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关于TPS40193的问题

Other Parts Discussed in Thread: TPS40193

 设计tps40193为DM6467内核供电,按照电源数据手册设计的电路,在调试时发现管脚BP5的电压只有1.6V,而且管脚HDRV和LDRV都没有开关信号输出,输出的是1.4V的直流电。请问会是什么问题?谢谢。附件是设计的原理图