How does an ideal power semiconductor switch work?
The individual power semiconductor switch (Fig. 1-1) applies power to a load when a control signal tells it to do so. The control signal also tells it to turn off. Ideally, the power semiconductor switch should turn on and off in zero time. It should have an infinite impedance when turned off so zero current flows to the load and zero impedance when turned on so that the on-state voltage is zero. Another idealistic characteristic would be that the switch input consumes zero power when the control signal is applied. These idealistic characteristics are unachievable with the present state of the art.
