基于BLF888设计的500W RF广播发射方案

第第页基于BLF888设计的500WRF广播发射方案NXP公司的BLF888是500WLDMOSRF功率晶体管，用于广播发射和工业应用。在UHF频带470MHz到860MHz可提供平均功率110W，峰值包络功率500W，功率增益19dB，漏极效率46%，VDS电压50V，漏极静态电流1.3A。本文主要介绍了BLF888主要特性和优势，AB类共源宽带放大器电路和元件列表以及PCB布局图和元件布局图。

A500WLDMOSRFpowertransistorforbroadcasttransmitterapplicationsandindustrialapplications.Thetransistorisoptimizedfordigitalapplicationsandcandeliver110WaverageDVB-TbroadbandoverthefullUHFbandfrom470MHzto860MHz.Theexcellentruggednessofthisdevicemakesitidealfordigitaltransmitterapplications.

BLF888主要特性和优势：

2-Toneperformanceat860MHz,adrain-sourcevoltageVDSof50VandaquiescentdraincurrentIDq=1.3A:

Peakenvelopepowerloadpower=500W

Powergain=19dB

Drainefficiency=46%

Thirdorderintermodulationdistortion=32dBc

DVBperformanceat858MHz,adrain-sourcevoltageVDSof50VandaquiescentdraincurrentIDq=1.3A:

Averageoutputpower=110W

Powergain=19dB

Drainefficiency=31%

Shoulderdistance=31dBc(4.3MHzfromcenterfrequency)

IntegratedESDprotection

Advancedflangematerialforoptimumthermalbehaviorandreliability

Excellentruggedness

Highpowergain

Highefficiency

Designedforbroadbandoperation(470MHzto860MHz)

Excellentreliability

Internalinputmatchingforhighgainandoptimumbroadbandoperation

Easypowercontrol

ComplianttoDirective2023/95/EC,regardingRestrictionofHazardousSubstances(RoHS)

BLF888应用：

CommunicationtransmitterapplicationsintheUHFband

IndustrialapplicationsintheUHFband