Hi,
I would like to ask 2 questions about IDE.
1- During operation of a DC/DC converter, for example Buck Converter in this case, if the buck inductor does not saturate, IDE calculation gives a pretty accurate timing. However, if the saturation current is low and during DCM operation, current value of the inductor may exceed the saturation boundary, linear IDE calculation may not give a result as accurate as in the first case. Therefore, I tried to turn off the SYNCFET with the help of cycle by cycle current limiting property of analog comparators. When the current value drops below of the corresponding limit, I tried to turn off the SYNCFET. However, the system did not operate the way that I want. My question is, how can I configure UCD3138 to work the way that I described.
2- If the first operation is impossible, I will turn off the SYNCFET by using IDE calculation. I configured corresponding enable registers and limits but the main issue, which is not mentioned in the Digital Power Peripherals Programmer's Manuel, is that how does UCD3138 understand whether the operating mode is DCM or CCM. The IDE calculation must be done in DCM not CCM. Therefore, there must be a way to notice the operating mode is DCM. My second question is, is it done by an analog comparator or digital comparator or some other peripherals.
If anybody helps me about this, that would be great.
Thanks in advanced.
Regards,
Steve
