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无法起动降压电路，输出端有电压输出，带上负载后，电路保护。HO1 HO2引脚无输出。
Hi
电路你可以借助芯片官网的在线仿真webench确认一下，从你描述看更像是layout导致的问题，建议你确认电流保护，以及功率回路尽量小。
