IRFR/U3411PbF
Peak Diode Recovery dv/dt Test Circuit
+
Circuit Layout Considerations
• Low Stray Inductance
• Ground Plane
• Low Leakage Inductance
Current Transformer
D.U.T*
-
+
-
-
+
RG
• dv/dt controlled by RG
• ISD controlled by Duty Factor "D"
• D.U.T. - Device Under Test
+
-
VDD
VGS
* Reverse Polarity of D.U.T for P-Channel
Driver Gate Drive
P.W.
Period
Period
D =
P.W.
V
[
=10V
] ***
GS
D.U.T. I Waveform
SD
Reverse
Recovery
Current
Body Diode Forward
Current
di/dt
D.U.T. V Waveform
DS
Diode Recovery
dv/dt
V
DD
]
[
Re-Applied
Voltage
Body Diode
Forward Drop
Inductor Curent
I
[
]
SD
Ripple ≤ 5%
*** VGS = 5.0V for Logic Level and 3V Drive Devices
Fig 14. For N-channel HEXFET® power MOSFETs
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7
KERSEMI [ Kersemi Electronic Co., Ltd. ]
