LP5030:LP5030 Reset Occurring at 1kV Due to Surge Test

Hi Kwangyoung,

0X3C00 is the default value of the registers so it looks the LP5030 is reset.

LP5030 will enter reset when RESET(registers)  = FFh or triggered by UVLO. so please check about your power supply firstly when the surge is applied.

BR

Monet Xu 

Thank you for your reply. I'll check it out. 

Hi Lee,

I will follow up this problem, please let me know your find out after you check it. Thanks!

BR, Jared

The result of checking the above phenomenon is that TPS226601 (EFUSE) is designed at the power supply end, and LM46002 (3.3V converter) is output below 2.0V due to a voltage drop at the EFUSE output end when Surge is applied, which is affected by LP5030 (LED Driver) power. If there is any other surge plan other than adding a large CAP (2.2mF) to the EFUSE output end, please reply.

It's TPS26601. (correcting the import)