivers 72W x 4 channels into a 2Ω load. That's enough to drive four mid-bass woofers or a full-range speaker set in an automotive head unit or external amp module. The quad-channel output maps directly to a 4-speaker cabin configuration — front left, front right, rear left, rear right — without external bridging. At 2Ω per channel, the amplifier is pulling significant current; verify your power supply rail and ground return can support the peak draw, and plan for a heatsink on the Flexiwatt tab to keep the junction within limits during sustained output.
AEC-Q100 automotive qualification — capable is not qualified
This part carries the Automotive, AEC-Q100 series designation. That means it has passed the AEC-Q100 stress tests for temperature, humidity, and operating life — the same qualification the OEM auditor will ask for at PPAP submission. The 27-Flexiwatt package with formed leads is a surface-mount variant designed for automated assembly on automotive-grade PCBs. If your BOM calls for a Class D amplifier in a vehicle cabin or infotainment system, the AEC-Q100 mark is the hard gate; this part clears it.
Active lifecycle — no LTB watch needed
The TDA7802SMTR is listed as Active in production status, with ROHS3 compliance. No last-time-buy or end-of-life notice is published.
Package and mounting — 27-Flexiwatt SMD
The 27-Flexiwatt (formed leads) package is a surface-mount power package. It has a large metal tab on the underside for thermal dissipation; the tab is typically connected to the negative supply rail or ground plane. Solder paste stencil design should account for the tab's area to avoid voids. The formed leads give some compliance for thermal cycling, but the board layout needs a copper pour under the tab to spread heat. This is not a QFN or BGA; it's a through-hole-like footprint adapted for SMD reflow.
Thermal protection built in
The on-die thermal protection shuts down the amplifier if the junction temperature exceeds the safe limit. In a car door module or under-seat amp, that's a safeguard against a blocked vent or a speaker load that dips below 2Ω on a cold start. It auto-recovers when the temperature drops, which keeps the audio system from latching into silence on a hot day.