IRF6668
D.U.T
+
Driver Gate Drive
P.W.
Period
D=
P.W.
Period
+
?
-
Circuit Layout Considerations
? Low Stray Inductance
? Ground Plane
? Low Leakage Inductance
Current Transformer
D.U.T. I SD Waveform
V GS =10V *
?
-
-
?
+
Reverse
Recovery
Current
Body Diode Forward
Current
di/dt
D.U.T. V DS Waveform
?
R G
?
?
?
?
di/dt controlled by R G
Driver same type as D.U.T.
I SD controlled by Duty Factor "D"
D.U.T. - Device Under Test
V DD
+
-
Re-Applied
Voltage
Inductor Curre nt
Diode Recovery
dv/dt
Body Diode Forward Drop
V DD
Ripple  ≤  5%
I SD
* V GS = 5V for Logic Level Devices
Fig 17. Diode Reverse Recovery Test Circuit for N-Channel
HEXFET ? Power MOSFETs
DirectFET ? Substrate and PCB Layout, MZ Outline
(Medium Size Can, Z-Designation).
Please see DirectFET application note AN-1035 for all details regarding the assembly of DirectFET.
This includes all recommendations for stencil and substrate designs.
www.irf.com
7
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