LLC计算表格完整版

,,输入电压(PFC输出),,Vpfc=,370,(V),,,,,,,

,,输出电压,,Vo=,63,(V),,,,,,,

,,输出电流,,Io=,4,(A),,,,,,,

,,输出功率,,Po=,252,(W),,,,,,,

第一步：,,保持时间要求,,Th=,0.25,(ms),,,,,,,

,,PFC输出端的电容值,,Cpfc=,150,(uF),,,,,,,

,,预估变压器转换效率,,E=,0.95,,,,,,,,

,,输入功率,,Pin=,265.2631579,(W),,,,,,,

,,输入电压范围中最小输入（Vin-min)和最大输入（Vin-max)电压必须考虑！,,,,,,,,,,,

,,,,Vin-min=,368.8031853,(V),,,,,,,

,,输入最大电压,,Vin-max=,430,(V),,,,,,,

,,"选择K,k值一般取3~7之间，其中K为Lm/Lr,fo和k一旦选择好，最大和最小的开关频率将确定！",,,,,,,,,,,

,,,,K=,5,,,,,,,,

,,,,,,,,,,,,,,

,,确定谐振网络的最大Mmax和最小Mmin增益！,,,,,,,,,,,

第二步：,,最小增益,,Mmin=,0.860465116,,,,,,,,

,,最大增益,,Mmax=,1.003245131,,,,,,,,

,,确定变压器匝比（n=Np/Ns),,,,,,,,,,,

第三步：,,整流管正向压降,,Vf=,0.8,(V),,,,,,,

,,理论匝比,,n=,2.89968652,,,,,,,,

,,实际变压器匝比,,Nreal=,3.176447434,,,,,,,,

,,确定等效负载阻抗Rac和Rout,,,,,,,,,,,

第四步：,,等效负载阻抗,,Rac=,110.0862739,(ohm),,,,,,,

,,输出端阻抗,,Rout=,16.15253968,(ohm),,,,,,,

,,,,,,,,绕线根数以及线经大小的选择,,,,,

,,品质因数相关计算,,Q2=,2.39426453,,,输入电流的有效值,,Ir=,2,(A),

,,,,Q1=,0.309193492,,,输入电流的密度,,A=,7.5,(A/mm^2),

,,选择Q1和Q2之间的值,,Q=,0.41,,,选择将要用单根线经,,d=,0.12,(mm),

,,,,,,,,计算得到总共需要的线数,,Num=,23.57851049,(根）,

第五步：,,自己选择谐振频率,,fo=,100,(kHZ),,,,,,,

,,谐振电容,,Cr=,35.26168893,(nF),,关于主感量和谐振电感产生的最小谐振频率的计算,,,,,

,,谐振电感,,Lr=,71.83517733,(uF),,输入此时的主绕组感量,,L1=,481,(uH),

,,初级感量,,Lp=,359.1758867,(uF),,输入此时的谐振感量,,L2=,70,(uH),

,,,,,,,,谐振电容的值,,C=,33,(nF),

,,,,,,,,,,Fr-min=,37.3428609,(KHZ),

,,,,,,,,,,,,,,

,,设计变压器相关参数,,,,,,,,,,,

,,,,,,,,谐振电容的相关参数计算,,,,,

,,,,,,,,,谐振电容的有效值,,Icr-rms=,1.788179947,(A)

,,最小谐振频率,,fo-min=,40.8455353,(kHZ),,,,,,,

,,最大开关频率,,fsw-max=,229.9068134,(KHZ),,,谐振电容的耐压值,,Vcr-max=,329.1414137,(V)

,,选择最大开关频率,,Fs-max=,165,(kHZ),,,,,,,

,,最小开关频率,,fsw-min=,98.42338385,(KHZ),,,,,,,

,,选择最小开关频率,,fs-min=,65,(KHZ),,,,,,,

,,变压器磁芯面积,,Ae=,150,(mm^2),,核算验证！如果Im<Ip，则从新选择降低Q或增大Lr+Lp,,,,,

,,磁通变化量,,△B=,0.25,(T),,,最大输入电压时的电流,,Im=,1.084846279,(A)

,,此时初级最小匝数,,Np-min=,27.0209795,(Ts),,,,,,,

,,选择次级匝数Ns使得Np>Np-min,,,,,,输入所选MOS管的相关参数值,,,,,

,,对Np-min进行修正后,,Np=,25.41157947,(Ts),,,MOS管的输出电容,,Coss=,160,(pf)

,,对Np-min进行修正后,,Ns=,8,(Ts),,,,,Cstray=,100,(pf)

,,,,,,,,,,,Ip=,0.602,(A)

,,,,,,,,,死区时间的设定(200~400)之间,,Tdead=,300,(ns)

,,L6599相关参数的选择,,,,,根据MOS参数求最大允许值,,,Lm1=,1171.88,(uH),

,,参数选择方法1,,,,,,,,,,,

,,,,,,,,,,,,,,

,,3脚电容的选择,,CF=,330,(pF),,根据公式求,,LM2=,359.36,(uH),

,,最小开关频率设置,,Rfmin=,15.54001554,(kohm),,,,,,,

,,最大开关频率设置,,Rfmax=,10.1010101,(kohm),,,,,,,

,,软启动电容,,Css=,0.69795,(uF),,,,,,,

,,软启动电阻,,Rss=,4.298302171,(Kohm),,,,,,,

,,软启动频率,,Fstart=,135.1048975,(KHZ),,,,,,,

,,选择自己的软启动频率,,fstat=,300,(KHZ),,,,,,,

,,BOOSTMODE下,,RFmax1=,3.787878788,(kohm),,,,,,,

,,,,,,,,,,,,,,

,,参数选择方法2,,,,,,,,,,,

,,,,Ifmin=,0.1287,(mA),,,,,,,

,,,,Ifmax=,0.3267,(mA),,,,,,,

,,,,Irfmax=,0.198,(mA),,,,,,,

,,,,Ifstart=,0.594,(mA),,,,,,,

,,,,Ifrss=,0.4653,(mA),,,,,,,

,,,,,,,,,,,,,,

,,,,Rfmax2=,9.090909091,(KHz),,,,,,,

,,,,Rf