topic Re: S12ZVMC128 Overcurrent protection in S12 / MagniV Microcontrollers

S12ZVMC128 Overcurrent protection

xiangxu860 — Wed, 14 Jun 2017 13:51:44 GMT

I use S12ZVMC128 and I have some problems with the overcurrent protection. And I think it maybe the bug of this MCU.

I use the Current Amplifier 0 and Comparator 0 , and I set '0' to the GOCA0 . when overcurrent condition come out , the highside MOS will turn off , and the lowside MOS will turn on .

the problem is that there is no deadtime insertion (4us) between MOSFET swichs . and in normal condition ,there is deadtime insertion .

what can I do to resolve this problem ?

khumphri‌

Mandar‌Deactivated userdhaval RHinnen jimtrudeau Martin vladcentea RChapman

Re: S12ZVMC128 Overcurrent protection

RadekS — Fri, 16 Jun 2017 09:27:36 GMT

Hi Xiang,

I forwarded your report to the responsible design engineer.

Unfortunately, he is now out of office and he should return next week.

I will keep you informed.

I hope it helps you.

Have a great day,
Radek

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Re: S12ZVMC128 Overcurrent protection

RadekS — Tue, 20 Jun 2017 13:20:15 GMT

Hi Xiang,

The responsible designer engineer confirmed that deadtime insertion is not used between MOSFET swichs in the case of overcurrent protection emergency shut-down.

He will look at that topic (how to minimize the chance for FET transistor damaging) and answer as soon as possible.

I suppose, that the GOCA0=1 is not a possible/preferred/optimal solution for your application. Correct?

I hope it helps you.

Have a great day,
Radek