Cause for damaging 5v rail in MWCT1013 EVK.

[JagirMehta]

Hello,

I am using MWCT1013A MP-A9 EVK for a wireless charging project.

I was using it i debug mode & suddenly EVK went power OFF. By checkng HW components, I found that the 5V rail was damaged.

Is any firmware malfunction can damage MWCT1013 EVK ?

[JagirMehta]

Adding few more queries to the original post.

Can any firmware modification damage the 5v rail in EVK ?

Does EVK has any kind of hardware protection for it ?

[xiangjun_rong]

Dear Jagir Mehta,

I think the answer is Yes that the inappropriate software even debugging can leads to the board damage.
For example, you set up the PWM signals which drive the H bridge, if the top Mosfet and bottom Mosfet turn on at the same time, the rail voltage will be short to GND, the power supply will be damaged.

BTW, the in appropriate debugging may damage the board with the same reason.

There is a bit to enable the PWM to continue to output or disabled in debug state.

Hope it can help you.

BR

XiangJun Rong

[JagirMehta]

Thanks XinagJun,

It does solve my query but I have few doubts here.

In my firmware, I take reference of "WCT-15WTXAUTO_V4.1" example firmware received from NXP.

I did not do any modification peripheral driver files(PWM.c /.h & hal.c /.h). I have modified the main.c file as per my use.

Does any malfunctions in main.c file can harm EVK ?

I have used 12v power supply which i received along with MWCT1013A MP-A9 EVK.

Can the power supply damage in debug mode ?

[xiangjun_rong]

Hi,

If you do want to debug the code, I suggest you clear DBGEN bit in the control2 register.

But I do not suggest you set up a break point and debug the code, if the PWM signals still drive the MOSFET, the board maybe damaged, because the feedback loop is invalid when you stop at break point.

You can run the code continuously and output message via uart.

Hope it can help you

BR

XiangJun Rong