采用LM21215A+LM10011做为供电电源;
空载时CVDD输出电压1.02V
当连接好C6678是(带上负载) cvdd输出电压为0.72V 原本以为是LM10011调节引起电压下降
去掉LM10011后 输出电压依然是0.72V
LM21215A上VFB的电压值为0.41V 严重怀疑LM21215A的能力,还是我本身电路设计有问题?
下图为设计原理图:
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