In a resonant transformer the transformer stores energy in the resonant circuit formed by the secondary coil winding and the inter-turn capacitance of that winding.

This stored resonant energy can be used to increase the voltage delivered by the transformer beyond the voltage determined by the primary voltage and the ratio of turns in the secondary vs. the primary windings.

Since the resonant transformer can output a higher voltage it reduces the high-voltage requirements of the power supply, so Answer C. is the right answer.

Last edited by jahman. Register to edit

Tags: none

A circuit to switch something On and Off you can utilize a Relay.

Last edited by jukesj01. Register to edit

Tags: none

In a switching power supply the PWM - Pulse-Width Modulator will switch the width of the pulso to either increase or decrease the average output voltage, thus Answer C. is the right answer.

Last edited by jahman. Register to edit

Tags: none

In a switching power supply the PWM - Pulse-Width Modulator will switch the width of the pulse to keep the output voltage constant.

load impedance is V / R, so given V is fixed in a regulated power supply, a decrease in the load impedance necessarily means an increase in the output current and an increase in the output power.

An increase in the output current and power will mean the PWM will need to increase the pulse width to amintina the output voltage, thus Answer A. is the right answer.

Last edited by jahman. Register to edit

Tags: none

A major consideration for the use of a switching regulator power supply over a linear regulator is that the overall efficiency of a switching regulator is much higher than a linear power supply.

When it comes to power conversion, efficiency is a critical factor. Efficiency refers to the ratio of output power to input power and indicates how effectively a power supply converts input energy into usable output energy.

Switching regulators employ a different mechanism compared to linear regulators for voltage regulation. They utilize high-frequency switching to rapidly control the flow of energy and adjust the output voltage. This switching action allows for more efficient power conversion as it minimizes energy loss.

In contrast, linear regulators regulate the output voltage by dissipating excess energy as heat. This method results in significant energy loss and lower efficiency, especially when the input-output voltage difference is large.

The higher efficiency of switching regulators translates to less energy waste and reduced heat generation, making them more desirable for applications where energy efficiency and heat management are crucial.

Mnemonic: "Efficiency Advantage"

Last edited by kacela. Register to edit

Tags: none

MOSFET - Metal Oxide Semiconductor Field Effect Transistor is a type of FET - Field Effect Transistor designed for power circuits.

FET current is controlled by gate voltage instead of base current as is the case in regular bipolar transistors. This means a FET behaves very much like a vacuum tube triode and thus has a very high input impedance as the gate draws practically no current at all.

The gate in MOSFETs are insulated by an extremely thin insulation layer that can be easily perforated ("punched-through") by even a low voltage static electricity discharge, thus ruining the MOSFET.

Since the MOSFET exhibits both high input impedance and is subject to gate punch-through, Answer B. is the right answer.

Last edited by jahman. Register to edit

Tags: none