This quiz is written to enhance the knowledge and skills of any engineer having a passion towards switchmode power supply technology. This quiz is the first in a series of quizzes that will be put up on this site, to cover various aspects of design and technology, in the field of Power Electronics Design, with a larger emphasis on high frequency switch mode power conversion. The scope shall range from theoretical concepts that are taught in colleges, to practical implementations adopted by the industry. The quiz is targetted for both entry level and experienced power supply designers.
The junction to case thermal resistance is lower
The control drive circuit is simpler
Lower Switching Losses
Lower conduction losses
Higher switching noise at the output
Lower Efficiency
Lower Maximum operating frequency
Higher cost
RHP Zero is eliminated
Stability is easier to achieve over transitions from CCM to DCM and vice versa
Inherent feedforward compensation
Control to Output gain is higher at low frequencies
The power supply output is to be a current source.
Very fast dynamic response is needed.
Modular applications where parallelability with load sharing is required.
Application uses a push-pull transformer.
Application calls for operation from zero load or very low minimum load
Time delays caused by the R-C filter used to sense the current.
Noise on the input line.
ESR of the output capacitor
ESR of the output inductor.
Ensuring that compensating slope has a gradient equal to the inductor current downslope.
Ensuring that compensating slope has a gradient little > half the inductor current downslope.
Ensuring that compensating slope has a gradient equal to twice the inductor current downslope.
By not having any slope compensation.
Ensuring that compensating slope has a gradient little > half the inductor current downslope.
Ensuring that compensating slope has a gradient equal to twice the inductor current downslope.
By not having any slope compensation.
Ensuring that compensating slope has a gradient equal to the inductor current downslope
2 to 3 times switching frequency
Greater than 2/3 times switching frequency
1/6 to 2/3 times switching frequency
Less than 2/3 times switching frequency.
The ESR of the series output inductor
Value of the minimum input line voltage
Time delays caused by the R-C filter used to sense the current.
Turns ratio of the transformer
Controlling the turn-on event of the power switch
Controlling the turn-off event of the power switch
Controlling the switching frequency
Controlling the reference voltage input to the voltage error amplifier
The ESR of the series output inductor
Value of the maximum input line voltage
Turns ratio of the transformer
Time delays caused by the R-C filter used to sense the current.