您好,我是初学者,一直搞不明白,uc3895是怎么控制输出的相移来控制占空比的?
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AD或者BC管同时导通的时候,变压器原边分别有正负的输入电压加上,此时副边导通对电感充电。所以AD和BC管同时导通的时间除以周期就是占空比。
具体可以参考数据手册第13页时序图。