LM48903TLX/NOPB

LM48903TLX/NOPB: Application Fields and Working Principle

The LM48903TLX/NOPB is a dual low-voltage, biphase, Class-D audio amplifier designed with the latest energy-saving architecture. It is released by Texas Instruments and is powered by a 2.5 V to 5.5 V DC voltage source. This device provides a maximum output power of 1.2 W per channel, a high-power efficiency of 89.5%, and a low distortion of 0.003%. Among other features, it is ideal for portable audio device applications, providing a balance between fast performance, high power and low power dissipation.

Applications

The LM48903TLX/NOPB has a wide range of applications due to its small size and high performance. It is primarily used for portable audio devices such as headphones, MP3 and MP4 players, portable speakers and other consumer audio electronics, as well as for driving small and medium-sized speakers. Other potential applications for this amplifier include audio power supply systems, power and signal conditioning, ultrasound, ultrasound positioning systems and low power audio functions.

Working Principle

The LM48903TLX/NOPB is a biphase Class-D amplifier, meaning it operates by driving an output device with a square wave, which consists of two phases of equal pulse density, one in-phase and one out-of-phase. To achieve maximum efficiency and power output, the switching frequencies may be varied according to the load characteristics, as the output stage is fixed and the input is connected to a low-power filter network. This filter network is responsible for all of the linearization processes, allowing the output to produce a clean, low-distortion signal. Additionally, the amplifier utilizes advanced protection features such as thermal shutdown, under-voltage protection and short-circuit protection to ensure safe and reliable operation.

Conclusion

The LM48903TLX/NOPB is a dual low-voltage, biphase, Class-D audio amplifier designed for a wide range of applications such as consumer audio electronics and power and signal conditioning. It offers a maximum output power of 1.2 W, a high-power efficiency of 89.5%, a low distortion of 0.003%, and is powered by a 2.5 V to 5.5 V DC power source. It utilizes advanced protection features and implements the latest energy-saving architecture to ensure safe and reliable operation.