Fig 15. Peak Diode Recovery dv/dt Test Circuit & Waveforms
DUT
+
VDS
_
IS
L
Driver
RG
Same Type
as DUT
VDD
VGS
• dv/dt controlled by RG
• IS controlled by pulse period
Gate Pulse Width
--------------------------
VGS
D =
Gate Pulse Period
10V
( Driver )
IFM , Body Diode Forward Current
IS
di/dt
( DUT )
IRM
Body Diode Reverse Current
Body Diode Recovery dv/dt
Vf
VDS
( DUT )
VDD
Body Diode
Forward Voltage Drop
◎ SEMIHOW REV.A0,Dec 2005