©2003 Fairchild Semiconductor Corporation

FQB9N50C Rev. C1

www.fairchildsemi.com

6

Figure 15. Peak Diode Recovery dv/dt Test Circuit & Waveforms

DUT

+

_

Driver

Same Type

as DUT

• dv/dt controlled by R

G

•I

L

10V

( Driver )

( DUT )

( DUT )

Body Diode

Forward Voltage Drop

I

Body Diode Reverse Current

Body Diode Recovery dv/dt

di/dt

D =

Gate Pulse Width

Gate Pulse Period

--------------------------

DUT

+

_

Driver

Same Type

as DUT

• dv/dt controlled by R

G

•I

LL

10V

( Driver )

( DUT )

( DUT )

Body Diode

Forward Voltage Drop

I

Body Diode Reverse Current

Body Diode Recovery dv/dt

di/dt

D =

Gate Pulse Width

Gate Pulse Period

--------------------------

D =

Gate Pulse Width

Gate Pulse Period

--------------------------