Switching Loss Measurements

DESIGN PHASE:       measurement
SUB ELEMENT NAME:   photo measurement -
                    switching loss measurements
VARIABLE NAME:      [HEMTSLOS]
DATE:               REVISION LETTER:    REVISION DATE:
APPLICABILITY:      switching mode circuits

ACTIVITY:  Measure (oscilloscope photographs) voltage and current
rise and fall times and instantaneous power (digital oscilloscope
or common trigger for voltage and current so that power can be
calculated from photographs).

OUTPUT:  Labeled photographs in laboratory notebook for
comparison to circuit analysis (usually Spice plots under
the same conditions).

ALGORITHM:

[HEMTSLOS] =   engineer hours to measure switching losses
[HTMTSLOS] =   technician hours to measure switching losses
0.0*       =   hours per measurement set
[NPWRXSTR] =   number of measurement sets

DISCUSSION:

Author: Jerrold Foutz, foutz@smpstech.com

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