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I chose the FET and diode quite over-rated for the application. Input voltage was 30V. And the FET and Diode have BV above 50V.
Attached is a LTspice simulation. I could not reproduce the weird region between diode conduction zone and the dead zone (where neither diode or FET conducts).
I am...
Could you elaborate more?
We also suspected something wrong with the inductor. However, it turns out that the frequency response and magnetics saturation current of the inductor are very reasonable for the application...
If it is a large parasitic inductance, between which node and which node...
Yes, I understand there are normally three states, when it operates in DCM:
1. Switch ON, Diode OFF;
2. Switch OFF, Diode ON;
3. Switch OFF, Diode OFF.
However, as shown in the scope image attached, there is a weird period (highlighted in red) in our converter between state 2 and state 3. In...
In a buckmode (low-side switch) converter constructed, we encounter a weird problem.
There is a fourth state between diode conduction zone (switch off, diode on) and dead zone (switch off, diode off) as shown in the attached illustration. This significantly harms the converter's efficiency...
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