另外,用 dual loop control(external loop: voltage, internal loop :current )會比 single loop control 來得好, 用dual loop control 只要用兩個普通PI controller 或其他controller就可以做到很好o既效果.....如果用埋loss-less current sense technique簡直係無得彈
[ 本帖最後由 ice1234 於 2008-8-15 14:19 編輯 ]作者: rk2 時間: 2008-8-15 17:47
Find this in Wikipedia :
A buck converter is a step-down DC to DC converter. Its design is similar to the step-up boost converter, and like the boost converter it is a switched-mode power supply that uses two switches (a transistor and a diode) and an inductor and a capacitor.
The simplest way to reduce a DC voltage is to use a voltage divider circuit, but voltage dividers waste energy, since they operate by bleeding off excess voltage as heat; also, output voltage isn't regulated (varies with input voltage). A buck converter, on the other hand, can be remarkably efficient (easily up to 95% for integrated circuits) and self-regulating, making it useful for tasks such as converting the 12-24V typical battery voltage in a laptop down to the few volts needed by the processor.作者: fabianlam1978 時間: 2008-9-8 01:27 標題: 回復 1# 的帖子 i got the compete circuit... and the current can be tuned as well... I'm not in hk now.. PM u later
