The reverse recovery time of a diode is t rr = 3 μs and the rate of fall of the diode current (di/dt) = 30 A/μs. Determine the storage charge.

To determine the storage charge (Q) in a diode, we can use the formula:

[ Q = I cdot t_{rr} ]

where:

– ( I ) is the average diode current during the reverse recovery and is calculated from the rate of fall of diode current (( di/dt )) and the reverse recovery time (( t_{rr} )).

Given:

– ( t_{rr} = 3 , mu s )

– ( di/dt = 30 , A/mu s )

First, we can find the average current (I) during the reverse recovery period using the following relationship:

[ I = (di/dt) cdot t_{rr} ]

Now substituting the known values:

[ I = 30 , A/mu s cdot 3 , mu s = 90 , A ]

Now, substituting this value into the equation for storage charge:

[ Q = 90 , A cdot 3 , mu s = 270 , mu C ]

Thus, the storage charge is:

Answer: 270 μC