The STMicroelectronics TDA7491HV13TR is a Class D stereo audio amplifier delivering 20W per channel into 8Ω loads from a 5V to 18V supply. It integrates depop, differential inputs, mute, standby, and short-circuit/thermal protection — a full-featured output stage for active speakers, soundbars, and automotive aftermarket audio where board space and heat dissipation matter.
The date-code and lot traceability are verified against STMicro's factory marking standards before shipment.
Second-source and cross-shop considerations
The closest functional sibling is the TDA7492P13TR, also a Class D stereo amplifier but rated 25W per channel into 8Ω — a 5W/channel increase that may require a larger heatsink or supply headroom. The TDA7491HV13TR's 20W rating is a better fit for designs where the 8Ω load is fixed and the thermal budget is tight. No pin-compatible second-source alternate is listed; the TDA7492P13TR shares the same package outline (PowerSSO-36) but verify the pinout for drop-in replacement.