Hi Silcon labs team,
I am currently working on a high end class D powerstage in which I'm considering a gatedriver in the SI824x range. The advertised feature of these chips above the regular SI823x series is the precision deadtime, but there is no tolerance specified in the datasheet of SI824x.
From the datasheet of SI823x, the programmed dead time for a RDT of 6kOhms is specified to be 70ns nominal, with a min of 55ns and a max of 75ns, for a tolerance of +/-21%. What would be the improvement in dead time tolerance be in this range if we went for the SI824x series?
Also, we are considering using variable deadtime. is this supported by these drivers and if so, can we control the deadtime cycle by cycle?
Thanks in advance.
The Si824x is going to have the same tolerance on dead time as the Si823x for a given dead time resistance.
The term precision refers to the tiny deviation in dead time over temperature.