IRFR/U5305
Peak Diode Recovery dv/dt Test Circuit
+
CircuitLayoutConsiderations
• 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 for P-Channel
**UseP-ChannelDriverforP-ChannelMeasurements
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 P-Channel HEXFETS
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7
KERSEMI [ Kersemi Electronic Co., Ltd. ]
