>2.+5v dynamic load
>電壓低於 4.75
>其實這也是 s 家在賭 上電腦後不會有這樣嚴格的條件
>5V 通常是IC 用電 所以說這種情形發生很少

因為目前+5V與+3.3V越吃越少了，所以各電源都漸漸縮減輸出量。

>3.但 Q301 Q303 Q305 這就非常不合理
>FAIRCHILD FQP18N50V2
>MOSFET DATESHEET (http://www.datasheet4u.com/download.php?>id=228971)
>這個MOSFET 耐壓只有500V

>在線路架構中
>不管是PFC 和PWM 的MOSFET 通常使用電壓為 520~59X V
>用600V MOSET的居多 極少用500V
>除非是 使用電壓是90~132V的
>只用500V 這未免偷太大

最近測的電源PFC與一次開關晶體如下：
CoolerMaster 850：PFC W25NM50 * 2 PWM W20NM50 * 2
CWT 1000：每一個區塊PFC 20N60C3 * 2 PWM 20N60C3 * 2
CWT PSH850系列：PFC W45NM50 * 2 PWM 20N60C3 * 2
CWT PSH800系列：PFC 32N50C3 * 2 PWM 32N50C3 * 2
CWT PSH750系列：PFC 20N60C3 *2 PWM 20N60C3 * 2
CWT PSH650系列：PFC W25NM50 * 2 PWM IRFP460A * 2
CWT PSH500系列：PFC 20N60C3 * 2 PWM 16N50C3 * 2
HIGHPOWER 1000：PFC 21N50C5 * 3 PWM 20N60C3 * 2
七盟1200：PFC 20N60S5 * 4 PWM 35N60C3 * 2
DA650：PFC 20N60C3 *2 PWM 16N50C3 * 2
ENP-5150GH系列：PFC AV2 18N50 * 2 PWM W14NK50Z * 2
HEC 750：PFC W20NM60 * 2 PWM W20NM60 * 2

APFC目前多採用Boost升壓電路，升壓至380V，所以使用的功率元件耐壓需大於此值，一般常選用Vgs為500~600V的元件。
因為目前都是雙晶順向式拓墣，由兩顆晶體同時ON及同時OFF，並透過兩顆二極體協助制止的結果，所以可以限制晶體最高承受電壓不會高過Vin，也就是APFC的輸出，APFC輸出控制於380V，所以Vgs 500V耐壓晶體便足以應付。

看來，如果想穩定的使用，還是買ZIPPY會比較安心 ....

這邊


黃色的是VDS Waveform
紅色的是IDS Waveform

唔，不知道是那種結構量到的就是.....只是就在下所知陳述

省料的內幕嗎

剛找到一篇轉貼過來,希望不要被認為是業代(可查IP,隨意)
Seasonic M12 700W
I asked Seasonic about this "descrepency" and it was stated that the "deception" is really quite innocent. Apparently the initial design was for quad rails, and if rails did need to be split up into three or four rails, it would be easy to implement without completely redesigning the platform. Multiple rails can be split up with a separate OCP circuit board, typically screwed to the top of a heatsink.

What Seasonic tells me is that there was an issue with high end video cards overloading a single 12V rail. So with Intel's blessing, Seasonic removed the OCP. Technically, Intel has removed the 240VA rail limit from the ATX12V specfication (although I've yet to see this published on FormFactors.org), and the UL simply considers devices with single output leads with output capability greater than 240VA (12V @ 20A) a different product class (level 6 instead of level 3.)

Although I have little issue with a single 12V rail as it does allow almost any load to be put on almost any connection, I do wish a correction to the label was done. Single 12V rails work well for high end machines with video cards with GPU's that can easily overload your typical rail, but you do miss the advantages of split 12V rails, such as separation of "noise" between rails and the protection provided by the separation so a potential short on one rail doesn't harm a device loation on another.

其實我覺得就bulk電容來說，m12用的是330uF 400V，應該算還可以了吧

硬要說，Z牌的600W也只用330uF 400V，enhance 500w也是330uF

七盟那顆應該是要在高溫使用下，為了壽命問題才上這麼大容量的吧

拿這點來挑剔我覺得不是很妥當就是了

不過同級的產品裡，也是有人拿150uF去並三顆就是

M12最大的問題我想還是沒OCP，昂貴的PSU沒OCP實在說不過去

MOS用500V也是問題，不過要是他們自認撐的過保固期我也沒話說

只是雖尾的是消費者就是了 ，反正還是老話一句，沒人CARE

上面的解釋很有趣啊

kukuku

到底KUKUKU 是什麼阿