LMG1210: LMG multiphase interleave

Daniel,

That thread doesn't answer this question: how much variation between chips assuming operating at same temperature. In my design, 4 phase interleave, each phase has 10ns shift , if the variation between the 4 phases is over 1ns, the interleave won't work very well.

That thread says "propagation delay for each device is fixed", first it could vary, for example it varies with temperature; second, this information really not answer my question. my question is if there are 4 drivers on board, are the propagation delay more like 10ns/10ns/9.5ns/10.5ns, or they will be more like 10ns/11ns/12ns/13ns?

Thanks!

Hi,

understood. thank you for the clarification. the variation will likely be >1ns as the channel mismatch is 1ns typical

By saying that prop delay for each device will be more consistent, I just meant that once you measure a specific device, its prop delay is more predictable than device to device.

Let me know if that helps, or if you have any further questions.

Thanks,

Daniel W

Hi, Daniel,

What is channel mismatch? thanks!

Hi Shengnan,

Channel mismatch is the difference in propagation delay between 2 channels. This is designed to be minimized within devices.

Thanks,

Daniel W

if use PWM mode, which has only low side input, does this channel mismatch still exist?