Neither do we see it because you have a very simple "open loop"I have attached the circuit of buck converter. I understand how this switch mode power supply works.
I don't see any error amplifier and pass element in the circuit.
This is an important point that if the current variation at the remote load is faster that causing variable voltage drop across long cables much faster and the error correction is slower. This can add sensing delays. and due to load capacitance and long wire resistance, the first order low pass filter will be established. The close loop gain and phase margin will then be associated.Another factor is load capacitance. Suppose the disturbance is faster ( step load) than the error correction can respond. In that case, sensing adds delay or 1st order LPF pole in the simple case to an already higher order loop, which can cause more ripple than the resistive load drop. This requires an understanding of closed-loop servos and gain/phase margin.
FET is the pass element
Gate is missing feedback, error amp and driver.
What is the voltage with no load ?
How does the impedance of the switch at %d.f. and X(L) at f ratio with load R affect voltage?
--- Updated ---
Neither do we see it because you have a very simple "open loop"
You may not be ready to understand SMPS until you know about servo control loops.
But if you are an expert car driver, try to read this.
"I think" is no good design partner.I think ... and the other wire should run from bottom of the lower voltage divider resistor to the point of load reference.
Thanks. I will read these documents.Remote senseing...
see page 12 for remote sensing...
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?