基于UCC28019的开关电源设计Desig
ofSwitchi
gPowerSupplyBasedo
UCC28019
专
业：电子信息工程
学
号：05128025
姓
名：段
闪
指导老师：胡
晗
f基于UCC28019的开关电源设计
摘要：电气设备的功率因数过低，会加重电网的负载，造成电网容量的浪费。功率因数的优劣是开关电源性能好坏的一个重要评价指标。为了便于研制和生产有源功率因数校正器，现在功率因数校正PFC（PowerFactorCorrectio
）的控制电路已集成化，有多种PFC集成控制电路芯片可供选择。本文采用TI公司生产的功率因数校正芯片UCC28019设计出一种高功率因数、高效率、低谐波的单相整流PFC开关电源。用两片高速串行AD转换器ADS7818对输出电压和电流采样采样数据送单片机STC89C52处理并由液晶显示器SN1602实时显示当前输出电压、电流。系统具有25A过流保护。测试结果表明功率因数大于095，效率达到92，输入电流波形谐波失真小于5。关键词：开关电源；STC89C52；功率因数校正；UCC28019；过流保护
I
fDesig
ofSwitchi
gPowerSupplyBasedo
UCC28019
AbstractThepowerfactoroftheelectricalequipme
tistoolowwhichwilli
creasetheloadofthepowergrida
dresulti
wasti
gofpowergridcapacityTheadva
tageordisadva
tageofthepowerfactorsisa
importa
tevaluatio
i
dicatorforswitchi
gpowersupplyperforma
ceI
ordertodevelopa
dproducetheActivePowerFactorCorrectio
theco
trolcircuitofPFCPowerFactorCorrectio
hasbee
i
tegrated
owsothereareavarietyofi
tegratedPFCco
trolcircuitchipstochoosefromI
thispaperUCC28019PFCchipwhichisproducedbyTICompa
yisusedtodesig
aki
dofSi
glephasePFCrectifierswitchi
gpowersupplywithahighpowerfactorhighefficie
cylowharmo
icWithtwohighspeedserialADco
verterADS7818ofoutputvoltagea
dcurre
tsampli
gsampleprocessi
gdataisse
ttotheSTC89C52si
glechipa
dLCDSN1602realtimedisplaysthecurre
toutputvoltagea
dcurre
tThesystemhas25Aovercurre
tprotectio
Thetestresultsshowthatthepowerfactorismuchgreatertha
095theefficie
cyreachesto92Harmo
icdistortio
ofi
putcurre
twaveformislesstha
5Keywordsswitchi
gpowersupplySTC89C52powerfactorcorrectio
UCC28019overcurre
tprotectio

II
f目
录
1绪论111引言112开关电源的发展历史113开关电源的基本结构r