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To turn on the N-channel MOSFET on the high side, a higher voltage against source terminal must be applied to its gate terminal. Usually we use an extrenal driver or charge-pump. Is there any applicat …

In a closed loop boost converter, RHP zeroes will cause a phenomenon called ‘non-minimum phase’, which will make the closed loop system go in the opposite direction first when an external excitation h …

Power converters are said to have a negative dynamic input resistance as long as the control loop is active( ie, within the gain crossover frequnecy). Since the voltage control loop of PFC converters …

This reference models the converter noise as voltage and the filter is an LC filter (from right to left). Another source mentions the converter noise should be considered as current source. Again rea …

The equivalent inductance of 2 identical inductance connected in parallel ( ignoring mutual coupling) is half of the orginal . This result is usually derived from the argument of identical voltage ac …

When I look at the current flow for common mode noise current, I don't see equal impedance between the two paths. I think the equality should be valid only if there are symmetrical paths. Case 1: In …

I guess X-caps are named so since they are connected across the Line and return. Similarly is there any reason for naming Y-caps, which are connected between L/N and GND ?

I see the assumption that the input AC volatge is clean (pure AC), in almost all PFC explanation articles. What if the input AC has some harmonics, say a volatge distortion factor of 10%, would it any …

When we try to predict the circuit behaviour using transfer function, everything works fine in forward direction (Vin to Vout). But if we try to predict the circuit behaviour in reverse direction (Vou …

It is said that "Boost DC voltage output must be higher than the maximum line peak voltage otherwise you will introduce distortion (harmonics)" Shown below is the simulation output for a PFC boost hav …

I understand there are both coupled and un-coupled versions of differential mode chokes as shown below. Which one is better? I see most of the designs having un-coupled version. What is the reason? Co …

I am aware of the following methods. But my intention is to understand the behavior of power converter alone, before adding the controller and feedback loop. FRA analysis: Provides the open loop freq …

In power converter, audio susceptibility refers to line-to-output transfer function. ( Line= Input voltage ) [ Ref : Fundamentals of Power electronics: Erickson ] Why is it named so- "audio-susceptibi …

Usually the chassis of any household equipment is connected to earth ground for safety. Part of the culprit is neutral being connected to Earth ground. (Reasons are mentioned in this post.) My questi …

We have a PFC circuit powered from a bridge rectifier as shown below: Fig 1: We have separate sense terminals to detect the AC voltage levels and accordingly enable the PFC converter (sample circuit …