Part Number: LM5021
Other Parts Discussed in Thread: TL431
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HI
芯片的供电一般是先母线电压,然后是绕组的二次供电,采用如上外部供电应该也是可以的。
新出现的问题是不稳定吗? 如果确认反馈外,还建议确认变压器设计。