LM4872IBP

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LM4872IBP is an audio amplifier integrated circuit primarily used in small audio and personal music applications like MP3s, radios and other portable products. The chip is primarily intended for single channel operation but can also be used for stereo power amps. It is designed to directly drive headphones and speakers, eliminating the need for additional external components. Its low-cost design requires no heat sink and operates in both single and dual supply configuration.

The LM4872IBP integrated circuit is a low-noise, low-distortion, high-efficiency Class-D audio amplifier designed for portable applications towards high-end headphone and speaker design. The device operates from a single 3V to 5.5V power supply and delivers 0.5W to 1W output power into a 16Ω load with a 5V supply. This high efficiency is due to the advanced, low-power Class-D operation with a switching frequency of 1.2MHz. The device’s low-noise performance is achieved by using a low quiescent current and low-length digital feedback loop. This architecture exhibits extremely low output noise as it actively cancels the noise that is generated during the switching transitions of the MOSFETs.

The LM4872IBP integrated circuit is capable of powering loads down to 4Ω and continues to supply a substantial amount of power even at low power supply voltages. Its low-cost external component count, low parts count and compatibility with all available back-end loads further increase its practicality and usability in portable and small audio systems. Additionally, it employs a negative charge pump voltage evolution system that eliminates large stabilizing electrolytic capacitors thus providing better efficiency and low-cost designs as compared to traditional Class-AB designs. This also enables high power supply rejection ratio.

The LM4872IBP audio amplifier integrated circuit is ideal in applications like battery operated speakers, portable audio players, telephones, and other low-cost audio applications requiring 1W of high-efficiency audio output power into 16Ω or higher load impedances. The device’s extreme low-noise performance and very low distortion enables superior audio performance at low power consumption, making it a good choice for space-constrained and cost sensitive applications.

The LM4872IBP amplifies signal typically in two steps. In the first step, the signal coming in from the signal source is amplified by a low-cost, low-noise preamp control stage. This helps to eliminate crosstalk between the signal paths and reduce noise floor. In the second step, the preamplifier signal is then fed to a Class-D amplifier stage for further amplification. The device features a MOSFET output stage for high efficiency and superior dynamic range to ensure high-quality audio performance. The device features an output stage with an integrated current limiting circuit for optimal protection from over-driving the amplifier.

In conclusion, the LM4872IBP is a low-cost, low-noise Class-D audio amplifier integrated circuit that offers high-quality audio performance in portable applications. Tit is well suited for applications such as battery operated speakers, portable audio players and telephones. Its low parts count, low cost and compatibility with all available back-end loads further add to its practicality and usability. The device features a MOSFET output stage for high efficiency and current limiting circuits for optimal protection from over-driving the amplifier.

The specific data is subject to PDF, and the above content is for reference