Power semiconductors

In power devices, which loss mainly increases when the switching frequency is raised?

  1. AConduction loss
  2. BSwitching loss
  3. COnly standby leakage loss
Show answer and explanation

Answer: B. Switching loss

Switching loss arises because voltage and current coexist at the moment the device turns on or off; it equals the loss per switching event times the number of switching events (frequency). Raising the frequency allows smaller inductors and capacitors but increases switching loss.

Practice this topic Back to topic

More Power semiconductors questions

  1. Which is a characteristic of a superjunction (SJ) MOSFET?
  2. If a power device with a thermal resistance of 2 °C/W dissipates 10 W, what is the temperature rise?
  3. What is the parasitic diode that forms structurally inside a power MOSFET called?
  4. What is the general term for semiconductors with a larger band gap than silicon, such as SiC and GaN?
  5. What is the main role of a gate driver for power semiconductors?