微处理器

电源与外围

汽车电子

物联网（IoT）解决方案

汽车电子解决方案

功率放大器（英文名称：power amplifier），简称“功放”，是指在给定失真率条件下，能产生最大功率输出以驱动某一负载（例如扬声器）的放大器。功率放大器在整个音响系统中起到了“组织、协调”的枢纽作用，在某种程度上主宰着整个系统能否提供良好的音质输出。

利用三极管的电流控制作用或场效应管的电压控制作用将电源的功率转换为按照输入信号变化的电流。因为声音是不同振幅和不同频率的波，即交流信号电流，三极管的集电极电流永远是基极电流的β倍，β是三极管的交流放大倍数，应用这一点，若将小信号注入基极，则集电极流过的电流会等于基极电流的β倍，然后将这个信号用隔直电容隔离出来，就得到了电流（或电压）是原先的β倍的大信号，这现象成为三极管的放大作用。经过不断的电流放大，就完成了功率放大。

选型表下载

Class-AB Audio Power Amplifier with or without Headphone Driver
Class-D Audio Power Amplifier

Part No.No. of ChannelPower (W)THD+NPSRR (dB)VDD (V)IDD (mA)Package
(Size in mm)		Key FeatureStatus
IS31AP4066D210.10%- 602.7 ~ 5.54QFN-16 (3.0x3.0)Dual 1.3W Stereo Audio Power AmplifierProd
IS31AP4088A2+2 HP30.06%- 802.7 ~ 5.56QFN-16 (4.0x4.0)Dual 2.84WStereo Audio Power Amplifier with Headphone DriverProd
IS31AP4088D230.10%- 602.7 ~ 5.55QFN-16 (4.0x4.0)Dual 2.6W Stereo Audio Power AmplifierProd
IS31AP48332+2HP30.022%- 673.0 ~ 5.56QFN-36(4x4) TQFP48(9x9)Stereo audio PAwith headphone driver,with Multi input & I2C control for 3D,Tone,VolumeProd
IS31AP4990D110.23%- 612.7 ~ 5.54UTQFN-9L (1.5x1.5)1.2W Mono Audio Power Amplifier in UTQFN Package
Prod
IS31AP4991110.03%-652.7~5.55MSOP-8,SOP-81.2W Mono Audio Power Amplifier with active-low standbymodeProd
IS31AP4991A110.074%-682.7~5.53MSOP-8(3.0x5.0)
SOP-8(5.0x6.0)		1.2W Mono AudioPower Amplifier with active-low standbymodeProd
IS31AP4996110.074%-682.7 ~ 5.53MSOP-8 SOP-8Ultra-low power,low distortion Amplifier with BTL outputProd
Part No.No. of ChannelPower (W)THD+NPSRR (dB)VDD (V)IDD (mA)Package
(Size in mm)		Key FeatureStatus
IS31AP200512.950.20%-652.5 ~ 5.52.6DFN-8(3x3) MSOP-82.95W Mono Filter-less Class-D Audio Power AmplifierProd
IS31AP2006130.28%-552.7 ~ 5.52.6DFN-8(3x3)3W Mono Filter-less Class-D Audio Power AmplifierProd
IS31AP2010B130.22%-752.7 ~ 5.52.6UTQFN-9 (1.5x1.5)3W Mono Filter-less Class-DAudio Power AmplifierProd
IS31AP21102Mono 40/ Dual 200.20%-628 ~ 2620eTSSOP-28Differential input,power limit, dynamic temperature control, four selectable gain settingsProd
IS31AP211222x20 BTL,40 PBTL0.20%-604 ~ 2620eTSSOP-28 (9.8x6.5)2x20W stero audio amp with adjustable power limit. Output DC detect, spread spectrum, short circuit detectionSample
IS31AP2145A12.90.20%-722.7 ~ 5.52.0UTQFN-9 (1.5x1.5)2.9W Mono Clip-less & Filter-less Audio Amplifier with Built-in AGCProd
IS31AP2145E12.70.20%-672.7 ~ 5.52.0UTQFN-9 (1.5x1.5)2.7W Mono Clip-less & Filter-less Audio Amplifier with Built in AGCProd

Headphone Driver

Part No.No.of ChannelPower(mW)THD+NPSRR(dB)VDD(V)IDD(mA)Package
(Size in mm)		Key FeatureStatus
IS31AP49122300.024%-952.7 ~ 5.55.0UTQFN-12 (2.0x2.0)High Quality Stereo Headphone Driver withHigh SNR and 7uV Ultra-Low O/P NoiseProd
IS31AP49132300.05%-922.7 ~ 5.55.0QFN-20 (3.0x3.0)3D Surround & Bass Enhanced High Quality Ste- reo Headphone DriverProd

Class-G Speaker Amplifier

Part No.No.of ChannelPower (W)THD+NSNR(dB)VDD(V)IDD(mA)Package
(Size in mm)		Key FeatureStatus
IS31AP4915A120VP-P0.01%1002.5~5.56QFN-16 (4.0x4.0)20VP-P Charge Pump Ceramic Speaker DriverProd

Class-K Speaker Amplifier

Part No.No. of ChannelPower(W)THD+NPSSR(dB)VDD(V)IDD(mA)Package
(Size in mm)		Key FeatureStatus
IS31AP203112W (8Ω Spkr)0.33%-2.7~ 4.55QFN-20 (3.0x3.0)High Power, Ultra-Low EMI Class-K Amplifier with AGCProd
IS31AP203612W (8Ω Spkr)0.05%-72dB3.0 ~ 5.010FCQFN-16AdvancedK-charge pump to boost supply volt- age with a 92% efficiency and increased ampli- fier efficiency of 75%Prod
IS31AP2036A12W (8Ω Spkr)0.05%-64dB3.0~ 5.010FCQFN-16Advanced K-charge pump to boost supply volt- age with a 92% efficiency and increased ampli- fier efficiency of 75%Prod

Digital (I2S) Amplifier

Part No.No.of ChannelPower (W)THD+NPSSR (dB)VDD (V)Package
(Size in mm)		Key FeatureStatus
IS31AP2111220BTL,40 PBTL0.26%-687 ~ 26eTSSOP-242x20W stereo I2S audio amp with 20 bands EQProd
IS31AP2121220Wx2,10Wx2+20W0.20%-7610~26eLQFP-482x25W stereo I2S audio amp with 20 bands EQ, DRC and 2.1ChProd
数据手册
  • 点击选型表型号，下载数据手册
更多更新资料，请访问原厂网站 >

版权所有©2018 广州立功科技股份有限公司粤ICP备09051749号