What characterizes the output current delivered by PWM DC-DC converters___________?
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Answer: C. Either A. or B.
Explanation
The output current of a pulse width modulated direct current to direct current converter depends on circuit configuration. It can be expressed directly as the average value of the continuous output inductor current. Alternatively it can be calculated as the product of average inductor current and a function of duty ratio. Pulse width modulation techniques control the average voltage delivered to converter loads by varying duty cycles. Inductors in direct current converters smooth out current ripples during continuous conduction mode operation. Duty ratio represents the fraction of time a switching transistor remains in the active conducting state.
Option A is partially correct because the output current often equals the average inductor current in steady state. Option B is also a valid mathematical formulation used to analyze converter dynamics under specific operating conditions. Option D is incorrect because valid analytical expressions for the output current are indeed provided in options A and B.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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