LM46001PWP – TEXAS INSTRUMENTS

The Texas Instruments LM46001PWP is a single-channel, class-D audio amplifier designed for portable applications demanding high efficiency and low distortion. It operates from a 2.5V to 5.5V supply voltage, exhibiting optimal performance between 3.3V and 5V. The device features a built-in shutdown function, enabling power saving modes and reducing standby current to a mere few microamps. Output power, dependent on supply voltage and load impedance, typically reaches 1W into an 8Ω load at 5V. This is achieved with a THD+N of less than 1% at 1kHz._x000D_
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Packaged in a space-saving 6-pin WSON (WCSP) package, the LM46001PWP minimizes board area. Its internal circuitry incorporates a sophisticated protection scheme including thermal shutdown and short-circuit protection. The amplifier’s high efficiency makes it ideal for battery-powered devices such as portable speakers, headphones, and hearing aids where minimizing power consumption is crucial. Its small size and robust protection features contribute to a reliable and compact design. Designers should note the need for external components, including a bootstrap capacitor and output filter, for optimal performance. The device’s simplicity and high efficiency outweigh the need for external bias circuitry, simplifying implementation.