Draytek
Newbie level 5
Hi,
I am trying to design a boost converter using the UCC28 part and im getting some suboscillation on the inductor current and FET Gate. I tried to compensate the slope by following the guidelines from the datasheet but I cant get rid of it completely. The intention is to run this converter in continuous mode for at least 20% or 30% of the full load (80V@300mA).
I dont see yet how to get rid of the suboscillation or if Im doing something wrong. I am actually thinking in setting it up for voltage control instead, to make it unconditionally unstable.
I attached the schematic in LTSPICE. The converter has been laid out with discrete components. The output cap has been reduced in order to speed up the simulation.
I am trying to design a boost converter using the UCC28 part and im getting some suboscillation on the inductor current and FET Gate. I tried to compensate the slope by following the guidelines from the datasheet but I cant get rid of it completely. The intention is to run this converter in continuous mode for at least 20% or 30% of the full load (80V@300mA).
I dont see yet how to get rid of the suboscillation or if Im doing something wrong. I am actually thinking in setting it up for voltage control instead, to make it unconditionally unstable.
I attached the schematic in LTSPICE. The converter has been laid out with discrete components. The output cap has been reduced in order to speed up the simulation.
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