Which is better? Voltage mode control or current mode control.

yeongchau

Which is better? Voltage mode control or current mode control for converter design? Please claim your viewpoint.

sjhor

Current mode control is better!!
, ?3 V8 p8 D! s9 Q) W; D4 u& U因為使用穩定性比較佳!! 不同的負載  可能的補償電路可以一次完成!!

但在設計IC的時候  困難度比較高唷!!

monkeybad

Yes, Current Mode Control is better
) z! J) _0 |, ~! Z4 s/ P% |+ R我看一些介紹的資料提到
8 F2 L5 a# k' J+ [1 _電流回授控制有下列優點
1. 線性調整(line regulator)比較好
2 W) h9 l9 Y5 U5 ?" x2. 相位補償比較簡單
3. 具備電流限制功能
+ J; n8 a2 Z/ D" E/ p. V" e' j4 l缺點
1.檢測電感電流的感應電阻電壓容易受到雜訊影響 而導致誤動作
) y( `$ C9 m) a2.需外加slope compensation電路來防止Sub Harmonic發振
' I- A/ V: ~6 I( K' k上述缺點還是可以利用良好的電路設計來改善
. u& L7 `2 p1 T1 ~, ]整體來講還是比較好的

jerryhao

current mode better than voltage mode, because:
* L; c0 e' r7 ^5 @" W9 jcurrent mode has better load and line regulation. and ac compensation is more simple.