LM49450SQ/NOPB

LM49450SQ/NOPB is a Texas Instruments two-channel audio power amplifier designed for portable consumer electronics. The “NOPB” suffix means Pb-free, and “SQ” indicates the package type. It provides two amplified audio outputs from a single supply to drive small speakers or headphones with relatively few external components. The device includes protection features such as thermal shutdown, current limiting, and undervoltage protection to help safeguard the IC and the load. It is suitable for mobile devices (phones, tablets, notebooks, etc.) where compact size and efficiency matter. For exact electrical specs (supply range, output power per channel, THD, quiescent current) and recommended external components, consult the LM49450 datasheet on TI’s website.

Here are the typical features of the LM49450SQ/NOPB:
- 2-channel stereo audio power amplifier (Class-AB) with Bridge-Tied Load (BTL) outputs
- No output coupling capacitors required (BTL mode)
- Wide low-voltage operation (suitable for battery-powered devices)
- Shutdown/Mute control for low idle current and pop-free operation on power-up/down
- Soft-start to minimize pops and clicks
- Internal protection: thermal shutdown, output short-circuit protection, and current limiting
- Pb-free package option (NOPB) in a compact SQ package
- Designed for portable applications with efficient, compact power delivery

LM49450SQ/NOPB comes in a 28-pin package (SQ, Pb-free). It is a stereo (two-channel) audio power amplifier (Class-AB) with differential inputs and outputs, plus built-in protections. It includes a shutdown/mute control (SHDN) and a bypass/reference pin (BYP) among other typical power-amp pins (VDD/VSS/GND, OUTL/OUTR, INL/INR, etc.).

The LM49450SQ/NOPB is manufactured by Texas Instruments (TI). TI is a multinational semiconductor company headquartered in Dallas, Texas, that designs, manufactures and sells analog and mixed-signal integrated circuits and embedded processors used for power management, signal conditioning, interface, and other functions across industrial, automotive, consumer and communications markets. (The "LM" part prefix historically originates from National Semiconductor, which TI acquired.)

LM49450SQ/NOPB is a filterless (no external output filter) Class-D audio amplifier. Suitable applications: consumer audio products requiring high efficiency and small BOM—TVs, DVD/Blu-ray players, set-top boxes, soundbars, PC speakers, docking stations, portable Bluetooth speakers, game consoles, and other embedded audio in home/mobile electronics.

LM49450SQ/NOPB is in an 8-pin Small Outline Integrated Circuit package (SOIC), Pb-free (NOPB).