TPS92641: TPS92641的LG波形异常问题

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G引脚驱动低边MOS管的路径上串联一个1Ω的电阻，是否需要增加该电阻的值？

In synchronous rectifier, the high speed gate drive signals can generate significant conducted and radiated EMI. This noise can couple with high impedance nodes of the IC and result in undesirable operation. A small (4 Ω to 10 Ω) resistors, RHG and RLG, in series with the gate drive signals are recommended to slow the slew-rate of the SW node and reduce the noise signature. They also improve the robustness of the circuit by reducing the noise coupling in to sensitive nodes such as UDIM, CS, RON and IADJ.

请您从参考datasheet这部说明做只当调整。

l ml 说：

另外在尝试SDIM进行调光的时候，频率给  100Hz/  1KHz   /  10KHz （占空比均为固定50%）下都能清晰的听见电感的啸叫声，这个是什么情况

根据您的说明可能是匹配问题，针对这个新问题建议您重新发帖。