DESIGN PHASE: measurement
SUB ELEMENT NAME: photo measurement -
forward biased safe operating area measurement
VARIABLE NAME: [HEMTFSOA]
DATE: REVISION LETTER: REVISION DATE:
APPLICABILITY: series regulator
ACTIVITY: Measure (take oscilloscope photograph) of series pass
transistor current vs voltage during turn on or other worse case
condition for forward biased secondary breakdown.
OUTPUT: Labeled photograph in laboratory notebook for comparison
to transistor FBSOA specification and circuit analysis (usually
Spice plots under same conditions).
ALGORITHM:
[HEMTFSOA] = engineer hours for measuring forward biased safe
operating area
[HTMTFSOA] = technician hours for measuring forward biased safe
operating area
0.0 time to make measurement
DISCUSSION:
Original: Foutz, J., Power Supply Circuit Development Estimating Aid - An Expert System Application, IEEE Applied Power Electronics Conference Record, New Orleans, February 1-5, 1988. Revised 25 February 2001
Copyright © 2001 Jerrold Foutz
All Rights Reserved