LPA4871数据手册LPSemi中文资料规格书

描述 Description

The LPA4871 is an audio power amplifier designed for portable communication device applications such as mobile phone applications. The LPA4871 is capable of delivering 2.1W of continuous average power to an 8Ω BTL and with less than 1% distortion (THD+N) from a 5.0V power supply, and 650mW to a 8Ω BTL load from a 3V power supply. The LPA4871 provides high quality audio while requiring few external components and minimal power consumption. It features a low-power shutdown mode, which is achieved by driving the SHUTDOWN pin with logic low. The LPA4871 contains circuitry to prevent from ”pop and click” noise that would otherwise occur during turn-on and turn-off transitions. For maximum flexibility, the LPA4871 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor). The LPA4871 is available in a SOP8 package.

特性 Features

·2.5-5.5V operation
·65dB PSRR at 217Hz, VDD=5V
·0.1μA ultra low current shutdown mode
·Improved pop & click circuitry
·Unique Modulation Scheme Reduces EMI Emissions
·0.1-μA Shutdown Current
·No output coupling capacitors, sunbber networks or
·bootstrap capacitors required
·External gain configuration capability
·Shutdown Pin has 1.8V Compatible Thresholds
·BTL output can drive capacitive loads
·RoHS compliant and 100% lead(Pb)-free

应用 Application

·PMP,PSP, Game, Data-Bank
·Cellular and Smart mobile phone