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Tool/software:
Hello.
I develop PSFB DCDC converter using TIDM 02000.
When I am testing Peak load, I checked Main Transformer 1st current OCP.
As tou can see below picture, Main Transformer 1st current rising fastly.
I know that when the current reaches the set value, the PWM should be turned off.
It works normally in the part where there is no load change, but when the Main Transformer 1st current increases, the PWM cannot be turned off.
I want to know why the PWM cannot be turned off.
In addition, the PWM on duty decreases before the current increases.
What could be the cause of the PWM on duty decrease? Please help.
Thanks,
Sangmo Kim.
Hello, Sumit.
Below waveform, I think CH2 PWM operation is abnoraml.
Despite the increasing current, CH2 PWM do not turn off.
Then CH2 PWM turn off when up-down count is zero.
I want to know why CH2 PWM do not turn off during current is incresing.
CH2 PWM turn off late. So seems to change frequency 55kHz.
Regrads.
Sangmo Kim.
