IRF840B/IRFS840B
Peak Diode Recovery dv/dt Test Circuit & Waveforms
DUT
+
V
DS
_
I
SD
L
Driver
R
G
Same Type
as DUT
V
DD
V
GS
• dv/dt controlled by R
G
• I
SD
controlled by pulse period
V
GS
( Driver )
Gate Pulse Width
D = --------------------------
Gate Pulse Period
10V
I
FM
, Body Diode Forward Current
I
SD
( DUT )
I
RM
di/dt
Body Diode Reverse Current
V
DS
( DUT )
Body Diode Recovery dv/dt
V
SD
V
DD
Body Diode
Forward Voltage Drop
©2001 Fairchild Semiconductor Corporation
Rev. A, November 2001