LPA4990数据手册LPSemi中文资料规格书

描述 Description

The LPA4990 is an audio power amplifier designed for portable communication device applications such as mobile phone applications. The LPA4990 is capable of delivering 1.3W of continuous average power to an 8Ω BTL and with less than 1% distortion (THD+N) from a 5.0V power supply, and 350mW to an 8Ω BTL load from a 3V power supply. The LPA4990 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 LPA4990 contains circuitry to prevent “pop and click” noise that would otherwise occur during turn-on and turn-off transitions. For maximum flexibility, the LPA4990 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor). The LPA4990 is available in a 1.5mm × 1.5mm WCSP-9 and MSOP8 package. Order Information

特性 Features

·2.5V-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, snubber 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