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TPS25940-Q1: 芯片带载能力不足怎么办

Part Number: TPS25940-Q1

原理图如下:

情况是这样的:前级BPS_15V可以带动后级负载(15V*6*0.3A=27W),但是接了该芯片后带不动后级负载(15V*6*0.05A=4.5W)。

原本认为是ILIM功能导致的,但是100K的RLIM条件下可以带的动 15V*4*0.05A=3W的负载,带 15V*5*0.05A=3.75W的负载存在负载电压下降的情况。

将RLIM从100K降低至50K后P15V的电压在0-3V跳动。

请帮帮我QAQ,很感谢能够提供帮助的各位。