
我的电路设计原理图如上:输入为+24V,2A,输出为23V,2A,变压器初次级电感量均为27uH,匝数比接近1:1,LM2587S-ADJ2号引脚的反馈电压可通过下面的运放可调,实际测试能调整到1.23V。问题如下:
由于PCB设计问题,LM2587器件背面的GND未接PCB大面积GND地;
按照该原理图焊接好所有器件,出现输入电流很大,达到3A,无输出,器件很烫且很快就烧了(几秒钟),求拍砖!在线等回复,谢谢!
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