1MHZ的模塊電源

畢業(yè)設計要做一款1MHZ的DCDC模塊電源,之前只做過100KHZ-200KHZ的模塊,對于頻率這么高的模塊實在有點無從下手,在論壇里找了找資料,發(fā)現(xiàn)相關的話題不多,希望做過,有經(jīng)驗的師兄師姐們能給小弟一些建議,譬如變壓器的設計,相關控制芯片,開關管的選擇等等.
   電壓大概指標如下:
       輸入9—18V
      輸出5V 1.2A
      效率優(yōu)于 0.8
   謝謝各位不吝賜教!

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shower

LV.8

2007-12-17 16:38

如果是非隔離的話,會比較容易.你是哪個學校的?

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sunbin007

LV.1

2007-12-17 19:30

@shower

如果是非隔離的話,會比較容易.你是哪個學校的?

想做一款隔離的電源
我是成電的

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wjjzqy

LV.6

2007-12-19 12:17

@sunbin007

想做一款隔離的電源我是成電的

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dymg

LV.3

2007-12-20 10:55

應該先論證為什么要1MHz?
難點在何處?
解決方案是什么?
效果?
結論!

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tired

LV.6

2007-12-22 17:53

注意磁材頻率特性,選用開關管、整流管注意結電容,還要注意器件的ESL等附加參數(shù).高頻率開關電源是非常有意義的,不過如果你們老師不是為了搞高精尖,那就是吃飽了撐的.

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shower

LV.8

2007-12-25 14:24

@tired

學校老師都是為了寫論文,成電的老師我倒是認識幾個

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dymg

LV.3

2008-01-17 08:05

不隔離的, IC, 1.1MHz已是產(chǎn)品了.
今年要推出3MHz產(chǎn)品.

隔離的不太好搞.

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LV.1

2008-01-19 20:14

@dymg

不隔離的,IC,1.1MHz已是產(chǎn)品了.今年要推出3MHz產(chǎn)品.隔離的不太好搞.

隔離的可以考慮LLC,不過設計起來,步線方面要特別小心

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great

LV.4

2008-01-20 15:55

怎么來驅(qū)動也是一個重點解決的,不然這么高的頻率,開關損耗也很大,效率不好做.

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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

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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?
那翻譯一下吧,3842最高頻率是多少?

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temp1234

LV.5

2008-03-14 09:55

@tired

3842zuigaopinlvshiduoshao?不懂洋文?那翻譯一下吧,3842最高頻率是多少?

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!

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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!

定頻的阻容都是有偏差的,使用x843按頻率上限設計為1MHz只能做科研,做產(chǎn)品不妥當.

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