This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

新人刚做电源 求大大们指导

Other Parts Discussed in Thread: TL431, LM358

最近公司要求做充电器,采用的是3842的反激式电路。把358拆了测,没有输出电压,有输出电流大概2a左右,万用表测电流的时候会有啸叫。次极端的LED3在闪烁。反馈绕组没有电压,D3阴极测量有10-13V电压。单独给芯片供电各引脚波形都正常。有知道的吗,求指导。变压器参数NP=153 NS=23 NA=18