Hi, I am having some troubles interpreting the switching time curves given in the ON semi datasheet for the MMBTA06 NPN transistor. Its available on the ON website. On pg 3 of the datasheet (fig 4) is a plot with 4 curves of time vs collector current. They are labeled Tr, Tf, Ts, and Td. I am assuming that Tr and Tf are rise and fall time, but what are Ts and Td ? I am guessing T switching and T delay ? I wish they had put in a timing diagram! I searched on the ON site and did not turn up any handy application notes explaining the datasheet.
I am trying to calculate the delay time of this part given the way its biased in the design. Its used to drive a couple FETs as part of a gate driver. We've measured some unexpectedly long delay time in the actual circuit from the logic gate and resistors driving the base to the voltage on the collector and I am trying to understand the parameters that are affecting that.