E7D10 : Why is a switching type power supply less expensive and lighter than an equivalent linear power supply?
A
The inverter design does not require an output filter circuit
B
The control circuitry uses less current, therefore smaller heat sinks are required
C
The high frequency inverter design uses much smaller transformers and filter components for an equivalent power output
D
It recovers power from the unused portion of the AC cycle, thus using fewer components
Correct Answer: The high frequency inverter design uses much smaller transformers and filter components for an equivalent power output