MJE13003K

NPN SILICON TRANSISTOR

UNISONICTECHNOLOGIESCO.,LTD

5 of 8

www.unisonic.com.tw

QW-R223-006,A

SWITCHING TIMES NOTE

In resistive switching circuits, rise, fall, and storage times have been defined and apply to both current and voltage

waveforms since they are in phase. However, for inductive loads, which are common to SWITCHMODE power

supplies and hammer drivers, current and voltage waveforms are not in phase. Therefore, separate measurements

must be made on each waveform to determine the total switching time. For this reason, the following new terms

have been defined.

For the designer, there is minimal switching loss during storage time and the predominant switching power losses

occur during the crossover interval and can be obtained using the standard equation from AN–222:

As is common with most switching transistors, resistive switching is specified at 25°C and has become a

benchmark for designers. However, for designers of high frequency converter circuits, the user oriented

are guaranteed at 100°C.

RESISTIVE SWITCHING PERFORMANCE