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MC controller Dead Time jitter??

jomedfree
Associate II
Posted on January 03, 2010 at 22:39

MC controller Dead Time jitter??

1 REPLY 1
jomedfree
Associate II
Posted on May 17, 2011 at 10:00

I have introduced a dead time in the signal generated by the MC controller, just as indicated in the RM. My PCLK is 24MHz, Dead time counter type is 6 bits and value 0xF.

When I checked the waveform with my scope, it appears that the dead time is affected by a random jitter of about 120ns!!!

The jitter of the two outputs of the same phase (U in this case) are correlated: when the ''H'' output dedtime is increased, the ''L'' output is decreased. This is a two states jitter (0-120ns). Strange isn't it?

Does someone encountered this before?