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請教:如何提高手機充電器的效率

請教:如何提高手機充電器的效率
我做過一個充電器,這4.2V500mA的,可效率指有35%這樣,次級Diode temperature about 110.
誰能告訴我,問題可能出現在哪?
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jacki_wang
LV.11
2
2003-09-19 22:54
用什么線路, 輸出用什么diode?
有你這樣問的嗎, 沒頭沒腦的,神仙也不會分析.
0
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cxzcjz
LV.2
3
2003-09-20 12:49
有問題
電路及器件選擇肯定有問題
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sunnile
LV.5
4
2003-09-20 22:12
@jacki_wang
用什么線路,輸出用什么diode?有你這樣問的嗎,沒頭沒腦的,神仙也不會分析.
零件
用的是Viper12的IC,secondary diode is SB260.I think,is all caused by leak inductor?
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jacki_wang
LV.11
5
2003-09-20 22:59
@sunnile
零件用的是Viper12的IC,secondarydiodeisSB260.Ithink,isallcausedbyleakinductor?
The leakage inductance should be a problem.
But I don't think it is the all, if you do not care, upload the schematic for reference.what is the input voltage? universal?
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sunnile
LV.5
6
2003-09-21 00:16
@jacki_wang
Theleakageinductanceshouldbeaproblem.ButIdon'tthinkitistheall,ifyoudonotcare,uploadtheschematicforreference.whatistheinputvoltage?universal?
For efficience
input voltage is universal,90-264VAc.I have designed other type of mobile phone charger which is based on Viper 12 else before,but the efficience reach to about 55%.I think the efficience is so low now.The major difference betwwen before and now is the transformer manufacture process.For wiring,i took the sandwich process before,but in this incidence i take the order process.Except it,i could not think out what is the reason.Could you help me?Appreciated.
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jacki_wang
LV.11
7
2003-09-21 00:26
@sunnile
Forefficienceinputvoltageisuniversal,90-264VAc.IhavedesignedothertypeofmobilephonechargerwhichisbasedonViper12elsebefore,buttheefficiencereachtoabout55%.Ithinktheefficienceissolownow.Themajordifferencebetwwenbeforeandnowisthetransformermanufactureprocess.Forwiring,itookthesandwichprocessbefore,butinthisincidenceitaketheorderprocess.Exceptit,icouldnotthinkoutwhatisthereason.Couldyouhelpme?Appreciated.
I had not  idea on using the viper 12
I don't have the datasheet of this guy, but the leakage inductance should ahve effect on the efficiency, if you only have the X'FMR deference on this two project,sure the sandwich can reduce much leakage inductance,why not try on the breadboard? you can find out the result very easy.
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sunnile
LV.5
8
2003-09-21 00:51
@jacki_wang
Ihadnot  ideaonusingtheviper12Idon'thavethedatasheetofthisguy,buttheleakageinductanceshouldahveeffectontheefficiency,ifyouonlyhavetheX'FMRdeferenceonthistwoproject,surethesandwichcanreducemuchleakageinductance,whynottryonthebreadboard?youcanfindouttheresultveryeasy.
regret
now i have not some necessary material.i want to get some sugestion in theory.Have you met such probelem?and what measure did you take?appreciated.
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sunnile
LV.5
9
2003-09-21 01:04
@cxzcjz
有問題電路及器件選擇肯定有問題
器件問題
這種小功率的,如果從器件著手的話,對成本會有影響呀
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franc_y
LV.5
10
2003-09-21 14:09
不會吧
我正在做一個這個指標的手充,沒那么差啊
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jacki_wang
LV.11
11
2003-09-21 23:17
@sunnile
regretnowihavenotsomenecessarymaterial.iwanttogetsomesugestionintheory.Haveyoumetsuchprobelem?andwhatmeasuredidyoutake?appreciated.
I'm sorry Sigama, I'm sorry that I had never been troubled by such a problem.
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13686445390
LV.4
12
2005-06-22 22:54
@franc_y
不會吧我正在做一個這個指標的手充,沒那么差啊
看看你的變壓器感量,是不是太小了,那樣的話工作頻率太高,你的損耗越高,反而效率會低!
www.dykf.com充電器版塊!
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葉孤城
LV.4
13
2005-06-23 16:37
@sunnile
零件用的是Viper12的IC,secondarydiodeisSB260.Ithink,isallcausedbyleakinductor?
你們什么公司.
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fujiang
LV.5
14
2005-06-23 20:17
我就是用的VIPer12A做的4.2V1A都有百分之七十呢
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黑的眼
LV.9
15
2005-06-24 08:38
@sunnile
regretnowihavenotsomenecessarymaterial.iwanttogetsomesugestionintheory.Haveyoumetsuchprobelem?andwhatmeasuredidyoutake?appreciated.
如果你的元件沒問題的話基本上可以肯定是變壓器的問題或者是它的設計
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黑的眼
LV.9
16
2005-06-24 08:49
@fujiang
我就是用的VIPer12A做的4.2V1A都有百分之七十呢
如果元件沒有問題的話基本上可以說是變壓器引起的或者是它的設計
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jwtadvd
LV.2
17
2005-06-24 12:14
@jacki_wang
Theleakageinductanceshouldbeaproblem.ButIdon'tthinkitistheall,ifyoudonotcare,uploadtheschematicforreference.whatistheinputvoltage?universal?
你的禿頂我明白,但你說的話我不清楚,不然就用的白話吧
0
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jwtadvd
LV.2
18
2005-06-24 12:16
JACHI-WANG 是個高手,你拖住他沒錯
0
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shuangying
LV.4
19
2010-04-06 08:19
這個應該可以幫到您!

或聯絡:18926539329,肖工。
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