输入电压12V、电流9A,需输出3.3V,负载24A。负载是大功率灯珠,每颗灯珠工作电流在1.5A
灯珠在低负载工作时,点亮第7颗灯珠时,输出电压降低到2.6V,所有灯珠亮度变暗,在点亮一颗灯珠时,亮度回归正常,电压恢复到3.3V
这张电路图是切换到FCCM模式,也没有解决问题
这是什么原因????有人遇到吗????求助!!!!
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