1MHZ的模块电源

毕业设计要做一款1MHZ的DCDC模块电源,之前只做过100KHZ-200KHZ的模块,对于频率这么高的模块实在有点无从下手,在论坛里找了找资料,发现相关的话题不多,希望做过,有经验的师兄师姐们能给小弟一些建议,譬如变压器的设计,相关控制芯片,开关管的选择等等.
   电压大概指标如下:
       输入9—18V
      输出5V 1.2A
      效率优于 0.8
   谢谢各位不吝赐教!

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shower

LV.8

2007-12-17 16:38

如果是非隔离的话,会比较容易.你是哪个学校的?

sunbin007

LV.1

2007-12-17 19:30

@shower

如果是非隔离的话,会比较容易.你是哪个学校的?

想做一款隔离的电源
我是成电的

wjjzqy

LV.6

2007-12-19 12:17

@sunbin007

想做一款隔离的电源我是成电的

关注

dymg

LV.3

2007-12-20 10:55

应该先论证为什么要1MHz?
难点在何处?
解决方案是什么?
效果?
结论!

tired

LV.6

2007-12-22 17:53

注意磁材频率特性,选用开关管、整流管注意结电容,还要注意器件的ESL等附加参数.高频率开关电源是非常有意义的,不过如果你们老师不是为了搞高精尖,那就是吃饱了撑的.

shower

LV.8

2007-12-25 14:24

@tired

学校老师都是为了写论文,成电的老师我倒是认识几个

dymg

LV.3

2008-01-17 08:05

不隔离的, IC, 1.1MHz已是产品了.
今年要推出3MHz产品.

隔离的不太好搞.

LV.1

2008-01-19 20:14

@dymg

不隔离的,IC,1.1MHz已是产品了.今年要推出3MHz产品.隔离的不太好搞.

隔离的可以考虑LLC,不过设计起来,步线方面要特别小心

great

LV.4

2008-01-20 15:55

怎么来驱动也是一个重点解决的,不然这么高的频率,开关损耗也很大,效率不好做.

temp1234

LV.5

2008-02-13 17:56

Forward: 3F3 EFD10 core,turn ratio 2:1 and 3842(cos type)may work! Please see eraly 1990s IEEE Transations on Applied Power Electronics, Maga-Hzs module designs are hat in that age!

Thanks

tired

LV.6

2008-03-13 23:22

@temp1234

Forward:3F3EFD10core,turnratio2:1and3842(costype)maywork!Pleaseseeeraly1990sIEEETransationsonAppliedPowerElectronics,Maga-Hzsmoduledesignsarehatinthatage!Thanks

3842 zui gao pin lv shi duo shao?
不懂洋文?
那翻译一下吧,3842最高频率是多少?

temp1234

LV.5

2008-03-14 09:55

@tired

3842zuigaopinlvshiduoshao?不懂洋文?那翻译一下吧,3842最高频率是多少?

As I know! CMOS version can run at 1MHz.
FlyBack is more easy to run at 1Mhz, but not easy to reach 80% for 6W output! So Forword may better!
You are a Student, so it's easy to reach IEEE paper, you can serch "resonant converter" then you can got a very long listing! In that age, Maga-Hz driver is very important part for their paper, due to no commicail controller can reach so high frequency! O!O!May you tell my age? Bye!

tired

LV.6

2008-03-16 22:57

@temp1234

AsIknow!CMOSversioncanrunat1MHz.FlyBackismoreeasytorunat1Mhz,butnoteasytoreach80%for6Woutput!SoForwordmaybetter!YouareaStudent,soit'seasytoreachIEEEpaper,youcanserch"resonantconverter"thenyoucangotaverylonglisting!Inthatage,Maga-Hzdriverisveryimportantpartfortheirpaper,duetonocommicailcontrollercanreachsohighfrequency!O!O!Mayyoutellmyage?Bye!

定频的阻容都是有偏差的,使用x843按频率上限设计为1MHz只能做科研,做产品不妥当.

brave888

LV.6

2008-03-19 10:00

@sunbin007

想做一款隔离的电源我是成电的

成电那个学院,做1MHZ的有难度,干扰和芯片都是一些问题.

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