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IRF4905LPBF Datasheet(PDF) 8 Page - International Rectifier

Part No. IRF4905LPBF
Description  HEXFET Power MOSFET
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Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
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IRF4905S/L
8
www.irf.com
Fig 17.
Peak Diode Recovery dv/dt Test Circuit for P-Channel
HEXFET® Power MOSFETs
Circuit Layout Considerations
• Low Stray Inductance
• Ground Plane
• Low Leakage Inductance
Current Transformer
P.W.
Period
di/dt
Diode Recovery
dv/dt
Ripple
≤ 5%
Body Diode
Forward Drop
Re-Applied
Voltage
Reverse
Recovery
Current
Body Diode Forward
Current
VGS=10V
VDD
ISD
Driver Gate Drive
D.U.T. ISD Waveform
D.U.T. VDS Waveform
Inductor Curent
D =
P.W.
Period
* VGS = 5V for Logic Level Devices
*
+
-
+
+
+
-
-
-
ƒ
„
‚
RG
VDD
• dv/dt controlled by RG
• Driver same type as D.U.T.
• ISD controlled by Duty Factor "D"
• D.U.T. - Device Under Test
D.U.T
**

Fig 18a. Switching Time Test Circuit
Fig 18b. Switching Time Waveforms
VDS
90%
10%
VGS
td(on)
tr
td(off) tf
VDS
VGS
Pulse Width ≤ 1 µs
Duty Factor ≤ 0.1 %
RD
VGS
VDD
RG
D.U.T.
** Reverse Polarity of D.U.T for P-Channel




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