LPA4890-Class AB Amplifiers

产品型号 输入电压(V) 类型 输出功率(W) 输出通道 PSRR(dB) 增益控制 短路保护 关断电流(uA) 封装 规格书
LPA4890 2.5-5.5 Class AB 1.25W,5V@8Ω,1% 1 -70 X X 1 MSOP-8

1.2-Walts Mono Filter-free Audio Power Amplifier

General Description

The LPA4890 is an audio power amplifier designed for portable communication device applications such as mobile phone applications. The LPA4890 is capable of delivering 1.2W of continuous average power to an 8Ω load and with less than 1% distortion (THD+N) from a 5.2V power supply, and 350mW to a 8Ω load from a 3V power supply. The LPA4890 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 LPA4890 contains circuitry to prevent from “pop and click” noise that would otherwise occur during turn-on and turn-off transitions. For maximum flexibility, the LPA4890 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor). The LPA4890 is available in a MSOP8 package.


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



 2.5-5.5V Operation Voltage
 63dB 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 0.4V Compatible Thresholds
 BTL output can drive capacitive loads
 RoHS compliant and 100%  lead(Pb)-free


Marking Information

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