Thanks for your reply.
It may be the PCB layout which lead this problems. I have lead a thick wire from the bottom of the powerpad holes to the GND, but it can not solve this problems.
My be , I have to make a new pcb layout instead.
Thanks for your reply.
It may be the PCB layout which lead this problems. I have lead a thick wire from the bottom of the powerpad holes to the GND, but it can not solve this problems.
My be , I have to make a new pcb layout instead.