Jonas1893
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Hello, I am a student and I am trying to understand how the Buck converter works. I have a few questions that I do not have an answer to. Can you help me?
1. In the professor's script, we first considered a buck converter with a resistor at the output without a capacitor to derive the formulas. I know that the current in the coil increases with an e-function and then decreases again with an e-function and settles at some point. Now we have a capacitor at the output and no more resistor: How does the current in the coil change when a reverse voltage or a large capacitance is connected to the output?
2. Sketch the coil current when the reverse voltage is greater than the output voltage set via the duty cycle. Additionally, sketch the current in the switch and the free-wheeling diode. I'm not sure how it looks like
3. Explain when you absolutely need a closed loop control for your your buck converter.
Under which conditions is control via the pulse pause ratio?
4. Is it possible to operate a buck converter also with 10GHz?
Thank you so much for your help!
1. In the professor's script, we first considered a buck converter with a resistor at the output without a capacitor to derive the formulas. I know that the current in the coil increases with an e-function and then decreases again with an e-function and settles at some point. Now we have a capacitor at the output and no more resistor: How does the current in the coil change when a reverse voltage or a large capacitance is connected to the output?
2. Sketch the coil current when the reverse voltage is greater than the output voltage set via the duty cycle. Additionally, sketch the current in the switch and the free-wheeling diode. I'm not sure how it looks like
3. Explain when you absolutely need a closed loop control for your your buck converter.
Under which conditions is control via the pulse pause ratio?
4. Is it possible to operate a buck converter also with 10GHz?
Thank you so much for your help!