Global Standards for the Microelectronics Industry
fall time charge (Qrrf)
That part of the recovered charge that is recovered from the diode during the reverse recovery fall time.
NOTE The time intervals trrf and trrr are defined so that their sum is equal to the reverse recovery time trr, whereas the recovered charge Qrr is defined for an integration time ti. As a consequence, the sum of the partial charges Qrrf and Qrrr will differ from Qrr unless trr equals ti.