*Static Switch Experimental Results*

The static switch was tested to ensure the safe operation of the voltage bias under any foreseeable condition. The recommended maximum for the safe operating range for the voltage across Vc is 20 V, while the absolute maximum rating is listed at 25 V. It was found that the switch was fully capable of continuous on-time, and two experiments were conducted for the turning on and turning off of the switch to obtain the maximum safe operating region for the voltage bias.

The turn-off experiment shown in Figure 5 was conducted at 30 V/1 A, without a snubber. The voltage across Vc reached a maximum and minimum voltage of 15.9 and 15.1 V, respectively, and poses no threat to the safe operation of the device. The turn-on experiment was run under an open circuit condition to increase the dV/dt of the emitter to its maximum value.

**Figure 5.** Voltage at turn-off across Vc (**above**) and Vce (**below**).

The test voltage was increased until the maximum safe operating area of 20 V across Vc was reached, as shown in Figure 6. The switching period was completed in 50 ns, creating 6 kV/μs dV/dt at the emitter of the transistor. This effect, coupled with the need for voltage bias to recharge the capacitor, created a transient event with a maximum voltage of 19.7 V that lasted roughly 20 μs, before returning to a steady state operation. The test shows that the maximum safe operating area of the device was 300 V as the SSCB must be able to operate under any load, without fear of damage to the switch.

**Figure 6.** Voltage at turn-on across Vc (**above**) and Vce (**below**).
