Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?
Faster switching time makes higher output voltage possible
Fewer circuit components are required
High-frequency operation allows the use of smaller components✓Правильный ответ
Inherently more stable
Объяснение
A switchmode supply chops the DC at tens or hundreds of kilohertz instead of working at 50 or 60 Hz, so its transformer and filter components store far less energy per cycle and can be much smaller and lighter. It generally needs more parts, not fewer, and switching speed does not raise the available output voltage.